FCC ID: I88NBG418N Wireless N Home Router Model No.: NBG-418N

CHAPTER 13 Remote Management 13.1 Overview This chapter provides information on the Remote Management screens. Remote management allows you to determine which services/protocols can access which NBG-

418N interface (if any) from which computers. You may manage your NBG-418N from a remote location via:

LAN only LAN and WAN Note: When you configure remote management to allow management from the LAN and WAN in the options above, you still need to configure a firewall rule to allow access. See the firewall chapters for details on configuring firewall rules. NBG-418N Users Guide 115 Chapter 13 Remote Management 13.1.1 Remote Management Limitations Remote management over LAN or WAN will not work when:

1 2 3 4 You have disabled that service in one of the remote management screens. The IP address in the Secured Client WAN IP Address field does not match the client IP address. If it does not match, the NBG-418N will disconnect the session immediately. There is already another remote management session with an equal or higher priority running. You may only have one remote management session running at one time. There is a firewall rule that blocks it. 13.1.2 Remote Management and NAT When NAT is enabled:

Use the NBG-418Ns WAN IP address when configuring from the WAN. Use the NBG-418Ns LAN IP address when configuring from the LAN. 13.1.3 System Timeout There is a default system management idle timeout of five minutes (three hundred seconds). The NBG-418N automatically logs you out if the management session remains idle for longer than this timeout period. The management session does not time out when a statistics screen is polling. You can change the timeout period in the System screen. 13.2 WWW Screen To change your NBG-418Ns World Wide Web settings, click Management > Remote MGMT to display the WWW screen. Figure 81 Management > Remote MGMT > WWW 116 NBG-418N Users Guide Chapter 13 Remote Management The following table describes the labels in this screen. Table 51 Management > Remote MGMT > WWW LABEL Server Port DESCRIPTION You may change the server port number for a service if needed, however you must use the same port number in order to use that service for remote management. Server Access Select the interface(s) through which a computer may access the NBG-418N using this service. Secured Client WAN IP Address A secured client is a trusted computer that is allowed to communicate with the NBG-418N using this service. Select All to allow any computer to access the NBG-418N using this service. Choose Selected to just allow the computer with the IP address that you specify to access the NBG-418N using this service. Apply Reset Note: This only applies on WAN IP. Click Apply to save your customized settings and exit this screen. Click Reset to begin configuring this screen afresh. NBG-418N Users Guide 117 Chapter 13 Remote Management 118 NBG-418N Users Guide CHAPTER 14 Universal Plug-and-Play (UPnP) 14.1 Overview This chapter introduces the UPnP feature in the Web Configurator. Universal Plug and Play (UPnP) is a distributed, open networking standard that uses TCP/IP for simple peer-to-peer network connectivity between devices. A UPnP device can dynamically join a network, obtain an IP address, convey its capabilities and learn about other devices on the network. In turn, a device can leave a network smoothly and automatically when it is no longer in use. 14.2 What You Need to Know How do I know if I'm using UPnP?

UPnP hardware is identified as an icon in the Network Connections folder (Windows XP). Each UPnP compatible device installed on your network will appear as a separate icon. Selecting the icon of a UPnP device will allow you to access the information and properties of that device. NAT Traversal UPnP NAT traversal automates the process of allowing an application to operate through NAT. UPnP network devices can automatically configure network addressing, announce their presence in the network to other UPnP devices and enable exchange of simple product and service descriptions. NAT traversal allows the following:

Dynamic port mapping Learning public IP addresses Assigning lease times to mappings Windows Messenger is an example of an application that supports NAT traversal and UPnP. See the NAT chapter for more information on NAT. Cautions with UPnP The automated nature of NAT traversal applications in establishing their own services and opening firewall ports may present network security issues. Network information and configuration may also be obtained and modified by users in some network environments. When a UPnP device joins a network, it announces its presence with a multicast message. For security reasons, the NBG-418N allows multicast messages on the LAN only. NBG-418N Users Guide 119 Chapter 14 Universal Plug-and-Play (UPnP) All UPnP-enabled devices may communicate freely with each other without additional configuration. Disable UPnP if this is not your intention. 14.3 Configuring UPnP Use this screen to enable UPnP. Click the Management > UPnP to open the following screen. Figure 82 Management > UPnP > General The following table describes the labels in this screen. Table 52 Management > UPnP > General LABEL DESCRIPTION Select this check box to activate UPnP. Be aware that anyone could use a UPnP Enable the Universal Plug application to open the Web Configurator's login screen without entering the and Play (UPnP) Feature NBG-418N's IP address (although you must still enter the password to access the Web Configurator). Allow users to make port forwarding changes through UPnP Select this check box to allow UPnP-enabled applications to automatically configure the NBG-418N so that they can communicate through the NBG-418N, for example, by using NAT traversal. UPnP applications automatically reserve a NAT forwarding port in order to communicate with another UPnP enabled device. this eliminates the need to manually configure port forwarding for the UPnP enabled application. Apply Reset Click Apply to save the setting to the NBG-418N. Click Reset to begin configuring this screen afresh. 14.3.1 Using UPnP in Windows XP Example This section shows you how to use the UPnP feature in Windows XP. You must already have UPnP installed in Windows XP and UPnP activated on the NBG-418N. Make sure the computer is connected to a LAN port of the NBG-418N. Turn on your computer and the NBG-418N. 14.3.1.1 Auto-discover Your UPnP-enabled Network Device 1 Click start and Control Panel. Double-click Network Connections. An icon displays under Internet Gateway. 120 NBG-418N Users Guide 2 Right-click the icon and select Properties. Figure 83 Network Connections Chapter 14 Universal Plug-and-Play (UPnP) 3 In the Internet Connection Properties window, click Settings to see the port mappings there were automatically created. Figure 84 Internet Connection Properties 4 You may edit or delete the port mappings or click Add to manually add port mappings. Figure 85 Internet Connection Properties: Advanced Settings NBG-418N Users Guide 121 Chapter 14 Universal Plug-and-Play (UPnP) Figure 86 Internet Connection Properties: Advanced Settings: Add Note: When the UPnP-enabled device is disconnected from your computer, all port mappings will be deleted automatically. 5 Select Show icon in notification area when connected option and click OK. An icon displays in the system tray. Figure 87 System Tray Icon 6 Double-click on the icon to display your current Internet connection status. Figure 88 Internet Connection Status 14.3.2 Web Configurator Easy Access With UPnP, you can access the web-based configurator on the NBG-418N without finding out the IP address of the NBG-418N first. This comes helpful if you do not know the IP address of the NBG-

418N. Follow the steps below to access the Web Configurator. 1 Click Start and then Control Panel. 2 Double-click Network Connections. 122 NBG-418N Users Guide 3 Select My Network Places under Other Places. Figure 89 Network Connections Chapter 14 Universal Plug-and-Play (UPnP) 4 5 An icon with the description for each UPnP-enabled device displays under Local Network. Right-click on the icon for your NBG-418N and select Invoke. The Web Configurator login screen displays. Figure 90 Network Connections: My Network Places NBG-418N Users Guide 123 Chapter 14 Universal Plug-and-Play (UPnP) 124 NBG-418N Users Guide CHAPTER 15 System 15.1 Overview This chapter provides information on the System screens. See the chapter about wizard setup for more information on the next few screens. 15.2 What You Can Do Use the General screen to enter a name to identify the NBG-418N in the network and set the password (Section 15.3 on page 125). Use the Time Setting screen to change your NBG-418Ns time and date (Section 15.4 on page 126). 15.3 System General Screen Use this screen to enter a name to identify the NBG-418N in the network and set the password. Click Maintenance > System. The following screen displays. Figure 91 Maintenance > System > General NBG-418N Users Guide 125 Chapter 15 System The following table describes the labels in this screen. Table 53 Maintenance > System > General LABEL System Setup DESCRIPTION System Name System Name is a unique name to identify the NBG-418N in an Ethernet network. It is recommended you enter your computers Computer name in this field (see the chapter about wizard setup for how to find your computers name). This name can be up to 30 alphanumeric characters long. Spaces are not allowed, but dashes - and underscores "_" are accepted. Domain Name Enter the domain name (if you know it) here. If you leave this field blank, the ISP may assign a domain name via DHCP. Administrator Inactivity Timer The domain name entered by you is given priority over the ISP assigned domain name. Type how many minutes a management session can be left idle before the session times out. The default is 5 minutes. After it times out you have to log in with your password again. Very long idle timeouts may have security risks. A value of "0" means a management session never times out, no matter how long it has been left idle (not recommended). Password Setup Change your NBG-418Ns password (recommended) using the fields as shown. Old Password New Password Type the default password or the existing password you use to access the system in this field. Type your new system password (up to 30 characters). Note that as you type a password, the screen displays an asterisk (*) for each character you type. Retype to Confirm Type the new password again in this field. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. 15.4 Time Setting Screen To change your NBG-418Ns time and date, click Maintenance > System > Time Setting. The screen appears as shown. Use this screen to configure the NBG-418Ns time based on your local time zone. 126 NBG-418N Users Guide Figure 92 Maintenance > System > Time Setting Chapter 15 System The following table describes the labels in this screen. Table 54 Maintenance > System > Time Setting LABEL Current Time and Date DESCRIPTION Current Time This field displays the time of your NBG-418N. Each time you reload this page, the NBG-418N synchronizes the time with the time server. Current Date This field displays the date of your NBG-418N. Each time you reload this page, the NBG-418N synchronizes the date with the time server. Time and Date Setup Manual Copy Your Computers Time Settings New Time

(hh:mm:ss) Select this radio button to enter the time and date manually. If you configure a new time and date, Time Zone and Daylight Saving at the same time, the new time and date you entered has priority and the Time Zone and Daylight Saving settings do not affect it. Click this to copy the time settings of your computer into the NBG-418Ns time and date setup. This field displays the last updated time from the time server or the last time configured manually. When you set Time and Date Setup to Manual, enter the new time in this field and then click Apply. NBG-418N Users Guide 127 Chapter 15 System Table 54 Maintenance > System > Time Setting (continued) LABEL New Date DESCRIPTION This field displays the last updated date from the time server or the last date configured manually.

(yyyy/mm/dd) When you set Time and Date Setup to Manual, enter the new date in this field and then click Apply. Get from Time Server Select this radio button to have the NBG-418N get the time and date from the time server you specified below. Auto Select Auto to have the NBG-418N automatically search for an available time server and synchronize the date and time with the time server after you click Apply. User Defined Time Server Address Select User Defined Time Server Address and enter the IP address or URL (up to 20 extended ASCII characters in length) of your time server. Check with your ISP/network administrator if you are unsure of this information. Time Zone Setup Time Zone Daylight Savings Choose the time zone of your location. This will set the time difference between your time zone and Greenwich Mean Time (GMT). Daylight saving is a period from late spring to early fall when many countries set their clocks ahead of normal local time by one hour to give more daytime light in the evening. Select this option if you use Daylight Saving Time. Start Date Configure the day and time when Daylight Saving Time starts if you selected Daylight Savings. The o'clock field uses the 24 hour format. Here are a couple of examples:

Daylight Saving Time starts in most parts of the United States on the first Sunday of April. Each time zone in the United States starts using Daylight Saving Time at 2 A.M. local time. So in the United States you would select First, Sunday, April and type 2 in the o'clock field. Daylight Saving Time starts in the European Union on the last Sunday of March. All of the time zones in the European Union start using Daylight Saving Time at the same moment (1 A.M. GMT or UTC). So in the European Union you would select Last, Sunday, March. The time you type in the o'clock field depends on your time zone. In Germany for instance, you would type 2 because Germany's time zone is one hour ahead of GMT or UTC (GMT+1). End Date Configure the day and time when Daylight Saving Time ends if you selected Daylight Savings. The o'clock field uses the 24 hour format. Here are a couple of examples:

Daylight Saving Time ends in the United States on the last Sunday of October. Each time zone in the United States stops using Daylight Saving Time at 2 A.M. local time. So in the United States you would select Last, Sunday, October and type 2 in the o'clock field. Daylight Saving Time ends in the European Union on the last Sunday of October. All of the time zones in the European Union stop using Daylight Saving Time at the same moment (1 A.M. GMT or UTC). So in the European Union you would select Last, Sunday, October. The time you type in the o'clock field depends on your time zone. In Germany for instance, you would type 2 because Germany's time zone is one hour ahead of GMT or UTC (GMT+1). Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. 128 NBG-418N Users Guide CHAPTER 16 Logs 16.1 Overview This chapter contains information about configuring general log settings and viewing the NBG-

418Ns logs. The Web Configurator allows you to look at all of the NBG-418Ns logs in one location. 16.2 What You Need to Know An alert is a type of log that warrants more serious attention. They include system errors, attacks

(access control) and attempted access to blocked web sites or web sites with restricted web features such as cookies, active X and so on. Some categories such as System Errors consist of both logs and alerts. You may differentiate them by their color in the View Log screen. Alerts display in red and logs display in black. Alerts are e-mailed as soon as they happen. Logs may be e-mailed as soon as the log is full (see Log Schedule). Selecting many alert and/or log categories (especially Access Control) may result in many e-mails being sent. 16.3 View Log Screen Use the View Log screen to see the logged messages for the NBG-418N. Options include logs about system maintenance, system errors, access control, allowed or blocked web sites, blocked web features (such as ActiveX controls, Java and cookies), attacks (such as DoS) and IPSec. Log entries in red indicate system error logs. The log wraps around and deletes the old entries after it fills. Click a column heading to sort the entries. A triangle indicates ascending or descending sort order. Click Maintenance > Logs to open the View Log screen. NBG-418N Users Guide 129 Chapter 16 Logs Figure 93 Maintenance > Logs > View Log The following table describes the labels in this screen. Table 55 Maintenance > Logs > View Log LABEL Refresh DESCRIPTION Click Refresh to renew the log screen. Clear Logs Click Clear Logs to delete all the logs. Next Last

Time Click Next to show the next page of log entries. Click Last to show the last page of log entries. This is the index number of the log entry. This field displays the time the log was recorded. See the chapter on system maintenance and information to configure the NBG-418Ns time and date. Message This field states the reason for the log. 130 NBG-418N Users Guide CHAPTER 17 Tools 17.1 Overview This chapter shows you how to upload a new firmware, upload or save backup configuration files and restart the NBG-418N. 17.2 What You Can Do Use the Firmware screen to upload firmware to your NBG-418N (Section 17.3 on page 131). Use the Configuration screen to view information related to factory defaults, backup configuration, and restoring configuration (Section 17.4 on page 133). Use the Restart screen to have the NBG-418N reboot (Section 17.5 on page 134). 17.3 Firmware Upload Screen Find firmware at www.zyxel.com in a file that (usually) uses the system model name with a *.bin extension, e.g., NBG-418N.bin. The upload process uses HTTP (Hypertext Transfer Protocol) and may take up to two minutes. After a successful upload, the system will reboot. Click Maintenance > Tools. Follow the instructions in this screen to upload firmware to your NBG-

418N. Figure 94 Maintenance > Tools > Firmware NBG-418N Users Guide 131 Chapter 17 Tools The following table describes the labels in this screen. Table 56 Maintenance > Tools > Firmware LABEL File Path DESCRIPTION Type in the location of the file you want to upload in this field or click Browse... to find it. Browse... Click Browse... to find the .bin file you want to upload. Remember that you must decompress compressed (.zip) files before you can upload them. Upload Click Upload to begin the upload process. This process may take up to two minutes. Note: Do not turn off the NBG-418N while firmware upload is in progress!

After you see the Firmware Upload In Process screen, wait for several minutes before logging into the NBG-418N again. Figure 95 Upload Warning The NBG-418N automatically restarts in this time causing a temporary network disconnect. In some operating systems, you may see the following icon on your desktop. Figure 96 Network Temporarily Disconnected After two minutes, log in again and check your new firmware version in the Status screen. If the upload was not successful, the following screen will appear. Click Return to go back to the Firmware screen. Figure 97 Upload Error Message 132 NBG-418N Users Guide 17.4 Configuration Screen Click Maintenance > Tools > Configuration. Information related to factory defaults, backup configuration, and restoring configuration appears as shown next. Figure 98 Maintenance > Tools > Configuration Chapter 17 Tools 17.4.1 Backup Configuration Backup configuration allows you to back up (save) the NBG-418Ns current configuration to a file on your computer. Once your NBG-418N is configured and functioning properly, it is highly recommended that you back up your configuration file before making configuration changes. The backup configuration file will be useful in case you need to return to your previous settings. Click Backup to save the NBG-418Ns current configuration to your computer. 17.4.2 Restore Configuration Restore configuration allows you to upload a new or previously saved configuration file from your computer to your NBG-418N. Table 57 Maintenance Restore Configuration LABEL File Path DESCRIPTION Type in the location of the file you want to upload in this field or click Browse... to find it. Browse... Click Browse... to find the file you want to upload. Remember that you must decompress compressed (.ZIP) files before you can upload them. Upload Click Upload to begin the upload process. Note: Do not turn off the NBG-418N while configuration file upload is in progress. NBG-418N Users Guide 133 Chapter 17 Tools After you see a configuration upload successful screen, you must then wait one minute before logging into the NBG-418N again. Figure 99 Configuration Restore Successful The NBG-418N automatically restarts in this time causing a temporary network disconnect. In some operating systems, you may see the following icon on your desktop. Figure 100 Temporarily Disconnected If you uploaded the default configuration file you may need to change the IP address of your computer to be in the same subnet as that of the default NBG-418N IP address (192.168.1.1 in router mode). See Appendix C on page 167 for details on how to set up your computers IP address. If the upload was not successful, the following screen will appear. Click Return to go back to the Configuration screen. Figure 101 Configuration Restore Error 17.4.3 Back to Factory Defaults Pressing the Reset button in this section clears all user-entered configuration information and returns the NBG-418N to its factory defaults. You can also press the RESET button on the rear panel to reset the factory defaults of your NBG-

418N. Refer to Section 2.3.1 on page 19 for more information on the RESET button. 17.5 Restart Screen System restart allows you to reboot the NBG-418N without turning the power off. 134 NBG-418N Users Guide Click Maintenance > Tools > Restart. Click Restart to have the NBG-418N reboot. This does not affect the NBG-418N's configuration. Figure 102 Maintenance > Tools > Restart Chapter 17 Tools NBG-418N Users Guide 135 Chapter 17 Tools 136 NBG-418N Users Guide CHAPTER 18 Sys OP Mode 18.1 Overview The Sys OP Mode (System Operation Mode) function lets you configure select the device operation mode: Router, Access Point, Client Bridge or Universal Repeater. See Chapter 4 on page 35 for more information on which mode to choose. 18.2 General Screen Use this screen to select how you connect to the Internet. Figure 103 Maintenance > Sys OP Mode > General The following table describes the labels in the General screen. Table 58 Maintenance > Sys Op Mode > General LABEL System Operation Mode DESCRIPTION Router Use this mode if you want to use routing functions such as LAN DHCP, NAT, firewall and so on on the NBG-418N (N). The NBG-418N has separate LAN and WAN network IP addresses. Access Point Use this mode if you already have a Router (R) in your network and you want to bridge all wired and wireless network connections. NBG-418N Users Guide 137 Chapter 18 Sys OP Mode Table 58 Maintenance > Sys Op Mode > General (continued) LABEL Universal Repeater Use this mode if there is an existing wireless router or access point in your network and you want the NBG-418N to wirelessly relay communications from its wireless clients to it. DESCRIPTION Client Bridge Use this mode if there is an existing wireless router or access point (AP) in the network to which you want to connect your NBG-418N wirelessly. You should know the SSID and wireless security details of the wireless router or access point to which you want to connect. Apply Reset Click Apply to save your settings. Click Reset to return to the previous screen settings. If you select Router mode, the following pop-up message window appears. Figure 104 Maintenance > Sys Op Mode > General: Router In this mode there are both LAN and WAN ports. The LAN Ethernet and WAN Ethernet ports have different IP addresses. The DHCP server on your device is enabled and allocates IP addresses to other devices on your local network. The LAN IP address of the NBG-418N is set to 192.168.1.1. You can configure the IP address settings on your WAN port. Contact your ISP or system administrator for more information on appropriate settings. If you select a non-router mode (Access Point, Client Bridge or Universal Repeater) the following pop-up message window appears. Figure 105 Maintenance > Sys Op Mode > General: Non-Router In non-router mode, all Ethernet ports have the same IP address. All ports on the rear panel of the device are LAN ports, including the port labeled WAN. There is no WAN port. The DHCP server on your device is disabled. In this mode there must be a device with a DHCP server on your network such as a router which can allocate IP addresses or else you need to manually assign IP addresses to devices on your network. The LAN IP address of the NBG-418N is set to 192.168.1.2. 138 NBG-418N Users Guide CHAPTER 19 Language 19.1 Language Screen Use this screen to change the language for the Web Configurator display. Click the language you prefer. The Web Configurator language changes after a while without restarting the NBG-418N. Figure 106 Language Figure 107 Language Change Example NBG-418N Users Guide 139 Chapter 19 Language 140 NBG-418N Users Guide CHAPTER 20 Troubleshooting This chapter offers some suggestions to solve problems you might encounter. The potential problems are divided into the following categories. Power, Hardware Connections, and LEDs NBG-418N Access and Login Internet Access Resetting the NBG-418N to Its Factory Defaults Wireless Problems 20.1 Power, Hardware Connections, and LEDs The NBG-418N does not turn on. None of the LEDs turn on. 1 Make sure you are using the power adaptor or cord included with the NBG-418N. 2 Make sure the power adaptor or cord is connected to the NBG-418N and plugged in to an appropriate power source. Make sure the power source is turned on. 3 Disconnect and re-connect the power adaptor or cord to the NBG-418N. 4 If the problem continues, contact the vendor. One of the LEDs does not behave as expected. 1 Make sure you understand the normal behavior of the LED. See Section 1.3 on page 15. 2 3 Check the hardware connections. See the Quick Start Guide. Inspect your cables for damage. Contact the vendor to replace any damaged cables. 4 Disconnect and re-connect the power adaptor to the NBG-418N. 5 If the problem continues, contact the vendor. NBG-418N Users Guide 141 Chapter 20 Troubleshooting 20.2 NBG-418N Access and Login I dont know the IP address of my NBG-418N. 1 2 3 4 The default IP address in router mode is 192.168.1.1 and in non-router mode is 192.168.1.2. If you changed the IP address and have forgotten it, you might get the IP address of the NBG-418N by looking up the IP address of the default gateway for your computer. To do this in most Windows computers, click Start > Run, enter cmd, and then enter ipconfig. The IP address of the Default Gateway might be the IP address of the NBG-418N (it depends on the network), so enter this IP address in your Internet browser.Set your device to Router Mode, login (see the Quick Start Guide for instructions) and go to the Device Information table in the Status screen. Your NBG-418Ns IP address is available in the Device Information table. If the DHCP setting under LAN information is None, your device has a fixed IP address. If the DHCP setting under LAN information is Client, then your device receives an IP address from a DHCP server on the network. If your NBG-418N is a DHCP client, you can find your IP address from the DHCP server. This information is only available from the DHCP server which allocates IP addresses on your network. Find this information directly from the DHCP server or contact your system administrator for more information. Reset your NBG-418N to change all settings back to their default. This means your current settings are lost. See Section 20.4 on page 144 in the Troubleshooting for information on resetting your NBG-418N. I forgot the username and password. 1 2 The default username is admin and default password is 1234. If this does not work, you have to reset the device to its factory defaults. See Section 20.4 on page 144. I cannot see or access the Login screen in the Web Configurator. 1 Make sure you are using the correct IP address. The default IP address is 192.168.1.1 (router mode). If you changed the IP address, use the new IP address. If you changed the IP address and have forgotten it, see the troubleshooting suggestions for I dont know the IP address of my NBG-418N. 142 NBG-418N Users Guide Chapter 20 Troubleshooting 2 Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick Start Guide. 3 Make sure your Internet browser does not block pop-up windows and has JavaScript and Java enabled. See Appendix B on page 157. 4 Make sure your computer is in the same subnet as the NBG-418N. (If you know that there are routers between your computer and the NBG-418N, skip this step.) If there is a DHCP server on your network, make sure your computer is using a dynamic IP address. If there is no DHCP server on your network, make sure your computers IP address is in the same subnet as the NBG-418N. 5 6 Reset the device to its factory defaults, and try to access the NBG-418N with the default IP address. If the problem continues, contact the network administrator or vendor, or try one of the advanced suggestions. Advanced Suggestions If your computer is connected to the WAN port or is connected wirelessly, use a computer that is connected to a LAN/ETHERNET port. I can see the Login screen, but I cannot log in to the NBG-418N. 1 Make sure you have entered the password correctly. The default username is admin and default password is 1234. This field is case-sensitive, so make sure [Caps Lock] is not on. 2 This can happen when you fail to log out properly from your last session. Try logging in again after 5 minutes. 3 Disconnect and re-connect the power adaptor or cord to the NBG-418N. 4 If this does not work, you have to reset the device to its factory defaults. See Section 20.4 on page 144. 20.3 Internet Access I cannot access the Internet. 1 Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick Start Guide. 2 Make sure you entered your ISP account information correctly in the wizard. These fields are case-

sensitive, so make sure [Caps Lock] is not on. NBG-418N Users Guide 143 Chapter 20 Troubleshooting 3 If you are trying to access the Internet wirelessly, make sure the wireless settings in the wireless client are the same as the settings in the AP. 4 Disconnect all the cables from your device, and follow the directions in the Quick Start Guide again. 5 Go to Maintenance > Sys OP Mode > General. Check your System Operation Mode setting. 6 If the problem continues, contact your ISP. I cannot access the Internet anymore. I had access to the Internet (with the NBG-418N), but my Internet connection is not available anymore. 1 2 3 Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick Start Guide and Section 1.3 on page 15. Reboot the NBG-418N. If the problem continues, contact your ISP. The Internet connection is slow or intermittent. 1 2 3 4 There might be a lot of traffic on the network. Look at the LEDs, and check Section 1.3 on page 15. If the NBG-418N is sending or receiving a lot of information, try closing some programs that use the Internet, especially peer-to-peer applications. Check the signal strength. If the signal strength is low, try moving the NBG-418N closer to the AP if possible, and look around to see if there are any devices that might be interfering with the wireless network (for example, microwaves, other wireless networks, and so on). Reboot the NBG-418N. If the problem continues, contact the network administrator or vendor, or try one of the advanced suggestions. Advanced Suggestion Check the settings for QoS. If it is disabled, you might consider activating it. 20.4 Resetting the NBG-418N to Its Factory Defaults If you reset the NBG-418N, you lose all of the changes you have made. The NBG-418N re-loads its default settings, and the username/password resets to admin/1234. You have to make all of your changes again. 144 NBG-418N Users Guide Chapter 20 Troubleshooting You will lose all of your changes when you push the RESET button. To reset the NBG-418N, 1 Make sure the power LED is on. 2 3 Press the RESET button for longer than 1 second to restart/reboot the NBG-418N. Press the RESET button for longer than five seconds to set the NBG-418N back to its factory-

default configurations. If the NBG-418N restarts automatically, wait for the NBG-418N to finish restarting, and log in to the Web Configurator. The username is admin and password is 1234. If the NBG-418N does not restart automatically, disconnect and reconnect the NBG-418Ns power. Then, follow the directions above again. 20.5 Wireless Problems I cannot access the NBG-418N or ping any computer from the WLAN. 1 Make sure the wireless LAN is enabled on the NBG-418N. 2 Make sure the wireless adapter on the wireless station is working properly. 3 Make sure the wireless adapter installed on your computer is IEEE 802.11 compatible and supports the same wireless standard as the NBG-418N. 4 Make sure your computer (with a wireless adapter installed) is within the transmission range of the NBG-418N. 5 Check that both the NBG-418N and your wireless station are using the same wireless and wireless security settings. 6 Make sure traffic between the WLAN and the LAN is not blocked by the firewall on the NBG-418N. 7 Make sure you allow the NBG-418N to be remotely accessed through the WLAN interface. Check your remote management settings. See Chapter 6 Wireless LAN for more information. I cannot access the Web Configurator after I switched to a non-router mode. NBG-418N Users Guide 145 Chapter 20 Troubleshooting When you change from router mode to a non-router mode, you must manually give your computer an IP address in the range between 192.168.1.3 and 192.168.1.254 as non-router mode has no LAN DHCP server. Refer to Appendix C on page 167 for instructions on how to change your computers IP address. 146 NBG-418N Users Guide APPENDIX A IP Addresses and Subnetting This appendix introduces IP addresses and subnet masks. IP addresses identify individual devices on a network. Every networking device (including computers, servers, routers, printers, etc.) needs an IP address to communicate across the network. These networking devices are also known as hosts. Subnet masks determine the maximum number of possible hosts on a network. You can also use subnet masks to divide one network into multiple sub-networks. Introduction to IP Addresses One part of the IP address is the network number, and the other part is the host ID. In the same way that houses on a street share a common street name, the hosts on a network share a common network number. Similarly, as each house has its own house number, each host on the network has its own unique identifying number - the host ID. Routers use the network number to send packets to the correct network, while the host ID determines to which host on the network the packets are delivered. Structure An IP address is made up of four parts, written in dotted decimal notation (for example, 192.168.1.1). Each of these four parts is known as an octet. An octet is an eight-digit binary number (for example 11000000, which is 192 in decimal notation). Therefore, each octet has a possible range of 00000000 to 11111111 in binary, or 0 to 255 in decimal. The following figure shows an example IP address in which the first three octets (192.168.1) are the network number, and the fourth octet (16) is the host ID. NBG-418N Users Guide 147 Appendix A IP Addresses and Subnetting Figure 108 Network Number and Host ID How much of the IP address is the network number and how much is the host ID varies according to the subnet mask. Subnet Masks A subnet mask is used to determine which bits are part of the network number, and which bits are part of the host ID (using a logical AND operation). The term subnet is short for sub-network. A subnet mask has 32 bits. If a bit in the subnet mask is a 1 then the corresponding bit in the IP address is part of the network number. If a bit in the subnet mask is 0 then the corresponding bit in the IP address is part of the host ID. The following example shows a subnet mask identifying the network number (in bold text) and host ID of an IP address (192.168.1.2 in decimal). Table 59 IP Address Network Number and Host ID Example 3RD OCTET:

(1) 00000001 2ND OCTET:

(168) 10101000 1ST OCTET:

(192) IP Address (Binary) 11000000 4TH OCTET

(2) 00000010 Subnet Mask (Binary) 11111111 11111111 11111111 00000000 Network Number 11000000 10101000 00000001 Host ID 00000010 By convention, subnet masks always consist of a continuous sequence of ones beginning from the leftmost bit of the mask, followed by a continuous sequence of zeros, for a total number of 32 bits. Subnet masks can be referred to by the size of the network number part (the bits with a 1 value). For example, an 8-bit mask means that the first 8 bits of the mask are ones and the remaining 24 bits are zeroes. 148 NBG-418N Users Guide Appendix A IP Addresses and Subnetting Subnet masks are expressed in dotted decimal notation just like IP addresses. The following examples show the binary and decimal notation for 8-bit, 16-bit, 24-bit and 29-bit subnet masks. Table 60 Subnet Masks BINARY 1ST OCTET 11111111 8-bit mask 2ND OCTET 00000000 3RD OCTET 00000000 4TH OCTET DECIMAL 00000000 255.0.0.0 16-bit mask 11111111 11111111 00000000 00000000 255.255.0.0 24-bit mask 11111111 11111111 11111111 00000000 255.255.255.0 29-bit mask 11111111 11111111 11111111 11111000 255.255.255.248 Network Size The size of the network number determines the maximum number of possible hosts you can have on your network. The larger the number of network number bits, the smaller the number of remaining host ID bits. An IP address with host IDs of all zeros is the IP address of the network (192.168.1.0 with a 24-bit subnet mask, for example). An IP address with host IDs of all ones is the broadcast address for that network (192.168.1.255 with a 24-bit subnet mask, for example). As these two IP addresses cannot be used for individual hosts, calculate the maximum number of possible hosts in a network as follows:

Table 61 Maximum Host Numbers SUBNET MASK HOST ID SIZE 8 bits 255.0.0.0 16 bits 255.255.0.0 24 bits 255.255.255.0 29 bits 255.255.255.248 24 bits 16 bits 8 bits 3 bits 224 2 216 2 28 2 23 2 MAXIMUM NUMBER OF HOSTS 16777214 65534 254 6 Since the mask is always a continuous number of ones beginning from the left, followed by a continuous number of zeros for the remainder of the 32 bit mask, you can simply specify the number of ones instead of writing the value of each octet. This is usually specified by writing a /

followed by the number of bits in the mask after the address. For example, 192.1.1.0 /25 is equivalent to saying 192.1.1.0 with subnet mask 255.255.255.128. The following table shows some possible subnet masks using both notations. Table 62 Alternative Subnet Mask Notation SUBNET MASK 255.255.255.0 255.255.255.128 255.255.255.192 ALTERNATIVE NOTATION

/24 LAST OCTET

(BINARY) 0000 0000 LAST OCTET

(DECIMAL) 0

/25

/26 1000 0000 1100 0000 128 192 Notation NBG-418N Users Guide 149 Appendix A IP Addresses and Subnetting Table 62 Alternative Subnet Mask Notation (continued) SUBNET MASK 255.255.255.224 255.255.255.240 255.255.255.248 255.255.255.252 ALTERNATIVE NOTATION

/27 LAST OCTET

(BINARY) 1110 0000 LAST OCTET

(DECIMAL) 224

/28

/29

/30 1111 0000 1111 1000 1111 1100 240 248 252 Subnetting You can use subnetting to divide one network into multiple sub-networks. In the following example a network administrator creates two sub-networks to isolate a group of servers from the rest of the company network for security reasons. In this example, the company network address is 192.168.1.0. The first three octets of the address

(192.168.1) are the network number, and the remaining octet is the host ID, allowing a maximum of 28 2 or 254 possible hosts. The following figure shows the company network before subnetting. Figure 109 Subnetting Example: Before Subnetting You can borrow one of the host ID bits to divide the network 192.168.1.0 into two separate sub-

networks. The subnet mask is now 25 bits (255.255.255.128 or /25). The borrowed host ID bit can have a value of either 0 or 1, allowing two subnets; 192.168.1.0 /25 and 192.168.1.128 /25. The following figure shows the company network after subnetting. There are now two sub-

networks, A and B. 150 NBG-418N Users Guide Figure 110 Subnetting Example: After Subnetting Appendix A IP Addresses and Subnetting In a 25-bit subnet the host ID has 7 bits, so each sub-network has a maximum of 27 2 or 126 possible hosts (a host ID of all zeroes is the subnets address itself, all ones is the subnets broadcast address). 192.168.1.0 with mask 255.255.255.128 is subnet A itself, and 192.168.1.127 with mask 255.255.255.128 is its broadcast address. Therefore, the lowest IP address that can be assigned to an actual host for subnet A is 192.168.1.1 and the highest is 192.168.1.126. Similarly, the host ID range for subnet B is 192.168.1.129 to 192.168.1.254. Example: Four Subnets The previous example illustrated using a 25-bit subnet mask to divide a 24-bit address into two subnets. Similarly, to divide a 24-bit address into four subnets, you need to borrow two host ID bits to give four possible combinations (00, 01, 10 and 11). The subnet mask is 26 bits

(11111111.11111111.11111111.11000000) or 255.255.255.192. Each subnet contains 6 host ID bits, giving 26 - 2 or 62 hosts for each subnet (a host ID of all zeroes is the subnet itself, all ones is the subnets broadcast address). Table 63 Subnet 1 IP/SUBNET MASK NETWORK NUMBER IP Address (Decimal) 192.168.1. IP Address (Binary) 11000000.10101000.00000001. Subnet Mask (Binary) 11111111.11111111.11111111. Subnet Address:

192.168.1.0 Broadcast Address:

192.168.1.63 Lowest Host ID: 192.168.1.1 Highest Host ID: 192.168.1.62 LAST OCTET BIT VALUE 0 00000000 11000000 NBG-418N Users Guide 151 Appendix A IP Addresses and Subnetting Table 64 Subnet 2 IP/SUBNET MASK NETWORK NUMBER IP Address 192.168.1. IP Address (Binary) 11000000.10101000.00000001. Subnet Mask (Binary) 11111111.11111111.11111111. LAST OCTET BIT VALUE 64 01000000 11000000 Subnet Address:

192.168.1.64 Broadcast Address:

192.168.1.127 Table 65 Subnet 3 Lowest Host ID: 192.168.1.65 Highest Host ID: 192.168.1.126 IP/SUBNET MASK NETWORK NUMBER IP Address 192.168.1. IP Address (Binary) 11000000.10101000.00000001. Subnet Mask (Binary) 11111111.11111111.11111111. LAST OCTET BIT VALUE 128 10000000 11000000 Subnet Address:

192.168.1.128 Broadcast Address:

192.168.1.191 Table 66 Subnet 4 Lowest Host ID: 192.168.1.129 Highest Host ID: 192.168.1.190 IP/SUBNET MASK NETWORK NUMBER IP Address 192.168.1. LAST OCTET BIT VALUE 192 IP Address (Binary) 11000000.10101000.00000001. 11000000 Subnet Mask (Binary) 11111111.11111111.11111111. 11000000 Subnet Address:

192.168.1.192 Broadcast Address:

192.168.1.255 Lowest Host ID: 192.168.1.193 Highest Host ID: 192.168.1.254 Example: Eight Subnets Similarly, use a 27-bit mask to create eight subnets (000, 001, 010, 011, 100, 101, 110 and 111). The following table shows IP address last octet values for each subnet. Table 67 Eight Subnets SUBNET ADDRESS 0 SUBNET 1 2 3 4 5 6 32 64 96 128 160 FIRST ADDRESS 1 33 65 97 129 161 LAST ADDRESS 30 BROADCAST ADDRESS 31 62 94 126 158 190 63 95 127 159 191 152 NBG-418N Users Guide Appendix A IP Addresses and Subnetting Table 67 Eight Subnets (continued) SUBNET 7 8 SUBNET ADDRESS 192 224 FIRST ADDRESS 193 225 LAST ADDRESS 222 254 BROADCAST ADDRESS 223 255 Subnet Planning The following table is a summary for subnet planning on a network with a 24-bit network number. Table 68 24-bit Network Number Subnet Planning NO. BORROWED HOST BITS 1 255.255.255.128 (/25) SUBNET MASK NO. SUBNETS 2 4 8 16 32 64 NO. HOSTS PER SUBNET 126 62 30 14 6 2 1 255.255.255.192 (/26) 255.255.255.224 (/27) 255.255.255.240 (/28) 255.255.255.248 (/29) 255.255.255.252 (/30) 255.255.255.254 (/31) 128 2 3 4 5 6 7 The following table is a summary for subnet planning on a network with a 16-bit network number. Table 69 16-bit Network Number Subnet Planning NO. BORROWED HOST BITS 1 SUBNET MASK 255.255.128.0 (/17) 2 3 4 5 6 7 8 9 10 11 12 13 14 15 255.255.192.0 (/18) 255.255.224.0 (/19) 255.255.240.0 (/20) 255.255.248.0 (/21) 255.255.252.0 (/22) 255.255.254.0 (/23) 255.255.255.0 (/24) 255.255.255.128 (/25) 255.255.255.192 (/26) 255.255.255.224 (/27) 255.255.255.240 (/28) 255.255.255.248 (/29) 255.255.255.252 (/30) 255.255.255.254 (/31) NO. SUBNETS 2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768 NO. HOSTS PER SUBNET 32766 16382 8190 4094 2046 1022 510 254 126 62 30 14 6 2 1 NBG-418N Users Guide 153 Appendix A IP Addresses and Subnetting Configuring IP Addresses Where you obtain your network number depends on your particular situation. If the ISP or your network administrator assigns you a block of registered IP addresses, follow their instructions in selecting the IP addresses and the subnet mask. If the ISP did not explicitly give you an IP network number, then most likely you have a single user account and the ISP will assign you a dynamic IP address when the connection is established. If this is the case, it is recommended that you select a network number from 192.168.0.0 to 192.168.255.0. The Internet Assigned Number Authority (IANA) reserved this block of addresses specifically for private use; please do not use any other number unless you are told otherwise. You must also enable Network Address Translation (NAT) on the NBG-418N. Once you have decided on the network number, pick an IP address for your NBG-418N that is easy to remember (for instance, 192.168.1.1) but make sure that no other device on your network is using that IP address. The subnet mask specifies the network number portion of an IP address. Your NBG-418N will compute the subnet mask automatically based on the IP address that you entered. You don't need to change the subnet mask computed by the NBG-418N unless you are instructed to do otherwise. Private IP Addresses Every machine on the Internet must have a unique address. If your networks are isolated from the Internet (running only between two branch offices, for example) you can assign any IP addresses to the hosts without problems. However, the Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of IP addresses specifically for private networks:

10.0.0.0 10.255.255.255 172.16.0.0 172.31.255.255 192.168.0.0 192.168.255.255 You can obtain your IP address from the IANA, from an ISP, or it can be assigned from a private network. If you belong to a small organization and your Internet access is through an ISP, the ISP can provide you with the Internet addresses for your local networks. On the other hand, if you are part of a much larger organization, you should consult your network administrator for the appropriate IP addresses. Regardless of your particular situation, do not create an arbitrary IP address; always follow the guidelines above. For more information on address assignment, please refer to RFC 1597, Address Allocation for Private Internets and RFC 1466, Guidelines for Management of IP Address Space. IP Address Conflicts Each device on a network must have a unique IP address. Devices with duplicate IP addresses on the same network will not be able to access the Internet or other resources. The devices may also be unreachable through the network. Conflicting Computer IP Addresses Example More than one device can not use the same IP address. In the following example computer A has a static (or fixed) IP address that is the same as the IP address that a DHCP server assigns to 154 NBG-418N Users Guide Appendix A IP Addresses and Subnetting computer B which is a DHCP client. Neither can access the Internet. This problem can be solved by assigning a different static IP address to computer A or setting computer A to obtain an IP address automatically. Figure 111 Conflicting Computer IP Addresses Example Conflicting Router IP Addresses Example Since a router connects different networks, it must have interfaces using different network numbers. For example, if a router is set between a LAN and the Internet (WAN), the routers LAN and WAN addresses must be on different subnets. In the following example, the LAN and WAN are on the same subnet. The LAN computers cannot access the Internet because the router cannot route between networks. Figure 112 Conflicting Router IP Addresses Example Conflicting Computer and Router IP Addresses Example More than one device can not use the same IP address. In the following example, the computer and the routers LAN port both use 192.168.1.1 as the IP address. The computer cannot access the Internet. This problem can be solved by assigning a different IP address to the computer or the routers LAN port. NBG-418N Users Guide 155 Appendix A IP Addresses and Subnetting Figure 113 Conflicting Computer and Router IP Addresses Example 156 NBG-418N Users Guide APPENDIX B Pop-up Windows, JavaScripts and Java Permissions In order to use the web configurator you need to allow:

Web browser pop-up windows from your device. JavaScripts (enabled by default). Java permissions (enabled by default). Note: The screens used below belong to Internet Explorer version 6, 7 and 8. Screens for other Internet Explorer versions may vary. Internet Explorer Pop-up Blockers You may have to disable pop-up blocking to log into your device. Either disable pop-up blocking (enabled by default in Windows XP SP (Service Pack) 2) or allow pop-up blocking and create an exception for your devices IP address. Disable Pop-up Blockers 1 1 2 In Internet Explorer, select Tools, Pop-up Blocker and then select Turn Off Pop-up Blocker. Figure 114 Pop-up Blocker You can also check if pop-up blocking is disabled in the Pop-up Blocker section in the Privacy tab. In Internet Explorer, select Tools, Internet Options, Privacy. Clear the Block pop-ups check box in the Pop-up Blocker section of the screen. This disables any web pop-up blockers you may have enabled. NBG-418N Users Guide 157 Appendix B Pop-up Windows, JavaScripts and Java Permissions Figure 115 Internet Options: Privacy 3 Click Apply to save this setting. Enable Pop-up Blockers with Exceptions Alternatively, if you only want to allow pop-up windows from your device, see the following steps. 1 2 In Internet Explorer, select Tools, Internet Options and then the Privacy tab. Select Settingsto open the Pop-up Blocker Settings screen. 158 NBG-418N Users Guide Appendix B Pop-up Windows, JavaScripts and Java Permissions Figure 116 Internet Options: Privacy 3 4 Type the IP address of your device (the web page that you do not want to have blocked) with the prefix http://. For example, http://192.168.167.1. Click Add to move the IP address to the list of Allowed sites. Figure 117 Pop-up Blocker Settings NBG-418N Users Guide 159 Appendix B Pop-up Windows, JavaScripts and Java Permissions 5 6 Click Close to return to the Privacy screen. Click Apply to save this setting. JavaScripts If pages of the web configurator do not display properly in Internet Explorer, check that JavaScripts are allowed. 1 In Internet Explorer, click Tools, Internet Options and then the Security tab. Figure 118 Internet Options: Security 2 3 Click the Custom Level... button. Scroll down to Scripting. 4 Under Active scripting make sure that Enable is selected (the default). 5 Under Scripting of Java applets make sure that Enable is selected (the default). 6 Click OK to close the window. 160 NBG-418N Users Guide Appendix B Pop-up Windows, JavaScripts and Java Permissions Figure 119 Security Settings - Java Scripting Java Permissions 1 2 3 From Internet Explorer, click Tools, Internet Options and then the Security tab. Click the Custom Level... button. Scroll down to Microsoft VM. 4 Under Java permissions make sure that a safety level is selected. 5 Click OK to close the window. NBG-418N Users Guide 161 Appendix B Pop-up Windows, JavaScripts and Java Permissions Figure 120 Security Settings - Java JAVA (Sun) 1 From Internet Explorer, click Tools, Internet Options and then the Advanced tab. 2 Make sure that Use Java 2 for <applet> under Java (Sun) is selected. 3 Click OK to close the window. Figure 121 Java (Sun) 162 NBG-418N Users Guide Appendix B Pop-up Windows, JavaScripts and Java Permissions Mozilla Firefox Mozilla Firefox 2.0 screens are used here. Screens for other versions may vary slightly. The steps below apply to Mozilla Firefox 3.0 as well. You can enable Java, Javascripts and pop-ups in one screen. Click Tools, then click Options in the screen that appears. Figure 122 Mozilla Firefox: TOOLS > Options Click Content to show the screen below. Select the check boxes as shown in the following screen. Figure 123 Mozilla Firefox Content Security NBG-418N Users Guide 163 Appendix B Pop-up Windows, JavaScripts and Java Permissions Opera Opera 10 screens are used here. Screens for other versions may vary slightly. Allowing Pop-Ups From Opera, click Tools, then Preferences. In the General tab, go to Choose how you prefer to handle pop-ups and select Open all pop-ups. Figure 124 Opera: Allowing Pop-Ups Enabling Java From Opera, click Tools, then Preferences. In the Advanced tab, select Content from the left-

side menu. Select the check boxes as shown in the following screen. 164 NBG-418N Users Guide Appendix B Pop-up Windows, JavaScripts and Java Permissions Figure 125 Opera: Enabling Java To customize JavaScript behavior in the Opera browser, click JavaScript Options. Figure 126 Opera: JavaScript Options Select the items you want Operas JavaScript to apply. NBG-418N Users Guide 165 Appendix B Pop-up Windows, JavaScripts and Java Permissions 166 NBG-418N Users Guide APPENDIX C Setting Up Your Computers IP Address Note: Your specific NBG-418N may not support all of the operating systems described in this appendix. See the product specifications for more information about which operating systems are supported. This appendix shows you how to configure the IP settings on your computer in order for it to be able to communicate with the other devices on your network. Windows Vista/XP/2000, Mac OS 9/

OS X, and all versions of UNIX/LINUX include the software components you need to use TCP/IP on your computer. If you manually assign IP information instead of using a dynamic IP, make sure that your networks computers have IP addresses that place them in the same subnet. In this appendix, you can set up an IP address for:

Windows XP/NT/2000 on page 167 Windows Vista on page 171 Windows 7 on page 175 Mac OS X: 10.3 and 10.4 on page 179 Mac OS X: 10.5 and 10.6 on page 182 Linux: Ubuntu 8 (GNOME) on page 185 Linux: openSUSE 10.3 (KDE) on page 189 Windows XP/NT/2000 The following example uses the default Windows XP display theme but can also apply to Windows 2000 and Windows NT. 1 Click Start > Control Panel. NBG-418N Users Guide 167 Appendix C Setting Up Your Computers IP Address 2 In the Control Panel, click the Network Connections icon. 3 Right-click Local Area Connection and then select Properties. 4 On the General tab, select Internet Protocol (TCP/IP) and then click Properties. 168 NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address 5 The Internet Protocol TCP/IP Properties window opens. NBG-418N Users Guide 169 Appendix C Setting Up Your Computers IP Address 6 7 8 Select Obtain an IP address automatically if your network administrator or ISP assigns your IP address dynamically. Select Use the following IP Address and fill in the IP address, Subnet mask, and Default gateway fields if you have a static IP address that was assigned to you by your network administrator or ISP. You may also have to enter a Preferred DNS server and an Alternate DNS server, if that information was provided. Click OK to close the Internet Protocol (TCP/IP) Properties window. Click OK to close the Local Area Connection Properties window. Verifying Settings 1 2 170 Click Start > All Programs > Accessories > Command Prompt. In the Command Prompt window, type "ipconfig" and then press [ENTER]. You can also go to Start > Control Panel > Network Connections, right-click a network connection, click Status and then click the Support tab to view your IP address and connection information. NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address Windows Vista This section shows screens from Windows Vista Professional. 1 Click Start > Control Panel. 2 In the Control Panel, click the Network and Internet icon. 3 Click the Network and Sharing Center icon. 4 Click Manage network connections. NBG-418N Users Guide 171 Appendix C Setting Up Your Computers IP Address 5 Right-click Local Area Connection and then select Properties. Note: During this procedure, click Continue whenever Windows displays a screen saying that it needs your permission to continue. 6 Select Internet Protocol Version 4 (TCP/IPv4) and then select Properties. 172 NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address 7 The Internet Protocol Version 4 (TCP/IPv4) Properties window opens. NBG-418N Users Guide 173 Appendix C Setting Up Your Computers IP Address 8 9 Select Obtain an IP address automatically if your network administrator or ISP assigns your IP address dynamically. Select Use the following IP Address and fill in the IP address, Subnet mask, and Default gateway fields if you have a static IP address that was assigned to you by your network administrator or ISP. You may also have to enter a Preferred DNS server and an Alternate DNS server, if that information was provided.Click Advanced. Click OK to close the Internet Protocol (TCP/IP) Properties window. 10 Click OK to close the Local Area Connection Properties window. Verifying Settings 1 2 174 Click Start > All Programs > Accessories > Command Prompt. In the Command Prompt window, type "ipconfig" and then press [ENTER]. You can also go to Start > Control Panel > Network Connections, right-click a network connection, click Status and then click the Support tab to view your IP address and connection information. NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address Windows 7 This section shows screens from Windows 7 Enterprise. 1 Click Start > Control Panel. 2 In the Control Panel, click View network status and tasks under the Network and Internet category. 3 Click Change adapter settings. 4 Double click Local Area Connection and then select Properties. NBG-418N Users Guide 175 Appendix C Setting Up Your Computers IP Address Note: During this procedure, click Continue whenever Windows displays a screen saying that it needs your permission to continue. 5 Select Internet Protocol Version 4 (TCP/IPv4) and then select Properties. 176 NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address 6 The Internet Protocol Version 4 (TCP/IPv4) Properties window opens. NBG-418N Users Guide 177 Appendix C Setting Up Your Computers IP Address 7 8 9 Select Obtain an IP address automatically if your network administrator or ISP assigns your IP address dynamically. Select Use the following IP Address and fill in the IP address, Subnet mask, and Default gateway fields if you have a static IP address that was assigned to you by your network administrator or ISP. You may also have to enter a Preferred DNS server and an Alternate DNS server, if that information was provided. Click Advanced if you want to configure advanced settings for IP, DNS and WINS. Click OK to close the Internet Protocol (TCP/IP) Properties window. Click OK to close the Local Area Connection Properties window. Verifying Settings Click Start > All Programs > Accessories > Command Prompt. In the Command Prompt window, type "ipconfig" and then press [ENTER]. The IP settings are displayed as follows. 1 2 3 178 NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address Mac OS X: 10.3 and 10.4 The screens in this section are from Mac OS X 10.4 but can also apply to 10.3. 1 Click Apple > System Preferences. 2 In the System Preferences window, click the Network icon. NBG-418N Users Guide 179 Appendix C Setting Up Your Computers IP Address 3 When the Network preferences pane opens, select Built-in Ethernet from the network connection type list, and then click Configure. 4 For dynamically assigned settings, select Using DHCP from the Configure IPv4 list in the TCP/IP tab. 180 NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address 5 For statically assigned settings, do the following:

From the Configure IPv4 list, select Manually. In the IP Address field, type your IP address. In the Subnet Mask field, type your subnet mask. In the Router field, type the IP address of your device. 6 Click Apply Now and close the window. Verifying Settings Check your TCP/IP properties by clicking Applications > Utilities > Network Utilities, and then selecting the appropriate Network Interface from the Info tab. NBG-418N Users Guide 181 Appendix C Setting Up Your Computers IP Address Figure 127 Mac OS X 10.4: Network Utility Mac OS X: 10.5 and 10.6 The screens in this section are from Mac OS X 10.5 but can also apply to 10.6. 1 Click Apple > System Preferences. 2 In System Preferences, click the Network icon. 182 NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address 3 When the Network preferences pane opens, select Ethernet from the list of available connection types. 4 5 From the Configure list, select Using DHCP for dynamically assigned settings. For statically assigned settings, do the following:

From the Configure list, select Manually. NBG-418N Users Guide 183 Appendix C Setting Up Your Computers IP Address In the IP Address field, enter your IP address. In the Subnet Mask field, enter your subnet mask. In the Router field, enter the IP address of your NBG-418N. 6 Click Apply and close the window. Verifying Settings Check your TCP/IP properties by clicking Applications > Utilities > Network Utilities, and then selecting the appropriate Network interface from the Info tab. 184 NBG-418N Users Guide Figure 128 Mac OS X 10.5: Network Utility Appendix C Setting Up Your Computers IP Address Linux: Ubuntu 8 (GNOME) This section shows you how to configure your computers TCP/IP settings in the GNU Object Model Environment (GNOME) using the Ubuntu 8 Linux distribution. The procedure, screens and file locations may vary depending on your specific distribution, release version, and individual configuration. The following screens use the default Ubuntu 8 installation. Note: Make sure you are logged in as the root administrator. Follow the steps below to configure your computer IP address in GNOME:

1 Click System > Administration > Network. 2 When the Network Settings window opens, click Unlock to open the Authenticate window. (By default, the Unlock button is greyed out until clicked.) You cannot make changes to your configuration unless you first enter your admin password. NBG-418N Users Guide 185 Appendix C Setting Up Your Computers IP Address 3 In the Authenticate window, enter your admin account name and password then click the Authenticate button. 4 In the Network Settings window, select the connection that you want to configure, then click Properties. 186 NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address 5 The Properties dialog box opens. In the Configuration list, select Automatic Configuration (DHCP) if you have a dynamic IP address. In the Configuration list, select Static IP address if you have a static IP address. Fill in the IP address, Subnet mask, and Gateway address fields. 6 7 Click OK to save the changes and close the Properties dialog box and return to the Network Settings screen. If you know your DNS server IP address(es), click the DNS tab in the Network Settings window and then enter the DNS server information in the fields provided. NBG-418N Users Guide 187 Appendix C Setting Up Your Computers IP Address 8 Click the Close button to apply the changes. Verifying Settings Check your TCP/IP properties by clicking System > Administration > Network Tools, and then selecting the appropriate Network device from the Devices tab. The Interface Statistics column shows data if your connection is working properly. 188 NBG-418N Users Guide Figure 129 Ubuntu 8: Network Tools Appendix C Setting Up Your Computers IP Address Linux: openSUSE 10.3 (KDE) This section shows you how to configure your computers TCP/IP settings in the K Desktop Environment (KDE) using the openSUSE 10.3 Linux distribution. The procedure, screens and file locations may vary depending on your specific distribution, release version, and individual configuration. The following screens use the default openSUSE 10.3 installation. Note: Make sure you are logged in as the root administrator. Follow the steps below to configure your computer IP address in the KDE:

1 Click K Menu > Computer > Administrator Settings (YaST). NBG-418N Users Guide 189 Appendix C Setting Up Your Computers IP Address 2 When the Run as Root - KDE su dialog opens, enter the admin password and click OK. 3 When the YaST Control Center window opens, select Network Devices and then click the Network Card icon. 190 NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address 4 When the Network Settings window opens, click the Overview tab, select the appropriate connection Name from the list, and then click the Configure button. 5 When the Network Card Setup window opens, click the Address tab NBG-418N Users Guide 191 Appendix C Setting Up Your Computers IP Address Figure 130 openSUSE 10.3: Network Card Setup 6 7 8 Select Dynamic Address (DHCP) if you have a dynamic IP address. Select Statically assigned IP Address if you have a static IP address. Fill in the IP address, Subnet mask, and Hostname fields. Click Next to save the changes and close the Network Card Setup window. If you know your DNS server IP address(es), click the Hostname/DNS tab in Network Settings and then enter the DNS server information in the fields provided. 192 NBG-418N Users Guide Appendix C Setting Up Your Computers IP Address 9 Click Finish to save your settings and close the window. Verifying Settings Click the KNetwork Manager icon on the Task bar to check your TCP/IP properties. From the Options sub-menu, select Show Connection Information. Figure 131 openSUSE 10.3: KNetwork Manager When the Connection Status - KNetwork Manager window opens, click the Statistics tab to see if your connection is working properly. NBG-418N Users Guide 193 Appendix C Setting Up Your Computers IP Address Figure 132 openSUSE: Connection Status - KNetwork Manager 194 NBG-418N Users Guide APPENDIX D Wireless LANs Wireless LAN Topologies This section discusses ad-hoc and infrastructure wireless LAN topologies. Ad-hoc Wireless LAN Configuration The simplest WLAN configuration is an independent (Ad-hoc) WLAN that connects a set of computers with wireless adapters (A, B, C). Any time two or more wireless adapters are within range of each other, they can set up an independent network, which is commonly referred to as an ad-hoc network or Independent Basic Service Set (IBSS). The following diagram shows an example of notebook computers using wireless adapters to form an ad-hoc wireless LAN. Figure 133 Peer-to-Peer Communication in an Ad-hoc Network BSS A Basic Service Set (BSS) exists when all communications between wireless clients or between a wireless client and a wired network client go through one access point (AP). Intra-BSS traffic is traffic between wireless clients in the BSS. When Intra-BSS is enabled, wireless client A and B can access the wired network and communicate with each other. When Intra-BSS is disabled, wireless client A and B can still access the wired network but cannot communicate with each other. NBG-418N Users Guide 195 Appendix D Wireless LANs Figure 134 Basic Service Set ESS An Extended Service Set (ESS) consists of a series of overlapping BSSs, each containing an access point, with each access point connected together by a wired network. This wired connection between APs is called a Distribution System (DS). This type of wireless LAN topology is called an Infrastructure WLAN. The Access Points not only provide communication with the wired network but also mediate wireless network traffic in the immediate neighborhood. An ESSID (ESS IDentification) uniquely identifies each ESS. All access points and their associated wireless clients within the same ESS must have the same ESSID in order to communicate. 196 NBG-418N Users Guide Figure 135 Infrastructure WLAN Appendix D Wireless LANs Channel RTS/CTS A channel is the radio frequency(ies) used by wireless devices to transmit and receive data. Channels available depend on your geographical area. You may have a choice of channels (for your region) so you should use a channel different from an adjacent AP (access point) to reduce interference. Interference occurs when radio signals from different access points overlap causing interference and degrading performance. Adjacent channels partially overlap however. To avoid interference due to overlap, your AP should be on a channel at least five channels away from a channel that an adjacent AP is using. For example, if your region has 11 channels and an adjacent AP is using channel 1, then you need to select a channel between 6 or 11. A hidden node occurs when two stations are within range of the same access point, but are not within range of each other. The following figure illustrates a hidden node. Both stations (STA) are within range of the access point (AP) or wireless gateway, but out-of-range of each other, so they cannot "hear" each other, that is they do not know if the channel is currently being used. Therefore, they are considered hidden from each other. NBG-418N Users Guide 197 Appendix D Wireless LANs Figure 136 RTS/CTS When station A sends data to the AP, it might not know that the station B is already using the channel. If these two stations send data at the same time, collisions may occur when both sets of data arrive at the AP at the same time, resulting in a loss of messages for both stations. RTS/CTS is designed to prevent collisions due to hidden nodes. An RTS/CTS defines the biggest size data frame you can send before an RTS (Request To Send)/CTS (Clear to Send) handshake is invoked. When a data frame exceeds the RTS/CTS value you set (between 0 to 2432 bytes), the station that wants to transmit this frame must first send an RTS (Request To Send) message to the AP for permission to send it. The AP then responds with a CTS (Clear to Send) message to all other stations within its range to notify them to defer their transmission. It also reserves and confirms with the requesting station the time frame for the requested transmission. Stations can send frames smaller than the specified RTS/CTS directly to the AP without the RTS

(Request To Send)/CTS (Clear to Send) handshake. You should only configure RTS/CTS if the possibility of hidden nodes exists on your network and the "cost" of resending large frames is more than the extra network overhead involved in the RTS

(Request To Send)/CTS (Clear to Send) handshake. If the RTS/CTS value is greater than the Fragmentation Threshold value (see next), then the RTS (Request To Send)/CTS (Clear to Send) handshake will never occur as data frames will be fragmented before they reach RTS/CTS size. Note: Enabling the RTS Threshold causes redundant network overhead that could negatively affect the throughput performance instead of providing a remedy. Fragmentation Threshold A Fragmentation Threshold is the maximum data fragment size (between 256 and 2432 bytes) that can be sent in the wireless network before the AP will fragment the packet into smaller data frames. A large Fragmentation Threshold is recommended for networks not prone to interference while you should set a smaller threshold for busy networks or networks that are prone to interference. If the Fragmentation Threshold value is smaller than the RTS/CTS value (see previously) you set then the RTS (Request To Send)/CTS (Clear to Send) handshake will never occur as data frames will be fragmented before they reach RTS/CTS size. 198 NBG-418N Users Guide Appendix D Wireless LANs Preamble Type Preamble is used to signal that data is coming to the receiver. Short and long refer to the length of the synchronization field in a packet. Short preamble increases performance as less time sending preamble means more time for sending data. All IEEE 802.11 compliant wireless adapters support long preamble, but not all support short preamble. Use long preamble if you are unsure what preamble mode other wireless devices on the network support, and to provide more reliable communications in busy wireless networks. Use short preamble if you are sure all wireless devices on the network support it, and to provide more efficient communications. Use the dynamic setting to automatically use short preamble when all wireless devices on the network support it, otherwise the NBG-418N uses long preamble. Note: The wireless devices MUST use the same preamble mode in order to communicate. IEEE 802.11g Wireless LAN IEEE 802.11g is fully compatible with the IEEE 802.11b standard. This means an IEEE 802.11b adapter can interface directly with an IEEE 802.11g access point (and vice versa) at 11 Mbps or lower depending on range. IEEE 802.11g has several intermediate rate steps between the maximum and minimum data rates. The IEEE 802.11g data rate and modulation are as follows:

Table 70 IEEE 802.11g DATA RATE (MBPS) MODULATION 1 DBPSK (Differential Binary Phase Shift Keyed) 2 5.5 / 11 6/9/12/18/24/36/48/

54 DQPSK (Differential Quadrature Phase Shift Keying) CCK (Complementary Code Keying) OFDM (Orthogonal Frequency Division Multiplexing) Wireless Security Overview Wireless security is vital to your network to protect wireless communication between wireless clients, access points and the wired network. Wireless security methods available on the NBG-418N are data encryption, wireless client authentication, restricting access by device MAC address and hiding the NBG-418N identity. NBG-418N Users Guide 199 Appendix D Wireless LANs The following figure shows the relative effectiveness of these wireless security methods available on your NBG-418N. Table 71 Wireless Security Levels SECURITY LEVEL Least Secure SECURITY TYPE Unique SSID (Default) Unique SSID with Hide SSID Enabled MAC Address Filtering WEP Encryption IEEE802.1x EAP with RADIUS Server Authentication Wi-Fi Protected Access (WPA) WPA2 Most Secure Note: You must enable the same wireless security settings on the NBG-418N and on all wireless clients that you want to associate with it. IEEE 802.1x In June 2001, the IEEE 802.1x standard was designed to extend the features of IEEE 802.11 to support extended authentication as well as providing additional accounting and control features. It is supported by Windows XP and a number of network devices. Some advantages of IEEE 802.1x are:

User based identification that allows for roaming. Support for RADIUS (Remote Authentication Dial In User Service, RFC 2138, 2139) for centralized user profile and accounting management on a network RADIUS server. Support for EAP (Extensible Authentication Protocol, RFC 2486) that allows additional authentication methods to be deployed with no changes to the access point or the wireless clients. RADIUS RADIUS is based on a client-server model that supports authentication, authorization and accounting. The access point is the client and the server is the RADIUS server. The RADIUS server handles the following tasks:

Authentication Determines the identity of the users. Authorization Determines the network services available to authenticated users once they are connected to the network. Accounting Keeps track of the clients network activity. 200 NBG-418N Users Guide Appendix D Wireless LANs RADIUS is a simple package exchange in which your AP acts as a message relay between the wireless client and the network RADIUS server. Types of RADIUS Messages The following types of RADIUS messages are exchanged between the access point and the RADIUS server for user authentication:

Access-Request Sent by an access point requesting authentication. Access-Reject Sent by a RADIUS server rejecting access. Access-Accept Sent by a RADIUS server allowing access. Access-Challenge Sent by a RADIUS server requesting more information in order to allow access. The access point sends a proper response from the user and then sends another Access-Request message. The following types of RADIUS messages are exchanged between the access point and the RADIUS server for user accounting:

Accounting-Request Sent by the access point requesting accounting. Accounting-Response Sent by the RADIUS server to indicate that it has started or stopped accounting. In order to ensure network security, the access point and the RADIUS server use a shared secret key, which is a password, they both know. The key is not sent over the network. In addition to the shared key, password information exchanged is also encrypted to protect the network from unauthorized access. Types of EAP Authentication This section discusses some popular authentication types: EAP-MD5, EAP-TLS, EAP-TTLS, PEAP and LEAP. Your wireless LAN device may not support all authentication types. EAP (Extensible Authentication Protocol) is an authentication protocol that runs on top of the IEEE 802.1x transport mechanism in order to support multiple types of user authentication. By using EAP to interact with an EAP-compatible RADIUS server, an access point helps a wireless station and a RADIUS server perform authentication. The type of authentication you use depends on the RADIUS server and an intermediary AP(s) that supports IEEE 802.1x. For EAP-TLS authentication type, you must first have a wired connection to the network and obtain the certificate(s) from a certificate authority (CA). A certificate (also called digital IDs) can be used to authenticate users and a CA issues certificates and guarantees the identity of each certificate owner. NBG-418N Users Guide 201 Appendix D Wireless LANs EAP-MD5 (Message-Digest Algorithm 5) MD5 authentication is the simplest one-way authentication method. The authentication server sends a challenge to the wireless client. The wireless client proves that it knows the password by encrypting the password with the challenge and sends back the information. Password is not sent in plain text. However, MD5 authentication has some weaknesses. Since the authentication server needs to get the plaintext passwords, the passwords must be stored. Thus someone other than the authentication server may access the password file. In addition, it is possible to impersonate an authentication server as MD5 authentication method does not perform mutual authentication. Finally, MD5 authentication method does not support data encryption with dynamic session key. You must configure WEP encryption keys for data encryption. EAP-TLS (Transport Layer Security) With EAP-TLS, digital certifications are needed by both the server and the wireless clients for mutual authentication. The server presents a certificate to the client. After validating the identity of the server, the client sends a different certificate to the server. The exchange of certificates is done in the open before a secured tunnel is created. This makes user identity vulnerable to passive attacks. A digital certificate is an electronic ID card that authenticates the senders identity. However, to implement EAP-TLS, you need a Certificate Authority (CA) to handle certificates, which imposes a management overhead. EAP-TTLS (Tunneled Transport Layer Service) EAP-TTLS is an extension of the EAP-TLS authentication that uses certificates for only the server-

side authentications to establish a secure connection. Client authentication is then done by sending username and password through the secure connection, thus client identity is protected. For client authentication, EAP-TTLS supports EAP methods and legacy authentication methods such as PAP, CHAP, MS-CHAP and MS-CHAP v2. PEAP (Protected EAP) Like EAP-TTLS, server-side certificate authentication is used to establish a secure connection, then use simple username and password methods through the secured connection to authenticate the clients, thus hiding client identity. However, PEAP only supports EAP methods, such as EAP-MD5, EAP-MSCHAPv2 and EAP-GTC (EAP-Generic Token Card), for client authentication. EAP-GTC is implemented only by Cisco. LEAP LEAP (Lightweight Extensible Authentication Protocol) is a Cisco implementation of IEEE 802.1x. Dynamic WEP Key Exchange The AP maps a unique key that is generated with the RADIUS server. This key expires when the wireless connection times out, disconnects or reauthentication times out. A new WEP key is generated each time reauthentication is performed. 202 NBG-418N Users Guide Appendix D Wireless LANs If this feature is enabled, it is not necessary to configure a default encryption key in the wireless security configuration screen. You may still configure and store keys, but they will not be used while dynamic WEP is enabled. Note: EAP-MD5 cannot be used with Dynamic WEP Key Exchange For added security, certificate-based authentications (EAP-TLS, EAP-TTLS and PEAP) use dynamic keys for data encryption. They are often deployed in corporate environments, but for public deployment, a simple user name and password pair is more practical. The following table is a comparison of the features of authentication types. Table 72 Comparison of EAP Authentication Types EAP-TLS Yes EAP-MD5 No Mutual Authentication EAP-TTLS Yes PEAP Yes Optional Optional Yes Yes Yes Yes LEAP Yes No No Yes Yes Yes Yes Strong Strong Strong Moderate Hard No Moderate Moderate Moderate Yes Yes No Certificate Client Certificate Server Dynamic Key Exchange Credential Integrity Deployment Difficulty No No No None Easy Client Identity Protection No WPA and WPA2 Wi-Fi Protected Access (WPA) is a subset of the IEEE 802.11i standard. WPA2 (IEEE 802.11i) is a wireless security standard that defines stronger encryption, authentication and key management than WPA. Key differences between WPA or WPA2 and WEP are improved data encryption and user authentication. If both an AP and the wireless clients support WPA2 and you have an external RADIUS server, use WPA2 for stronger data encryption. If you don't have an external RADIUS server, you should use WPA2-PSK (WPA2-Pre-Shared Key) that only requires a single (identical) password entered into each access point, wireless gateway and wireless client. As long as the passwords match, a wireless client will be granted access to a WLAN. If the AP or the wireless clients do not support WPA2, just use WPA or WPA-PSK depending on whether you have an external RADIUS server or not. Select WEP only when the AP and/or wireless clients do not support WPA or WPA2. WEP is less secure than WPA or WPA2. Encryption WPA improves data encryption by using Temporal Key Integrity Protocol (TKIP), Message Integrity Check (MIC) and IEEE 802.1x. WPA2 also uses TKIP when required for compatibility reasons, but offers stronger encryption than TKIP with Advanced Encryption Standard (AES) in the Counter mode with Cipher block chaining Message authentication code Protocol (CCMP). TKIP uses 128-bit keys that are dynamically generated and distributed by the authentication server. AES (Advanced Encryption Standard) is a block cipher that uses a 256-bit mathematical algorithm NBG-418N Users Guide 203 Appendix D Wireless LANs called Rijndael. They both include a per-packet key mixing function, a Message Integrity Check

(MIC) named Michael, an extended initialization vector (IV) with sequencing rules, and a re-keying mechanism. WPA and WPA2 regularly change and rotate the encryption keys so that the same encryption key is never used twice. The RADIUS server distributes a Pairwise Master Key (PMK) key to the AP that then sets up a key hierarchy and management system, using the PMK to dynamically generate unique data encryption keys to encrypt every data packet that is wirelessly communicated between the AP and the wireless clients. This all happens in the background automatically. The Message Integrity Check (MIC) is designed to prevent an attacker from capturing data packets, altering them and resending them. The MIC provides a strong mathematical function in which the receiver and the transmitter each compute and then compare the MIC. If they do not match, it is assumed that the data has been tampered with and the packet is dropped. By generating unique data encryption keys for every data packet and by creating an integrity checking mechanism (MIC), with TKIP and AES it is more difficult to decrypt data on a Wi-Fi network than WEP and difficult for an intruder to break into the network. The encryption mechanisms used for WPA(2) and WPA(2)-PSK are the same. The only difference between the two is that WPA(2)-PSK uses a simple common password, instead of user-specific credentials. The common-password approach makes WPA(2)-PSK susceptible to brute-force password-guessing attacks but its still an improvement over WEP as it employs a consistent, single, alphanumeric password to derive a PMK which is used to generate unique temporal encryption keys. This prevent all wireless devices sharing the same encryption keys. (a weakness of WEP) User Authentication WPA and WPA2 apply IEEE 802.1x and Extensible Authentication Protocol (EAP) to authenticate wireless clients using an external RADIUS database. WPA2 reduces the number of key exchange messages from six to four (CCMP 4-way handshake) and shortens the time required to connect to a network. Other WPA2 authentication features that are different from WPA include key caching and pre-authentication. These two features are optional and may not be supported in all wireless devices. Key caching allows a wireless client to store the PMK it derived through a successful authentication with an AP. The wireless client uses the PMK when it tries to connect to the same AP and does not need to go with the authentication process again. Pre-authentication enables fast roaming by allowing the wireless client (already connecting to an AP) to perform IEEE 802.1x authentication with another AP before connecting to it. Wireless Client WPA Supplicants A wireless client supplicant is the software that runs on an operating system instructing the wireless client how to use WPA. At the time of writing, the most widely available supplicant is the WPA patch for Windows XP, Funk Software's Odyssey client. The Windows XP patch is a free download that adds WPA capability to Windows XP's built-in "Zero Configuration" wireless client. However, you must run Windows XP to use it. 204 NBG-418N Users Guide Appendix D Wireless LANs WPA(2) with RADIUS Application Example To set up WPA(2), you need the IP address of the RADIUS server, its port number (default is 1812), and the RADIUS shared secret. A WPA(2) application example with an external RADIUS server looks as follows. "A" is the RADIUS server. "DS" is the distribution system. 1 2 3 4 The AP passes the wireless client's authentication request to the RADIUS server. The RADIUS server then checks the user's identification against its database and grants or denies network access accordingly. A 256-bit Pairwise Master Key (PMK) is derived from the authentication process by the RADIUS server and the client. The RADIUS server distributes the PMK to the AP. The AP then sets up a key hierarchy and management system, using the PMK to dynamically generate unique data encryption keys. The keys are used to encrypt every data packet that is wirelessly communicated between the AP and the wireless clients. Figure 137 WPA(2) with RADIUS Application Example WPA(2)-PSK Application Example A WPA(2)-PSK application looks as follows. 1 2 3 First enter identical passwords into the AP and all wireless clients. The Pre-Shared Key (PSK) must consist of between 8 and 63 ASCII characters or 64 hexadecimal characters (including spaces and symbols). The AP checks each wireless client's password and allows it to join the network only if the password matches. The AP and wireless clients generate a common PMK (Pairwise Master Key). The key itself is not sent over the network, but is derived from the PSK and the SSID. NBG-418N Users Guide 205 Appendix D Wireless LANs 4 The AP and wireless clients use the TKIP or AES encryption process, the PMK and information exchanged in a handshake to create temporal encryption keys. They use these keys to encrypt data exchanged between them. Figure 138 WPA(2)-PSK Authentication Security Parameters Summary Refer to this table to see what other security parameters you should configure for each authentication method or key management protocol type. MAC address filters are not dependent on how you configure these security features. Table 73 Wireless Security Relational Matrix AUTHENTICATION METHOD/ KEY MANAGEMENT PROTOCOL Open ENCRYPTIO N METHOD None No ENTER MANUAL KEY IEEE 802.1X Disable Enable without Dynamic WEP Key Open WEP No Enable with Dynamic WEP Key Yes Yes Enable without Dynamic WEP Key Disable Shared WEP No Enable with Dynamic WEP Key Yes Yes No Yes No Yes TKIP/AES TKIP/AES TKIP/AES TKIP/AES Enable without Dynamic WEP Key Disable Enable Disable Enable Disable WPA WPA-PSK WPA2 WPA2-PSK Antenna Overview An antenna couples RF signals onto air. A transmitter within a wireless device sends an RF signal to the antenna, which propagates the signal through the air. The antenna also operates in reverse by capturing RF signals from the air. 206 NBG-418N Users Guide Positioning the antennas properly increases the range and coverage area of a wireless LAN. Appendix D Wireless LANs Antenna Characteristics Frequency An antenna in the frequency of 2.4GHz or 5GHz is needed to communicate efficiently in a wireless LAN Radiation Pattern A radiation pattern is a diagram that allows you to visualize the shape of the antennas coverage area. Antenna Gain Antenna gain, measured in dB (decibel), is the increase in coverage within the RF beam width. Higher antenna gain improves the range of the signal for better communications. For an indoor site, each 1 dB increase in antenna gain results in a range increase of approximately 2.5%. For an unobstructed outdoor site, each 1dB increase in gain results in a range increase of approximately 5%. Actual results may vary depending on the network environment. Antenna gain is sometimes specified in dBi, which is how much the antenna increases the signal power compared to using an isotropic antenna. An isotropic antenna is a theoretical perfect antenna that sends out radio signals equally well in all directions. dBi represents the true gain that the antenna provides. Types of Antennas for WLAN There are two types of antennas used for wireless LAN applications. Omni-directional antennas send the RF signal out in all directions on a horizontal plane. The coverage area is torus-shaped (like a donut) which makes these antennas ideal for a room environment. With a wide coverage area, it is possible to make circular overlapping coverage areas with multiple access points. Directional antennas concentrate the RF signal in a beam, like a flashlight does with the light from its bulb. The angle of the beam determines the width of the coverage pattern. Angles typically range from 20 degrees (very directional) to 120 degrees (less directional). Directional antennas are ideal for hallways and outdoor point-to-point applications. Positioning Antennas In general, antennas should be mounted as high as practically possible and free of obstructions. In point-topoint application, position both antennas at the same height and in a direct line of sight to each other to attain the best performance. For omni-directional antennas mounted on a table, desk, and so on, point the antenna up. For omni-directional antennas mounted on a wall or ceiling, point the antenna down. For a single AP application, place omni-directional antennas as close to the center of the coverage area as possible. NBG-418N Users Guide 207 Appendix D Wireless LANs For directional antennas, point the antenna in the direction of the desired coverage area. 208 NBG-418N Users Guide APPENDIX E Common Services The following table lists some commonly-used services and their associated protocols and port numbers. For a comprehensive list of port numbers, ICMP type/code numbers and services, visit the IANA (Internet Assigned Number Authority) web site. Name: This is a short, descriptive name for the service. You can use this one or create a different one, if you like. Protocol: This is the type of IP protocol used by the service. If this is TCP/UDP, then the service uses the same port number with TCP and UDP. If this is USER-DEFINED, the Port(s) is the IP protocol number, not the port number. Port(s): This value depends on the Protocol. Please refer to RFC 1700 for further information about port numbers. If the Protocol is TCP, UDP, or TCP/UDP, this is the IP port number. If the Protocol is USER, this is the IP protocol number. Description: This is a brief explanation of the applications that use this service or the situations in which this service is used. Table 74 Commonly Used Services NAME AH

(IPSEC_TUNNEL) PROTOCOL User-Defined AIM/New-ICQ AUTH BGP BOOTP_CLIENT BOOTP_SERVER CU-SEEME TCP TCP TCP UDP UDP TCP UDP DNS TCP/UDP ESP

(IPSEC_TUNNEL) User-Defined FINGER FTP H.323 HTTP TCP TCP TCP TCP TCP PORT(S) 51 DESCRIPTION The IPSEC AH (Authentication Header) tunneling protocol uses this service. 5190 113 179 68 67 7648 24032 53 50 79 20 21 1720 80 AOLs Internet Messenger service. It is also used as a listening port by ICQ. Authentication protocol used by some servers. Border Gateway Protocol. DHCP Client. DHCP Server. A popular videoconferencing solution from White Pines Software. Domain Name Server, a service that matches web names (for example www.zyxel.com) to IP numbers. The IPSEC ESP (Encapsulation Security Protocol) tunneling protocol uses this service. Finger is a UNIX or Internet related command that can be used to find out if a user is logged on. File Transfer Program, a program to enable fast transfer of files, including large files that may not be possible by e-mail. NetMeeting uses this protocol. Hyper Text Transfer Protocol - a client/server protocol for the world wide web. NBG-418N Users Guide 209 Appendix E Common Services Table 74 Commonly Used Services (continued) NAME HTTPS PROTOCOL TCP PORT(S) 443 User-Defined 1 ICMP ICQ UDP IGMP (MULTICAST) User-Defined IKE IRC UDP TCP/UDP MSN Messenger TCP 4000 2 500 6667 1863 5190 144 2049 119 1 110 1723 512 7070 514 513 107 554 115 25 161 162 User-Defined 47 NEW-ICQ NEWS NFS NNTP PING POP3 PPTP PPTP_TUNNEL

(GRE) RCMD REAL_AUDIO REXEC RLOGIN RTELNET RTSP SFTP SMTP TCP TCP UDP TCP User-Defined TCP TCP TCP TCP TCP TCP TCP TCP/UDP TCP TCP SNMP SNMP-TRAPS TCP/UDP TCP/UDP DESCRIPTION HTTPS is a secured http session often used in e-

commerce. Internet Control Message Protocol is often used for diagnostic or routing purposes. This is a popular Internet chat program. Internet Group Management Protocol is used when sending packets to a specific group of hosts. The Internet Key Exchange algorithm is used for key distribution and management. This is another popular Internet chat program. Microsoft Networks messenger service uses this protocol. An Internet chat program. A protocol for news groups. Network File System - NFS is a client/server distributed file service that provides transparent file sharing for network environments. Network News Transport Protocol is the delivery mechanism for the USENET newsgroup service. Packet INternet Groper is a protocol that sends out ICMP echo requests to test whether or not a remote host is reachable. Post Office Protocol version 3 lets a client computer get e-mail from a POP3 server through a temporary connection (TCP/IP or other). Point-to-Point Tunneling Protocol enables secure transfer of data over public networks. This is the control channel. PPTP (Point-to-Point Tunneling Protocol) enables secure transfer of data over public networks. This is the data channel. Remote Command Service. A streaming audio service that enables real time sound over the web. Remote Execution Daemon. Remote Login. Remote Telnet. The Real Time Streaming (media control) Protocol

(RTSP) is a remote control for multimedia on the Internet. Simple File Transfer Protocol. Simple Mail Transfer Protocol is the message-

exchange standard for the Internet. SMTP enables you to move messages from one e-mail server to another. Simple Network Management Program. Traps for use with the SNMP (RFC:1215). 210 NBG-418N Users Guide Table 74 Commonly Used Services (continued) NAME SQL-NET PROTOCOL TCP PORT(S) 1521 SSH STRM WORKS SYSLOG TACACS TELNET TCP/UDP UDP UDP UDP TCP TFTP UDP 22 1558 514 49 23 69 Appendix E Common Services DESCRIPTION Structured Query Language is an interface to access data on many different types of database systems, including mainframes, midrange systems, UNIX systems and network servers. Secure Shell Remote Login Program. Stream Works Protocol. Syslog allows you to send system logs to a UNIX server. Login Host Protocol used for (Terminal Access Controller Access Control System). Telnet is the login and terminal emulation protocol common on the Internet and in UNIX environments. It operates over TCP/IP networks. Its primary function is to allow users to log into remote host systems. Trivial File Transfer Protocol is an Internet file transfer protocol similar to FTP, but uses the UDP

(User Datagram Protocol) rather than TCP

(Transmission Control Protocol). VDOLIVE TCP 7000 Another videoconferencing solution. NBG-418N Users Guide 211 Appendix E Common Services 212 NBG-418N Users Guide APPENDIX F Legal Information Copyright Copyright 2012 by ZyXEL Communications Corporation. The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval system, translated into any language, or transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written permission of ZyXEL Communications Corporation. Published by ZyXEL Communications Corporation. All rights reserved. Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein. Neither does it convey any license under its patent rights nor the patent rights of others. ZyXEL further reserves the right to make changes in any products described herein without notice. This publication is subject to change without notice. Certifications Federal Communications Commission (FCC) Interference Statement The device complies with Part 15 of FCC rules. Operation is subject to the following two conditions:

This device may not cause harmful interference. This device must accept any interference received, including interference that may cause undesired operations. This device has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this device does cause harmful interference to radio/television reception, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and the receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help. 1 2 3 4 FCC Radiation Exposure Statement This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. IEEE 802.11b, 802.11g or 802.11n (20MHz) operation of this product in the U.S.A. is firmware-limited to channels 1 through 11. IEEE 802.11n (40MHz) operation of this product in the U.S.A. is firmware-limited to channels 3 through 9. To comply with FCC RF exposure compliance requirements, a separation distance of at least 20 cm must be maintained between the antenna of this device and all persons.

Notices Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device has been designed for the WLAN 2.4 GHz network throughout the EC region and Switzerland, with restrictions in France. Ce produit est conu pour les bandes de frquences 2,4 GHz conformment la lgislation Europenne. En France mtropolitaine, suivant les dcisions n03-908 et 03-909 de l'ARCEP, la puissance d'mission ne devra pas dpasser 10 mW (10 dB) dans le cadre d'une installation WiFi en extrieur pour les frquences comprises entre 2454 MHz et 2483,5 MHz. NBG-418N Users Guide 213 Appendix F Legal Information This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numrique de la classe B est conforme la norme NMB-003 du Canada. Viewing Certifications Go to http://www.zyxel.com to view this products documentation and certifications. ZyXEL Limited Warranty ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in material or workmanship for a specific period (the Warranty Period) from the date of purchase. The Warranty Period varies by region. Check with your vendor and/or the authorized ZyXEL local distributor for details about the Warranty Period of this product. During the warranty period, and upon proof of purchase, should the product have indications of failure due to faulty workmanship and/or materials, ZyXEL will, at its discretion, repair or replace the defective products or components without charge for either parts or labor, and to whatever extent it shall deem necessary to restore the product or components to proper operating condition. Any replacement will consist of a new or re-manufactured functionally equivalent product of equal or higher value, and will be solely at the discretion of ZyXEL. This warranty shall not apply if the product has been modified, misused, tampered with, damaged by an act of God, or subjected to abnormal working conditions. Note Repair or replacement, as provided under this warranty, is the exclusive remedy of the purchaser. This warranty is in lieu of all other warranties, express or implied, including any implied warranty of merchantability or fitness for a particular use or purpose. ZyXEL shall in no event be held liable for indirect or consequential damages of any kind to the purchaser. To obtain the services of this warranty, contact your vendor. You may also refer to the warranty policy for the region in which you bought the device at http://www.zyxel.com/web/support_warranty_info.php. Registration Register your product online to receive e-mail notices of firmware upgrades and information at www.zyxel.com for global products, or at www.us.zyxel.com for North American products. Open Source Licenses (all products) This product contains in part some free software distributed under GPL license terms and/or GPL like licenses. Open source licenses are provided with the firmware package. You can download the latest firmware at www.zyxel.com. To obtain the source code covered under those Licenses, please contact support@zyxel.com.tw to get it. Regulatory Information European Union The following information applies if you use the product within the European Union. Declaration of Conformity with Regard to EU Directive 1999/5/EC (R&TTE Directive) Compliance Information for 2.4GHz and 5GHz Wireless Products Relevant to the EU and Other Countries Following the EU Directive 1999/5/EC

(R&TTE Directive)

[Czech]

[Danish]

[German]

[Estonian]

English

[Spanish]

[Greek]

[French]

[Italian]

[Latvian]

ZyXEL tmto prohlauje, e tento zazen je ve shod se zkladnmi poadavky a dalmi pslunmi ustanovenmi smrnice 1999/5/EC. Undertegnede ZyXEL erklrer herved, at flgende udstyr udstyr overholder de vsentlige krav og vrige relevante krav i direktiv 1999/5/EF. Hiermit erklrt ZyXEL, dass sich das Gert Ausstattung in bereinstimmung mit den grundlegenden Anforderungen und den brigen einschlgigen Bestimmungen der Richtlinie 1999/5/EU befindet. Kesolevaga kinnitab ZyXEL seadme seadmed vastavust direktiivi 1999/5/E phinuetele ja nimetatud direktiivist tulenevatele teistele asjakohastele stetele. Hereby, ZyXEL declares that this equipment is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC. Por medio de la presente ZyXEL declara que el equipo cumple con los requisitos esenciales y cualesquiera otras disposiciones aplicables o exigibles de la Directiva 1999/5/CE. ZyXEL 1999/5/C. Par la prsente ZyXEL dclare que l'appareil quipements est conforme aux exigences essentielles et aux autres dispositions pertinentes de la directive 1999/5/EC. Con la presente ZyXEL dichiara che questo attrezzatura conforme ai requisiti essenziali ed alle altre disposizioni pertinenti stabilite dalla direttiva 1999/5/CE. Ar o ZyXEL deklar, ka iekrtas atbilst Direktvas 1999/5/EK btiskajm prasbm un citiem ar to saisttajiem noteikumiem.

[Lithuanian]

iuo ZyXEL deklaruoja, kad is ranga atitinka esminius reikalavimus ir kitas 1999/5/EB Direktyvos nuostatas.

[Dutch]

[Maltese]

Hierbij verklaart ZyXEL dat het toestel uitrusting in overeenstemming is met de essentile eisen en de andere relevante bepalingen van richtlijn 1999/5/EC. Hawnhekk, ZyXEL, jiddikjara li dan tagmir jikkonforma mal-tiijiet essenzjali u ma provvedimenti orajn relevanti li hemm fid-Dirrettiva 1999/5/EC. 214 NBG-418N Users Guide Appendix F Legal Information

[Hungarian]

Alulrott, ZyXEL nyilatkozom, hogy a berendezs megfelel a vonatkoz alapvet kvetelmnyeknek s az 1999/5/EK irnyelv egyb elrsainak.

[Polish]

Niniejszym ZyXEL owiadcza, e sprzt jest zgodny z zasadniczymi wymogami oraz pozostaymi stosownymi postanowieniami Dyrektywy 1999/5/EC.

[Portuguese]

ZyXEL declara que este equipamento est conforme com os requisitos essenciais e outras disposies da Directiva 1999/5/EC.

[Slovenian]

ZyXEL izjavlja, da je ta oprema v skladu z bistvenimi zahtevami in ostalimi relevantnimi doloili direktive 1999/5/EC.

[Slovak]

[Finnish]

[Swedish]

[Bulgarian]

[Icelandic]

[Norwegian]

[Romanian]

ZyXEL tmto vyhlasuje, e zariadenia spa zkladn poiadavky a vetky prslun ustanovenia Smernice 1999/5/

EC. ZyXEL vakuuttaa tten ett laitteet tyyppinen laite on direktiivin 1999/5/EY oleellisten vaatimusten ja sit koskevien direktiivin muiden ehtojen mukainen. Hrmed intygar ZyXEL att denna utrustning str I verensstmmelse med de vsentliga egenskapskrav och vriga relevanta bestmmelser som framgr av direktiv 1999/5/EC. ZyXEL , 1999/5/C. Hr me lsir, ZyXEL v yfir a essi bnaur er samrmi vi grunnkrfur og nnur vieigandi kvi tilskipunar 1999/5/EC. Erklrer herved ZyXEL at dette utstyret er I samsvar med de grunnleggende kravene og andre relevante bestemmelser I direktiv 1999/5/EF. Prin prezenta, ZyXEL declar c acest echipament este n conformitate cu cerinele eseniale i alte prevederi relevante ale Directivei 1999/5/EC. National Restrictions This product may be used in all EU countries (and other countries following the EU directive 1999/5/EC) without any limitation except for the countries mentioned below:

Ce produit peut tre utilis dans tous les pays de lUE (et dans tous les pays ayant transposs la directive 1999/5/CE) sans aucune limitation, except pour les pays mentionns ci-dessous:

Questo prodotto utilizzabile in tutte i paesi EU (ed in tutti gli altri paesi che seguono le direttive EU 1999/5/EC) senza nessuna limitazione, eccetto per i paesii menzionati di seguito:

Das Produkt kann in allen EU Staaten ohne Einschrnkungen eingesetzt werden (sowie in anderen Staaten die der EU Direktive 1995/5/CE folgen) mit Aunahme der folgenden aufgefhrten Staaten:

In the majority of the EU and other European countries, the 2, 4- and 5-GHz bands have been made available for the use of wireless local area networks (LANs). Later in this document you will find an overview of countries inwhich additional restrictions or requirements or both are applicable. The requirements for any country may evolve. ZyXEL recommends that you check with the local authorities for the latest status of their national regulations for both the 2,4- and 5-GHz wireless LANs. The following countries have restrictions and/or requirements in addition to those given in the table labeled Overview of Regulatory Requirements for Wireless LANs:. Overview of Regulatory Requirements for Wireless LANs Frequency Band (MHz) Max Power Level

(EIRP)1 (mW) Indoor ONLY Indoor and Outdoor 2400-2483.5 5150-5350 5470-5725 100 200 1000 V V V Belgium The Belgian Institute for Postal Services and Telecommunications (BIPT) must be notified of any outdoor wireless link having a range exceeding 300 meters. Please check http://www.bipt.be for more details. Draadloze verbindingen voor buitengebruik en met een reikwijdte van meer dan 300 meter dienen aangemeld te worden bij het Belgisch Instituut voor postdiensten en telecommunicatie (BIPT). Zie http://www.bipt.be voor meer gegevens. Les liaisons sans fil pour une utilisation en extrieur dune distance suprieure 300 mtres doivent tre notifies lInstitut Belge des services Postaux et des Tlcommunications (IBPT). Visitez http://www.ibpt.be pour de plus amples dtails. Denmark In Denmark, the band 5150 - 5350 MHz is also allowed for outdoor usage. I Danmark m frekvensbndet 5150 - 5350 ogs anvendes udendrs. France For 2.4 GHz, the output power is restricted to 10 mW EIRP when the product is used outdoors in the band 2454 - 2483.5 MHz. There are no restrictions when used indoors or in other parts of the 2.4 GHz band. Check http://www.arcep.fr/ for more details. NBG-418N Users Guide 215 Appendix F Legal Information Pour la bande 2.4 GHz, la puissance est limite 10 mW en p.i.r.e. pour les quipements utiliss en extrieur dans la bande 2454 -

2483.5 MHz. Il n'y a pas de restrictions pour des utilisations en intrieur ou dans d'autres parties de la bande 2.4 GHz. Consultez http://

www.arcep.fr/ pour de plus amples dtails. R&TTE 1999/5/EC WLAN 2.4 2.4835 GHz IEEE 802.11 b/g/n Location Frequency Range(GHz) Power (EIRP) Indoor (No restrictions) 2.4 2.4835 Outdoor 2.4 2.454 2.454 2.4835 100mW (20dBm) 100mW (20dBm) 10mW (10dBm) Italy This product meets the National Radio Interface and the requirements specified in the National Frequency Allocation Table for Italy. Unless this wireless LAN product is operating within the boundaries of the owner's property, its use requires a general authorization. Please check http://www.sviluppoeconomico.gov.it/ for more details. Questo prodotto conforme alla specifiche di Interfaccia Radio Nazionali e rispetta il Piano Nazionale di ripartizione delle frequenze in Italia. Se non viene installato all 'interno del proprio fondo, l'utilizzo di prodotti Wireless LAN richiede una Autorizzazione Generale. Consultare http://www.sviluppoeconomico.gov.it/ per maggiori dettagli. Latvia The outdoor usage of the 2.4 GHz band requires an authorization from the Electronic Communications Office. Please check http://

www.esd.lv for more details. 2.4 GHz frekvenu joslas izmantoanai rpus telpm nepiecieama atauja no Elektronisko sakaru direkcijas. Vairk informcijas: http://www.esd.lv. Notes:

1. Although Norway, Switzerland and Liechtenstein are not EU member states, the EU Directive 1999/5/EC has also been implemented in those countries. 2. The regulatory limits for maximum output power are specified in EIRP. The EIRP level (in dBm) of a device can be calculated by adding the gain of the antenna used(specified in dBi) to the output power available at the connector (specified in dBm). List of national codes COUNTRY Austria Belgium Cyprus Czech Republic Denmark Estonia Finland France Germany Greece Hungary Ireland Italy Latvia Lithuania Luxembourg Safety Warnings ISO 3166 2 LETTER CODE COUNTRY ISO 3166 2 LETTER CODE AT BE CY CR DK EE FI FR DE GR HU IE IT LV LT LU Malta Netherlands Poland Portugal Slovakia Slovenia Spain Sweden United Kingdom Iceland Liechtenstein Norway Switzerland Bulgaria Romania Turkey MT NL PL PT SK SI ES SE GB IS LI NO CH BG RO TR Do NOT use this product near water, for example, in a wet basement or near a swimming pool. Do NOT expose your device to dampness, dust or corrosive liquids. Do NOT store things on the device. Do NOT install, use, or service this device during a thunderstorm. There is a remote risk of electric shock from lightning. Connect ONLY suitable accessories to the device. Do NOT open the device or unit. Opening or removing covers can expose you to dangerous high voltage points or other risks. ONLY qualified service personnel should service or disassemble this device. Please contact your vendor for further information. Make sure to connect the cables to the correct ports. Place connecting cables carefully so that no one will step on them or stumble over them. Always disconnect all cables from this device before servicing or disassembling. Use ONLY an appropriate power adaptor or cord for your device. 216 NBG-418N Users Guide Appendix F Legal Information Connect the power adaptor or cord to the right supply voltage (for example, 110V AC in North America or 230V AC in Europe). Do NOT allow anything to rest on the power adaptor or cord and do NOT place the product where anyone can walk on the power adaptor or cord. If the power adaptor or cord is damaged, remove it from the power outlet. Do NOT use the device if the power adaptor or cord is damaged as it might cause electrocution. Do NOT attempt to repair the power adaptor or cord. Contact your local vendor to order a new one. Do not use the device outside, and make sure all the connections are indoors. There is a remote risk of electric shock from lightning. Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your device. Antenna Warning! This device meets ETSI and FCC certification requirements when using the included antenna(s). Only use the included antenna(s). If you wall mount your device, make sure that no electrical lines, gas or water pipes will be damaged. Your product is marked with this symbol, which is known as the WEEE mark. WEEE stands for Waste Electronics and Electrical Equipment. It means that used electrical and electronic products should not be mixed with general waste. Used electrical and electronic equipment should be treated separately. NBG-418N Users Guide 217 Appendix F Legal Information 218 NBG-418N Users Guide Index Index reset the factory defaults 134 restore 133 copyright 213 CPU usage 39, 46, 50, 54 CTS (Clear to Send) 198 D Daylight saving 128 DDNS service providers 109 device mode 13, 35 DHCP 40, 97 DHCP server see also Dynamic Host Configuration Protocol DHCP client information 100 DHCP client list 100 DHCP server 94, 97 DHCP table 40, 100 DHCP client information DHCP status disclaimer 213 DNS 30, 99 DNS server see also Domain name system DNS Server 86 DNS server 99 documentation related 2 Domain name 23 vs host name. see also system name Domain Name System 99 Domain Name System. See DNS. duplex setting 40, 46, 50, 54 Dynamic DNS 109 Dynamic Host Configuration Protocol 97 dynamic WEP key exchange 202 DynDNS 109 DynDNS see also DDNS 109 219 A Address Assignment 86 Advanced Encryption Standard See AES. AES 203 Alert 129 alternative subnet mask notation 149 antenna directional 207 gain 207 omni-directional 207 AP (access point) 197 AP Mode menu 42, 47 overview 35 status screen 37, 45, 49, 53 B Backup configuration 133 Basic Service Set, See BSS 195 BSS 195 C CA 202 Certificate Authority See CA. certifications notices 213 viewing 214 Channel 39, 46, 50, 53 channel 69, 197 interference 197 client bridge 13 Configuration backup 133 NBG-418N Users Guide Index E EAP Authentication 201 encryption 70, 203 key 70 WPA compatible 70 ESS 196 ESSID 145 Extended Service Set, See ESS 196 Extended wireless security 24 F Factory LAN defaults 94, 97 FCC interference statement 213 Firewall ICMP packets 113 ZyXEL device firewall 112 firewall stateful inspection 111 Firmware upload 131 file extension using HTTP firmware version 39, 46, 49, 53 fragmentation threshold 198 G General wireless LAN screen 70 Guide Quick Start 2 H hidden node 197 I IANA 154 IBSS 195 220 IEEE 802.11g 199 Independent Basic Service Set See IBSS 195 initialization vector (IV) 204 Internet Assigned Numbers Authority See IANA 154 Internet connection Ethernet PPPoE. see also PPP over Ethernet PPTP WAN connection Internet connection wizard 25 IP Address 95, 104 IP address 30 dynamic IP Pool 98 L LAN 93 IP pool setup 94 LAN overview 93 LAN setup 93 LAN TCP/IP 94 Language 139 Link type 40, 46, 50, 54 Local Area Network 93 Log 129 M MAC 75 MAC address 69, 86 cloning 31, 86 MAC address filter 69 MAC address filtering 75 MAC filter 75 managing the device good habits 14 Media access control 75 Memory usage 39, 46, 50, 54 Message Integrity Check (MIC) 203 NBG-418N Users Guide mode 13 N NAT 101, 104, 154 global 102 how it works 101, 103 inside 102 local 102 outside 102 overview 101 port forwarding 106 see also Network Address Translation server 103 server sets 106 NAT traversal 119 Navigation Panel 42, 47, 51, 54 navigation panel 42, 47, 51, 54 Network Address Translation 101, 104 O operating mode 13 operation mode 35, 137 access point 35 client 36 router 35 universal repeater 36 other documentation 2 overview 13 P Pairwise Master Key (PMK) 204, 205 Point-to-Point Protocol over Ethernet 26, 88 Point-to-Point Tunneling Protocol 27, 90 Pool Size 98 Port forwarding 104, 106 default server 104, 106 example 107 local server 104 port numbers Index services port speed 40, 46, 50, 54 PPPoE 26, 88 benefits 26 dial-up connection see also Point-to-Point Protocol over Ethernet 26 PPTP 27, 90 see also Point-to-Point Tunneling Protocol 27 preamble mode 199 product registration 214 PSK 204 Q Quality of Service (QoS) 78 Quick Start Guide 2 R RADIUS 200 message types 201 messages 201 shared secret key 201 registration product 214 related documentation 2 Remote management 115 and NAT 116 and the firewall 115 limitations 116 system timeout 116 Reset button 19, 134 Reset the device 19 Restore configuration 133 Roaming 76 RTS (Request To Send) 198 threshold 197, 198 RTS/CTS Threshold 68, 76, 77 S safety warnings 216 NBG-418N Users Guide 221 Index Scheduling 81 screw anchor 16 Service Set 72 Service Set IDentification 72, 82, 83 Service Set IDentity. See SSID. SSID 39, 46, 53, 69, 72, 82, 83 stateful inspection firewall 111 Static DHCP 98 subnet 147 Subnet Mask 95 subnet mask 30, 148 subnetting 150 Summary DHCP table 40 Packet statistics 41 Wireless station status 42 Sys Op Mode 137 System General Setup 125 System Name 126 System name 22 vs computer name System restart 134 T TCP/IP configuration 97 Temporal Key Integrity Protocol (TKIP) 203 Time setting 126 U Universal Plug and Play 119 application 119 universal repeater 13 UPnP 119 security issues 119 V VPN 90 222 W wall mounting 16 WAN IP address assignment 29 WAN (Wide Area Network) 85 WAN IP address 29 WAN IP address assignment 30 WAN MAC address 86 warranty 214 note 214 Web Configurator how to access 17 Overview 17 WEP Encryption 74 WEP encryption 73 WEP key 73 Wi-Fi Protected Access 203 Wireless association list 42 wireless channel 145 wireless client WPA supplicants 204 wireless LAN 145 wireless LAN scheduling 81 Wireless LAN wizard 23 Wireless network basic guidelines 68 channel 69 encryption 70 example 67 MAC address filter 69 overview 67 security 69 SSID 69 Wireless security 69 overview 69 type 69 wireless security 145, 199 Wireless tutorial 57 WPS 57 Wizard setup 21 complete 32 Internet connection 25 system information 22 wireless LAN 23 WLAN interference 197 NBG-418N Users Guide Index security parameters 206 WPA 203 key caching 204 pre-authentication 204 user authentication 204 vs WPA-PSK 204 wireless client supplicant 204 with RADIUS application example 205 WPA compatible 70 WPA2 203 user authentication 204 vs WPA2-PSK 204 wireless client supplicant 204 with RADIUS application example 205 WPA2-Pre-Shared Key 203 WPA2-PSK 203, 204 application example 205 WPA-PSK 203, 204 application example 205 WPS 15 WPS button 15 NBG-418N Users Guide 223 Index 224 NBG-418N Users Guide

NBG-418N Wireless N Home Router Default Login Details LAN IP Address User Name Password http://192.168.1.1 admin 1234 Version 1.00 Edition 1, 4/2012 www.zyxel.com www.zyxel.com IMPORTANT!

READ CAREFULLY BEFORE USE. KEEP THIS GUIDE FOR FUTURE REFERENCE. IMPORTANT!

Copyright 2012 ZyXEL Communications Corporation IMPORTANT!

READ CAREFULLY BEFORE USE. KEEP THIS GUIDE FOR FUTURE REFERENCE. Graphics in this book may differ slightly from the product due to differences in operating systems, operating system versions, or if you installed updated firmware/software for your device. Every effort has been made to ensure that the information in this manual is accurate. Related Documentation Quick Start Guide The Quick Start Guide shows how to connect the NBG-418N and configure it using the Web Configurator wizard. 2 NBG-418N Users Guide Contents Overview Contents Overview Users Guide ....................................................................................................................................... 11 Introduction .............................................................................................................................................13 The Web Configurator .............................................................................................................................17 Connection Wizard ..................................................................................................................................21 Modes ....................................................................................................................................................35 Tutorials ..................................................................................................................................................57 Technical Reference ..........................................................................................................................65 Wireless LAN ..........................................................................................................................................67 WAN ........................................................................................................................................................85 LAN .........................................................................................................................................................93 DHCP Server ..........................................................................................................................................97 Network Address Translation ................................................................................................................101 Dynamic DNS ........................................................................................................................................109 Firewall .................................................................................................................................................. 111 Remote Management ............................................................................................................................ 115 Universal Plug-and-Play (UPnP) ........................................................................................................... 119 System ..................................................................................................................................................125 Logs ......................................................................................................................................................129 Tools ......................................................................................................................................................131 Sys OP Mode ........................................................................................................................................137 Language ..............................................................................................................................................139 Troubleshooting ....................................................................................................................................141 NBG-418N Users Guide 3 Contents Overview 4 NBG-418N Users Guide Table of Contents Table of Contents Contents Overview ..............................................................................................................................3 Table of Contents .................................................................................................................................5 Part I: Users Guide ......................................................................................... 11 Chapter 1 Introduction.........................................................................................................................................13 1.1 Overview ...........................................................................................................................................13 1.2 Securing the NBG-418N ...................................................................................................................14 1.3 LEDs .................................................................................................................................................15 1.4 The WPS Button ...............................................................................................................................15 1.5 Wall Mounting ...................................................................................................................................16 Chapter 2 The Web Configurator ........................................................................................................................17 2.1 Overview ...........................................................................................................................................17 2.2 Accessing the Web Configurator .......................................................................................................17 2.3 Resetting the NBG-418N ..................................................................................................................19 2.3.1 Using the RESET Button .........................................................................................................19 Chapter 3 Connection Wizard .............................................................................................................................21 3.1 Wizard Setup .....................................................................................................................................21 3.2 Connection Wizard: STEP 1: System Information ............................................................................22 3.2.1 System Name ..........................................................................................................................22 3.2.2 Domain Name ..........................................................................................................................23 3.3 Connection Wizard: STEP 2: Wireless LAN ......................................................................................23 3.3.1 WPA-PSK or WPA2-PSK Security ...........................................................................................24 3.4 Connection Wizard: STEP 3: Internet Configuration .........................................................................25 3.4.1 Ethernet Connection ................................................................................................................26 3.4.2 PPPoE Connection ..................................................................................................................26 3.4.3 PPTP Connection ....................................................................................................................27 3.4.4 Your IP Address .......................................................................................................................28 3.4.5 WAN IP Address Assignment ..................................................................................................29 3.4.6 IP Address and Subnet Mask ..................................................................................................30 3.4.7 DNS Server Address Assignment ...........................................................................................30 3.4.8 WAN IP and DNS Server Address Assignment .......................................................................30 NBG-418N Users Guide 5 Table of Contents 3.4.9 WAN MAC Address .................................................................................................................31 3.5 Connection Wizard Complete ...........................................................................................................32 Chapter 4 Modes .................................................................................................................................................35 4.1 Overview ...........................................................................................................................................35 4.2 Setting your NBG-418N to Router Mode ...........................................................................................36 4.2.1 Status Screen (Router Mode) ..................................................................................................37 4.2.2 Router Mode Navigation Panel ................................................................................................42 4.3 Setting your NBG-418N to AP Mode .................................................................................................44 4.3.1 Status Screen (AP Mode) ........................................................................................................45 4.3.2 AP Navigation Panel ................................................................................................................47 4.4 Setting your NBG-418N to Universal Repeater Mode .......................................................................48 4.4.1 Status Screen (Universal Repeater Mode) ..............................................................................49 4.4.2 Universal Repeater Navigation Panel ......................................................................................51 4.5 Setting your NBG-418N to Client Bridge Mode .................................................................................52 4.5.1 Status Screen (Client Bridge Mode) ........................................................................................53 4.5.2 Client Bridge Navigation Panel ................................................................................................54 Chapter 5 Tutorials...............................................................................................................................................57 5.1 Overview ...........................................................................................................................................57 5.2 How to Connect to the Internet from an AP ......................................................................................57 5.2.1 Configure Wireless Security Using WPS on both your NBG-418N and Wireless Client .........57 5.3 Enable and Configure Wireless Security without WPS on your NBG-418N .....................................61 Part II: Technical Reference............................................................................ 65 Chapter 6 Wireless LAN.......................................................................................................................................67 6.1 Overview ...........................................................................................................................................67 6.2 What You Can Do .............................................................................................................................68 6.3 What You Should Know ....................................................................................................................69 6.3.1 Wireless Security Overview .....................................................................................................69 6.4 General Wireless LAN Screen .........................................................................................................70 6.4.1 No Security ..............................................................................................................................72 6.4.2 WEP Encryption ......................................................................................................................73 6.4.3 WPA-PSK/WPA2-PSK .............................................................................................................74 6.5 MAC Filter .........................................................................................................................................75 6.6 Wireless LAN Advanced Screen .......................................................................................................76 6.7 Quality of Service (QoS) Screen .......................................................................................................78 6 NBG-418N Users Guide Table of Contents 6.8 WPS Screen ......................................................................................................................................79 6.9 WPS Station Screen ..........................................................................................................................80 6.10 Scheduling Screen ..........................................................................................................................81 6.11 AP Select Screen ............................................................................................................................82 6.12 WLAN Info Screen ..........................................................................................................................83 Chapter 7 WAN .....................................................................................................................................................85 7.1 Overview ...........................................................................................................................................85 7.2 What You Need To Know ..................................................................................................................85 7.2.1 Configuring Your Internet Connection ......................................................................................85 7.3 Internet Connection ...........................................................................................................................86 7.3.1 Ethernet Encapsulation ...........................................................................................................86 7.3.2 PPPoE Encapsulation .............................................................................................................88 7.3.3 PPTP Encapsulation ................................................................................................................90 Chapter 8 LAN ......................................................................................................................................................93 8.1 Overview ...........................................................................................................................................93 8.2 What You Need To Know ..................................................................................................................93 8.2.1 IP Pool Setup ...........................................................................................................................94 8.2.2 LAN TCP/IP .............................................................................................................................94 8.3 LAN IP Screen ..................................................................................................................................94 Chapter 9 DHCP Server .......................................................................................................................................97 9.1 Overview ...........................................................................................................................................97 9.2 What You Can Do .............................................................................................................................97 9.3 What You Need To Know ..................................................................................................................97 9.4 General Screen .................................................................................................................................97 9.5 Advanced Screen ...........................................................................................................................98 9.6 Client List Screen ............................................................................................................................100 Chapter 10 Network Address Translation ..........................................................................................................101 10.1 Overview ....................................................................................................................................101 10.2 What You Can Do .........................................................................................................................102 10.2.1 What You Need To Know .....................................................................................................102 10.3 General NAT Screen .....................................................................................................................103 10.4 NAT Application Screen ..............................................................................................................104 10.5 Technical Reference ......................................................................................................................106 10.5.1 NAT Port Forwarding: Services and Port Numbers .............................................................106 10.5.2 NAT Port Forwarding Example ............................................................................................107 NBG-418N Users Guide 7 Table of Contents Chapter 11 Dynamic DNS ....................................................................................................................................109 11.1 Overview ......................................................................................................................................109 11.2 Dynamic DNS Screen .................................................................................................................109 Chapter 12 Firewall .............................................................................................................................................. 111 12.1 Overview ..................................................................................................................................... 111 12.2 What You Can Do ......................................................................................................................... 111 12.3 What You Need To Know .............................................................................................................. 112 12.3.1 About the NBG-418N Firewall ............................................................................................. 112 12.3.2 VPN Pass Through Features ............................................................................................... 112 12.4 General Firewall Screen ............................................................................................................. 112 12.5 Services Screen ......................................................................................................................... 113 Chapter 13 Remote Management........................................................................................................................ 115 13.1 Overview ....................................................................................................................................... 115 13.1.1 Remote Management Limitations ........................................................................................ 116 13.1.2 Remote Management and NAT ........................................................................................... 116 13.1.3 System Timeout ................................................................................................................... 116 13.2 WWW Screen ............................................................................................................................. 116 Chapter 14 Universal Plug-and-Play (UPnP)...................................................................................................... 119 14.1 Overview ...................................................................................................................................... 119 14.2 What You Need to Know ............................................................................................................... 119 14.3 Configuring UPnP .........................................................................................................................120 14.3.1 Using UPnP in Windows XP Example .................................................................................120 14.3.2 Web Configurator Easy Access ...........................................................................................122 Chapter 15 System ...............................................................................................................................................125 15.1 Overview .......................................................................................................................................125 15.2 What You Can Do .........................................................................................................................125 15.3 System General Screen ...............................................................................................................125 15.4 Time Setting Screen ......................................................................................................................126 Chapter 16 Logs ...................................................................................................................................................129 16.1 Overview .......................................................................................................................................129 16.2 What You Need to Know ...............................................................................................................129 16.3 View Log Screen ...........................................................................................................................129 8 NBG-418N Users Guide Table of Contents Chapter 17 Tools ..................................................................................................................................................131 17.1 Overview .......................................................................................................................................131 17.2 What You Can Do .........................................................................................................................131 17.3 Firmware Upload Screen ..............................................................................................................131 17.4 Configuration Screen ....................................................................................................................133 17.4.1 Backup Configuration ..........................................................................................................133 17.4.2 Restore Configuration ..........................................................................................................133 17.4.3 Back to Factory Defaults .....................................................................................................134 17.5 Restart Screen ..............................................................................................................................134 Chapter 18 Sys OP Mode.....................................................................................................................................137 18.1 Overview .......................................................................................................................................137 18.2 General Screen .............................................................................................................................137 Chapter 19 Language...........................................................................................................................................139 19.1 Language Screen ..........................................................................................................................139 Chapter 20 Troubleshooting................................................................................................................................141 20.1 Power, Hardware Connections, and LEDs ....................................................................................141 20.2 NBG-418N Access and Login .......................................................................................................142 20.3 Internet Access .............................................................................................................................143 20.4 Resetting the NBG-418N to Its Factory Defaults ..........................................................................144 20.5 Wireless Problems ........................................................................................................................145 Appendix A IP Addresses and Subnetting.......................................................................................147 Appendix B Pop-up Windows, JavaScripts and Java Permissions..................................................157 Appendix C Setting Up Your Computers IP Address ......................................................................167 Appendix D Wireless LANs..............................................................................................................195 Appendix E Common Services ........................................................................................................209 Appendix F Legal Information..........................................................................................................213 Index ..................................................................................................................................................219 NBG-418N Users Guide 9 Table of Contents 10 NBG-418N Users Guide PART I Users Guide 11 12 CHAPTER 1 Introduction 1.1 Overview The NBG-418N extends the range of your existing wired network without additional wiring, providing easy network access to mobile users. Your can create the following connections using the NBG-418N:

LAN. You can connect network devices via the Ethernet ports of the NBG-418N so that they can communicate with each other and access the Internet. WLAN. Wireless clients can connect to the NBG-418N to access network resources. WAN. Connect to a broadband modem/router for Internet access. Figure 1 NBG-418N Network WLAN LAN1 LAN2 LAN3 LAN4 WAN You can set up the NBG-418N with other IEEE 802.11b/g/n compatible devices in one of the following device modes:

Router Access Point Universal Repeater Client Bridge NBG-418N Users Guide 13 Chapter 1 Introduction Use a (supported) web browser to manage the NBG-418N. Menus vary according to which mode youre using. Router Mode Non-Router Mode See Chapter 4 on page 35 for more information on these modes. 1.2 Securing the NBG-418N Do the following things regularly to make the NBG-418N more secure and to manage the NBG-

418N more effectively. Change the password. Use a password thats not easy to guess and that consists of different types of characters, such as numbers and letters. Write down the password and put it in a safe place. Back up the configuration (and make sure you know how to restore it). Restoring an earlier working configuration may be useful if the device becomes unstable or even crashes. If you forget your password, you will have to reset the NBG-418N to its factory default settings. If you backed up an earlier configuration file, you would not have to totally re-configure the NBG-418N. You could simply restore your last configuration. 14 NBG-418N Users Guide 1.3 LEDs Figure 2 Front Panel Chapter 1 Introduction The following table describes the LEDs and the WPS button. Table 1 Front Panel LEDs and WPS Button LED POWER STATUS On COLOR Green DESCRIPTION The NBG-418N is receiving power and functioning properly. LAN 1-4 Green Off On The NBG-418N is not receiving power. The NBG-418N has a successful 10/100MB LAN connection. Blinking The NBG-418N is sending/receiving data through the LAN. WAN Green Off On The LAN is not connected. The NBG-418N has a successful 10/100MB WAN connection. WLAN Green WPS Green Blinking The NBG-418N is sending/receiving data through the WAN. Off On The WAN connection is not ready, or has failed. The NBG-418N is ready, but is not sending/receiving data through the wireless LAN. Blinking The NBG-418N is sending/receiving data through the wireless LAN. Off On Blinking The NBG-418N is negotiating a WPS connection with a wireless client. The wireless LAN is not ready or has failed. WPS status is configured. The NBG-418N is negotiating a WPS connection with a wireless client. Off The WPS status is not configured or disabled. 1.4 The WPS Button Your NBG-418N supports WiFi Protected Setup (WPS), which is an easy way to set up a secure wireless network. WPS is an industry standard specification, defined by the WiFi Alliance. WPS allows you to quickly set up a wireless network with strong security, without having to configure security settings manually. Each WPS connection works between two devices. Both devices must support WPS (check each devices documentation to make sure). Depending on the devices you have, you can either press a button (recommended) on the device itself, or in its configuration utility or enter a PIN (a unique Personal Identification Number that NBG-418N Users Guide 15 Chapter 1 Introduction allows one device to authenticate the other) in each of the two devices. When WPS is activated on a device, it has two minutes to find another device that also has WPS activated. Then, the two devices connect and set up a secure network by themselves. For more information on using WPS, see Section 5.2.1 on page 57. 1.5 Wall Mounting You may need screw anchors if mounting on a concrete or brick wall. Table 2 Wall Mounting Information Distance between holes M4 Screws Screw anchors (optional) 12 cm Two Two 1 Select a position free of obstructions on a wall strong enough to hold the weight of the device. 2 Mark two holes on the wall at the appropriate distance apart for the screws. Be careful to avoid damaging pipes or cables located inside the wall when drilling holes for the screws. 3 If using screw anchors, drill two holes for the screw anchors into the wall. Push the anchors into the full depth of the holes, then insert the screws into the anchors. Do not insert the screws all the way in - leave a small gap of about 0.5 cm. If not using screw anchors, use a screwdriver to insert the screws into the wall. Do not insert the screws all the way in - leave a gap of about 0.5 cm. 4 Make sure the screws are fastened well enough to hold the weight of the NBG-418N with the connection cables. 5 Align the holes on the back of the NBG-418N with the screws on the wall. Hang the NBG-418N on the screws. Figure 3 Wall Mounting Example 16 NBG-418N Users Guide CHAPTER 2 The Web Configurator 2.1 Overview This chapter describes how to access the NBG-418N Web Configurator and provides an overview of its screens. The Web Configurator is an HTML-based management interface that allows easy setup and management of the NBG-418N via Internet browser. Use Internet Explorer 6.0 and later versions, Mozilla Firefox 3 and later versions, or Safari 2.0 and later versions. The recommended screen resolution is 1024 by 768 pixels. In order to use the Web Configurator you need to allow:

Web browser pop-up windows from your device. Web pop-up blocking is enabled by default in Windows XP SP (Service Pack) 2. JavaScript (enabled by default). Java permissions (enabled by default). Refer to Chapter 20 Troubleshooting to see how to make sure these functions are allowed in Internet Explorer. 2.2 Accessing the Web Configurator 1 Make sure your NBG-418N hardware is properly connected and prepare your computer or computer network to connect to the NBG-418N (refer to the Quick Start Guide). 2 3 4 Launch your web browser. Type "http://192.168.1.1" as the website address in your web browser. This is the default LAN IP address in router mode, the default device mode (192.168.1.2 is the default IP address in non-

router mode). Your computer must be in the same subnet in order to access this website address. In router mode, the NBG-418N can assign your computer an IP address, so you must set your computer to get an IP address automatically (computer factory default) or give it a fixed IP address in the range between 192.168.1.3 and 192.168.1.254 (see the appendices). Type admin (default) as the user name and 1234 (default) as the password and click OK. NBG-418N Users Guide 17 Chapter 2 The Web Configurator Figure 4 Login Screen Note: The management session automatically times out when the time period set in the Administrator Inactivity Timer field expires (default five minutes). Simply log back into the NBG-418N if this happens. 5 Select the setup type you want to use. Click Go to Wizard Setup to use the Configuration Wizard for basic Internet and Wireless setup. Click Go to Advanced Setup to view and configure all the NBG-418Ns settings. Select a language to go to the basic Web Configurator in that language. To change to the advanced configurator see Chapter 19 on page 139. Figure 5 Selecting the setup mode 18 NBG-418N Users Guide Chapter 2 The Web Configurator 2.3 Resetting the NBG-418N If you forget your password or IP address, or you cannot access the Web Configurator, you will need to use the RESET button at the back of the NBG-418N to reload the factory-default configuration file. This means that you will lose all configurations that you had previously saved, the username will be reset to admin and password will be reset to 1234. The IP address will be reset to 192.168.1.1. 2.3.1 Using the RESET Button 1 Make sure the power LED is on. 2 3 Press the RESET button for longer than 1 second to restart/reboot the NBG-418N. Press the RESET button for longer than five seconds to set the NBG-418N back to its factory-

default configurations. NBG-418N Users Guide 19 Chapter 2 The Web Configurator 20 NBG-418N Users Guide CHAPTER 3 Connection Wizard 3.1 Wizard Setup This chapter provides information on the wizard setup screens in the Web Configurator. The Web Configurators wizard setup helps you configure your device to access the Internet. Refer to your ISP (Internet Service Provider) checklist in the Quick Start Guide to know what to enter in each field. Leave a field blank if you dont have that information. 1 After you access the NBG-418N Web Configurator, click Go to Wizard setup. You can click Go to Advanced setup to skip this wizard setup and configure basic or advanced features accordingly. Figure 6 Select Wizard or Advanced Mode 2 Choose a language by clicking on the languages button. The screen will update. Click the Next button to proceed to the next screen. NBG-418N Users Guide 21 Chapter 3 Connection Wizard Figure 7 Select a Language 3 Read the on-screen information and click Next. Figure 8 Welcome to the Connection Wizard 3.2 Connection Wizard: STEP 1: System Information System Information contains administrative and system-related information. 3.2.1 System Name System Name is for identification purposes. However, because some ISPs check this name you should enter your computer's "Computer Name". In Windows 95/98 click Start > Settings > Control Panel > Network. Click the Identification tab, note the entry for the Computer Name field and enter it as the System Name. In Windows 2000, click Start > Settings and Control Panel and then double-click System. Click the Network Identification tab and then the Properties button. Note the entry for the Computer name field and enter it as the System Name. In Windows XP, click Start > My Computer > View system information and then click the Computer Name tab. Note the entry in the Full computer name field and enter it as the NBG-

418N System Name. 22 NBG-418N Users Guide Chapter 3 Connection Wizard 3.2.2 Domain Name The Domain Name entry is what is propagated to the DHCP clients on the LAN. If you leave this blank, the domain name obtained by DHCP from the ISP is used. While you must enter the host name (System Name) on each individual computer, the domain name can be assigned from the NBG-418N via DHCP. Click Next to configure the NBG-418N for Internet access. Figure 9 Wizard Step 1: System Information The following table describes the labels in this screen. Table 3 Wizard Step 1: System Information LABEL System Name DESCRIPTION System Name is a unique name to identify the NBG-418N in an Ethernet network. Enter a descriptive name. This name can be up to 30 alphanumeric characters long. Spaces are not allowed, but dashes "-" and underscores "_" are accepted. Domain Name Type the domain name (if you know it) here. If you leave this field blank, the ISP may assign a domain name via DHCP. The domain name entered by you is given priority over the ISP assigned domain name. Back Next Exit Click Back to display the previous screen. Click Next to proceed to the next screen. Click Exit to close the wizard screen without saving. 3.3 Connection Wizard: STEP 2: Wireless LAN Set up your wireless LAN using the following screen. NBG-418N Users Guide 23 Chapter 3 Connection Wizard Figure 10 Wizard Step 2: Wireless LAN The following table describes the labels in this screen. Table 4 Wizard Step 2: Wireless LAN LABEL Name (SSID) DESCRIPTION Enter a descriptive name (up to 32 printable 7-bit ASCII characters) for the wireless LAN. If you change this field on the NBG-418N, make sure all wireless stations use the same SSID in order to access the network. Security Select a Security level from the drop-down list box. Choose None to have no wireless LAN security configured. If you do not enable any wireless security on your NBG-418N, your network is accessible to any wireless networking device that is within range. If you choose this option, skip directly to Section 3.4 on page 25. Choose WPA-PSK or WPA2-PSK security to configure a Pre-Shared Key. Choose this option only if your wireless clients support WPA-PSK or WPA2-PSK respectively. If you choose this option, skip directly to Section 3.3.1 on page 24. Channel Selection The range of radio frequencies used by IEEE 802.11b/g/n wireless devices is called a channel. Set the operating frequency/channel depending on your particular region. Select a channel from the drop-down list box. The options vary depending on the frequency band and the country you are in. This option is only available if Auto Channel Selection is disabled. Auto Channel Selection Select this option for the NBG-418N to automatically choose the channel with the least interference. Deselect this option if you wish to manually select the channel using the Channel Selection field. Back Next Exit Click Back to display the previous screen. Click Next to proceed to the next screen. Click Exit to close the wizard screen without saving. Note: The wireless stations and NBG-418N must use the same SSID, channel ID, WPA-

PSK (if WPA-PSK is enabled) or WPA2-PSK (if WPA2-PSK is enabled) for wireless communication. 3.3.1 WPA-PSK or WPA2-PSK Security Choose WPA-PSK or WPA2-PSK security in the Wireless LAN setup screen to set up a Pre-

Shared Key. 24 NBG-418N Users Guide Figure 11 Wizard Step 2: WPA-PSK or WPA2-PSK Security Chapter 3 Connection Wizard The following table describes the labels in this screen. Table 5 Wizard Step 2: WPA-PSK or WPA2-PSK Security LABEL Pre-Shared Key DESCRIPTION Type from 8 to 63 case-sensitive ASCII characters or 64 HEX characters. You can set up the most secure wireless connection by configuring WPA in the wireless LAN screens. You need to configure an authentication server to do this. Back Next Exit Click Back to display the previous screen. Click Next to proceed to the next screen. Click Exit to close the wizard screen without saving. 3.4 Connection Wizard: STEP 3: Internet Configuration The NBG-418N offers three Internet connection types. They are Ethernet, PPP over Ethernet or PPTP. The wizard attempts to detect which WAN connection type you are using. If the wizard does not detect a connection type, you must select one from the drop-down list box. Check with your ISP to make sure you use the correct type. This wizard screen varies according to the connection type that you select. Figure 12 Wizard Step 3: ISP Parameters. NBG-418N Users Guide 25 Chapter 3 Connection Wizard The following table describes the labels in this screen, Table 6 Wizard Step 3: ISP Parameters CONNECTION TYPE DESCRIPTION Select the Ethernet option when the WAN port is used as a regular Ethernet. Ethernet PPPoE PPTP Select the PPP over Ethernet option for a dial-up connection. If your ISP gave you an IP address and/or subnet mask, then select PPTP. Select the PPTP option for a dial-up connection. 3.4.1 Ethernet Connection Choose Ethernet when the WAN port is used as a regular Ethernet. Continue to Section 3.4.4 on page 28. Figure 13 Wizard Step 3: Ethernet Connection 3.4.2 PPPoE Connection Point-to-Point Protocol over Ethernet (PPPoE) functions as a dial-up connection. PPPoE is an IETF

(Internet Engineering Task Force) standard specifying how a host personal computer interacts with a broadband modem (for example DSL, cable, wireless, etc.) to achieve access to high-speed data networks. For the service provider, PPPoE offers an access and authentication method that works with existing access control systems (for instance, RADIUS). One of the benefits of PPPoE is the ability to let end users access one of multiple network services, a function known as dynamic service selection. This enables the service provider to easily create and offer new IP services for specific users. Operationally, PPPoE saves significant effort for both the subscriber and the ISP/carrier, as it requires no specific configuration of the broadband modem at the subscribers site. By implementing PPPoE directly on the NBG-418N (rather than individual computers), the computers on the LAN do not need PPPoE software installed, since the NBG-418N does that part of the task. Furthermore, with NAT, all of the LAN's computers will have Internet access. 26 NBG-418N Users Guide Figure 14 Wizard Step 3: PPPoE Connection Chapter 3 Connection Wizard The following table describes the labels in this screen. Table 7 Wizard Step 3: PPPoE Connection LABEL ISP Parameter for Internet Access DESCRIPTION Connection Type Select the PPP over Ethernet option for a dial-up connection. Service Name Type the name of your service provider. User Name Password Back Next Exit Type the user name given to you by your ISP. Type the password associated with the user name above. Click Back to return to the previous screen. Click Next to continue. Click Exit to close the wizard screen without saving. 3.4.3 PPTP Connection Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables transfers of data from a remote client to a private server, creating a Virtual Private Network (VPN) using TCP/IP-based networks. PPTP supports on-demand, multi-protocol, and virtual private networking over public networks, such as the Internet. Refer to the appendix for more information on PPTP. Note: The NBG-418N supports one PPTP server connection at any given time. NBG-418N Users Guide 27 Chapter 3 Connection Wizard Figure 15 Wizard Step 3: PPTP Connection The following table describes the fields in this screen Table 8 Wizard Step 3: PPTP Connection LABEL ISP Parameters for Internet Access DESCRIPTION Connection Type User Name Password PPTP Configuration Select PPTP from the drop-down list box. To configure a PPTP client, you must configure the User Name and Password fields for a PPP connection and the PPTP parameters for a PPTP connection. Type the user name given to you by your ISP. Type the password associated with the User Name above. Server IP Address Type the IP address of the PPTP server. Get automatically from ISP Select this radio button if your ISP did not assign you a fixed IP address. Use fixed IP address Select this radio button, provided by your ISP to give the NBG-418N a fixed, unique IP address. My IP Address Type the (static) IP address assigned to you by your ISP. My IP Subnet Mask Type the subnet mask assigned to you by your ISP (if given). My IP Gateway Type the gateway IP address assigned to you by your ISP (if given). Back Next Exit Click Back to return to the previous screen. Click Next to continue. Click Exit to close the wizard screen without saving. 3.4.4 Your IP Address The following wizard screen allows you to assign a fixed IP address or give the NBG-418N an automatically assigned IP address depending on your ISP. 28 NBG-418N Users Guide Figure 16 Wizard Step 3: Your IP Address Chapter 3 Connection Wizard The following table describes the labels in this screen Table 9 Wizard Step 3: Your IP Address DESCRIPTION LABEL Select this option If your ISP did not assign you a fixed IP address. This is the Get automatically from default selection. If you choose this option, skip directly to Section 3.4.9 on page your ISP 31. Use fixed IP address provided by your ISP Select this option if you were given IP address and/or DNS server settings by the ISP. The fixed IP address should be in the same subnet as your broadband modem or router. Back Next Exit Click Back to return to the previous screen. Click Next to continue. Click Exit to close the wizard screen without saving. 3.4.5 WAN IP Address Assignment Every computer on the Internet must have a unique IP address. If your networks are isolated from the Internet, for instance, only between your two branch offices, you can assign any IP addresses to the hosts without problems. However, the Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of IP addresses specifically for private networks. Table 10 Private IP Address Ranges 10.0.0.0 10.255.255.255

172.16.0.0 192.168.0.0

172.31.255.255 192.168.255.255 You can obtain your IP address from the IANA, from an ISP or have it assigned by a private network. If you belong to a small organization and your Internet access is through an ISP, the ISP can provide you with the Internet addresses for your local networks. On the other hand, if you are part of a much larger organization, you should consult your network administrator for the appropriate IP addresses. Note: Regardless of your particular situation, do not create an arbitrary IP address;

always follow the guidelines above. For more information on address assignment, please refer to RFC 1597, Address Allocation for Private Internets and RFC 1466, Guidelines for Management of IP Address Space. NBG-418N Users Guide 29 Chapter 3 Connection Wizard 3.4.6 IP Address and Subnet Mask Similar to the way houses on a street share a common street name, so too do computers on a LAN share one common network number. Where you obtain your network number depends on your particular situation. If the ISP or your network administrator assigns you a block of registered IP addresses, follow their instructions in selecting the IP addresses and the subnet mask. If the ISP did not explicitly give you an IP network number, then most likely you have a single user account and the ISP will assign you a dynamic IP address when the connection is established. The Internet Assigned Number Authority (IANA) reserved this block of addresses specifically for private use; please do not use any other number unless you are told otherwise. Let's say you select 192.168.1.0 as the network number; which covers 254 individual addresses, from 192.168.1.1 to 192.168.1.254 (zero and 255 are reserved). In other words, the first three numbers specify the network number while the last number identifies an individual computer on that network. Once you have decided on the network number, pick an IP address that is easy to remember, for instance, 192.168.1.1, for your NBG-418N, but make sure that no other device on your network is using that IP address. The subnet mask specifies the network number portion of an IP address. Your NBG-418N will compute the subnet mask automatically based on the IP address that you entered. You don't need to change the subnet mask computed by the NBG-418N unless you are instructed to do otherwise. 3.4.7 DNS Server Address Assignment Use DNS (Domain Name System) to map a domain name to its corresponding IP address and vice versa, for instance, the IP address of www.zyxel.com is 204.217.0.2. The DNS server is extremely important because without it, you must know the IP address of a computer before you can access it. The NBG-418N can get the DNS server addresses in the following ways. 1 2 The ISP tells you the DNS server addresses, usually in the form of an information sheet, when you sign up. If your ISP gives you DNS server addresses, enter them in the DNS Server fields in the Wizard and/or WAN > Internet Connection screen. If the ISP did not give you DNS server information, leave the DNS Server fields set to 0.0.0.0 in the Wizard screen and/or set to From ISP in the WAN > Internet Connection screen for the ISP to dynamically assign the DNS server IP addresses. 3.4.8 WAN IP and DNS Server Address Assignment The following wizard screen allows you to assign a fixed WAN IP address and DNS server addresses. 30 NBG-418N Users Guide Figure 17 Wizard Step 3: WAN IP and DNS Server Addresses Chapter 3 Connection Wizard The following table describes the labels in this screen Table 11 Wizard Step 3: WAN IP and DNS Server Addresses LABEL WAN IP Address Assignment DESCRIPTION My WAN IP Address Enter your WAN IP address in this field. The WAN IP address should be in the same subnet as your DSL/Cable modem or router. My WAN IP Subnet Mask Enter the IP subnet mask in this field. Gateway IP Address Enter the gateway IP address in this field. System DNS Server Address Assignment (if applicable) DNS (Domain Name System) is for mapping a domain name to its corresponding IP address and vice versa. The DNS server is extremely important because without it, you must know the IP address of a computer before you can access it. The NBG-418N uses a system DNS server (in the order you specify here) to resolve domain names for DDNS and the time server. First DNS Server Enter the DNS server's IP address in the fields provided. Second DNS Server If you do not configure a system DNS server, you must use IP addresses when configuring DDNS and the time server. Back Next Exit Click Back to return to the previous screen. Click Next to continue. Click Exit to close the wizard screen without saving. 3.4.9 WAN MAC Address Every Ethernet device has a unique MAC (Media Access Control) address. The MAC address is assigned at the factory and consists of six pairs of hexadecimal characters, for example, 00:A0:C5:00:00:02. This screen allows users to configure the WAN port's MAC address by either using the NBG-418Ns MAC address, copying the MAC address of the computer from which you are configuring the NBG-

418N or manually entering a MAC address. Once it is successfully configured, the address will be copied to configuration file. It is advisable to clone the MAC address from a computer on your LAN even if your ISP does not presently require MAC address authentication. NBG-418N Users Guide 31 Chapter 3 Connection Wizard Figure 18 Wizard Step 3: WAN MAC Address The following table describes the fields in this screen. Table 12 Wizard Step 3: WAN MAC Address LABEL Factory Default DESCRIPTION Select Factory Default to use the factory assigned default MAC address. Clone the computer's MAC address - MAC Address Set WAN MAC Address Back Next Exit Select this option to clone the MAC address of the computer (displaying in the screen) from which you are configuring the NBG-418N. It is advisable to clone the MAC address from a computer on your LAN even if your ISP does not presently require MAC address authentication. Select this option and enter the MAC address you want to use. Click Back to return to the previous screen. Click Next to continue. Click Exit to close the wizard screen without saving. 3.5 Connection Wizard Complete Click Apply to complete the wizard setup. Figure 19 Connection Wizard Complete 32 NBG-418N Users Guide Well done! You have successfully set up your NBG-418N to operate on your network and access the Internet. Chapter 3 Connection Wizard NBG-418N Users Guide 33 Chapter 3 Connection Wizard 34 NBG-418N Users Guide CHAPTER 4 Modes 4.1 Overview You can set up the NBG-418N with other IEEE 802.11b/g/n compatible devices in different device modes. Note: Choose your device mode carefully to avoid having to change it later. The NBG-

418N automatically restarts when you change modes. The default LAN IP address of the NBG-418N in Router mode is 192.168.1.1. The default IP address of the NBG-418N in other modes is 192.168.1.2. Router: Use this mode if you want to use routing functions such as LAN DHCP, NAT, firewall and so on on the NBG-418N (N). The NBG-418N has separate LAN and WAN network IP addresses. Connect the WAN port to an Internet Access Device (IAD) such as a broadband modem. Figure 20 Router WLAN LAN IAD WAN N LEW LEW Access Point: Use this mode if you already have a Router (R) in your network and you want to set up a wireless network and bridge the wired and wireless connections on the NBG-416N. Figure 21 AP Mode WLAN R WAN N LAN NBG-418N Users Guide 35 Chapter 4 Modes Universal Repeater: In this mode, the NBG-418N (N) can be an access point and a wireless client at the same time. Use this mode if there is an existing wireless router or access point in your network and you want the NBG-418N (N) to wirelessly relay communications from its wireless clients to the access point. LEW Figure 22 Universal Repeater WLAN AP N Client Bridge: Use this mode if there is an existing wireless router or access point (AP) in the network to which you want to connect your NBG-418N (N) wirelessly. You should know the SSID and wireless security details of the wireless router or access point to which you want to connect. Figure 23 Client Bridge N AP LEW 4.2 Setting your NBG-418N to Router Mode The NBG-418N is set to wireless router mode by default. If it was changed and now you want to set it back, do the following procedure. Connect your computer to the LAN port of the NBG-418N. The default LAN IP address of the NBG-418N is 192.168.1.1 in router mode (192.168.1.2 by default in non-router mode). In router mode, the NBG-418N can assign your computer an IP address, so you must set your computer to get an IP address automatically (computer factory default) or give it a fixed IP address in the range between 192.168.1.3 and 192.168.1.254. After youve set your computers IP address, open a web browser such as Internet Explorer and type the IP address of the NBG-418N as the web address in your web browser. Log into the Web Configurator. See the Chapter 2 on page 17 for instructions on how to do this. NBG-418N Users Guide 1 2 3 4 36 5 Go to Maintenance > Sys OP Mode > General and select Router. Figure 24 Maintenance > Sys OP Mode > Router Chapter 4 Modes 6 A pop-up window appears providing information on this mode. Click OK in the pop-up message window. Click Apply. Note: Wait while the NBG-418N restarts, then log in to the Web Configurator again. The NBG-418N IP address is now 192.168.1.1. 4.2.1 Status Screen (Router Mode) The screen below shows the status screen in Router mode. NBG-418N Users Guide 37 Chapter 4 Modes Figure 25 Status Screen (Router Mode) The following table describes the icons shown in the Status screen. Table 13 Status Screen Icon Key ICON DESCRIPTION Click this icon to open the setup wizard. Click this icon to view copyright and a link for related product information. Click this icon at any time to exit the Web Configurator. Select a number of seconds or None from the drop-down list box to refresh all screen statistics automatically at the end of every time interval or to not refresh the screen statistics. Click this button to refresh the status screen statistics. The following table describes the labels shown in the Status screen in Router mode. Table 14 Web Configurator Status Screen (Router Mode) LABEL Device Information DESCRIPTION System Name This is the System Name you enter in the Maintenance > System >

General screen. It is for identification purposes. 38 NBG-418N Users Guide Chapter 4 Modes Table 14 Web Configurator Status Screen (Router Mode) (continued) LABEL DESCRIPTION This is the current firmware version of the NBG-418N. Firmware Version WAN Information

- MAC Address This shows the WAN Ethernet adapter MAC Address of your device.

- Connection Type This shows the current connection type.

- IP Address This shows the WAN ports IP address.

- IP Subnet Mask This shows the WAN ports subnet mask.

- Gateway

- DNS LAN Information

- MAC Address

- IP Address This shows the WAN ports gateway IP address. This shows the IP address of your DNS server. This shows the LAN Ethernet adapter MAC Address of your device. This shows the LAN ports IP address.

- IP Subnet Mask This shows the LAN ports subnet mask.

- DHCP This shows the LAN ports DHCP role - Server or None. WLAN Information

- MAC Address This shows the wireless adapter MAC Address of your device.

- Status

- Name (SSID)

- Channel This shows the current status of the Wireless LAN - On, Off or Off by scheduler. This shows a descriptive name used to identify the NBG-418N in the wireless LAN. This shows the channel number which you select manually or the NBG-418N automatically scans and selects.

- Operating Channel This shows the channel number which the NBG-418N is currently using over the wireless LAN.

- Security Mode

- 802.11 Mode

- WPS System Status Operation Mode This shows the level of wireless security the NBG-418N is using. This shows the wireless standard. This displays Configured when the WPS has been set up. This displays Unconfigured if the WPS has not been set up. Click the status to display Network > Wireless LAN > WPS screen. This field shows the device operation mode: Router, Access Point, Client Bridge or Universal Repeater. System Up Time This is the total time the NBG-418N has been on. Current Date/Time This field displays your NBG-418Ns present date and time. System Resource

- CPU Usage

- Memory Usage System Setting

- Firewall

- UPnP Interface Status This displays what percentage of the NBG-418Ns processing ability is currently used. When this percentage is close to 100%, the NBG-418N is running at full load, and the throughput is not going to improve anymore. If you want some applications to have more throughput, you should turn off other applications. This shows what percentage of the heap memory the NBG-418N is using. This shows whether the firewall is active or not. This shows whether UPnP is active or not. NBG-418N Users Guide 39 Chapter 4 Modes Table 14 Web Configurator Status Screen (Router Mode) (continued) LABEL Interface Status Rate Summary DESCRIPTION This displays the NBG-418N port types. The port types are: WAN, LAN and WLAN. For the LAN and WAN ports, this field displays Down (line is down) or Up (line is up or connected). For the WLAN, it displays Up when the WLAN is enabled or Down when the WLAN is disabled. For the LAN ports, this displays the port speed and duplex setting or NA when the line is disconnected. For the WAN port, it displays the port speed and duplex setting if youre using Ethernet encapsulation and Idle (line (ppp) idle), Dial (starting to trigger a call) and Drop (dropping a call) if you're using PPPoE or PPTP encapsulation. This field displays NA when the line is disconnected. For the WLAN, it displays the maximum transmission rate when the WLAN is enabled and NA when the WLAN is disabled. DHCP Table Use this screen to view current DHCP client information. Packet Statistics Use this screen to view port status and packet specific statistics. WLAN Station Status Use this screen to view the wireless stations that are currently associated to the NBG-418N. 4.2.1.1 Summary: DHCP Table DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to obtain TCP/IP configuration at start-up from a server. You can configure the NBG-418Ns LAN as a DHCP server or disable it. When configured as a server, the NBG-418N provides the TCP/IP configuration for the clients. If DHCP service is disabled, you must have another DHCP server on that network, or else the computer must be manually configured. Click the DHCP Table (Details...) hyperlink in the Status screen. Read-only information here relates to your DHCP status. The DHCP table shows current DHCP client information (including IP Address, Host Name and MAC Address) of all network clients using the NBG-418Ns DHCP server. Figure 26 Summary: DHCP Table The following table describes the labels in this screen. Table 15 Summary: DHCP Table LABEL

DESCRIPTION This is the index number of the host computer. IP Address This field displays the IP address relative to the # field listed above. Host Name This field displays the computer host name. 40 NBG-418N Users Guide Chapter 4 Modes Table 15 Summary: DHCP Table (continued) LABEL MAC Address DESCRIPTION This field shows the MAC address of the computer with the name in the Host Name field. Every Ethernet device has a unique MAC (Media Access Control) address which uniquely identifies a device. The MAC address is assigned at the factory and consists of six pairs of hexadecimal characters, for example, 00:A0:C5:00:00:02. Refresh Click Refresh to renew the screen. 4.2.1.2 Summary: Packet Statistics Click the Packet Statistics (Details...) hyperlink in the Status screen. Read-only information here includes port status, packet specific statistics and the "system up time". The Poll Interval(s) field is configurable and is used for refreshing the screen. Figure 27 Summary: Packet Statistics The following table describes the labels in this screen. Table 16 Summary: Packet Statistics LABEL Port DESCRIPTION This is the NBG-418Ns port type. Status For the LAN ports, this displays the port speed and duplex setting or Down when the line is disconnected. For the WAN port, it displays the port speed and duplex setting if youre using Ethernet encapsulation and Idle (line (ppp) idle), Dial (starting to trigger a call) and Drop

(dropping a call) if you're using PPPoE or PPTP encapsulation. This field displays Down when the line is disconnected. For the WLAN, it displays the maximum transmission rate when the WLAN is enabled and Down when the WLAN is disabled. TxPkts RxPkts Collisions Tx B/s Rx B/s This is the number of transmitted packets on this port. This is the number of received packets on this port. This is the number of collisions on this port. This displays the transmission speed in bytes per second on this port. This displays the reception speed in bytes per second on this port. System Up Time This is the total time the NBG-418N has been on. Poll Interval(s) Enter the time interval for refreshing statistics in this field. Set Interval Click this button to apply the new poll interval you entered in the Poll Interval(s) field. Stop Click Stop to stop refreshing statistics. NBG-418N Users Guide 41 Chapter 4 Modes 4.2.1.3 Summary: WLAN Station Status Click the WLAN Station Status (Details...) hyperlink in the Status screen. View the wireless stations that are currently associated to the NBG-418N in the Association List. Association means that a wireless client (for example, your network or computer with a wireless network card) has connected successfully to the AP (or wireless router) using the same SSID, channel and security settings. Figure 28 Summary: WLAN Station Status The following table describes the labels in this screen. Table 17 Summary: WLAN Station Status LABEL

DESCRIPTION This is the index number of an associated wireless station. MAC Address This field displays the MAC address of an associated wireless station. Association Time This field displays the time a wireless station first associated with the NBG-418Ns WLAN network. Refresh Click Refresh to reload the list. 4.2.2 Router Mode Navigation Panel Use the menu in the navigation panel menus to configure NBG-418N features in Router Mode. 42 NBG-418N Users Guide Figure 29 Menus: Router Mode Chapter 4 Modes The following table describes the sub-menus. Table 18 Menus: Router Mode LINK Status TAB Network Wireless LAN General MAC Filter FUNCTION This screen shows the NBG-418Ns general device, system and interface status information. Use this screen to access the wizard, and summary statistics tables. Use this screen to configure wireless LAN. Use the MAC filter screen to configure the NBG-418N to block access to devices or block the devices from accessing the NBG-418N. Advanced This screen allows you to configure advanced wireless settings. QoS WPS Use this screen to configure Wi-Fi Multimedia Quality of Service (WMM QoS). WMM QoS allows you to prioritize wireless traffic according to the delivery requirements of individual services. Use this screen to configure WPS. WPS Station Use this screen to add a wireless station using WPS. WAN LAN DHCP Server Scheduling Internet Connection IP General Advanced Use this screen to schedule the times the Wireless LAN is enabled. This screen allows you to configure ISP parameters, WAN IP address assignment, DNS servers and the WAN MAC address. Use this screen to configure LAN IP address and subnet mask. Use this screen to enable the NBG-418Ns DHCP server. Use this screen to assign IP addresses to specific individual computers based on their MAC addresses and to have DNS servers assigned by the DHCP server. Client List Use this screen to view current DHCP client information and to always assign an IP address to a MAC address (and host name). NBG-418N Users Guide 43 Chapter 4 Modes Table 18 Menus: Router Mode (continued) FUNCTION LINK Use this screen to enable NAT. TAB General NAT Application Use this screen to configure servers behind the NBG-418N. DDNS General Use this screen to configure Dynamic DNS, a service that allows you to map a fixed domain name to a non-fixed IP address. Security Firewall Management General Services Use this screen to activate/deactivate the firewall. Use this screen to enable or disable ICMP and VPN passthrough features. Remote MGMT WWW Use this screen to configure through which interface(s) and from which IP address(es) users can use HTTP to manage the NBG-418N. UPnP General Use this screen to enable UPnP on the NBG-418N. Maintenance System General Use this screen to view and change administrative settings such as system and domain names, password and inactivity timer. Time Setting Use this screen to change your NBG-418Ns time and date. View Log Firmware Configuration Restart Use this screen to view the logs for the categories that you selected. Use this screen to upload firmware to your NBG-418N. Use this screen to backup and restore the configuration or reset the factory defaults to your NBG-418N. This screen allows you to reboot the NBG-418N without turning the power off. General This screen allows you to select the device operation mode. Logs Tools Sys OP Mode Language Language This screen allows you to select the language you prefer. 4.3 Setting your NBG-418N to AP Mode 1 2 3 4 Connect your computer to the LAN port of the NBG-418N. The default LAN IP address of the NBG-418N is 192.168.1.1 in router mode (192.168.1.2 by default in non-router mode). In router mode, the NBG-418N can assign your computer an IP address, so you must set your computer to get an IP address automatically (computer factory default) or give it a fixed IP address in the range between 192.168.1.3 and 192.168.1.254. After youve set your computers IP address, open a web browser such as Internet Explorer and type the IP address of the NBG-418N as the web address in your web browser. Log into the Web Configurator. See the Chapter 2 on page 17 for instructions on how to do this. 5 Go to Maintenance > Sys OP Mode > General and select Access Point. 44 NBG-418N Users Guide Figure 30 Maintenance > Sys OP Mode > AP Chapter 4 Modes 6 A pop-up window appears providing information on this mode. Click OK in the pop-up message window. Click Apply. Your NBG-418N is now in AP Mode. Note: Wait while the NBG-418N restarts, then log in to the Web Configurator again. 4.3.1 Status Screen (AP Mode) Click on Status. The screen below shows the status screen in AP Mode. Figure 31 Status Screen (AP Mode) NBG-418N Users Guide 45 Chapter 4 Modes The following table describes the labels shown in the Status screen. Table 19 Status Screen (AP Mode) LABEL Device Information DESCRIPTION System Name This is the System Name you enter in the Maintenance > System > General screen. It is for identification purposes. Firmware Version This is the current firmware version of the NBG-418N. LAN Information

- MAC Address This shows the LAN Ethernet adapter MAC Address of your device.

- IP Address This shows the LAN ports IP address.

- IP Subnet Mask This shows the LAN ports subnet mask.

- DHCP This shows the LAN ports DHCP role - None. WLAN Information

- MAC Address This shows the wireless adapter MAC Address of your device.

- Status This shows the current status of the Wireless LAN - On, Off, or Off by scheduler.

- Name (SSID) This shows a descriptive name used to identify the NBG-418N in the wireless LAN.

- Channel This shows the channel number which you select manually or the NBG-418N automatically scans and selects.

- Operating Channel This shows the channel number which the NBG-418N is currently using over the wireless LAN.

- Security Mode This shows the level of wireless security the NBG-418N is using.

- 802.11 Mode This shows the IEEE 802.11 standard that the NBG-418N supports. Wireless clients must support the same standard in order to be able to connect to the NBG-418N

- WPS This shows the WPS (WiFi Protected Setup) Status. Click the status to display Network > Wireless LAN > WPS screen. System Status Operation Mode This field shows the device operation mode: Router, Access Point, Client Bridge or Universal Repeater. System Up Time This is the total time the NBG-418N has been on. Current Date/Time This field displays your NBG-418Ns present date and time. System Resource

- CPU Usage This displays what percentage of the NBG-418Ns processing ability is currently used. When this percentage is close to 100%, the NBG-418N is running at full load, and the throughput is not going to improve anymore. If you want some applications to have more throughput, you should turn off other applications.

- Memory Usage This shows what percentage of the heap memory the NBG-418N is using. Interface Status Interface Status This displays the NBG-418N port types. The port types are: LAN and WLAN. For the LAN port, this field displays Down (line is down) or Up (line is up or connected). For the WLAN, it displays Up when the WLAN is enabled or Down when the WLAN is disabled. Rate For the LAN ports, this displays the port speed and duplex setting or N/A when the line is disconnected. For the WLAN, it displays the maximum transmission rate when the WLAN is enabled and N/A when the WLAN is disabled. Summary 46 NBG-418N Users Guide Chapter 4 Modes Table 19 Status Screen (AP Mode) (continued) LABEL DESCRIPTION Use this screen to view port status and packet specific statistics. Packet Statistics WLAN Station Status Use this screen to view the wireless stations that are currently associated to the NBG-418N. 4.3.2 AP Navigation Panel Use the menu in the navigation panel to configure NBG-418N features in AP Mode. The following screen and table show the features you can configure in AP Mode. Figure 32 Menu: AP Mode The following table describes the sub-menus. Table 20 Menu: AP Mode LINK Status TAB Network FUNCTION This screen shows the NBG-418Ns general device, system and interface status information. Use this screen to access the wizard, and summary statistics tables. Wireless LAN General Use this screen to configure wireless LAN. MAC Filter Use the MAC filter screen to configure the NBG-418N to block access to devices or block the devices from accessing the NBG-418N. Advanced This screen allows you to configure advanced wireless settings. QoS WPS Use this screen to configure Wi-Fi Multimedia Quality of Service (WMM QoS). WMM QoS allows you to prioritize wireless traffic according to the delivery requirements of individual services. Use this screen to configure WPS. WPS Station Use this screen to add a wireless station using WPS. Scheduling Use this screen to schedule the times the Wireless LAN is enabled. LAN IP Use this screen to configure LAN IP address and subnet mask. Maintenance System General Use this screen to view and change administrative settings such as system and domain names, password and inactivity timer. Time Setting Use this screen to change your NBG-418Ns time and date. NBG-418N Users Guide 47 Chapter 4 Modes Table 20 Menu: AP Mode (continued) LINK Logs Tools TAB View Log FUNCTION Use this screen to view the logs for the categories that you selected. Firmware Use this screen to upload firmware to your NBG-418N. Configuration Use this screen to backup and restore the configuration or reset the factory defaults to your NBG-418N. Restart This screen allows you to reboot the NBG-418N without turning the power off. Sys OP Mode General This screen allows you to select the device operation mode: Router, Access Point, Client Bridge or Universal Repeater. Language Language This screen allows you to select the language you prefer. 4.4 Setting your NBG-418N to Universal Repeater Mode 1 2 3 4 Connect your computer to the LAN port of the NBG-418N. The default LAN IP address of the NBG-418N is 192.168.1.1 in router mode (192.168.1.2 by default in non-router mode). In router mode, the NBG-418N can assign your computer an IP address, so you must set your computer to get an IP address automatically (computer factory default) or give it a fixed IP address in the range between 192.168.1.3 and 192.168.1.254. After youve set your computers IP address, open a web browser such as Internet Explorer and type the IP address of the NBG-418N as the web address in your web browser. Log into the Web Configurator. See the Chapter 2 on page 17 for instructions on how to do this. 5 Go to Maintenance > Sys OP Mode > General and select Universal Repeater. Figure 33 Maintenance > Sys OP Mode > Universal Repeater 6 A pop-up window window appears providing information on this mode. Click OK in the pop-up message window. Click Apply. Your NBG-418N is now in Universal Repeater mode. 48 NBG-418N Users Guide Chapter 4 Modes Note: Wait while the NBG-418N restarts, then log in to the Web Configurator again. 4.4.1 Status Screen (Universal Repeater Mode) Click on Status. The screen below shows the status screen in Universal Repeater Mode. Figure 34 Status Screen (Universal Repeater Mode) The following table describes the labels shown in the Status screen. Table 21 Status Screen (Universal Repeater Mode) LABEL Device Information DESCRIPTION System Name This is the System Name you enter in the Maintenance > System >

General screen. It is for identification purposes. Firmware Version This is the current firmware version of the NBG-418N. LAN Information

- MAC Address

- IP Address This shows the LAN Ethernet adapter MAC Address of your device. This shows the LAN ports IP address.

- IP Subnet Mask This shows the LAN ports subnet mask.

- DHCP This shows the LAN ports DHCP role. NBG-418N Users Guide 49 Chapter 4 Modes Table 21 Status Screen (Universal Repeater Mode) (continued) LABEL WLAN AP Information DESCRIPTION

- MAC Address This shows the wireless adapter MAC Address of your device.

- Status

- SSID

- Channel This shows the current status of the Wireless LAN - On, Off, or Off by scheduler. This shows a descriptive name used to identify the NBG-418N in the wireless LAN. This shows the channel number which you select manually or the NBG-418N automatically scans and selects.

- Operating Channel This shows the channel number which the NBG-418N is currently using over the wireless LAN.

- Security Mode

- 802.11 Mode

- WPS WLAN STA Information This shows the level of wireless security the NBG-418N is using. This shows the IEEE 802.11 standard that the NBG-418N supports. Wireless clients must support the same standard in order to be able to connect to the NBG-418N This shows the WPS (WiFi Protected Setup) Status. Click the link to display Network > Wireless LAN > WPS screen.

- SSID This is the name of the selected AP that the NBG-418N is associating with.

- Security Mode This shows the wireless security the NBG-418N is using to connect to the AP.

- Connection Status This shows whether the NBG-418N is currently associated with the selected AP. System Status Operation Mode This field shows the device operation mode: Router, Access Point, Client Bridge or Universal Repeater. System Up Time This is the total time the NBG-418N has been on. Current Date/Time This field displays your NBG-418Ns present date and time. System Resource

- CPU Usage This displays what percentage of the NBG-418Ns processing ability is currently used. When this percentage is close to 100%, the NBG-418N is running at full load, and the throughput is not going to improve anymore. If you want some applications to have more throughput, you should turn off other applications.

- Memory Usage This shows what percentage of the heap memory the NBG-418N is using. Interface Status Interface Status Rate Summary This displays the NBG-418N port types. The port types are: LAN and WLAN. For the LAN port, this field displays Down (line is down) or Up (line is up or connected). For the WLAN, it displays Up when the WLAN is enabled or Down when the WLAN is disabled. For the LAN ports, this displays the port speed and duplex setting or N/A when the line is disconnected. For the WLAN, it displays the maximum transmission rate when the WLAN is enabled and N/A when the WLAN is disabled. Packet Statistics Use this screen to view port status and packet specific statistics. WLAN Station Status Use this screen to view the wireless stations that are currently associated to the NBG-418N. 50 NBG-418N Users Guide Chapter 4 Modes 4.4.2 Universal Repeater Navigation Panel Use the menu in the navigation panel to configure NBG-418N features in Universal Repeater Mode. The following screen and table show the features you can configure in Universal Repeater Mode. Figure 35 Menu: Universal Repeater Mode The following table describes the sub-menus. Table 22 Menu: Universal Repeater Mode LINK Status TAB FUNCTION This screen shows the NBG-418Ns general device, system and interface status information. Use this screen to access the wizard, and summary statistics tables. Network WLAN AP Select Use this screen to choose an access point that you want the NBG-418N to connect to. You should know the security settings of the target AP. General MAC Filter Use this screen to configure wireless LAN. Use the MAC filter screen to configure the NBG-418N to block access to devices or block the devices from accessing the NBG-418N. Advanced This screen allows you to configure advanced wireless settings. QoS WPS Use this screen to configure Wi-Fi Multimedia Quality of Service (WMM QoS). WMM QoS allows you to prioritize wireless traffic according to the delivery requirements of individual services. Use this screen to configure WPS. WPS Station Use this screen to add a wireless station using WPS. Scheduling Use this screen to schedule the times the Wireless LAN is enabled. LAN IP Use this screen to configure LAN IP address and subnet mask. Maintenance System General Use this screen to view and change administrative settings such as system and domain names, password and inactivity timer. Time Setting Use this screen to change your NBG-418Ns time and date. Logs View Log Use this screen to view the logs for the categories that you selected. NBG-418N Users Guide 51 Chapter 4 Modes Table 22 Menu: Universal Repeater Mode (continued) LINK TAB Firmware FUNCTION Use this screen to upload firmware to your NBG-418N. Tools Configuration Use this screen to backup and restore the configuration or reset the factory defaults to your NBG-418N. Restart This screen allows you to reboot the NBG-418N without turning the power off. Sys OP Mode General This screen allows you to select the device operation mode: Router, Access Point, Client Bridge or Universal Repeater. Language Language This screen allows you to select the language you prefer. 4.5 Setting your NBG-418N to Client Bridge Mode 1 2 3 4 Connect your computer to the LAN port of the NBG-418N. The default LAN IP address of the NBG-418N is 192.168.1.1 in router mode (192.168.1.2 by default in non-router mode). In router mode, the NBG-418N can assign your computer an IP address, so you must set your computer to get an IP address automatically (computer factory default) or give it a fixed IP address in the range between 192.168.1.3 and 192.168.1.254. After youve set your computers IP address, open a web browser such as Internet Explorer and type the IP address of the NBG-418N as the web address in your web browser. Log into the Web Configurator. See the Chapter 2 on page 17 for instructions on how to do this. 5 Go to Maintenance > Sys OP Mode > General and select Client Bridge. Figure 36 Maintenance > Sys OP Mode > Client Bridge 6 A pop-up window appears providing information on this mode. Click OK in the pop-up message window. Click Apply. Your NBG-418N is now in Client Bridge mode. 52 NBG-418N Users Guide Chapter 4 Modes Note: Wait while the NBG-418N restarts, then log in to the Web Configurator again. 4.5.1 Status Screen (Client Bridge Mode) Click on Status. The screen below shows the status screen in Client Bridge Mode. Figure 37 Status Screen (Client Bridge Mode) The following table describes the labels shown in the Status screen. Table 23 Status Screen (Client Bridge Mode) LABEL Device Information DESCRIPTION System Name This is the System Name you enter in the Maintenance > System >

General screen. It is for identification purposes. Firmware Version This is the current firmware version of the NBG-418N. WLAN Information

- SSID This is the name of the selected AP that the NBG-418N is associating with.

- Operating Channel This shows the channel that is used to connect to the selected AP.

- Security Mode This shows the wireless security the NBG-418N is using to connect to the AP.

- Connection Status This shows whether the NBG-418N is currently associated with the selected AP. LAN Information

- MAC Address

- IP Address This shows the LAN Ethernet adapter MAC Address of your device. This shows the LAN ports IP address.

- IP Subnet Mask This shows the LAN ports subnet mask.

- DHCP System Status Operation Mode This shows the LAN ports DHCP role - None. This field shows the device operation mode: Router, Access Point, Client Bridge or Universal Repeater. System Up Time This is the total time the NBG-418N has been on. NBG-418N Users Guide 53 Chapter 4 Modes Table 23 Status Screen (Client Bridge Mode) (continued) LABEL DESCRIPTION This field displays your NBG-418Ns present date and time. Current Date/Time System Resource

- CPU Usage This displays what percentage of the NBG-418Ns processing ability is currently used. When this percentage is close to 100%, the NBG-418N is running at full load, and the throughput is not going to improve anymore. If you want some applications to have more throughput, you should turn off other applications.

- Memory Usage This shows what percentage of the heap memory the NBG-418N is using. Interface Status Interface Status Rate Summary This displays the NBG-418N port types. The port types are: LAN and WLAN. For the LAN port, this field displays Down (line is down) or Up (line is up or connected). For the WLAN, it displays Up when the WLAN is enabled or Down when the WLAN is disabled. For the LAN ports, this displays the port speed and duplex setting or N/A when the line is disconnected. For the WLAN, it displays the maximum transmission rate when the WLAN is enabled and N/A when the WLAN is disabled. Packet Statistics Use this screen to view port packet statistics. 4.5.2 Client Bridge Navigation Panel Use the menu in the navigation panel to configure NBG-418N features in Client Bridge Mode. The following screen and table show the features you can configure in Client Bridge Mode. Figure 38 Menu: Client Bridge Mode 54 NBG-418N Users Guide The following table describes the sub-menus. Chapter 4 Modes Table 24 Menu: Client Bridge Mode LINK Status TAB FUNCTION This screen shows the NBG-418Ns general device, system and interface status information. Use this screen to access the wizard, and summary statistics tables. Network WLAN AP Select Use this screen to choose an access point that you want the NBG-418N to connect to. You should know the security settings of the target AP. WLAN Information Use this screen to view the SSID and security of the selected AP wireless network. Advanced Use this screen to configure advanced wireless settings. LAN IP Use this screen to configure LAN IP address and subnet mask. Maintenance System General Use this screen to view and change administrative settings such as system and domain names, password and inactivity timer. Logs Tools Time Setting Use this screen to change your NBG-418Ns time and date. View Log Firmware Configuration Restart Use this screen to view the logs for the categories that you selected. Use this screen to upload firmware to your NBG-418N. Use this screen to backup and restore the configuration or reset the factory defaults to your NBG-418N. This screen allows you to reboot the NBG-418N without turning the power off. Sys OP Mode General This screen allows you to select whether your device acts as a Router, Access Point, Client Bridge or Universal Repeater. Language Language This screen allows you to select the language you prefer. NBG-418N Users Guide 55 Chapter 4 Modes 56 NBG-418N Users Guide CHAPTER 5 Tutorials 5.1 Overview This chapter provides tutorials for your NBG-418N as follows:

How to Connect to the Internet from an AP Configure Wireless Security Using WPS on both your NBG-418N and Wireless Client Enable and Configure Wireless Security without WPS on your NBG-418N 5.2 How to Connect to the Internet from an AP This section gives you an example of how to set up an access point (AP) and wireless client (a notebook, B in this example) for wireless communication. B can access the Internet through the AP wirelessly. Figure 39 Wireless AP Connection to the Internet B AP 5.2.1 Configure Wireless Security Using WPS on both your NBG-418N and Wireless Client This section gives you an example of how to set up wireless network using WPS. This example uses the NBG-418N as the AP and NWD210N as the wireless client which connects to a notebook. Note: The wireless client must be a WPS-aware device (for example, a WPS USB adapter or PCI card). There are two WPS methods for creating a secure connection. This tutorial shows you how to do both. Push Button Configuration (PBC) - create a secure wireless network simply by pressing a button. See Section 5.2.1.1 on page 58.This is the easier method. PIN Configuration - create a secure wireless network simply by entering a wireless client's PIN

(Personal Identification Number) in the NBG-418Ns interface. See Section 5.2.1.2 on page 59. This is the more secure method, since one device can authenticate the other. NBG-418N Users Guide 57 Chapter 5 Tutorials 5.2.1.1 Push Button Configuration (PBC) 1 Make sure that your NBG-418N is turned on and that it is within range of your computer. 2 Make sure that you have installed the wireless client (this example uses the NWD210N) driver and utility in your notebook. 3 4 In the wireless client utility, find the WPS settings. Enable WPS and press the WPS button (Start or WPS button) Log into NBG-418Ns Web Configurator and press Push Button in the Network > Wireless LAN >

WPS Station screen. Note: Your NBG-418N has a WPS button located on its panel, as well as a WPS button in its configuration utility. Both buttons have exactly the same function; you can use one or the other. Note: It doesnt matter which button is pressed first. You must press the second button within two minutes of pressing the first one. The NBG-418N sends the proper configuration settings to the wireless client. This may take up to two minutes. Then the wireless client is able to communicate with the NBG-418N securely. The following figure shows you an example to set up wireless network and security by pressing a button on both NBG-418N and wireless client (the NWD210N in this example). 58 NBG-418N Users Guide Figure 40 Example WPS Process: PBC Method Wireless Client NBG-418N Chapter 5 Tutorials WITHIN 2 MINUTES SECURITY INFO COMMUNICATION 5.2.1.2 PIN Configuration When you use the PIN configuration method, you need to use both NBG-418Ns configuration interface and the clients utilities. 1 2 3 Launch your wireless clients configuration utility. Go to the WPS settings and select the PIN method to get a PIN number. Enter the PIN number to the PIN field in the Network > Wireless LAN > WPS Station screen on the NBG-418N. Click the Start buttons (or button next to the PIN field) on both the wireless client utility screen and the NBG-418Ns WPS Station screen within two minutes. The NBG-418N authenticates the wireless client and sends the proper configuration settings to the wireless client. This may take up to two minutes. Then the wireless client is able to communicate with the NBG-418N securely. The following figure shows you the example to set up wireless network and security on NBG-418N and wireless client (ex. NWD210N in this example) by using PIN method. NBG-418N Users Guide 59 Chapter 5 Tutorials Figure 41 Example WPS Process: PIN Method Wireless Client NBG-418N WITHIN 2 MINUTES Authentication by PIN SECURITY INFO COMMUNICATION 60 NBG-418N Users Guide 5.3 Enable and Configure Wireless Security without WPS on your NBG-418N This example shows you how to configure wireless security settings with the following parameters on your NBG-418N. Chapter 5 Tutorials SSID Channel Security SSID_Example3 6 WPA-PSK

(Pre-Shared Key: ThisismyWPA-PSKpre-sharedkey) Follow the steps below to configure the wireless settings on your NBG-418N. The instructions require that your hardware is connected (see the Quick Start Guide) and you are logged into the Web Configurator through your LAN connection (see Section 2.2 on page 17). 1 Open the Wireless LAN > General screen in the NBG-418Ns Web Configurator. 2 Make sure the Enable Wireless LAN check box is selected. 3 4 Enter SSID_Example3 as the SSID and select a channel. Set security mode to WPA-PSK and enter ThisismyWPA-PSKpre-sharedkey in the Pre-Shared Key field. Click Apply. Figure 42 Tutorial: Network > Wireless LAN > General 5 Open the Status screen. Verify your wireless and wireless security settings under Device Information and check if the WLAN connection is up under Interface Status. NBG-418N Users Guide 61 Chapter 5 Tutorials Figure 43 Tutorial: Status Screen 5.3.0.1 Configure Your Notebook Note: We use the ZyXEL M-302 wireless adapter utility screens as an example for the wireless client. The screens may vary for different models. 1 The NBG-418N supports IEEE 802.11b, IEEE 802.11g and IEEE 802.11n wireless clients. Make sure that your notebook or computers wireless adapter supports one of these standards. 2 Wireless adapters come with software sometimes called a utility that you install on your computer. See your wireless adapters Users Guide for information on how to do that. 3 4 62 After youve installed the utility, open it. If you cannot see your utilitys icon on your screen, go to Start > Programs and click on your utility in the list of programs that appears. The utility displays a list of APs within range, as shown in the example screen below. Select SSID_Example3 and click Connect. NBG-418N Users Guide Figure 44 Connecting a Wireless Client to a Wireless Network t Chapter 5 Tutorials 5 6 7 Select WPA-PSK and type the security key in the following screen. Click Next. Figure 45 Security Settings The Confirm Save window appears. Check your settings and click Save to continue. Figure 46 Confirm Save Check the status of your wireless connection in the screen below. If your wireless connection is weak or you have no connection, see the Troubleshooting section of this Users Guide. NBG-418N Users Guide 63 Chapter 5 Tutorials Figure 47 Link Status If your connection is successful, open your Internet browser and enter http://www.zyxel.com or the URL of any other web site in the address bar. If you are able to access the web site, your wireless connection is successfully configured. 64 NBG-418N Users Guide PART II Technical Reference 65 66 CHAPTER 6 Wireless LAN 6.1 Overview This chapter discusses how to configure the wireless network settings in your NBG-418N. See the appendices for more detailed information about wireless networks. The following figure provides an example of a wireless network. Figure 48 Example of a Wireless Network The wireless network is the part in the blue circle. In this wireless network, devices A and B are called wireless clients. The wireless clients use the access point (AP) to interact with other devices

(such as the printer) or with the Internet. Your NBG-418N is the AP in the above example. NBG-418N Users Guide 67 Chapter 6 Wireless LAN 6.2 What You Can Do Wireless screens vary according to the device mode you are using. Wireless Screen Router General MAC Filter Advanced QoS WPS WPS Station Scheduling AP Select WLAN Info Access Point Universal Repeater Client Bridge See Chapter 4 on page 35 for more information on device modes. Use the General screen to enable the Wireless LAN, enter the SSID and select the wireless security mode (Section 6.4 on page 70). Use the MAC Filter screen to allow or deny wireless stations based on their MAC addresses from connecting to the NBG-418N (Section 6.5 on page 75). Use the Advanced screen to allow intra-BSS networking and set the RTS/CTS Threshold (Section 6.6 on page 76). Use the QoS screen to enable Wifi MultiMedia Quality of Service (WMMQoS). This allows the NBG-418N to automatically set priority levels to services, such as e-mail, VoIP, chat, and so on

(Section 6.7 on page 78). Use the WPS screen to quickly set up a wireless network with strong security, without having to configure security settings manually (Section 6.8 on page 79). Use the WPS Station screen to add a wireless station using WPS (Section 6.9 on page 80). Use the Scheduling screen to set the times your wireless LAN is turned on and off (Section 6.10 on page 81). Use the AP Select screen to choose an access point that you want the NBG-418N (in universal repeater or client bridge mode) to connect to. You should know the security settings of the target AP. Use the WLAN Info screen to view the SSID and security of the selected AP wireless network. 68 NBG-418N Users Guide Chapter 6 Wireless LAN 6.3 What You Should Know Every wireless network must follow these basic guidelines. Every wireless client in the same wireless network must use the same SSID. The SSID is the name of the wireless network. It stands for Service Set IDentity. If two wireless networks overlap, they should use different channels. Like radio stations or television channels, each wireless network uses a specific channel, or frequency, to send and receive information. Every wireless client in the same wireless network must use security compatible with the AP. Security stops unauthorized devices from using the wireless network. It can also protect the information that is sent in the wireless network. 6.3.1 Wireless Security Overview The following sections introduce different types of wireless security you can set up in the wireless network. 6.3.1.1 SSID Normally, the AP acts like a beacon and regularly broadcasts the SSID in the area. You can hide the SSID instead, in which case the AP does not broadcast the SSID. In addition, you should change the default SSID to something that is difficult to guess. This type of security is fairly weak, however, because there are ways for unauthorized devices to get the SSID. In addition, unauthorized devices can still see the information that is sent in the wireless network. 6.3.1.2 MAC Address Filter Every wireless client has a unique identification number, called a MAC address.1 A MAC address is usually written using twelve hexadecimal characters2; for example, 00A0C5000002 or 00:A0:C5:00:00:02. To get the MAC address for each wireless client, see the appropriate Users Guide or other documentation. You can use the MAC address filter to tell the AP which wireless clients are allowed or not allowed to use the wireless network. If a wireless client is allowed to use the wireless network, it still has to have the correct settings (SSID, channel, and security). If a wireless client is not allowed to use the wireless network, it does not matter if it has the correct settings. This type of security does not protect the information that is sent in the wireless network. Furthermore, there are ways for unauthorized devices to get the MAC address of an authorized wireless client. Then, they can use that MAC address to use the wireless network. 1. Some wireless devices, such as scanners, can detect wireless networks but cannot use wireless networks. These kinds of wireless devices might not have MAC addresses. 2. Hexadecimal characters are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F. NBG-418N Users Guide 69 Chapter 6 Wireless LAN 6.3.1.3 Encryption Wireless networks can use encryption to protect the information that is sent in the wireless network. Encryption is like a secret code. If you do not know the secret code, you cannot understand the message. Table 25 Types of Encryption for Each Type of Authentication Weakest NO AUTHENTICATION No Security Static WEP WPA-PSK Strongest WPA2-PSK For example, if users do not log in to the wireless network, you can choose no encryption, Static WEP, WPA-PSK, or WPA2-PSK. Usually, you should set up the strongest encryption that every wireless client in the wireless network supports. Suppose the wireless network has two wireless clients. Device A only supports WEP, and device B supports WEP and WPA-PSK. Therefore, you should set up Static WEP in the wireless network. Note: It is recommended that wireless networks use WPA-PSK, or stronger encryption. IEEE 802.1x and WEP encryption are better than none at all, but it is still possible for unauthorized devices to figure out the original information pretty quickly. When you select WPA2-PSK in your NBG-418N, you can also select an option (WPA Compatible) to support WPA-PSK as well. In this case, if some wireless clients support WPA-PSK and some support WPA2-PSK, you should set up WPA2-PSK and select the WPA Compatible option in the NBG-418N. Many types of encryption use a key to protect the information in the wireless network. The longer the key, the stronger the encryption. Every wireless client in the wireless network must have the same key. 6.3.1.4 WPS WiFi Protected Setup (WPS) is an industry standard specification, defined by the WiFi Alliance. WPS allows you to quickly set up a wireless network with strong security, without having to configure security settings manually. Depending on the devices in your network, you can either press a button (on the device itself, or in its configuration utility) or enter a PIN (Personal Identification Number) in the devices. Then, they connect and set up a secure network by themselves. See how to set up a secure wireless network using WPS in the Section 5.2.1 on page 57. 6.4 General Wireless LAN Screen Use this screen to enable the Wireless LAN, enter the SSID and select the wireless security mode. 70 NBG-418N Users Guide Chapter 6 Wireless LAN Note: If you are configuring the NBG-418N from a computer connected to the wireless LAN and you change the NBG-418Ns SSID, channel or security settings, you will lose your wireless connection when you press Apply to confirm. You must then change the wireless settings of your computer to match the NBG-418Ns new settings. Click Network > Wireless LAN to open the General screen. Figure 49 Network > Wireless LAN > General (Router or Access Point Mode) Figure 50 Network > Wireless LAN > General (Universal Repeater Mode) NBG-418N Users Guide 71 Chapter 6 Wireless LAN The following table describes the general wireless LAN labels in this screen. Table 26 Network > Wireless LAN > General LABEL WLAN STA Information DESCRIPTION This section is available only when the NBG-418N is in universal repeater mode. This shows the wireless and security settings of the selected AP wireless network. SSID This displays the Service Set IDentity of the wireless device to which you are connecting. Security Mode This displays the type of security configured on the wireless device to which you are connecting. Operating Channel WLAN AP Information /

Wireless Setup Enable Wireless LAN Name(SSID) Hide SSID Channel Selection Auto Channel Selection Operating Channel Channel Width This displays the channel used by the wireless device to which you are connecting. Use this section to configure the wireless settings between the NBG-418Nand its wireless clients. Click the check box to activate wireless LAN.

(Service Set IDentity) The SSID identifies the Service Set with which a wireless station is associated. Wireless stations associating to the access point (AP) must have the same SSID. Enter a descriptive name (up to 32 printable 7-bit ASCII characters) for the wireless LAN. Select this check box to hide the SSID in the outgoing beacon frame so a station cannot obtain the SSID through scanning using a site survey tool. Set the operating frequency/channel depending on your particular region. Select a channel from the drop-down list box. The options vary depending on the frequency band and the country you are in. Refer to the Connection Wizard chapter for more information on channels. This option is only available if Auto Channel Selection is disabled. Select this option for the NBG-418N to automatically choose the channel with the least interference. Deselect this option if you wish to manually select the channel using the Channel Selection field. This displays the channel the NBG-418N is currently using. Select whether the NBG-418N uses a wireless channel width of 20MHz, 40MHz or Auto 20/40MHz. A standard 20MHz channel offers transfer speeds of up to 150Mbps whereas a 40MHz channel uses two standard channels and offers speeds of up to 300 Mbps. Because not all devices support 40MHz channels, select Auto 20/40MHz to allow the NBG-418N to adjust the channel bandwidth automatically. Security Use this section to configure the wireless security between the NBG-418N and its wireless clients. Security Mode Select Static WEP, WPA-PSK or WPA2-PSK to add security on this wireless network. The wireless clients which want to associate to this network must have same wireless security settings as this device. After you select to use a security, additional options appears in this screen. See 6.4.2 and 6.4.3 sections. Or you can select No Security to allow any client to associate this network without authentication. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to reload the previous configuration for this screen. See the rest of this chapter for information on the other labels in this screen. 6.4.1 No Security Select No Security to allow wireless stations to communicate with the access points without any data encryption. 72 NBG-418N Users Guide Note: If you do not enable any wireless security on your NBG-418N, your network is accessible to any wireless networking device that is within range. Figure 51 Network > Wireless LAN > General: No Security Chapter 6 Wireless LAN The following table describes the labels in this screen. Table 27 Network > Wireless LAN > General: No Security LABEL Security Mode DESCRIPTION Choose No Security from the drop-down list box. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to reload the previous configuration for this screen. 6.4.2 WEP Encryption WEP encryption scrambles the data transmitted between the wireless stations and the access points to keep network communications private. It encrypts unicast and multicast communications in a network. Both the wireless stations and the access points must use the same WEP key. Your NBG-418N allows you to configure up to four 64-bit or 128-bit WEP keys but only one key can be enabled at any one time. In order to configure and enable WEP encryption; click Network > Wireless LAN to display the General screen. Select Static WEP from the Security Mode list. Figure 52 Network > Wireless LAN > General: Static WEP NBG-418N Users Guide 73 Chapter 6 Wireless LAN The following table describes the wireless LAN security labels in this screen. Table 28 Network > Wireless LAN > General: Static WEP LABEL Security Mode DESCRIPTION Choose Static WEP from the drop-down list box. WEP Encryption Select 64-bit WEP or 128-bit WEP to enable data encryption. Authentication Method Select Auto, Open System or Shared Key from the drop-down list box. This field specifies whether the wireless clients have to provide the WEP key to login to the wireless client. Keep this setting at Auto or Open System unless you want to force a key verification before communication between the wireless client and the ZyXEL Device occurs. Select Shared Key to force the clients to provide the WEP key prior to communication. ASCII Hex Select this option in order to enter ASCII characters as WEP key. Select this option in order to enter hexadecimal characters as a WEP key. The preceding "0x", that identifies a hexadecimal key, is entered automatically. Key 1 to Key 4 The WEP keys are used to encrypt data. Both the NBG-418N and the wireless stations must use the same WEP key for data transmission. If you chose 64-bit WEP, then enter any 5 ASCII characters or 10 hexadecimal characters

("0-9", "A-F"). If you chose 128-bit WEP, then enter 13 ASCII characters or 26 hexadecimal characters

("0-9", "A-F"). You must configure at least one key, only one key can be activated at any one time. The default key is key 1. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to reload the previous configuration for this screen. 6.4.3 WPA-PSK/WPA2-PSK Click Network > Wireless LAN to display the General screen. Select WPA-PSK or WPA2-PSK from the Security Mode list. Figure 53 Network > Wireless LAN > General: WPA-PSK/WPA2-PSK 74 NBG-418N Users Guide Chapter 6 Wireless LAN The following table describes the labels in this screen. Table 29 Network > Wireless LAN > General: WPA-PSK/WPA2-PSK LABEL Security Mode DESCRIPTION Choose WPA-PSK or WPA2-PSK from the drop-down list box. WPA Compatible This option is available only when you select WPA2-PSK in the Security Mode field. Select this option to have both WPA2 and WPA wireless clients be able to communicate with the NBG-418N even when the NBG-418N is using WPA2-PSK. Cipher Type Select the encryption type (TKIP, AES or TKIP+AES) for data encryption. Select AES if your wireless clients can all use AES. Otherwise, select TKIP or select TKIP+AES to allow the wireless clients to use either TKIP or AES. Pre-Shared Key WPA-PSK/WPA2-PSK uses a simple common password for authentication. Group Key Update Timer Type a pre-shared key from 8 to 63 case-sensitive ASCII characters (including spaces and symbols). Type a pre-shared key less than 64 case-sensitive HEX characters ("0-9", "A-F"). The Group Key Update Timer is the rate at which the AP (if using WPA-PSK/WPA2-

PSK key management) or RADIUS server (if using WPA/WPA2 key management) sends a new group key out to all clients. The re-keying process is the WPA/WPA2 equivalent of automatically changing the WEP key for an AP and all stations in a WLAN on a periodic basis. Setting of the Group Key Update Timer is also supported in WPA-PSK/WPA2-

PSK mode. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to reload the previous configuration for this screen. 6.5 MAC Filter The MAC filter screen allows you to configure the NBG-418N to give exclusive access to up to 16 devices (Allow) or exclude up to 16 devices from accessing the NBG-418N (Deny). Every Ethernet device has a unique MAC (Media Access Control) address. The MAC address is assigned at the factory and consists of six pairs of hexadecimal characters, for example, 00:A0:C5:00:00:02. You need to know the MAC address of the devices to configure this screen. To change your NBG-418Ns MAC filter settings, click Network > Wireless LAN > MAC Filter. The screen appears as shown. NBG-418N Users Guide 75 Chapter 6 Wireless LAN Figure 54 Network > Wireless LAN > MAC Filter The following table describes the labels in this menu. Table 30 Network > Wireless LAN > MAC Filter LABEL Active DESCRIPTION Select Yes from the drop down list box to enable MAC address filtering. Filter Action Define the filter action for the list of MAC addresses in the MAC Address table. Select Deny to block access to the NBG-418N, MAC addresses not listed will be allowed to access the NBG-418N. Select Allow to permit access to the NBG-418N, MAC addresses not listed will be denied access to the NBG-418N. Set This is the index number of the MAC address. MAC Address Enter the MAC addresses of the wireless station that are allowed or denied access to the NBG-418N in these address fields. Enter the MAC addresses in a valid MAC address format, that is, six hexadecimal character pairs, for example, 12:34:56:78:9a:bc. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to reload the previous configuration for this screen. 6.6 Wireless LAN Advanced Screen Use this screen to allow intra-BSS networking and set the RTS/CTS Threshold. Click Network > Wireless LAN > Advanced. The screen appears as shown. 76 NBG-418N Users Guide Figure 55 Network > Wireless LAN > Advanced (Universal Repeater Mode) Chapter 6 Wireless LAN The following table describes the labels in this screen. Table 31 Network > Wireless LAN > Advanced LABEL Wireless Advanced Setup DESCRIPTION RTS/CTS Threshold Data with its frame size larger than this value will perform the RTS (Request To Send)/

CTS (Clear To Send) handshake. Fragmentation Threshold Beacon Interval DTIM Period Enter a value between 0 and 2347. The threshold (number of bytes) for the fragmentation boundary for directed messages. It is the maximum data fragment size that can be sent. Enter an even number between 256 and 2346. When a wirelessly networked device sends a beacon, it includes with it a beacon interval. This specifies the time period before the device sends the beacon again. The interval tells receiving devices on the network how long they can wait in low-power mode before waking up to handle the beacon. This value can be set from 20 to 1024 ms. A high value helps save current consumption of the access point. Delivery Traffic Indication Message (DTIM) is the time period after which broadcast and multicast packets are transmitted to mobile clients in the Active Power Management mode. A high DTIM value can cause clients to lose connectivity with the network. This value can be set from 1 to 10. Preamble Type A preamble affects the timing in your wireless network. There are two preamble modes:

long and short. If a device uses a different preamble mode than the NBG-418N does, it cannot communicate with the NBG-418N. CTS Protection When set to None, the NBG-418N protects wireless communication against interference. Tx Power Select Auto to let the NBG-418N determine whether to turn this feature on or off in the current environment. This field controls the transmission power of the NBG-418N. When using the NBG-418N with a notebook computer, select a lower transmission power level when you are close to the AP in order to conserve battery power. NBG-418N Users Guide 77 Chapter 6 Wireless LAN Table 31 Network > Wireless LAN > Advanced (continued) LABEL Extension Channel DESCRIPTION If you select 40 MHz or Auto 20/40MHz as your Channel Bandwidth in the Wireless LAN > General screen, the extension channel enables the NBG-419N to get higher data throughput. This also lowers radio interference and traffic. Aggregation Message Protocol Data Unit (MPDU) aggregation collects Ethernet frames along with their 802.11n headers and wraps them in a 802.11n MAC header. This method is useful for increasing bandwidth throughput in environments that are prone to high error rates. Short GI Mac Service Data Unit (MSDU) aggregation collects Ethernet frames without any of their 802.11n headers and wraps the header-less payload in a single 802.11n MAC header. This method is useful for increasing bandwidth throughput. It is also more efficient than A-MPDU except in environments that are prone to high error rates. Select Enable to use Short GI (Guard Interval). The guard interval is the gap introduced between data transmission from users in order to reduce interference. Reducing the GI increases data transfer rates but also increases interference. Increasing the GI reduces data transfer rates but also reduces interference. Enable Intra-BSS Traffic A Basic Service Set (BSS) exists when all communications between wireless clients or between a wireless client and a wired network client go through one access point (AP). WLAN STA setting overwrites WLAN AP setting Intra-BSS traffic is traffic between wireless clients in the BSS. When Intra-BSS is enabled, wireless client A and B can access the wired network and communicate with each other. When Intra-BSS is disabled, wireless client A and B can still access the wired network but cannot communicate with each other. This field is available only when the NBG-418N is in universal repeater mode. Select Enabled to have the NBG-418N copy the SSID and wireless security settings of the associated AP, and use them for wireless connections between the NBG-418N and its wireless clients. Otherwise, select Disabled to configure different wireless and security settings for wireless connections between the NBG-418N and its wireless clients. Apply Reset Click Apply to save your changes to the NBG-418N. Click Reset to reload the previous configuration for this screen. 6.7 Quality of Service (QoS) Screen Use the QoS screen to enable Wifi MultiMedia Quality of Service (WMMQoS). This allows the NBG-

418N to automatically set priority levels to services, such as e-mail, VoIP, chat, and so on. Click Network > Wireless LAN > QoS. The following screen appears. Figure 56 Network > Wireless LAN > QoS 78 NBG-418N Users Guide Chapter 6 Wireless LAN The following table describes the labels in this screen. Table 32 Network > Wireless LAN > QoS LABEL Enable WMM QoS DESCRIPTION Check this to have the NBG-418N automatically give a service a priority level according to the ToS value in the IP header of packets it sends. WMM QoS (Wifi MultiMedia Quality of Service) gives high priority to voice and video, which makes them run more smoothly. Apply Reset Click Apply to save your changes to the NBG-418N. Click Reset to reload the previous configuration for this screen. 6.8 WPS Screen Use this screen to enable/disable WPS, view or generate a new PIN number and check current WPS status. To open this screen, click Network > Wireless LAN > WPS tab. Figure 57 Network > Wireless LAN > WPS The following table describes the labels in this screen. Table 33 Network > Wireless LAN > WPS LABEL WPS Setup DESCRIPTION Enable WPS PIN Number WPS Status Status Select this to enable the WPS feature. This displays a PIN number last time system generated. Click Generate to generate a new PIN number. This displays Configured when the NBG-418N has connected to a wireless network using WPS or when Enable WPS is selected and wireless or wireless security settings have been changed. The current wireless and wireless security settings also appear in the screen. This displays Unconfigured if WPS is disabled and there are no wireless or wireless security changes on the NBG-418N or you click Release_Configuration to remove the configured wireless and wireless security settings. NBG-418N Users Guide 79 Chapter 6 Wireless LAN Table 33 Network > Wireless LAN > WPS (continued) LABEL Release Configuration DESCRIPTION This button is only available when the WPS status displays Configured. Click this button to remove all configured wireless and wireless security settings for WPS connections on the NBG-418N. Apply Refresh Click Apply to save your changes back to the NBG-418N. Click Refresh to get this screen information afresh. 6.9 WPS Station Screen Use this screen when you want to add a wireless station using WPS. To open this screen, click Network > Wireless LAN > WPS Station tab. Note: Note: After you click Push Button on this screen, you have to press a similar button in the wireless station utility within 2 minutes. To add the second wireless station, you have to press these buttons on both device and the wireless station again after the first 2 minutes. Figure 58 Network > Wireless LAN > WPS Station The following table describes the labels in this screen. Table 34 Network > Wireless LAN > WPS Station LABEL Push Button DESCRIPTION Use this button when you use the PBC (Push Button Configuration) method to configure wireless stationss wireless settings. See Section 5.2.1.1 on page 58. Click this to start WPS-aware wireless station scanning and the wireless security information synchronization. Or input stations PIN number Use this button when you use the PIN Configuration method to configure wireless stations wireless settings. See Section 5.2.1.2 on page 59. Type the same PIN number generated in the wireless stations utility. Then click Start to associate to each other and perform the wireless security information synchronization. 80 NBG-418N Users Guide Chapter 6 Wireless LAN 6.10 Scheduling Screen Use this screen to set the times your wireless LAN is turned on and off. Wireless LAN scheduling is disabled by default. The wireless LAN can be scheduled to turn on or off on certain days and at certain times. To open this screen, click Network > Wireless LAN > Scheduling tab. Figure 59 Network > Wireless LAN > Scheduling The following table describes the labels in this screen. Table 35 Network > Wireless LAN > Scheduling LABEL Enable Wireless LAN Scheduling DESCRIPTION Select this to enable Wireless LAN scheduling. Action Day Except for the following times Select On or Off to specify whether the Wireless LAN is turned on or off. This field works in conjunction with the Day and Except for the following times fields. Select Everyday or the specific days to turn the Wireless LAN on or off. If you select Everyday you can not select any specific days. This field works in conjunction with the Except for the following times field. Select a begin time using the first set of hour and minute (min) drop down boxes and select an end time using the second set of hour and minute (min) drop down boxes. If you have chosen On earlier for the WLAN Status the Wireless LAN will turn off between the two times you enter in these fields. If you have chosen Off earlier for the WLAN Status the Wireless LAN will turn on between the two times you enter in these fields. Apply Reset Note: Entering the same begin time and end time will mean the whole day. Click Apply to save your changes back to the NBG-418N. Click Reset to reload the previous configuration for this screen. NBG-418N Users Guide 81 Chapter 6 Wireless LAN 6.11 AP Select Screen Use this screen to choose an access point that you want the NBG-418N (in universal repeater or client bridge mode) to connect to. You should know the security settings of the target AP. To open this screen, click Network > Wireless LAN > AP Select tab. Figure 60 Network > Wireless LAN > AP Select The following table describes the labels in this screen. Table 36 Network > Wireless LAN > AP Select LABEL Select DESCRIPTION Use the radio button to select the wireless device to which you want to connect. SSID BSSID Channel Mode This displays the Service Set IDentity of the wireless device. The SSID is a unique name that identifies a wireless network. All devices in a wireless network must use the same SSID. This displays the MAC address of the wireless device. This displays the channel number used by this wireless device. This displays which IEEE 802.11b/g/n wireless networking standards the wireless device supports. Security Mode This displays the type of security configured on the wireless device. OPEN means no security is configured and you can connect to it without a password. Strength This displays the strength of the wireless signal. The signal strength mainly depends on the antenna output power and the distance between your NBG-418N and this device. 82 NBG-418N Users Guide Chapter 6 Wireless LAN Table 36 Network > Wireless LAN > AP Select (continued) LABEL Refresh DESCRIPTION Click this button to search for available wireless devices within transmission range and update this table. Connect Click this button to associate to the selected wireless device. 6.12 WLAN Info Screen Use this screen to view the SSID and security of the selected AP wireless network when the NBG-

418N is in client bridge mode. To open this screen, click Network > Wireless LAN > WLAN Info tab. Figure 61 Network > Wireless LAN > WLAN Info The following table describes the labels in this screen. Table 37 Network > Wireless LAN > WLAN Info LABEL WLAN DESCRIPTION SSID This displays the Service Set IDentity of the selected wireless device. Security Mode This displays the type of security configured on the selected wireless device. NBG-418N Users Guide 83 Chapter 6 Wireless LAN 84 NBG-418N Users Guide CHAPTER 7 WAN 7.1 Overview This chapter discusses the NBG-418Ns WAN screens. Use these screens to configure your NBG-

418N for Internet access. A WAN (Wide Area Network) connection is an outside connection to another network or the Internet. It connects your private networks (such as a LAN (Local Area Network) and other networks, so that a computer in one location can communicate with computers in other locations. Figure 62 LAN and WAN See the chapter about the connection wizard for more information on the fields in the WAN screens. 7.2 What You Need To Know The information in this section can help you configure the screens for your WAN connection, as well as enable/disable some advanced features of your NBG-418N. 7.2.1 Configuring Your Internet Connection Encapsulation Method Encapsulation is used to include data from an upper layer protocol into a lower layer protocol. To set up a WAN connection to the Internet, you need to use the same encapsulation method used by your ISP (Internet Service Provider). If your ISP offers a dial-up Internet connection using PPPoE (PPP over Ethernet) or PPTP (Point-to-Point Tunneling Protocol), they should also provide a username and password (and service name) for user authentication. NBG-418N Users Guide 85 Chapter 7 WAN WAN IP Address The WAN IP address is an IP address for the NBG-418N, which makes it accessible from an outside network. It is used by the NBG-418N to communicate with other devices in other networks. It can be static (fixed) or dynamically assigned by the ISP each time the NBG-418N tries to access the Internet. If your ISP assigns you a static WAN IP address, they should also assign you the subnet mask and DNS server IP address(es) (and a gateway IP address if you use the Ethernet or ENET ENCAP encapsulation method). DNS Server Address Assignment Use Domain Name System (DNS) to map a domain name to its corresponding IP address and vice versa, for instance, the IP address of www.zyxel.com is 204.217.0.2. The DNS server is extremely important because without it, you must know the IP address of a computer before you can access it. The NBG-418N can get the DNS server addresses in the following ways. 1 2 The ISP tells you the DNS server addresses, usually in the form of an information sheet, when you sign up. If your ISP gives you DNS server addresses, manually enter them in the DNS server fields. If your ISP dynamically assigns the DNS server IP addresses (along with the NBG-418Ns WAN IP address), set the DNS server fields to get the DNS server address from the ISP. WAN MAC Address The MAC address screen allows users to configure the WAN port's MAC address by either using the factory default or cloning the MAC address from a computer on your LAN. Choose Factory Default to select the factory assigned default MAC Address. Otherwise, click Clone the computer's MAC address - IP Address and enter the IP address of the computer on the LAN whose MAC you are cloning. Once it is successfully configured, the address will be copied to configuration file. It is recommended that you clone the MAC address prior to hooking up the WAN Port. 7.3 Internet Connection Use this screen to change your NBG-418Ns Internet access settings. Click Network > WAN. The screen differs according to the encapsulation you choose. 7.3.1 Ethernet Encapsulation This screen displays when you select Ethernet encapsulation. 86 NBG-418N Users Guide Figure 63 Network > WAN > Internet Connection: Ethernet Encapsulation Chapter 7 WAN The following table describes the labels in this screen. Table 38 Network > WAN > Internet Connection: Ethernet Encapsulation DESCRIPTION LABEL ISP Parameters for Internet Access Connection Type You must choose the Ethernet option when the WAN port is used as a regular Ethernet. WAN IP Address Assignment Get automatically from ISP Select this option If your ISP did not assign you a fixed IP address. This is the default selection. Use fixed IP Address IP Address IP Subnet Mask Gateway IP Address MTU Auto MTU DNS Servers Select this option If the ISP assigned a fixed IP address. Enter your WAN IP address in this field if you selected Use Fixed IP Address. Enter the IP Subnet Mask in this field. Enter a Gateway IP Address (if your ISP gave you one) in this field. Select Auto if you want to have the Maximum Transmission Unit (MTU) automatically configured. Select Manual if you want to enter the MTU manually in the field below. Enter the MTU or the largest packet size per frame that your NBG-418N can receive and process. NBG-418N Users Guide 87 Chapter 7 WAN Table 38 Network > WAN > Internet Connection: Ethernet Encapsulation (continued) LABEL First DNS Server DESCRIPTION Select From ISP if your ISP dynamically assigns DNS server information (and the NBG-

418Ns WAN IP address). The field to the right displays the (read-only) DNS server IP address that the ISP assigns. Second DNS Server Select User-Defined if you have the IP address of a DNS server. Enter the primary and secondary DNS server's IP address in the fields to the right. WAN MAC Address The MAC address section allows users to configure the WAN port's MAC address by either using the NBG-418Ns MAC address, copying the MAC address from a computer on your LAN or manually entering a MAC address. Factory default Select Factory default to use the factory assigned default MAC Address. Clone the computer's MAC address - MAC Address Set WAN MAC Address Apply Reset Select this option to clone the MAC address of the computer (displaying in the screen) from which you are configuring the NBG-418N. Once it is successfully configured, the address will be copied to the rom file. It will not change unless you change the setting or upload a different ROM file. Select this option and enter the MAC address you want to use. Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. 7.3.2 PPPoE Encapsulation The NBG-418N supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is an IETF standard

(RFC 2516) specifying how a personal computer (PC) interacts with a broadband modem (DSL, cable, wireless, etc.) connection. The PPP over Ethernet option is for a dial-up connection using PPPoE. For the service provider, PPPoE offers an access and authentication method that works with existing access control systems (for example Radius). One of the benefits of PPPoE is the ability to let you access one of multiple network services, a function known as dynamic service selection. This enables the service provider to easily create and offer new IP services for individuals. Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as it requires no specific configuration of the broadband modem at the customer site. By implementing PPPoE directly on the NBG-418N (rather than individual computers), the computers on the LAN do not need PPPoE software installed, since the NBG-418N does that part of the task. Furthermore, with NAT, all of the LANs computers will have access. 88 NBG-418N Users Guide This screen displays when you select PPPoE encapsulation. Figure 64 Network > WAN > Internet Connection: PPPoE Encapsulation Chapter 7 WAN The following table describes the labels in this screen. Table 39 Network > WAN > Internet Connection: PPPoE Encapsulation DESCRIPTION LABEL ISP Parameters for Internet Access Connection Type Select PPP over Ethernet if you connect to your Internet via dial-up. Service Name Type the PPPoE service name provided to you. PPPoE uses a service name to identify and reach the PPPoE server. User Name Type the user name given to you by your ISP. Password Retype to Confirm MTU Size Nailed-Up Connection Idle Timeout DNS Servers Type the password associated with the user name above. Type your password again to make sure that you have entered is correctly. Enter the MTU or the largest packet size per frame that your NBG-418N can receive and process. Select Nailed-Up Connection if you do not want the connection to time out. This value specifies the time in minutes that elapses before the router automatically disconnects from the PPPoE server. NBG-418N Users Guide 89 Chapter 7 WAN Table 39 Network > WAN > Internet Connection: PPPoE Encapsulation (continued) LABEL First DNS Server DESCRIPTION If you do not configure a DNS server, you must know the IP address of a computer in order to access it. Second DNS Server Select From ISP if your ISP dynamically assigns DNS server information (and the NBG-

418Ns WAN IP address). The field to the right displays the (read-only) DNS server IP address that the ISP assigns. Select User-Defined if you have the IP address of a DNS server. Enter the primary and secondary DNS server's IP address in the fields to the right. WAN MAC Address The MAC address section allows users to configure the WAN port's MAC address by using the NBG-418Ns MAC address, copying the MAC address from a computer on your LAN or manually entering a MAC address. Factory default Select Factory default to use the factory assigned default MAC Address. Clone the computer's MAC address - MAC Address Select this option to clone the MAC address of the computer (displaying in the screen) from which you are configuring the NBG-418N. Once it is successfully configured, the address will be copied to the rom file. It will not change unless you change the setting or upload a different ROM file. Set WAN MAC Address Apply Reset Select this option and enter the MAC address you want to use. Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. 7.3.3 PPTP Encapsulation Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables secure transfer of data from a remote client to a private server, creating a Virtual Private Network (VPN) using TCP/IP-

based networks. PPTP supports on-demand, multi-protocol and virtual private networking over public networks, such as the Internet. 90 NBG-418N Users Guide This screen displays when you select PPTP encapsulation. Figure 65 Network > WAN > Internet Connection: PPTP Encapsulation Chapter 7 WAN The following table describes the labels in this screen. Table 40 Network > WAN > Internet Connection: PPTP Encapsulation LABEL ISP Parameters for Internet Access DESCRIPTION Connection Type Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables secure transfer of data from a remote client to a private server, creating a Virtual Private Network (VPN) using TCP/IP-based networks. PPTP supports on-demand, multi-

protocol, and virtual private networking over public networks, such as the Internet. The NBG-418N supports only one PPTP server connection at any given time. To configure a PPTP client, you must configure the User Name and Password fields for a PPP connection and the PPTP parameters for a PPTP connection. User Name Password Type the user name given to you by your ISP. Type the password associated with the User Name above. Retype to Confirm Type your password again to make sure that you have entered correctly. MTU Size Enter the MTU or the largest packet size per frame that your NBG-418N can receive and process. NBG-418N Users Guide 91 Chapter 7 WAN Table 40 Network > WAN > Internet Connection: PPTP Encapsulation (continued) LABEL Nailed-up Connection DESCRIPTION Select Nailed-Up Connection if you do not want the connection to time out. Idle Timeout This value specifies the time in minutes that elapses before the NBG-418N automatically disconnects from the PPTP server. PPTP Configuration Server IP Address Type the IP address of the PPTP server. Get automatically from ISP Select this option If your ISP did not assign you a fixed IP address. This is the default selection. Use fixed IP Address Select this option If the ISP assigned a fixed IP address. My WAN IP Address My IP Subnet Mask Enter your WAN IP address in this field if you selected Use Fixed IP Address. Your NBG-418N will automatically calculate the subnet mask based on the IP address that you assign. Unless you are implementing subnetting, use the subnet mask computed by the NBG-418N. My IP Gateway Enter a Gateway IP Address (if your ISP gave you one) in this field. DNS Servers First DNS Server Second DNS Server WAN MAC Address If you do not configure a DNS server, you must know the IP address of a computer in order to access it. Select From ISP if your ISP dynamically assigns DNS server information (and the NBG-418Ns WAN IP address). The field to the right displays the (read-only) DNS server IP address that the ISP assigns. Select User-Defined if you have the IP address of a DNS server. Enter the primary and secondary DNS server's IP address in the fields to the right. The MAC address section allows users to configure the WAN port's MAC address by either using the NBG-418Ns MAC address, copying the MAC address from a computer on your LAN or manually entering a MAC address. Factory default Select Factory default to use the factory assigned default MAC Address. Clone the computer's MAC address - MAC Address Select this option to clone the MAC address of the computer (displaying in the screen) from which you are configuring the NBG-418N. Once it is successfully configured, the address will be copied to the rom file. It will not change unless you change the setting or upload a different ROM file. Set WAN MAC Address Select this option and enter the MAC address you want to use. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. 92 NBG-418N Users Guide CHAPTER 8 LAN 8.1 Overview This chapter describes how to configure LAN settings. A Local Area Network (LAN) is a shared communication system to which many computers are attached. A LAN is a computer network limited to the immediate area, usually the same building or floor of a building. The LAN screens can help you configure a LAN DHCP server, manage IP addresses, and partition your physical network into logical networks. Figure 66 LAN Setup The LAN screens can help you configure a LAN DHCP server and manage IP addresses. 8.2 What You Need To Know The actual physical connection determines whether the NBG-418N ports are LAN or WAN ports. There are two separate IP networks, one inside the LAN network and the other outside the WAN network as shown next. NBG-418N Users Guide 93 Chapter 8 LAN Figure 67 LAN and WAN IP Addresses The LAN parameters of the NBG-418N are preset in the factory with the following values:

IP address of 192.168.1.1 with subnet mask of 255.255.255.0 (24 bits) DHCP server enabled with 32 client IP addresses starting from 192.168.1.33. These parameters should work for the majority of installations. If your ISP gives you explicit DNS server address(es), read the embedded Web Configurator help regarding what fields need to be configured. 8.2.1 IP Pool Setup The NBG-418N is pre-configured with a pool of 32 IP addresses starting from 192.168.1.33 to 192.168.1.64. This configuration leaves 31 IP addresses (excluding the NBG-418N itself) in the lower range (192.168.1.2 to 192.168.1.32) for other server computers, for instance, servers for mail, FTP, TFTP, web, etc., that you may have. Refer to Section 3.4.6 on page 30 for information on IP Address and Subnet Mask. 8.2.2 LAN TCP/IP The NBG-418N has built-in DHCP server capability that assigns IP addresses and DNS servers to systems that support DHCP client capability. Refer to the Section 3.4.7 on page 30 section for information on System DNS Servers. 8.3 LAN IP Screen Use this screen to change your basic LAN settings. Click Network > LAN. 94 NBG-418N Users Guide Figure 68 Network > LAN > IP Chapter 8 LAN The following table describes the labels in this screen. Table 41 Network > LAN > IP LABEL IP Address DESCRIPTION Type the IP address of your NBG-418N in dotted decimal notation 192.168.1.1 (factory default). IP Subnet Mask The subnet mask specifies the network number portion of an IP address. Your NBG-

418N will automatically calculate the subnet mask based on the IP address that you assign. Unless you are implementing subnetting, use the subnet mask computed by the NBG-418N. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. NBG-418N Users Guide 95 Chapter 8 LAN 96 NBG-418N Users Guide CHAPTER 9 DHCP Server 9.1 Overview DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to obtain TCP/IP configuration at start-up from a server. You can configure the NBG-418Ns LAN as a DHCP server or disable it. When configured as a server, the NBG-418N provides the TCP/IP configuration for the clients. If DHCP service is disabled, you must have another DHCP server on your LAN, or else the computer must be manually configured. 9.2 What You Can Do Use the General screen to enable the DHCP server (Section 9.4 on page 97). Use the Advanced screen to assign IP addresses on the LAN to specific individual computers based on their MAC Addresses (Section 9.5 on page 98). Use the Client List screen to view the current DHCP client information (Section 9.6 on page 100). 9.3 What You Need To Know Every Ethernet device has a unique MAC (Media Access Control) address. The MAC address is assigned at the factory and consists of six pairs of hexadecimal characters, for example, 00:A0:C5:00:00:02. Find out the MAC addresses of your network devices if you intend to add them to the DHCP Client List screen. Refer to Section 3.4.6 on page 30 for information on IP Address and Subnet Mask. Refer to the Section 3.4.7 on page 30 section for information on System DNS Servers. 9.4 General Screen Use this screen to enable the DHCP server. Click Network > DHCP Server. The following screen displays. NBG-418N Users Guide 97 Chapter 9 DHCP Server Figure 69 Network > DHCP Server > General The following table describes the labels in this screen. Table 42 Network > DHCP Server > General LABEL Enable DHCP Server DESCRIPTION Enable or Disable DHCP for LAN. DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients (computers) to obtain TCP/IP configuration at startup from a server. Leave the Enable DHCP Server check box selected unless your ISP instructs you to do otherwise. Clear it to disable the NBG-418N acting as a DHCP server. When configured as a server, the NBG-418N provides TCP/IP configuration for the clients. If not, DHCP service is disabled and you must have another DHCP server on your LAN, or else the computers must be manually configured. When set as a server, fill in the following four fields. This field specifies the first of the contiguous addresses in the IP address pool for LAN. This field specifies the size, or count of the IP address pool for LAN. Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. IP Pool Starting Address Pool Size Apply Reset 9.5 Advanced Screen This screen allows you to assign IP addresses on the LAN to specific individual computers based on their MAC addresses. You can also use this screen to configure the DNS server information that the NBG-418N sends to the DHCP clients. To change your NBG-418Ns static DHCP settings, click Network > DHCP Server > Advanced. The following screen displays. 98 NBG-418N Users Guide Figure 70 Network > DHCP Server > Advanced Chapter 9 DHCP Server The following table describes the labels in this screen. Table 43 Network > DHCP Server > Advanced LABEL Static DHCP Table DESCRIPTION

This is the index number of the static IP table entry (row). MAC Address Type the MAC address (with colons) of a computer on your LAN. IP Address DNS Server DNS Servers Assigned by DHCP Server Type the LAN IP address of a computer on your LAN. The NBG-418N passes a DNS (Domain Name System) server IP address (in the order you specify here) to the DHCP clients. If you do not configure the DNS server, the DHCP service is disabled and you must have another DHCP sever on your LAN, or else the computers must have their DNS server addresses manually configured. First DNS Server Second DNS Server Select From ISP if your ISP dynamically assigns DNS server information (and the NBG-

418Ns WAN IP address). The field to the right displays the (read-only) DNS server IP address that the ISP assigns. Select User-Defined if you have the IP address of a DNS server. Enter the DNS server's IP address in the field to the right. If you chose User-Defined, but leave the IP address set to 0.0.0.0, User-Defined changes to None after you click Apply. If you set a second choice to User-Defined, and enter the same IP address, the second User-

Defined changes to None after you click Apply. Select DNS Relay to have the NBG-418N act as a DNS proxy. The NBG-418N's LAN IP address displays in the field to the right (read-only). The NBG-418N tells the DHCP clients on the LAN that the NBG-418N itself is the DNS server. When a computer on the LAN sends a DNS query to the NBG-418N, the NBG-418N forwards the query to the NBG-418N's system DNS server (configured in the WAN > Internet Connection screen) and relays the response back to the computer. You can only select DNS Relay for one of the three servers; if you select DNS Relay for a second or third DNS server, that choice changes to None after you click Apply. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. NBG-418N Users Guide 99 Chapter 9 DHCP Server 9.6 Client List Screen The DHCP table shows current DHCP client information (including IP Address, Host Name and MAC Address) of network clients using the NBG-418Ns DHCP servers. Configure this screen to always assign an IP address to a MAC address (and host name). Click Network > DHCP Server > Client List. Note: You can also view a read-only client list by clicking the DHCP Table (Details...) hyperlink in the Status screen. The following screen displays. Figure 71 Network > DHCP Server > Client List The following table describes the labels in this screen. Table 44 Network > DHCP Server > Client List LABEL

DESCRIPTION This is the index number of the host computer. IP Address Host Name MAC Address Reserve Apply Refresh This field displays the IP address relative to the # field listed above. This field displays the computer host name. The MAC (Media Access Control) or Ethernet address on a LAN (Local Area Network) is unique to your computer (six pairs of hexadecimal notation). A network interface card such as an Ethernet adapter has a hardwired address that is assigned at the factory. This address follows an industry standard that ensures no other adapter has a similar address. Select this check box in the DHCP Setup section to have the NBG-418N always assign the IP address(es) to the MAC address(es) (and host name(s)). After you click Apply, the MAC address and IP address also display in the Advanced screen (where you can edit them). Click Apply to save your settings. Click Refresh to reload the DHCP table. 100 NBG-418N Users Guide CHAPTER 10 Network Address Translation 10.1 Overview This chapter discusses how to configure NAT on the NBG-418N. NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a host in a packet. For example, the source address of an outgoing packet, used within one network is changed to a different IP address known within another network. Each packet has two addresses a source address and a destination address. For outgoing packets, NAT maps private (local) IP addresses to globally unique ones required for communication with hosts on other networks. It replaces the original IP source address in each packet and then forwards it to the Internet. The NBG-418N keeps track of the original addresses and port numbers so incoming reply packets can have their original values restored. The following figure illustrates this. Figure 72 NAT Example A: 192.168.1.33 FTP, Telnet, SNMP Ports 21 to 25 B: 192.168.1.34 Port 80 C: 192.168.1.35 LAN WAN 192.168.1.1 IP address assigned by ISP For more information on IP address translation, refer to RFC 1631, The IP Network Address Translator (NAT). Note: You must create a firewall rule in addition to setting up NAT, to allow traffic from the WAN to be forwarded through the NBG-418N. NBG-418N Users Guide 101 Chapter 10 Network Address Translation 10.2 What You Can Do Use the General screen to enable NAT and set a default server (Section 10.3 on page 103). Use the Application screen to change your NBG-418Ns port forwarding settings (Section 10.4 on page 104). 10.2.1 What You Need To Know The following terms and concepts may help as you read through this chapter. Inside/Outside This denotes where a host is located relative to the NBG-418N, for example, the computers of your subscribers are the inside hosts, while the web servers on the Internet are the outside hosts. Global/Local This denotes the IP address of a host in a packet as the packet traverses a router, for example, the local address refers to the IP address of a host when the packet is in the local network, while the global address refers to the IP address of the host when the same packet is traveling in the WAN side. Note: Inside/outside refers to the location of a host, while global/local refers to the IP address of a host used in a packet. An inside local address (ILA) is the IP address of an inside host in a packet when the packet is still in the local network, while an inside global address (IGA) is the IP address of the same inside host when the packet is on the WAN side. The following table summarizes this information. Table 45 NAT Definitions ITEM Inside DESCRIPTION This refers to the host on the LAN. Outside This refers to the host on the WAN. Local Global This refers to the packet address (source or destination) as the packet travels on the LAN. This refers to the packet address (source or destination) as the packet travels on the WAN. Note: NAT never changes the IP address (either local or global) of an outside host. What NAT Does In the simplest form, NAT changes the source IP address in a packet received from a subscriber

(the inside local address) to another (the inside global address) before forwarding the packet to the WAN side. When the response comes back, NAT translates the destination address (the inside global address) back to the inside local address before forwarding it to the original inside host. Note that the IP address (either local or global) of an outside host is never changed. 102 NBG-418N Users Guide Chapter 10 Network Address Translation The global IP addresses for the inside hosts can be either static or dynamically assigned by the ISP. In addition, you can designate servers, for example, a web server and a telnet server, on your local network and make them accessible to the outside world. If you do not define any servers , NAT offers the additional benefit of firewall protection. With no servers defined, your NBG-418N filters out all incoming inquiries, thus preventing intruders from probing your network. For more information on IP address translation, refer to RFC 1631, The IP Network Address Translator (NAT). How NAT Works Each packet has two addresses a source address and a destination address. For outgoing packets, the ILA (Inside Local Address) is the source address on the LAN, and the IGA (Inside Global Address) is the source address on the WAN. For incoming packets, the ILA is the destination address on the LAN, and the IGA is the destination address on the WAN. NAT maps private (local) IP addresses to globally unique ones required for communication with hosts on other networks. It replaces the original IP source address in each packet and then forwards it to the Internet. The NBG-418N keeps track of the original addresses and port numbers so incoming reply packets can have their original values restored. The following figure illustrates this. Figure 73 How NAT Works 10.3 General NAT Screen Use this screen to enable NAT and set a default server. Click Network > NAT to open the General screen. Figure 74 Network > NAT > General NBG-418N Users Guide 103 Chapter 10 Network Address Translation The following table describes the labels in this screen. Table 46 Network > NAT > General LABEL NAT Setup DESCRIPTION Enable Network Address Translation Network Address Translation (NAT) allows the translation of an Internet protocol address used within one network (for example a private IP address used in a local network) to a different IP address known within another network (for example a public IP address used on the Internet). Select the check box to enable NAT. Default Server Setup Server IP Address In addition to the servers for specified services, NAT supports a default server. A default server receives packets from ports that are not specified in the Application screen. If you do not assign a Default Server IP address, the NBG-418N discards all packets received for ports that are not specified in the Application screen or remote management. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. 10.4 NAT Application Screen Use the Application screen to forward incoming service requests to the server(s) on your local network. You may enter a single port number or a range of port numbers to be forwarded, and the local IP address of the desired server. The port number identifies a service; for example, web service is on port 80 and FTP on port 21. In some cases, such as for unknown services or where one server can support more than one service (for example both FTP and web service), it might be better to specify a range of port numbers. In addition to the servers for specified services, NAT supports a default server. A service request that does not have a server explicitly designated for it is forwarded to the default server. If the default is not defined, the service request is simply discarded. Note: Many residential broadband ISP accounts do not allow you to run any server processes (such as a Web or FTP server) from your location. Your ISP may periodically check for servers and may suspend your account if it discovers any active services at your location. If you are unsure, refer to your ISP. Port forwarding allows you to define the local servers to which the incoming services will be forwarded. To change your NBG-418Ns port forwarding settings, click Network > NAT >

Application. The screen appears as shown. Note: If you do not assign a Default Server IP address in the NAT > General screen, the NBG-418N discards all packets received for ports that are not specified in this screen or remote management. Refer to Appendix E on page 209 for port numbers commonly used for particular services. 104 NBG-418N Users Guide Figure 75 Network > NAT > Application Chapter 10 Network Address Translation The following table describes the labels in this screen. Table 47 Network > NAT > Application LABEL Add Application Rule DESCRIPTION Active Select the check box to enable this rule and the requested service can be forwarded to the host with a specified internal IP address. Service Name Clear the checkbox to disallow forwarding of these ports to an inside server without having to delete the entry. Type a name (of up to 31 printable characters) to identify this rule in the first field next to Service Name. Otherwise, select a predefined service in the second field next to Service Name. The predefined service name and port number(s) will display in the Service Name and Port fields. Local Port Range Type a port number(s) to be forwarded. Public Port Range To specify a range of ports, enter a hyphen (-) between the first port and the last port, such as 10-20. To specify two or more non-consecutive port numbers, separate them by a comma without spaces, such as 123,567. Protocol Select the transport layer protocol supported by this server. Choices are TCP, UDP, or TCP&UDP. NBG-418N Users Guide 105 Chapter 10 Network Address Translation Table 47 Network > NAT > Application (continued) LABEL Server IP Address Type the inside IP address of the server that receives packets from the port(s) specified in DESCRIPTION the Port field. Apply Reset Click Apply to save your changes to the Application Rules Summary table. Click Reset to not save and return your new changes in the Service Name and Port fields to the previous one. Application Rules Summary This is the number of an individual port forwarding server entry. This icon is turned on when the rule is enabled. This field displays a name to identify this rule. This field displays the port number(s).

Active Name Local Start/End Port Public Start/End Port Protocol This is the transport layer protocol used for the service. Server IP Address This field displays the inside IP address of the server. Modify Click the Edit icon to display and modify an existing rule setting in the fields under Add Application Rule. Click the Remove icon to delete a rule. 10.5 Technical Reference The following section contains additional technical information about the NBG-418N features described in this chapter. 10.5.1 NAT Port Forwarding: Services and Port Numbers A port forwarding set is a list of inside (behind NAT on the LAN) servers, for example, web or FTP, that you can make accessible to the outside world even though NAT makes your whole inside network appear as a single machine to the outside world. Use the Application screen to forward incoming service requests to the server(s) on your local network. You may enter a single port number or a range of port numbers to be forwarded, and the local IP address of the desired server. The port number identifies a service; for example, web service is on port 80 and FTP on port 21. In some cases, such as for unknown services or where one server can support more than one service (for example both FTP and web service), it might be better to specify a range of port numbers. In addition to the servers for specified services, NAT supports a default server. A service request that does not have a server explicitly designated for it is forwarded to the default server. If the default is not defined, the service request is simply discarded. Note: Many residential broadband ISP accounts do not allow you to run any server processes (such as a Web or FTP server) from your location. Your ISP may periodically check for servers and may suspend your account if it discovers any active services at your location. If you are unsure, refer to your ISP. 106 NBG-418N Users Guide Chapter 10 Network Address Translation 10.5.2 NAT Port Forwarding Example Let's say you want to assign ports 21-25 to one FTP, Telnet and SMTP server (A in the example), port 80 to another (B in the example) and assign a default server IP address of 192.168.1.35 to a third (C in the example). You assign the LAN IP addresses and the ISP assigns the WAN IP address. The NAT network appears as a single host on the Internet. Figure 76 Multiple Servers Behind NAT Example NBG-418N Users Guide 107 Chapter 10 Network Address Translation 108 NBG-418N Users Guide CHAPTER 11 Dynamic DNS 11.1 Overview Dynamic Domain Name Service (DDNS) services let you use a fixed domain name with a dynamic IP address. Users can always use the same domain name instead of a different dynamic IP address that changes each time to connect to the NBG-418N or a server in your network. Note: The NBG-418N must have a public global IP address and you should have your registered DDNS account information on hand. 11.2 Dynamic DNS Screen To configure your NBG-418Ns DDNS, click Network > DDNS. Figure 77 Network > DDNS The following table describes the labels in this screen. Table 48 Network > DDNS LABEL Enable Dynamic DNS DESCRIPTION Select this check box to use DDNS. Service Provider Dynamic DNS Type Select the name of your DDNS service provider. This field is only available if you use the DynDNS service provider. Select the type of service that you are registered for from your Dynamic DNS service provider. NBG-418N Users Guide 109 Chapter 11 Dynamic DNS Table 48 Network > DDNS LABEL Host Name DESCRIPTION The host name is the domain name that the DDNS service will map to your dynamic global IP address. Type the host name fully qualified, for example, yourhost.mydomain.net. You can specify up to two host names in the field separated by a comma (","). User Name Type the user name that you used when you registered with the DDNS service. Password Timeout Enable Wildcard Option Type the password associated with the DDNS user name. This is the length of time in hours between updates to the DDNS service. If the update fails, the NBG-418N will disable DDNS. Select this if your DDNS service provider supports use of a wildcard (*) that will allow

*.yourhost.dyndns.org (where * may be the name of a web, mail, FTP etc. server in your network) to be mapped to the same IP address as yourhost.dyndns.org. This feature is useful when there are multiple servers in your network and you want users to be able to use different domain names to reach them. Apply Reset Click Apply to save your changes back to the NBG-418N. Click Reset to begin configuring this screen afresh. 110 NBG-418N Users Guide CHAPTER 12 Firewall 12.1 Overview Use these screens to enable and configure the firewall that protects your NBG-418N and your LAN from unwanted or malicious traffic. Enable the firewall to protect your LAN computers from attacks by hackers on the Internet and control access between the LAN and WAN. By default the firewall:

allows traffic that originates from your LAN computers to go to all of the networks. blocks traffic that originates on the other networks from going to the LAN. The following figure illustrates the default firewall action. User A can initiate an IM (Instant Messaging) session from the LAN to the WAN (1). Return traffic for this session is also allowed (2). However other traffic initiated from the WAN is blocked (3 and 4). Figure 78 Default Firewall Action 12.2 What You Can Do Use the General screen to enable or disable the NBG-418Ns firewall (Section 12.4 on page 112). Use the Services screen to enable or disable ICMP and VPN passthrough features (Section 12.5 on page 113). NBG-418N Users Guide 111 Chapter 12 Firewall 12.3 What You Need To Know The NBG-418Ns firewall feature physically separates the LAN and the WAN and acts as a secure gateway for all data passing between the networks. 12.3.1 About the NBG-418N Firewall The NBG-418N firewall is a stateful inspection firewall and is designed to protect against Denial of Service attacks when activated (click the General tab under Firewall and then click the Enable Firewall check box). The NBG-418N's purpose is to allow a private Local Area Network (LAN) to be securely connected to the Internet. The NBG-418N can be used to prevent theft, destruction and modification of data, as well as log events, which may be important to the security of your network. The NBG-418N is installed between the LAN and a broadband modem connecting to the Internet. This allows it to act as a secure gateway for all data passing between the Internet and the LAN. The NBG-418N has one Ethernet WAN port and four Ethernet LAN ports, which are used to physically separate the network into two areas.The WAN (Wide Area Network) port attaches to the broadband (cable or DSL) modem to the Internet. The LAN (Local Area Network) port attaches to a network of computers, which needs security from the outside world. These computers will have access to Internet services such as e-mail, FTP and the World Wide Web. However, "inbound access" is not allowed (by default) unless the remote host is authorized to use a specific service. 12.3.2 VPN Pass Through Features A Virtual Private Network (VPN) is a way to securely connect two networks over the Internet. For example a home network and one in a business office. This requires special equipment on both ends of the connection. The NBG-418N is not one of the endpoints but it does allow traffic from those endpoints to pass through. The NBG-418N allows the following types of VPN traffic to pass through:

IP security (IPSec) Point-to-Point Tunneling Protocol (PPTP) 12.4 General Firewall Screen Use this screen to enable or disable the NBG-418Ns firewall, and set up firewall logs. Click Security > Firewall to open the General screen. 112 NBG-418N Users Guide Figure 79 Security > Firewall > General Chapter 12 Firewall The following table describes the labels in this screen. Table 49 Security > Firewall > General LABEL Enable Firewall DESCRIPTION Select this check box to activate the firewall. The NBG-418N performs access control and protects against Denial of Service (DoS) attacks when the firewall is activated. Apply Reset Click Apply to save the settings. Click Reset to start configuring this screen again. 12.5 Services Screen Use the Services screen to enable or disable ICMP and VPN passthrough features. Click Security > Firewall > Services. The screen appears as shown next. Figure 80 Security > Firewall > Services The following table describes the labels in this screen. Table 50 Security > Firewall > Services LABEL ICMP DESCRIPTION Internet Control Message Protocol is a message control and error-reporting protocol between a host server and a gateway to the Internet. ICMP uses Internet Protocol (IP) datagrams, but the messages are processed by the TCP/IP software and directly apparent to the application user. Respond to Ping on WAN The NBG-418N will not respond to any incoming Ping requests when Disable is selected. Select Enable to reply to incoming WAN Ping requests. NBG-418N Users Guide 113 Chapter 12 Firewall Table 50 Security > Firewall > Services (continued) LABEL VPN Passthrough DESCRIPTION Select the checkbox to enable the advanced pass through features:

PPTP Passthrough: Select this option to allow the NBG-418N to pass through VPN traffic using PPTP. L2TP Passthrough: Select this option to enable computers on your LAN to make L2TP VPN connections to servers on the Internet. IPSEC Passthrough: Select this option to allow the NBG-418N to pass through VPN traffic using the IPsec protocol. Apply Reset Click Apply to save the settings. Click Reset to start configuring this screen again. 114 NBG-418N Users Guide