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Users Guide EMG2881-T20A Dual-Band Wireless AC1300 Gigabit Ethernet Gateway Default Login Details LAN IP Address User Name Password http://192.168.1.1 admin See the device label Version 1.00 Edition 1, 01/2018 Copyright 2018 Zyxel Communications Corporation IMPORTANT!
READ CAREFULLY BEFORE USE. KEEP THIS GUIDE FOR FUTURE REFERENCE. Screenshots and graphics in this book may differ slightly from your product due to differences in your product firmware or your computer operating system. 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 EMG2881-T20A and access the Web Configurator. More Information Go to support.zyxel.com to find other information on the EMG2881-T20A. EMG2881-T20A Users Guide 2 Document Conventions Warnings and Notes These are how warnings and notes are shown in this guide. Warnings tell you about things that could harm you or your device. Note: Notes tell you other important information (for example, other things you may need to configure or helpful tips) or recommendations. Syntax Conventions The EMG2881-T20A may be referred to as the EMG2881-T20A in this guide. Product labels, screen names, field labels and field choices are all in bold font. A right angle bracket ( > ) within a screen name denotes a mouse click. For example, Configuration >
Log / Report > Log Settings means you first click Maintenance in the navigation panel, then the Log sub menu and finally the Log Setting tab to get to that screen. Icons Used in Figures Figures in this user guide may use the following generic icons. The EMG2881-T20A icon is not an exact representation of your device. EMG2881-T20A Generic Router Wireless Router / Access Point Switch Firewall Modem Server Cell Tower Printer EMG2881-T20A Users Guide 3 Contents Overview Contents Overview Users Guide ........................................................................................................................................9 Introduction ........................................................................................................................................... 10 Introducing the Web Configurator ..................................................................................................... 16 Router Mode ......................................................................................................................................... 18 Tutorials .................................................................................................................................................. 24 Technical Reference ........................................................................................................................34 Monitor ................................................................................................................................................... 35 WAN ....................................................................................................................................................... 37 Wireless LAN .......................................................................................................................................... 53 LAN ......................................................................................................................................................... 70 Applications .......................................................................................................................................... 75 Security .................................................................................................................................................. 92 Maintenance ........................................................................................................................................ 98 Troubleshooting .................................................................................................................................. 106 EMG2881-T20A Users Guide 4 Table of Contents Table of Contents Document Conventions ......................................................................................................................3 Contents Overview .............................................................................................................................4 Table of Contents.................................................................................................................................5 Part I: Users Guide............................................................................................ 9 Chapter 1 Introduction ........................................................................................................................................10 1.1 Overview ......................................................................................................................................... 10 1.1.1 Ethernet WAN ........................................................................................................................ 10 1.1.2 Wireless Access ...................................................................................................................... 10 1.2 Applications .................................................................................................................................... 11 1.3 Ways to Manage the EMG2881-T20A .......................................................................................... 11 1.4 Good Habits for Managing the EMG2881-T20A .......................................................................... 11 1.5 Hardware ......................................................................................................................................... 12 1.5.1 Front Panel ............................................................................................................................. 12 1.5.2 Front Panel LEDs (Lights) ....................................................................................................... 12 1.5.3 Rear Panel .............................................................................................................................. 13 1.5.4 Rear Panel LEDs (Lights) ........................................................................................................ 14 1.5.5 Using the WLAN and WPS Buttons ....................................................................................... 14 1.5.6 Resetting the EMG2881-T20A ............................................................................................... 14 Chapter 2 Introducing the Web Configurator ...................................................................................................16 2.1 Overview ......................................................................................................................................... 16 2.2 Accessing the Web Configurator ................................................................................................. 16 2.2.1 Login Screen .......................................................................................................................... 16 Chapter 3 Router Mode.......................................................................................................................................18 3.1 Overview ......................................................................................................................................... 18 3.2 Router Mode Status Screen ........................................................................................................... 18 3.2.1 Navigation Panel .................................................................................................................. 21 Chapter 4 Tutorials ...............................................................................................................................................24 EMG2881-T20A Users Guide 5 Table of Contents 4.1 Overview ......................................................................................................................................... 24 4.2 Set Up a Wireless Network Using WPS ........................................................................................... 24 4.2.1 Push Button Configuration (PBC) ........................................................................................ 24 4.2.2 PIN Configuration .................................................................................................................. 25 4.3 Connect to the EMG2881-T20As WiFi Network Manually (No WPS) ........................................ 26 4.3.1 Configuring Wireless Security on the EMG2881-T20A ........................................................ 27 4.3.2 Configure Your Notebook .................................................................................................... 28 4.4 Using Multiple SSIDs on the EMG2881-T20A .................................................................................. 30 4.4.1 Configuring Security Settings of Multiple SSIDs .................................................................. 31 Part II: Technical Reference........................................................................... 34 Chapter 5 Monitor................................................................................................................................................35 5.1 Overview ......................................................................................................................................... 35 5.2 What You Can Do .......................................................................................................................... 35 5.3 Client Tables ................................................................................................................................. 35 Chapter 6 WAN ....................................................................................................................................................37 6.1 Overview ......................................................................................................................................... 37 6.2 What You Can Do .......................................................................................................................... 37 6.3 What You Need To Know .............................................................................................................. 37 6.3.1 Configuring Your Internet Connection ............................................................................... 38 6.4 Management WAN ........................................................................................................................ 39 6.4.1 Edit WAN Connection .......................................................................................................... 40 6.5 NAT ................................................................................................................................................... 47 6.5.1 General Screen ..................................................................................................................... 47 6.5.2 Port Trigger Screen ................................................................................................................ 49 6.5.3 Passthrough Screen .............................................................................................................. 49 6.6 Dynamic DNS Screen ..................................................................................................................... 50 6.7 Interface Group Screen ................................................................................................................. 51 6.7.1 Add Interface Group ............................................................................................................ 51 Chapter 7 Wireless LAN .......................................................................................................................................53 7.1 Overview ......................................................................................................................................... 53 7.1.1 What You Can Do ................................................................................................................. 54 7.1.2 What You Should Know ........................................................................................................ 54 7.2 Wireless LAN Screen ...................................................................................................................... 57 7.3 Wireless Security .............................................................................................................................. 59 EMG2881-T20A Users Guide 6 Table of Contents 7.3.1 No Security ............................................................................................................................. 60 7.3.2 WPA2-PSK ............................................................................................................................... 60 7.4 More AP Screen .............................................................................................................................. 61 7.4.1 More AP Edit .......................................................................................................................... 62 7.5 MAC Filter Screen .......................................................................................................................... 64 7.6 Advanced Screen .......................................................................................................................... 65 7.7 WPS Screen ..................................................................................................................................... 66 7.8 Scheduling Screen ......................................................................................................................... 68 Chapter 8 LAN ......................................................................................................................................................70 8.1 Overview ......................................................................................................................................... 70 8.2 What You Can Do .......................................................................................................................... 70 8.3 What You Need To Know .............................................................................................................. 70 8.4 LAN IP Screen .................................................................................................................................. 71 8.5 Static DHCP Screen ........................................................................................................................ 72 8.6 IPv6 LAN Screen .............................................................................................................................. 73 Chapter 9 Applications .......................................................................................................................................75 9.1 Overview ........................................................................................................................................ 75 9.1.1 What You Can Do in this Chapter ....................................................................................... 75 9.2 What You Need to Know ............................................................................................................... 76 9.3 The QoS General Screen .............................................................................................................. 78 9.4 The Queue Setup Screen ............................................................................................................... 79 9.4.1 Add/Edit a Queue .............................................................................................................. 79 9.5 The Class Setup Screen .................................................................................................................. 80 9.5.1 Add/Edit a Classifier ............................................................................................................. 81 9.6 UPnP Screen .................................................................................................................................... 83 9.7 Technical Reference ...................................................................................................................... 83 9.7.1 Using UPnP in Windows XP Example .................................................................................... 87 9.7.2 Web Configurator Easy Access ........................................................................................... 89 Chapter 10 Security ...............................................................................................................................................92 10.1 Overview ..................................................................................................................................... 92 10.1.1 What You Can Do ............................................................................................................... 92 10.1.2 What You Need To Know ................................................................................................... 92 10.2 IPv4 Firewall Screen ..................................................................................................................... 93 10.3 IPv6 Firewall Screen ...................................................................................................................... 95 Chapter 11 Maintenance......................................................................................................................................98 EMG2881-T20A Users Guide 7 Table of Contents 11.1 Overview ....................................................................................................................................... 98 11.2 What You Can Do ........................................................................................................................ 98 11.3 General Screen ............................................................................................................................ 98 11.4 Password Screen ........................................................................................................................... 99 11.5 Time Screen ................................................................................................................................. 100 11.6 Firmware Upgrade Screen ........................................................................................................ 101 11.7 Configuration Backup/Restore Screen .................................................................................... 102 11.8 Restart Screen ............................................................................................................................. 104 11.9 Log Screen .................................................................................................................................. 104 11.10 The ROMD Screen .................................................................................................................... 104 Chapter 12 Troubleshooting................................................................................................................................106 12.1 Overview ..................................................................................................................................... 106 12.2 Power, Hardware Connections, and LEDs ............................................................................... 106 12.3 EMG2881-T20A Access and Login ............................................................................................ 107 12.4 Internet Access ........................................................................................................................... 108 12.5 Resetting the EMG2881-T20A to Its Factory Defaults .............................................................. 109 12.6 Wireless Connections ................................................................................................................. 110 Appendix A Pop-up Windows, JavaScript and Java Permissions ............................................. 112 Appendix B Setting Up Your Computers IP Address................................................................... 121 Appendix C Common Services ..................................................................................................... 148 Appendix D Customer Support ..................................................................................................... 151 Appendix E Legal Information ....................................................................................................... 157 Index .................................................................................................................................................164 EMG2881-T20A Users Guide 8 PART I Users Guide 9 CHAPTER 1 Introduction 1.1 Overview This chapter introduces the main features and applications of the EMG2881-T20A. The EMG2881-T20A extends the range of your existing wired network without additional wiring, providing easy network access to mobile users. You can set up a wireless network with other IEEE 802.11a/ac/b/g/
n compatible devices. A firewall is also available for secure Internet computing. 1.1.1 Ethernet WAN If you have another broadband modem or router (such as ADSL) available, you can use the Ethernet WAN port and then connect it to the broadband modem or router. This way, you can access the Internet via an Ethernet connection and still use the QoS, Firewall and parental control functions on the EMG2881-T20A. Figure 1 EMG2881-T20As Internet Access Application: Ethernet WAN 1.1.2 Wireless Access The EMG2881-T20A is a wireless Access Point (AP) for IEEE 802.11b/g/n/a/ac wireless clients, such as notebook computers, iPads, smartphones, etc. These devices can connect to the EMG2881-T20A to access network resources and the Internet. Your EMG2881-T20A supports Wi-Fi Protected Setup (WPS), which allows you to quickly set up a wireless network with strong security. You can configure your wireless network using the built-in Web Configurator. See Chapter 4 on page 24 for more information about how to set up a wireless network. EMG2881-T20A Users Guide 10 Chapter 1 Introduction Figure 2 Wireless Access Example 1.2 Applications You can have the following networks with the EMG2881-T20A:
Wired. You can connect network devices via the Ethernet ports of the EMG2881-T20A so that they can communicate with each other and access the Internet. Wireless. Wireless clients can connect to the EMG2881-T20A to access network resources. You can use WPS (Wi-Fi Protected Setup) to create an instant network connection with another WPS-compatible device. WAN. Connect to a broadband modem/router for Internet access. 1.3 Ways to Manage the EMG2881-T20A Use any of the following methods to manage the EMG2881-T20A. WPS (Wi-Fi Protected Setup). You can use the WPS button or the WPS section of the Web Configurator to set up a wireless network with your EMG2881-T20A. Web Configurator. This is recommended for everyday management of the EMG2881-T20A using a
(supported) web browser. 1.4 Good Habits for Managing the EMG2881-T20A Do the following things regularly to make the EMG2881-T20A more secure and to manage the EMG2881-
T20A 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 EMG2881-T20A to its factory default settings. If you backed up an earlier configuration file, you would not have to totally re-configure the EMG2881-T20A. You could simply restore your last configuration. EMG2881-T20A Users Guide 11 Chapter 1 Introduction 1.5 Hardware 1.5.1 Front Panel The following graphic displays the front panel of the EMG2881-T20A. Figure 3 LEDs on the EMG2881-T20A 1.5.2 Front Panel LEDs (Lights) The following table describes the front panel LEDs. Table 1 Front panel LEDs LED Power COLOR White STATUS On Off DESCRIPTION The EMG2881-T20A is receiving power and functioning properly. The EMG2881-T20A is not receiving power. Internet White On The EMG2881-T20A has an IP connection but no traffic. Your device has a WAN IP address (either static or assigned by a DHCP server), PPP negotiation was successfully completed (if used) and the connection is up. The EMG2881-T20A is sending or receiving IP traffic. The EMG2881-T20A does not have an IP connection. The 2.4 GHz/5 GHz wireless network is activated. The EMG2881-T20A is communicating with 2.4 GHz/5 GHz wireless clients. The EMG2881-T20A is setting up a WPS connection with a 2.4 GHz/5 GHz wireless client. The wireless LAN is not ready or has failed. Blinking Off On Blinking Blinking Off WLAN 2.4/5G White Amber EMG2881-T20A Users Guide 12 Chapter 1 Introduction 1.5.3 Rear Panel The following graphic displays the rear panel of the EMG2881-T20A. Figure 4 EMG2881-T20A Rear Panel The following table describes the items on the rear panel. Table 2 Rear Panel Ports LABEL WPS DESCRIPTION Press the WPS button for more than one second to quickly set up a secure wireless connection between the EMG2881-T20A and a WPS-compatible client. Press the button to return the EMG2881-T20A to the factory defaults. Reset LAN1 ~ LAN4 Connect computers or other Ethernet devices to Ethernet ports for Internet WAN Power Power Button access. Connect an Ethernet cable to the Ethernet WAN port for Internet access. Connect the power cable and press the power button to start the EMG2881-T20A. Press the power button after the power cable is connected to start the EMG2881-T20A. EMG2881-T20A Users Guide 13 Chapter 1 Introduction 1.5.4 Rear Panel LEDs (Lights) The following table describes the rear panel LEDs. Table 3 Rear panel LEDs LED LAN 1-4 COLOR Green WAN Green STATUS On Blinking Off On Blinking Off DESCRIPTION The EMG2881-T20A recognizes an Ethernet cable through the LAN port. The EMG2881-T20A is sending/receiving data through the LAN. The EMG2881-T20A does not detect an Ethernet cable through the LAN port. The EMG2881-T20A recognizes an Ethernet cable through the WAN port. The EMG2881-T20A is sending/receiving data through the WAN. The EMG2881-T20A does not detect an Ethernet cable through the WAN port. 1.5.5 Using the WLAN and WPS Buttons If the wireless network is turned off, go to the Wireless screen to turn it on. Once the 2.4G WLAN/WPS or 5G WLAN/WPS LED turns white, the wireless network is active. You can also use the WPS button to quickly set up a secure wireless connection between the EMG2881-
T20A and a WPS-compatible client by adding one device at a time. To activate WPS:
1 Make sure the POWER LED is on and not blinking. 2 3 Press the WPS button for more than one second and release it. Press the WPS button on another WPS-enabled device within range of the EMG2881-T20A. The WLAN 2.4G and WLAN 5G LEDs flash amber while the EMG2881-T20A sets up a WPS connection with the other wireless device. 4 Once the connection is successfully made, the WLAN 2.4G and WLAN 5G LEDs shine white. 1.5.6 Resetting the EMG2881-T20A 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 EMG2881-T20A to reload the factory-default configuration file. This means that you will lose all configurations that you had previously saved, the user name will be reset to admin, the password will be reset to the factory default (see the device label), and the IP address will be reset to 192.168.1.1 (router mode). 1.5.6.1 How to Use the RESET Button 1 Make sure the POWER LED is on. 2 Press the RESET button for one to four seconds to restart/reboot the EMG2881-T20A. EMG2881-T20A Users Guide 14 Chapter 1 Introduction 3 Press the RESET button for longer than five seconds to set the EMG2881-T20A back to its factory-default configurations. EMG2881-T20A Users Guide 15 CHAPTER 2 Introducing the Web Configurator 2.1 Overview This chapter describes how to access the EMG2881-T20A 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 EMG2881-T20A via Internet browser. Use Internet Explorer 9.0 and later versions, Mozilla Firefox 21 and later versions, Safari 6.0 and later versions or Google Chrome 26.0 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 the Troubleshooting chapter (Chapter 12 on page 106) to see how to make sure these functions are allowed in Internet Explorer. 2.2 Accessing the Web Configurator 1 Make sure your EMG2881-T20A hardware is properly connected and prepare your computer or computer network to connect to the EMG2881-T20A (refer to the Quick Start Guide). 2 3 Launch your web browser. The EMG2881-T20A is in router mode by default. Type "http://192.168.1.1" as the website address. Your computer must be in the same subnet in order to access this website address. 2.2.1 Login Screen The Web Configurator initially displays the following login screen. Type the default Username admin and randomly assigned default password (see the device label) in the Login screen and click Login. EMG2881-T20A Users Guide 16 Chapter 2 Introducing the Web Configurator Figure 5 Login screen The following table describes the labels in this screen. Table 4 Login screen LABEL Username Password DESCRIPTION Type "admin" (default) as the user name. Type the default password (on the device label). Click Login. EMG2881-T20A Users Guide 17 CHAPTER 3 Router Mode 3.1 Overview The EMG2881-T20A is set to router mode by default. Routers are used to connect the local network to another network (for example, the Internet). In the figure below, the EMG2881-T20A connects the local network (LAN1 ~ LAN4) to the Internet. Figure 6 EMG2881-T20A Network Modem 3.2 Router Mode Status Screen Click to open the status screen. EMG2881-T20A Users Guide 18 Figure 7 Status Screen: Router Mode The following table describes the icons shown in the Status screen. Table 5 Status Screen Icon Key ICON Logout DESCRIPTION Click this at any time to exit the Web Configurator. Click this icon to see the Status page. The information in this screen depends on the device mode you select. Click this icon to see the Monitor navigation menu. Click this icon to see the Configuration navigation menu. Click this icon to see the Maintenance navigation menu. The following table describes the labels shown in the Status screen. Table 6 Status Screen: Router Mode LABEL Device Information Host Name DESCRIPTION Model Number Firmware Version Sys OP Mode This is the System Name you enter in the Maintenance > General screen. It is for identification purposes. This is the model name of your device. This is the firmware version and the date created. This is the device mode to which the EMG2881-T20A is set - Router Mode. EMG2881-T20A Users Guide 19 Chapter 3 Router Mode Table 6 Status Screen: Router Mode (continued) LABEL WAN/WAN 1/WAN 2 Information DESCRIPTION MAC Address IP Address IP Subnet Mask Default Gateway IPv6 Address LAN Information MAC Address IP Address IP Subnet Mask DHCP IPv6 Address WLAN 2.4G Information WLAN OP Mode MAC Address SSID Channel Security WLAN 5G Information WLAN OP Mode MAC Address SSID Channel Security Firewall System Status Item Data System Up Time Current Date/Time System Resource
- CPU Usage
- Memory Usage Interface Status Interface This shows the WAN Ethernet adapter MAC Address of your device. This shows the WAN ports IP address. This shows the WAN ports subnet mask. This shows the WAN ports gateway IP address. This shows the IPv6 address of the EMG2881-T20A on the WAN. This shows the LAN Ethernet adapter MAC Address of your device. This shows the LAN ports IP address. This shows the LAN ports subnet mask. This shows the LAN ports DHCP role - Server or Disable. This shows the IPv6 address of the EMG2881-T20A on the LAN. This is the device mode to which the EMG2881-T20As wireless LAN is set - Access Point Mode. This shows the 2.4GHz wireless adapter MAC Address of your device. This shows a descriptive name used to identify the EMG2881-T20A in the 2.4GHz wireless LAN. This shows the channel number which you select manually. This shows the level of wireless security the EMG2881-T20A is using. This is the device mode to which the EMG2881-T20As wireless LAN is set - Access Point Mode. This shows the 5GHz wireless adapter MAC Address of your device. This shows a descriptive name used to identify the EMG2881-T20A in the 5GHz wireless LAN. This shows the channel number which you select manually. This shows the level of wireless security the EMG2881-T20A is using. This shows whether the firewall is enabled or not. This column shows the type of data the EMG2881-T20A is recording. This column shows the actual data recorded by the EMG2881-T20A. This is the total time the EMG2881-T20A has been on. This field displays your EMG2881-T20As present date and time. This displays what percentage of the EMG2881-T20As processing ability is currently used. When this percentage is close to 100%, the EMG2881-T20A 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 (for example, using bandwidth management.) This shows what percentage of the heap memory the EMG2881-T20A is using. This displays the EMG2881-T20A port types. The port types are: WAN, LAN and WLAN. EMG2881-T20A Users Guide 20 Chapter 3 Router Mode Table 6 Status Screen: Router Mode (continued) LABEL Status Rate DESCRIPTION For the LAN and WAN ports, this field displays Down (line is down) or Up (line is up or connected). For the 2.4GHz/5GHz WLAN, it displays Up when the 2.4GHz/5GHz WLAN is enabled or Down when the 2.4G/5G WLAN is disabled. For the LAN ports, this displays the port speed or N/A when the line is disconnected. For the WAN port, it displays the port speed and duplex setting if youre using Ethernet encapsulation. This field displays N/A when the line is disconnected. For the 2.4GHz/5GHz WLAN, it displays the maximum transmission rate when the 2.4GHz/5GHz WLAN is enabled and N/A when the WLAN is disabled. 3.2.1 Navigation Panel Use the sub-menus on the navigation panel to configure EMG2881-T20A features. Figure 8 Navigation Panel: Router Mode The following table describes the sub-menus. Table 7 Navigation Panel: Router Mode LINK Status TAB FUNCTION This screen shows the EMG2881-T20As general device, system and interface status information. Use this screen to access the wizard, and summary statistics tables. MONITOR Client Tables Use this screen to view current DHCP client information. EMG2881-T20A Users Guide 21 Chapter 3 Router Mode TAB Table 7 Navigation Panel: Router Mode (continued) LINK CONFIGURATION WAN Management WAN FUNCTION NAT Management WAN General Port Trigger Passthrough This screen allows you to configure ISP parameters, WAN IP address assignment, DNS servers, the WAN MAC address, and VLAN settings. Use this screen to enable NAT. Use this screen to change your EMG2881-T20As port triggering settings. Use this screen to enable or disable the VPN passthrough feature. Use this screen to set up dynamic DNS. Use this screen to add a LAN interface or a VLAN ID to a new group. Dynamic DNS Dynamic DNS Interface Group Interface Group Wireless Wireless LAN Application Bandwidth MGMT UPnP Security IPv4 Firewall IPv6 firewall MAINTENANCE Wireless More AP MAC Filter Advanced WPS Scheduling LAN IP Static DHCP IPv6 LAN Use this screen to enable the wireless LAN and configure wireless LAN and wireless security settings. Use this screen to configure multiple BSSs on the EMG2881-T20A. Use the MAC filter screen to configure the EMG2881-T20A to block access to devices or block the devices from accessing the EMG2881-T20A. This screen allows you to configure advanced wireless settings. Use this screen to configure WPS. Use this screen to schedule the times the Wireless LAN is enabled. Use this screen to configure LAN IP address and subnet mask. Use this screen to enable the EMG2881-T20As DHCP server. This screen allows you to assign IP addresses on the LAN to specific individual computers based on their MAC addresses. Use this screen to configure the IPv6 address for the EMG2881-T20A on the LAN. QoS General Queue Setup Class Setup UPnP Use this screen to enable or disable QoS and set the upstream bandwidth. Use this screen to configure QoS queue assignment. Use this screen to configure QoS classifiers. Use this screen to enable UPnP on the EMG2881-T20A. Use this screen to configure IPv4 firewall rules. Use this screen to configure IPv6 firewall rules. General General Password Time Firmware Upgrade Password Time Setting Firmware Upgrade Use this screen to view and change administrative settings such as system and domain names. Use this screen to change the password of your EMG2881-T20A. Use this screen to change your EMG2881-T20As time and date. Use this screen to upload firmware to your EMG2881-T20A. Backup/
Restore Backup/
Restore Use this screen to backup and restore the configuration or reset the factory defaults to your EMG2881-T20A. EMG2881-T20A Users Guide 22 Chapter 3 Router Mode Table 7 Navigation Panel: Router Mode (continued) LINK Restart Log ROMD TAB System Restart Log ROMD FUNCTION This screen allows you to reboot the EMG2881-T20A without turning the power off. Use this screen to view the list of activities recorded by your EMG2881-T20A. Use this screen to save and/or clean the configuration to/from the ROMD file which can store customized default settings. EMG2881-T20A Users Guide 23 CHAPTER 4 Tutorials 4.1 Overview This chapter provides tutorials for setting up your EMG2881-T20A. Set Up a Wireless Network Using WPS Connect to the EMG2881-T20As WiFi Network Manually (No WPS) Using Multiple SSIDs on the EMG2881-T20A 4.2 Set Up a Wireless Network Using WPS This section gives you an example of how to set up a wireless network using WPS. This example uses the EMG2881-T20A as the AP and a WPS-enabled Android 4.4.2 smartphone as the wireless client. There are two WPS methods for creating a secure connection via the web configurator or utility. This tutorial shows you how to do both. Push Button Configuration (PBC) - create a secure wireless network simply by pressing a button. See Section 4.2.1 on page 24. 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 EMG2881-T20As interface. See Section 4.2.2 on page 25. This is the more secure method, since one device can authenticate the other. 4.2.1 Push Button Configuration (PBC) 1 Make sure that your EMG2881-T20A is turned on and that the device is placed within range of your Android 4.42 smartphone. 2 WPS is enabled by default on the EMG2881-T20A. If not, log into EMG2881-T20As Web Configurator and turn it on in the Configuration > Wireless > WPS screen. You can either press the WPS button on the EMG2881-T20As panel or press the Push Button button in the Configuration > Wireless > WPS screen 3 Go to your phone settings and turn on Wi-Fi. Open the Wi-Fi networks list and tap WPS Push Button or the WPS icon (
). Note: It doesnt matter which button is pressed first. You must press the second button within two minutes of pressing the first one. The EMG2881-T20A 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 EMG2881-T20A securely. EMG2881-T20A Users Guide 24 Chapter 4 Tutorials The following figure shows you an example to set up wireless network and security by pressing a button on both EMG2881-T20A and wireless client (the Android 4.4.2 phone in this example). Figure 9 Example WPS Process: PBC Method Wireless Client WITHIN 2 MINUTES SECURITY INFO COMMUNICATION EMG WPS Press and hold for more than 1 second 4.2.2 PIN Configuration When you use the PIN configuration method, you need to check the clients PIN number and use the EMG2881-T20As configuration interface. 1 Go to your phone settings and turn on Wi-Fi. Open the Wi-Fi networks list and tap WPS PIN Entry to get a PIN number. 2 Enter the clients PIN number to the PIN field in the Configuration > Wireless > WPS screen on the EMG2881-T20A. 3 Click the Start button (or button next to the PIN field) on the EMG2881-T20As WPS screen within two minutes. The EMG2881-T20A 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 EMG2881-T20A securely. The following figure shows you the example to set up wireless network and security on EMG2881-T20A and wireless client (Android 4.4.2 smartphone in this example) by using PIN method. EMG2881-T20A Users Guide 25 Chapter 4 Tutorials Figure 10 Example WPS Process: PIN Method Wireless Client EMG WPS Enter WPS PIN from other device:
WPS START WITHIN 2 MINUTES Authentication by PIN SECURITY INFO COMMUNICATION 4.3 Connect to the EMG2881-T20As WiFi Network Manually (No WPS) In this example, we change the EMG2881-T20As wireless settings, and then manually select the EMG2881-T20As new SSID and enter the Wi-Fi key to connect a wireless client to the EMG2881-T20A. EMG2881-T20A Users Guide 26 Chapter 4 Tutorials 4.3.1 Configuring Wireless Security on the EMG2881-T20A This section shows you how to configure wireless security settings with the following parameters on your EMG2881-T20A. Frequency Band SSID Channel Security 2.4 GHz SSID_Example Auto WPA2-PSK
(Pre-Shared Key: ThisismyWPA-PSKpre-sharedkey) Follow the steps below to configure the wireless settings on your EMG2881-T20A. 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 16). 1 Go to the Configuration > Wireless > Wireless screen to enable the 2.4 GHz wireless network. 2 3 Enter SSID_Example as the SSID and select Auto Channel Selection to have the EMG2881-T20A scans for and select an available channel automatically. Set security mode to WPA2-PSK and enter ThisismyWPA-PSKpre-sharedkey in the Pre-Shared Key field. Select WPA-PSK Compatible to allow wireless devices using WPA-PSK security mode to connect to the EMG2881-T20A. Click Apply. EMG2881-T20A Users Guide 27 Chapter 4 Tutorials 4 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. 4.3.2 Configure Your Notebook Note: In this example, we use a Windows 7 laptop that has a built-in wireless adapter as the wireless client. 1 The EMG2881-T20A supports IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.11a, IEEE 802.11an, and IEEE 802.11ac wireless clients. Make sure that your notebook or computers wireless adapter supports one of these standards. 2 Click the Wi-Fi icon in your computers system tray 3 The Wireless Network Connection screen displays. Click the refresh button to update the list of available wireless APs within range. EMG2881-T20A Users Guide 28 Chapter 4 Tutorials 4 Select SSID_Example and click Connect. 5 The following screen displays if WPS is enabled on the EMG2881-T20A but you didnt press the WPS button. Click Connect using as security key instead. 6 Type the security key in the following screen. Click OK. EMG2881-T20A Users Guide 29 Chapter 4 Tutorials 7 Check the status of your wireless connection in the screen below. 8 If the wireless client keeps trying to connect to or acquiring an IP address from the EMG2881-T20A, make sure you entered the correct security key. If the connection has limited or no connectivity, make sure the EMG2881-T20A is connected to a router with the DHCP server enabled. 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. 4.4 Using Multiple SSIDs on the EMG2881-T20A You can configure more than one SSID on a EMG2881-T20A. See Section 7.4 on page 61. This allows you to configure multiple independent wireless networks on the EMG2881-T20A as if there were multiple APs (virtual APs). Each virtual AP has its own SSID, wireless security type and MAC filtering settings. That is, each SSID on the EMG2881-T20A represents a different access point/wireless network to wireless clients in the network. Clients can associate only with the SSIDs for which they have the correct security settings. Clients using different SSIDs can access the Internet and the wired network behind the EMG2881-T20A (such as a printer). EMG2881-T20A Users Guide 30 Chapter 4 Tutorials For example, you may set up three wireless networks (A, B and C) in your office. A is for workers, B is for guests and C is specific to a VoIP device in the meeting room. 4.4.1 Configuring Security Settings of Multiple SSIDs The EMG2881-T20A is in router mode by default. This example shows you how to configure the SSIDs with the following parameters on your EMG2881-T20A
(in router mode). SSID SECURITY TYPE KEY INTRA-BSS TRAFFIC BLOCKING SSID_Worker WPA2-PSK DoNotStealMyWirelessNetwork No SSID_VoIP SSID_Guest WPA Compatible WPA-PSK WPA Compatible WPA-PSK WPA Compatible VoIPOnly12345678 keyexample123 Yes No MAC FILTERING Disable Allow 00:A0:C5:01:23:45 Disable 1 Connect your computer to the LAN port of the EMG2881-T20A using an Ethernet cable. 2 The default IP address of the EMG2881-T20A in router mode is 192.168.1.1. In this case, your computer must have an IP address in the range between 192.168.1.2 and 192.168.1.254. 3 Click Start > Run on your computer in Windows. Type cmd in the dialog box. Enter ipconfig to show your computers IP address. If your computers IP address is not in the correct range then see Appendix B on page 121 for information on changing your computers IP address. 4 After youve set your computers IP address, open a web browser such as Internet Explorer and type http://192.168.1.1 as the web address in your web browser. 5 Enter the default password (on the device label) as the password and click Login. EMG2881-T20A Users Guide 31 Chapter 4 Tutorials 6 Type a new password and retype it to confirm, then click Apply. Otherwise, click Ignore. 7 Go to Configuration > Wireless > More AP. Click the Edit icon of the first entry to configure wireless and security settings for SSID_Worker. 8 Configure the screen as follows. In this example, you disable Intra-BSS Traffic for SSID_Worker. Click Apply. 9 Click the Edit icon of the second entry to configure wireless and security settings for SSID_VoIP. 10 Configure the screen as follows. You enable Intra-BSS Traffic for SSID_VoIP to allow wireless clients in the same wireless network to communicate with each other. Click Apply. EMG2881-T20A Users Guide 32 Chapter 4 Tutorials 11 Click the Edit icon of the third entry to configure wireless and security settings for SSID_Guest. 12 Configure the screen as follows. In this example, you disable Intra-BSS Traffic for SSID_Guest. Click Apply. EMG2881-T20A Users Guide 33 PART II Technical Reference 34 CHAPTER 5 Monitor 5.1 Overview This chapter discusses read-only information related to the device state of the EMG2881-T20A. To access the Monitor screens, click
. 5.2 What You Can Do Use the Client Tables screen to view information related to your DHCP status (Section 5.3 on page 35). 5.3 Client Tables 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 EMG2881-T20As LAN as a DHCP server or disable it. When configured as a server, the EMG2881-T20A 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 Monitor > Client Tables. Read-only information here relates to your DHCP status. The DHCP table shows current DHCP client information (including MAC Address, and IP Address) of all network clients using the EMG2881-T20As DHCP server. Figure 11 Monitor > Client Tables EMG2881-T20A Users Guide 35 Chapter 5 Monitor The following table describes the labels in this screen. IP Address MAC Address Table 8 Monitor > Client Tables LABEL DESCRIPTION Select the interface from the drop-down list box to display current DHCP client information. Interface This is the index number of the host computer.
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Online This field displays whether the connection to the host computer is up (a yellow bulb) or down (a gray bulb). This field displays the IP address relative to the # field listed above. 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. This field displays the devices interface type or received signal strength indicator (RSSI) that is currently connected to the EMG2881-T20A. Select this if you want to reserve the IP address for this specific MAC address. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to reload the previous configuration for this screen. Reserve Apply Cancel Interface/Rssi EMG2881-T20A Users Guide 36 CHAPTER 6 WAN 6.1 Overview This chapter discusses the EMG2881-T20As WAN screens. Use these screens to configure your EMG2881-
T20A 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 12 LAN and WAN 6.2 What You Can Do Use the Management WAN screen to enter your ISP information and set how the computer acquires its IP, DNS and WAN MAC addresses (Section 6.4 on page 39). Use the NAT > General screen to enable NAT, set a default server and change your EMG2881-T20As port forwarding settings (Section 6.5.1 on page 47). Use the NAT > Port Trigger screen to configure your EMG2881-T20As trigger port settings (Section 6.5.2 on page 49). Use the NAT > Passthrough screen to configure your EMG2881-T20As ALGs and VPN pass-through settings (Section 6.5.3 on page 49). Use the Dynamic DNS screen to change your EMG2881-T20As DDNS settings (Section 6.6 on page 50). Use the Interface Group screen to manually add a LAN and/or WLAN interface to a new group
(Section 6.7 on page 51). 6.3 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 EMG2881-T20A. EMG2881-T20A Users Guide 37 Chapter 6 WAN 6.3.1 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. WAN IP Address The WAN IP address is an IP address for the EMG2881-T20A, which makes it accessible from an outside network. It is used by the EMG2881-T20A to communicate with other devices in other networks. It can be static (fixed) or dynamically assigned by the ISP each time the EMG2881-T20A 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 EMG2881-T20A 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 EMG2881-T20As 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. EMG2881-T20A Users Guide 38 Chapter 6 WAN Multicast Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1 recipient) or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to a group of hosts on the network - not everybody and not just 1. Figure 13 Multicast Example In the multicast example above, systems A and D comprise one multicast group. In multicasting, the server only needs to send one data stream and this is delivered to systems A and D. IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish membership in a multicast group - it is not used to carry user data. The EMG2881-T20A supports both IGMP version 1
(IGMP-v1) and IGMP version 2 (IGMP-v2). At start up, the EMG2881-T20A queries all directly connected networks to gather group membership. After that, the EMG2881-T20A periodically updates this information. IP multicasting can be enabled/
disabled on the EMG2881-T20A WAN interface in the Web Configurator (WAN). Select None to disable IP multicasting on these interfaces. 6.4 Management WAN Use this screen to view, change, or add your EMG2881-T20As Internet access settings. Click Configuration > WAN > Management WAN. The following screen opens. Figure 14 Configuration > WAN > Management WAN EMG2881-T20A Users Guide 39 Chapter 6 WAN The following table describes the labels in this screen. Table 9 Configuration > WAN > Management WAN LABEL
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Name Interface Type VLAN ID IP Address Status Modify DESCRIPTION This is the index number of the connection. This is the service name of the connection. This is the interface of the connection. This shows the type of interface used by this connection. This indicates the VLAN ID number assigned to traffic sent through this connection. This is the WAN IP address used by this connection. This shows the status of the connection. Click the Edit icon to configure the connection. Click the Delete icon to delete this connection from the EMG2881-T20A. A window displays asking you to confirm that you want to delete the connection. 6.4.1 Edit WAN Connection Click the Edit icon next to the connection you want to configure. Use this screen to configure a WAN connection. The screen varies depending on the encapsulation you select. 6.4.1.1 IPoE Encapsulation This screen displays when you select IPoE encapsulation. EMG2881-T20A Users Guide 40 Chapter 6 WAN Figure 15 Configuration > WAN > Management WAN: IPoE Encapsulation (IPv4 Only) The following table describes the labels in this screen. DESCRIPTION Table 10 Configuration > WAN > Management WAN: IPoE Encapsulation LABEL ISP Parameters for Internet Access WAN Name Encapsulation IPv4 / IPv6 Enter the name to use for this connection definition. You must choose the IPoE option when the WAN port is used as a regular Ethernet. Select IPv4 Only if you want the EMG2881-T20A to run IPv4 only. Select Dual Stack to allow the EMG2881-T20A to run IPv4 and IPv6 at the same time. Select IPv6 Only if you want the EMG2881-T20A to run IPv6 only. VLAN Configuration Enable Select the check box to activate VLAN on this WAN interface. Otherwise, deselect the check box to deactivate. EMG2881-T20A Users Guide 41 Chapter 6 WAN Table 10 Configuration > WAN > Management WAN: IPoE Encapsulation (continued) LABEL VID DESCRIPTION Enter a VLAN identifier between 11 to 4094 (the 802.1Q tag specifies only a priority and is referred to as a priority tag). VID 1 (the default VLAN ID) is reserved for a management VLAN. Note: This field is not available when you are configuring the default WAN entry. Select this option If your ISP did not assign you a fixed IP address. This is the default selection. IP Address This is not available when you select IPv4 Only or Dual Stack in the IPv6/IPv4 field. Obtain an IP Address Automatically Static IP Address Select this option If the ISP assigned a fixed IP address. Enter your WAN IP address in this field if you selected Static IP Address. Enter the Subnet Mask in this field. Enter a Gateway IP Address (if your ISP gave you one) in this field. IP Address Subnet Mask Gateway IP Address MTU Size DNS Server First DNS Server Second DNS Server Third DNS Server WAN MAC Address Factory default Set WAN MAC Address IPv6 Address Obtain an IP Address Automatically Static IP Address IPv6 Address Prefix length IPv6 Default Gateway Link Local Only Enter the MTU (Maximum Transmission Unit) size for each packet. If a larger packet arrives, the EMG2881-T20A divides it into smaller fragments. Select Obtained From ISP if your ISP dynamically assigns DNS server information (and the EMG2881-T20A's 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. Select None if you do not want to configure DNS servers. If you do not configure a DNS server, you must know the IP address of a computer in order to access it. The MAC address section allows users to configure the WAN port's MAC address by using the EMG2881-T20As MAC address, or manually entering a MAC address. Select Factory default to use the factory assigned default MAC Address. Select this option and enter the MAC address you want to use. This is not available when you select IPv6 Only or Dual Stack in the IPv6/IPv4 field. Select this if you want to obtain an IPv6 address from a DHCPv6 server. Select DUID-LL (Default) to have the EMG2881-T20A use DUID-LL (DUID Based on Link-layer Address) for identification when exchanging DHCPv6 messages. Select DUID-LLT to have the EMG2881-T20A use DUID-LLT (DUID Based on Link-layer Address Plus Time) for identification when exchanging DHCPv6 messages. Select this if you have a fixed IPv6 address assigned by your ISP. Enter the IPv6 address assigned by your ISP. Enter the address prefix length to specify how many most significant bits in an IPv6 address compose the network address. Enter the IP address of the next-hop gateway. The gateway is a router or switch on the same segment as your EMG2881-T20A's interface(s). The gateway helps forward packets to their destinations. Select this option to use the link-local address which uniquely identifies a device on the local network (the LAN). IPv6 DNS server This is not available when you select IPv6 Only or Dual Stack in the IPv6/IPv4 field. EMG2881-T20A Users Guide 42 Chapter 6 WAN Table 10 Configuration > WAN > Management WAN: IPoE Encapsulation (continued) LABEL First DNS Server DESCRIPTION Select Obtained From ISP to have the EMG2881-T20A get the IPv6 DNS server addresses from the ISP automatically. Select User-Defined and enter the IPv6 DNS server address assigned by the ISP to have the EMG2881-T20A use the IPv6 DNS server addresses you configure manually. Select None if you do not want to configure DNS servers. If you do not configure a DNS server, you must know the IPv6 address of a computer in order to access it. Second DNS Server Third DNS Server Multicast Setup Multicast Setup Select IGMPv1/v2 to enable multicasting. This applies to traffic routed from the WAN to the LAN. Select None to disable this feature. This may cause incoming traffic to be dropped or sent to all connected network devices. Auto-Subnet Configuration Enable Auto-IP-
Change Mode Select this option to have the EMG2881-T20A change its LAN IP address to 10.0.0.1 or 192.168.1.1 accordingly when the EMG2881-T20A gets a dynamic WAN IP address in the same subnet as the LAN IP address. Select this option to have the EMG2881-T20A change its LAN IP address to 10.0.0.1 or 192.168.1.1 accordingly when the EMG2881-T20A gets a DNS server IP address in the same subnet as the LAN IP address. The NAT, DHCP server and firewall functions on the EMG2881-T20A are still available in this mode. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. Apply Cancel 6.4.1.2 PPPoE Encapsulation The EMG2881-T20A 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 EMG2881-T20A (rather than individual computers), the computers on the LAN do not need PPPoE software installed, since the EEMG2881-T20A does that part of the task. Furthermore, with NAT, all of the LANs computers will have access. This screen displays when you select PPPoE encapsulation. EMG2881-T20A Users Guide 43 Chapter 6 WAN Figure 16 Configuration > WAN > Management WAN: PPPoE Encapsulation (IPv4 Only) The following table describes the labels in this screen. DESCRIPTION Table 11 Configuration > WAN > Management WAN: PPPoE Encapsulation LABEL ISP Parameters for Internet Access WAN Name Encapsulation IPv4 / IPv6 Enter the name to use for this connection definition. You must choose the PPPoE option when the WAN port is used as a regular Ethernet. Select IPv4 Only if you want the EMG2881-T20A to run IPv4 only. Select Dual Stack to allow the EMG2881-T20A to run IPv4 and IPv6 at the same time. Select IPv6 Only if you want the EMG2881-T20A to run IPv6 only. EMG2881-T20A Users Guide 44 Chapter 6 WAN VID PPP Information PPP Username PPP Password MTU Size Table 11 Configuration > WAN > Management WAN: PPPoE Encapsulation (continued) LABEL VLAN Configuration Enable DESCRIPTION Select the check box to activate VLAN on this WAN interface. Otherwise, deselect the check box to deactivate. Enter a VLAN identifier between 11 to 4094 (the 802.1Q tag specifies only a priority and is referred to as a priority tag). VID 1 (the default VLAN ID) is reserved for a management VLAN. Note: This field is not available when you are configuring the default WAN entry. Type the user name given to you by your ISP. Type the password associated with the user name above. Enter the Maximum Transmission Unit (MTU) or the largest packet size per frame that your EMG2881-T20A can receive and process. Enter the PPPoE service name specified in the ISP account. Select this option If your ISP did not assign you a fixed IP address. This is the default selection. PPPoE Service Name WAN IP Address Assignment Get automatically from ISP Use Fixed IP Address Select this option If the ISP assigned a fixed IP address. DNS Server First DNS Server Second DNS Server Third DNS Server WAN MAC Address Factory default Set WAN MAC Address IPv6 Address Obtain an IP Address Automatically Select Obtained From ISP if your ISP dynamically assigns DNS server information (and the EMG2881-T20A's 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. Select None if you do not want to configure DNS servers. If you do not configure a DNS server, you must know the IP address of a computer in order to access it. The MAC address section allows users to configure the WAN port's MAC address by using the EMG2881-T20As MAC address, or manually entering a MAC address. Select Factory default to use the factory assigned default MAC Address. Select this option and enter the MAC address you want to use. This is not available when you select IPv6 Only or Dual Stack in the IPv6/IPv4 field. Select this if you want to obtain an IPv6 address from a DHCPv6 server. Select DUID-LL (Default) to have the EMG2881-T20A use DUID-LL (DUID Based on Link-layer Address) for identification when exchanging DHCPv6 messages. Select DUID-LLT to have the EMG2881-T20A use DUID-LLT (DUID Based on Link-layer Address Plus Time) for identification when exchanging DHCPv6 messages. Link Local Only Select this option to use the link-local address which uniquely identifies a device on the local network (the LAN). IPv6 DNS server This is not available when you select IPv6 Only or Dual Stack in the IPv6/IPv4 field. EMG2881-T20A Users Guide 45 Chapter 6 WAN Table 11 Configuration > WAN > Management WAN: PPPoE Encapsulation (continued) LABEL First DNS Server DESCRIPTION Select Obtained From ISP to have the EMG2881-T20A get the IPv6 DNS server addresses from the ISP automatically. Select User-Defined and enter the IPv6 DNS server address assigned by the ISP to have the EMG2881-T20A use the IPv6 DNS server addresses you configure manually. Select None if you do not want to configure DNS servers. If you do not configure a DNS server, you must know the IPv6 address of a computer in order to access it. Second DNS Server Third DNS Server Multicast Setup Multicast Setup Select IGMPv1/v2 to enable multicasting. This applies to traffic routed from the WAN to the LAN. Select None to disable this feature. This may cause incoming traffic to be dropped or sent to all connected network devices. Auto-Subnet Configuration Enable Auto-IP-
Change Mode Select this option to have the EMG2881-T20A change its LAN IP address to 10.0.0.1 or 192.168.1.1 accordingly when the EMG2881-T20A gets a dynamic WAN IP address in the same subnet as the LAN IP address. Select this option to have the EMG2881-T20A change its LAN IP address to 10.0.0.1 or 192.168.1.1 accordingly when the EMG2881-T20A gets a DNS server IP address in the same subnet as the LAN IP address. The NAT, DHCP server and firewall functions on the EMG2881-T20A are still available in this mode. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. Apply Cancel 6.4.1.3 Bridge Encapsulation Select Bridge as the encapsulation mode. The screen varies depending on the item you select in the IPv4 / IPv6 field. If you select IPv4, the following screen appears. Figure 17 Configuration > WAN > Management WAN: Bridge Encapsulation (IPv4 Only) EMG2881-T20A Users Guide 46 Chapter 6 WAN The following table describes the labels in this screen. DESCRIPTION Table 12 Configuration > WAN > Management WAN: Bridge Encapsulation LABEL ISP Parameters for Internet Access WAN Name Encapsulation Enter the name to use for this connection definition. Select Bridge when your ISP provides you more than one IP address and you want the connected computers to get individual IP address from ISPs DHCP server directly. If you select Bridge, you cannot use routing functions, such as QoS, Firewall, DHCP server and NAT on traffic from the selected LAN port(s). Select IPv4 Only if you want the EMG2881-T20A to run IPv4 only. Select Dual Stack to allow the EMG2881-T20A to run IPv4 and IPv6 at the same time. Select IPv6 Only if you want the EMG2881-T20A to run IPv6 only. IPv4 / IPv6 VLAN Configuration Enable VID Select the check box to activate VLAN on this WAN interface. Otherwise, deselect the check box to deactivate. Enter a VLAN identifier between 11 to 4094 (the 802.1Q tag specifies only a priority and is referred to as a priority tag). VID 1 (the default VLAN ID) is reserved for a management VLAN. Note: This field is not available when you are configuring the default WAN entry. IPv6 DNS server This is not available when you select IPv6 Only or Dual Stack in the IPv6/IPv4 field. First DNS Server Select Obtained From ISP to have the EMG2881-T20A get the IPv6 DNS server addresses from the ISP automatically. Select User-Defined and enter the IPv6 DNS server address assigned by the ISP to have the EMG2881-T20A use the IPv6 DNS server addresses you configure manually. Select None if you do not want to configure DNS servers. If you do not configure a DNS server, you must know the IPv6 address of a computer in order to access it. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. Second DNS Server Third DNS Server Apply Cancel 6.5 NAT Use this screen to change your EMG2881-T20As NAT (Network Address Translation) settings. Click Configuration > WAN > NAT. 6.5.1 General Screen Use this screen to enable NAT, set a default server and configure your EMG2881-T20As port forwarding settings to forward incoming service requests to the server(s) on your local network. Click Configuration >
WAN > NAT > General. EMG2881-T20A Users Guide 47 Chapter 6 WAN Figure 18 Configuration > WAN > NAT > General The following table describes the labels in this screen. Table 13 Configuration > WAN > NAT > General LABEL General Network Address Translation (NAT) DESCRIPTION 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 Enable to activate NAT. Select Disable to turn it off. Default Server Setup Default Server Change To Server Port Forwarding (Max Limit : 16)
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Name Protocol External Port Server IP Address Internal Port Add Delete You can decide whether you want to use the default server or specify a server manually. 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 port forwarding summary table below. Select this to use the default server. Select this and manually enter the servers IP address. This is the number of an individual port forwarding server entry. Select a pre-defined service from the drop-down list box. The pre-defined service port number(s) and protocol will be displayed in the port forwarding summary table. Otherwise, select User define to manually enter the port number/range and select the Protocol. Select the transport layer protocol supported by this virtual server. Choices are TCP, UDP, or TCP_UDP. If you have chosen a pre-defined service in the Name field, the protocol will be configured automatically. This shows the port number(s) that identifies the service if you select a pre-defined service. If you select User define in the Name field, enter the port number(s) manually. Select User define to manually enter the inside IP address of the virtual server here. This shows the port number(s) that identifies the service if you select a pre-defined service. If you select User define in the Name field, enter an internal port number manually or leave the field blank for port range forwarding. Click Click to add the rule in the port forwarding summary table. to remove a rule. EMG2881-T20A Users Guide 48 Chapter 6 WAN Table 13 Configuration > WAN > NAT > General (continued) LABEL Apply Cancel DESCRIPTION Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. 6.5.2 Port Trigger Screen To change your EMG2881-T20As trigger port settings, click Configuration > WAN > NAT > Port Trigger. The screen appears as shown. Note: Only one LAN computer can use a trigger port (range) at a time. Figure 19 Configuration > WAN > NAT > Port Trigger The following table describes the labels in this screen. DESCRIPTION Table 14 Configuration > WAN > NAT > Port Trigger LABEL Port Trigger Rules (Max Limit : 32)
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Name This is the rule index number (read-only). Type a unique name (up to 15 characters) for identification purposes. All characters are permitted - including spaces. Incoming is a port (or a range of ports) that a server on the WAN uses when it sends out a particular service. The EMG2881-T20A forwards the traffic with this port (or range of ports) to the client computer on the LAN that requested the service. Type a port number or the starting port number in a range of port numbers. Type a port number or the ending port number in a range of port numbers. The trigger port is a port (or a range of ports) that causes (or triggers) the EMG2881-T20A to record the IP address of the LAN computer that sent the traffic to a server on the WAN. Type a port number or the starting port number in a range of port numbers. Type a port number or the ending port number in a range of port numbers. Click Click Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. to add the rule in the port trigger summary table. to remove a rule. Incoming Port End Port Trigger Port End Port Add Delete Apply Cancel 6.5.3 Passthrough Screen To change your EMG2881-T20As VPN passthrough settings, click Configuration > WAN > NAT >
Passthrough. The screen appears as shown. EMG2881-T20A Users Guide 49 Chapter 6 WAN Figure 20 Configuration > WAN > NAT > Passthrough The following table describes the labels in this screen. Table 15 Configuration > WAN > NAT > Passthrough LABEL VPN Passthrough PPTP DESCRIPTION Select Enable to allow VPN clients to make outbound PPTP connections. It is required in order to connect to a PPTP VPN account. If PPTP is disabled, then when a client sends a request to a VPN server, the server will reply to the EMG2881-T20A and the EMG2881-T20A will drop the request. When PPTP is enabled, the EMG2881-T20A will forward the reply from the VPN server to the client that initiated the request, and the connection will establish successfully. Select Enable to allow VPN clients to make outbound L2TP connections. It is required in order to connect to a L2TP VPN account. If L2TP is disabled, then when a client sends a request to a VPN server, the server will reply to the EMG2881-T20A and the EMG2881-T20A will drop the request. When L2TP is enabled, the EMG2881-T20A will forward the reply from the VPN server to the client that initiated the request, and the connection will establish successfully. Select Enable to allow VPN clients to make outbound IPSec connections. It is required in order to connect to a IPSec VPN account. If IPSEC is disabled, then when a client sends a request to a VPN server, the server will reply to the EMG2881-T20A and the EMG2881-T20A will drop the request. When IPSEC is enabled, the EMG2881-T20A will forward the reply from the VPN server to the client that initiated the request, and the connection will establish successfully. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. L2TP IPSEC Apply Cancel 6.6 Dynamic DNS Screen To change your EMG2881-T20As DDNS, click Configuration > WAN > Dynamic DNS. The screen appears as shown. Figure 21 Configuration > WAN > Dynamic DNS EMG2881-T20A Users Guide 50 Chapter 6 WAN The following table describes the labels in this screen. DESCRIPTION Table 16 Configuration > WAN > Dynamic DNS LABEL Dynamic DNS Setup Dynamic DNS Service Provider Host Name Username Password Apply Cancel Select Enable to use dynamic DNS. Select Disable to turn this feature off. Select the name of your Dynamic DNS service provider. Enter a host names in the field provided. Enter your user name. Enter the password assigned to you. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. 6.7 Interface Group Screen You can manually add a LAN and/or WLAN interface to a new group. Click Configuration > WAN >
Interface Group to open the following screen. Figure 22 Configuration > WAN > Interface Group The following table describes the fields in this screen. Table 17 Configuration > WAN > Interface Group LABEL Add DESCRIPTION Click this to add a new interface grouping rule. You must configure a WAN connection before you can add a new interface grouping rule. See Chapter 6 on page 37 for more information. Interface Grouping Rules
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Name WAN Interface LAN Interfaces Delete This is the rule index number (read-only). This shows the descriptive name of the group. This shows the WAN interfaces in the group. This shows the LAN and/or WLAN interfaces in the group. Click the Delete icon to remove the group. 6.7.1 Add Interface Group Click the Add button in the Interface Group screen to open the following screen. Use this screen to create a new interface group. EMG2881-T20A Users Guide 51 Chapter 6 WAN Note: An interface can belong to a group only. Figure 23 Configuration > WAN > Interface Group > Add New Group The following table describes the fields in this screen. Table 18 Configuration > WAN > Interface Group > Add New Group LABEL Group Name WAN Interfaces used in the group DESCRIPTION Enter a name to identify this group. Select a WAN interface to be used in this group. Select None to not add a WAN interface to this group. Select a LAN or wireless LAN interface in the Available LAN Interfaces and use the left-facing arrow to move it to the Grouped LAN Interfaces to add the interface to this group. To remove a LAN or wireless LAN interface from the Grouped LAN Interfaces, use the righ-facing arrow. Click this button to save your settings back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. Grouped LAN Interfaces Available LAN Interfaces Apply Cancel EMG2881-T20A Users Guide 52 CHAPTER 7 Wireless LAN 7.1 Overview This chapter discusses how to configure the wireless network settings in your EMG2881-T20A. The EMG2881-T20A is able to function both 2.4GHz and 5GHz network at the same time. You can have different wireless and wireless security settings for 2.4GHz and 5GHz wireless LANs. Click Configuration >
Wireless to configure to do so. See the appendices for more detailed information about wireless networks. The following figure provides an example of a wireless network. Figure 24 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 EMG2881-T20A is the AP. EMG2881-T20A Users Guide 53 Chapter 7 Wireless LAN 7.1.1 What You Can Do Use the Wireless screen to turn the wireless connection on or off, set up wireless security between the EMG2881-T20A and the wireless clients, and make other basic configuration changes (Section 7.2 on page 57). Use the More AP screen to set up multiple wireless networks on your EMG2881-T20A (Section 7.4 on page 61). Use the MAC Filter screen to allow or deny wireless stations based on their MAC addresses from connecting to the EMG2881-T20A (Section 7.5 on page 64). Use the Advanced screen to allow intra-BSS networking and set the RTS/CTS Threshold (Section 7.6 on page 65). Use the WPS screen to quickly set up a wireless network with strong security, without having to configure security settings manually (Section 7.7 on page 66). Use the Scheduling screen to set the times your wireless LAN is turned on and off (Section 7.8 on page 68). 7.1.2 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. Wireless Security Overview The following sections introduce different types of wireless security you can set up in the wireless network. 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. 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. 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. EMG2881-T20A Users Guide 54 Chapter 7 Wireless LAN 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. User Authentication You can make every user log in to the wireless network before they can use it. This is called user authentication. However, every wireless client in the wireless network has to support IEEE 802.1x to do this. For wireless networks, there are two typical places to store the user names and passwords for each user. In the AP: this feature is called a local user database or a local database. In a RADIUS server: this is a server used in businesses more than in homes. If your AP does not provide a local user database and if you do not have a RADIUS server, you cannot set up user names and passwords for your users. Unauthorized devices can still see the information that is sent in the wireless network, even if they cannot use the wireless network. Furthermore, there are ways for unauthorized wireless users to get a valid user name and password. Then, they can use that user name and password to use the wireless network. Local user databases also have an additional limitation that is explained in the next section. 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. The types of encryption you can choose depend on the type of user authentication. (See page 55 for information about this.) Table 19 Types of Encryption for Each Type of Authentication Weakest Strongest NO AUTHENTICATION No Security Static WEP WPA-PSK WPA2-PSK RADIUS SERVER WPA WPA2 For example, if the wireless network has a RADIUS server, you can choose WPA or WPA2. If users do not log in to the wireless network, you can choose no encryption, Static WEP, WPA-PSK, or WPA2-PSK. 2. Hexadecimal characters are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F. EMG2881-T20A Users Guide 55 Chapter 7 Wireless LAN Usually, you should set up the strongest encryption that every wireless client in the wireless network supports. For example, suppose the AP does not have a local user database, and you do not have a RADIUS server. Therefore, there is no user authentication. Suppose the wireless network has two wireless clients. Device A only supports WEP, and device B supports WEP and WPA. Therefore, you should set up Static WEP in the wireless network. Note: It is recommended that wireless networks use WPA-PSK, WPA, 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. Note: It is not possible to use WPA-PSK, WPA or stronger encryption with a local user database. In this case, it is better to set up stronger encryption with no authentication than to set up weaker encryption with the local user database. When you select WPA2 or WPA2-PSK in your EMG2881-T20A, you can also select an option (WPA/WPA-
PSK Compatible) to support WPA/WPA-PSK as well. In this case, if some wireless clients support WPA and some support WPA2, you should set up WPA2-PSK or WPA2 (depending on the type of wireless network login) and select the WPA/WPA-PSK Compatible option in the EMG2881-T20A. 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. Guest WLAN Guest WLAN allows you to set up a wireless network where users can access to Internet via the EMG2881-T20A (Z), but not other networks connected to the Z. In the following figure, a guest user can access the Internet from the guest wireless network A via Z but not the home or company network N. Note: The home or company network N and Guest WLAN network are independent networks. Figure 25 Guest Wireless LAN Network A Z N Guest WLAN Bandwidth The Guest WLAN Bandwidth function allows you to restrict the maximum bandwidth for the guest wireless network. Additionally, you can also define bandwidth for your home or office network. An EMG2881-T20A Users Guide 56 Chapter 7 Wireless LAN example is shown next to define maximum bandwidth for your networks (A is Guest WLAN and N is home or company network.) Figure 26 Example: Bandwidth for Different Networks N 600 kbps 100 kbps 300 kbps A 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 4.2 on page 24. 7.2 Wireless LAN Screen Use this screen to configure the SSID and wireless security of the wireless LAN. Note: If you are configuring the EMG2881-T20A from a computer connected to the wireless LAN and you change the EMG2881-T20As 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 EMG2881-T20As new settings. Click Configuration > Wireless to open the Wireless screen. EMG2881-T20A Users Guide 57 Chapter 7 Wireless LAN Figure 27 Configuration > Wireless > Wireless The following table describes the general wireless LAN labels in this screen. Table 20 Configuration > Wireless > Wireless LABEL Band DESCRIPTION This shows the wireless band which this radio profile is using. 2.4GHz is the frequency used by IEEE 802.11b/g/n wireless clients while 5GHz is used by IEEE 802.11a/ac wireless clients. Select Enable to activate the 2.4GHz and/or 5GHz wireless LAN. Select Disable to turn it off. Wireless LAN Name (SSID) Hide SSID Channel Selection Operating Channel Note: You can enable or disable both 2.4GHz and 5GHz wireless LANs by using the WIFI button located on the side panel of the EMG2881-T20A. The SSID (Service Set IDentity) identifies the Service Set with which a wireless client is associated. Enter a descriptive name (up to 32 printable characters found on a typical English language keyboard) 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. This displays the channel the EMG2881-T20A is currently using. EMG2881-T20A Users Guide 58 Chapter 7 Wireless LAN Table 20 Configuration > Wireless > Wireless LABEL Channel Width DESCRIPTION Select the wireless channel width used by EMG2881-T20A. 802.11 Mode A standard 20 MHz channel offers transfer speeds of up to 144Mbps (2.4GHz) or 217Mbps
(5GHZ) whereas a 40MHz channel uses two standard channels and offers speeds of up to 300Mbps (2.4GHz) or 450Mbps (5GHZ). An IEEE 802.11ac-specific 80MHz channel offers speeds of up to 1.3Gbps. Because not all devices support 40 MHz and/or 80 MHz channels, select Auto 20/40 MHz or Auto 20/40/80 MHz to allow the EMG2881-T20A to adjust the channel bandwidth automatically. Select 20 MHz if you want to lessen radio interference with other wireless devices in your neighborhood or the wireless clients do not support channel bonding. If you are in the Wireless LAN 2.4G > General screen, you can select from the following:
802.11b: allows either IEEE 802.11b or IEEE 802.11g compliant WLAN devices to associate with the EMG2881-T20A. In this mode, all wireless devices can only transmit at the data rates supported by IEEE 802.11b. 802.11g: allows IEEE 802.11g compliant WLAN devices to associate with the Device. IEEE 802.11b compliant WLAN devices can associate with the EMG2881-T20A only when they use the short preamble type. 802.11bg: allows either IEEE 802.11b or IEEE 802.11g compliant WLAN devices to associate with the EMG2881-T20A. The EMG2881-T20A adjusts the transmission rate automatically according to the wireless standard supported by the wireless devices. 802.11n: allows IEEE 802.11n compliant WLAN devices to associate with the EMG2881-
T20A. This can increase transmission rates, although IEEE 802.11b or IEEE 802.11g clients will not be able to connect to the EMG2881-T20A. 802.11gn: allows either IEEE 802.11g or IEEE 802.11n compliant WLAN devices to associate with the EMG2881-T20A. The transmission rate of your EMG2881-T20A might be reduced. 802.11 bgn: allows IEEE802.11b, IEEE802.11g and IEEE802.11n compliant WLAN devices to associate with the EMG2881-T20A. The transmission rate of your EMG2881-T20A might be reduced. If you are in the Wireless LAN 5G > General screen, you can select from the following:
802.11a: allows only IEEE 802.11a compliant WLAN devices to associate with the EMG2881-
T20A. 802.11a/an: allows both IEEE802.11n and IEEE802.11a compliant WLAN devices to associate with the EMG2881-T20A. The transmission rate of your EMG2881-T20A might be reduced. 802.11a/an/ac: allows both IEEE802.11a, IEEE802.11n and IEEE802.11ac compliant WLAN devices to associate with the EMG2881-T20A. The transmission rate of your EMG2881-T20A might be reduced. Security Mode Select 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 Section 7.3 on page 59 for detailed information on different security modes. Or you can select No Security to allow any client to associate this network without authentication. Apply Cancel Note:
Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to reload the previous configuration for this screen. See the rest of this chapter for information on the other labels in this screen. 7.3 Wireless Security The screen varies depending on what you select in the Security Mode field. EMG2881-T20A Users Guide 59 Chapter 7 Wireless LAN 7.3.1 No Security Select No Security to allow wireless clients to communicate with the access points without any data encryption. Note: If you do not enable any wireless security on your EMG2881-T20A, your network is accessible to any wireless networking device that is within range. Figure 28 Configuration > Wireless > Wireless: No Security The following table describes the labels in this screen. Table 21 Configuration > Wireless > Wireless: No Security LABEL Security Mode Apply Cancel DESCRIPTION Choose No Security from the drop-down list box. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to reload the previous configuration for this screen. 7.3.2 WPA2-PSK Select WPA2-PSK from the Security Mode list. EMG2881-T20A Users Guide 60 Chapter 7 Wireless LAN Figure 29 Configuration > Wireless > Wireless: WPA2-PSK The following table describes the labels in this screen. Table 22 Configuration > Wireless > Wireless: WPA-PSK/WPA2-PSK LABEL Security Mode WPA-PSK Compatible DESCRIPTION Select WPA2-PSK to enable data encryption. This field appears when you choose WPA2-PSK as the Security Mode. Check this field to allow wireless devices using WPA-PSK security mode to connect to your EMG2881-T20A. Protected Management Frames (PMF) is a protection mechanism of action management frames. PMF Pre-Shared Key Group Key Update Timer Apply Cancel Check this field to allow wireless devices using the PMF protection mechanism to connect to your EMG2881-T20A. WPA-PSK/WPA2-PSK uses a simple common password for authentication. Type a pre-shared key from 8 to 63 case-sensitive keyboard characters. The Group Key Update Timer is the rate at which the AP sends a new group key out to all clients. The default is 3600 seconds (60 minutes). Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to reload the previous configuration for this screen. 7.4 More AP Screen This screen allows you to enable and configure multiple wireless networks and guest wireless network settings on the EMG2881-T20A. EMG2881-T20A Users Guide 61 Chapter 7 Wireless LAN You can configure up to four SSIDs to enable multiple BSSs (Basic Service Sets) on the EMG2881-T20A. This allows you to use one access point to provide several BSSs simultaneously. You can then assign varying security types to different SSIDs. Wireless clients can use different SSIDs to associate with the same access point. Click Configuration > Wireless > More AP. The following screen displays. Figure 30 Configuration > Wireless > More AP The following table describes the labels in this screen. Table 23 Configuration > Wireless > More AP LABEL Band
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Status SSID DESCRIPTION Use 2.4GHz or 5GHz to set up the EMG2881-T20As guest WiFi network. This is the index number of each SSID profile. This shows whether the SSID profile is active (a yellow bulb) or not (a gray bulb). An SSID profile is the set of parameters relating to one of the EMG2881-T20As BSSs. The SSID
(Service Set IDentifier) identifies the Service Set with which a wireless device is associated. This field displays the name of the wireless profile on the network. When a wireless client scans for an AP to associate with, this is the name that is broadcast and seen in the wireless client utility. This field indicates the security mode of the SSID profile. If the user is currently not permitted to access the Internet, you can click Set to allow access for a specified period of time. A screen then displays allowing you to set how long (in hours) the user is allowed to access the Internet. This field displays the amount of Internet access time that remains for each user before the EMG2881-T20A blocks the user from accessing the Internet. 0:0:0 means there is no extra Internet access time. Click the Edit icon to configure the SSID profile. Security Remaining Time Edit 7.4.1 More AP Edit Use this screen to edit an SSID profile. Click the Edit icon next to an SSID in the More AP screen. The following screen displays. EMG2881-T20A Users Guide 62 Chapter 7 Wireless LAN Figure 31 Configuration > Wireless > More AP: Edit The following table describes the labels in this screen. Table 24 Configuration > Wireless > More AP: Edit LABEL Active Name (SSID) DESCRIPTION Select this to activate the SSID profile. The SSID (Service Set IDentity) identifies the Service Set with which a wireless client is associated. Enter a descriptive name (up to 32 printable characters found on a typical English language keyboard) 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. 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 clients can access the wired network and communicate with each other. When Intra-BSS is disabled, wireless clients can still access the wired network but cannot communicate with each other. Check this to have the EMG2881-T20A 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. Select 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 Section 7.3 on page 59 for detailed information on different security modes. Or you can select No Security to allow any client to associate this network without authentication. Note:
This field appears when you choose WPA2-PSK as the Security Mode. Check this field to allow wireless devices using WPA-PSK security mode to connect to your EMG2881-T20A. Protected Management Frames (PMF) is a protection mechanism of action management frames. Check this field to allow wireless devices using the PMF protection mechanism to connect to your EMG2881-T20A. Hide SSID Intra-BSS Traffic WMM QoS Security Mode WPA-PSK Compatible PMF Pre-Shared Key WPA2-PSK uses a simple common password for authentication. Group Key Update Timer Type a pre-shared key from 8 to 63 case-sensitive keyboard characters. The Group Key Update Timer is the rate at which the AP sends a new group key out to all clients. The default is 3600 seconds (60 minutes). EMG2881-T20A Users Guide 63 Chapter 7 Wireless LAN Table 24 Configuration > Wireless > More AP: Edit (continued) LABEL Apply Cancel DESCRIPTION Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to reload the previous configuration for this screen. 7.5 MAC Filter Screen The MAC filter screen allows you to configure the EMG2881-T20A to give exclusive access to devices
(Allow) or exclude devices from accessing the EMG2881-T20A (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 EMG2881-T20As MAC filter settings, click Configuration > Wireless > MAC Filter. The screen appears as shown. Figure 32 Configuration > Wireless > MAC Filter The following table describes the labels in this menu. MAC Address Filter Filter Action Table 25 Configuration > Wireless > MAC Filter LABEL Band DESCRIPTION Select the frequency band to set whether you want to apply the wireless and security settings to the default 2.4GHz or 5GHz wireless LAN. Select to turn on (Enable) or off (Disable) MAC address filtering. Define the filter action for the list of MAC addresses in the MAC Filter Summary table. Select Allow to permit access to the EMG2881-T20A, MAC addresses not listed will be denied access to the EMG2881-T20A. Select Deny to block access to the EMG2881-T20A, MAC addresses not listed will be allowed to access the EMG2881-T20A. MAC Filter Summary
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MAC Address Add/Delete This is the index number of the MAC address. Enter the MAC address of the wireless station that are allowed or denied access to the EMG2881-
T20A. Click to add the rule in the MAC filter summary table. Click to remove a rule. EMG2881-T20A Users Guide 64 Chapter 7 Wireless LAN Table 25 Configuration > Wireless > MAC Filter (continued) LABEL Apply Cancel DESCRIPTION Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to reload the previous configuration for this screen. 7.6 Advanced Screen Use this screen to allow wireless advanced features, such as the output power, RTS/CTS Threshold settings. Click Configuration > Wireless > Advanced. The screen appears as shown. Figure 33 Configuration > Wireless > Advanced The following table describes the labels in this screen. Table 26 Configuration > Wireless > Advanced LABEL Band DESCRIPTION Select the frequency band to set whether you want to apply the wireless and security settings to the default 2.4GHz or 5GHz wireless LAN. Data with its frame size larger than this value will perform the RTS (Request To Send)/CTS (Clear To Send) handshake. RTS/CTS Threshold Fragmentation Threshold This field is not configurable and the EMG2881-T20A automatically changes to use the maximum value if you select 802.11a/an, 802.11a/an/ac, 802.11n, 802.11gn or 802.11bgn in the Wireless LAN 2.4G/5G > General screen. The threshold (number of bytes) for the fragmentation boundary for directed messages. It is the maximum data fragment size that can be sent. This field is not configurable and the EMG2881-T20A automatically changes to use the maximum value if you select 802.11a/an, 802.11a/an/ac, 802.11n, 802.11gn or 802.11bgn in the Wireless LAN 2.4G/5G > General screen. EMG2881-T20A Users Guide 65 Chapter 7 Wireless LAN Table 26 Configuration > Wireless > Advanced (continued) LABEL Intra-BSS Traffic Blocking DESCRIPTION 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 clients can access the wired network and communicate with each other. When Intra-BSS is disabled, wireless clients can still access the wired network but cannot communicate with each other. Set the output power of the EMG2881-T20A in this field. If there is a high density of APs in an area, decrease the output power of the EMG2881-T20A to reduce interference with other APs. Select one of the following 100%, 90%, 75%, 50%, 25% or 10%. Select Enable to have the EMG2881-T20A 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. This field is not configurable and the EMG2881-T20A automatically enables WMM QoS if you select 802.11n, 802.11an, 802.11gn or 802.11bgn in the Expert > Wireless screen. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to reload the previous configuration for this screen. Tx Power QoS Setup WMM QoS Apply Cancel 7.7 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 Configuration > Wireless > WPS. Note: With WPS, wireless clients can only connect to the wireless network using the first SSID on the EMG2881-T20A. EMG2881-T20A Users Guide 66 Chapter 7 Wireless LAN Figure 34 Network > Wireless LAN 2.4G/5G > WPS The following table describes the labels in this screen. Table 27 Network > Wireless LAN 2.4G/5G > WPS LABEL WPS Setup Band DESCRIPTION WPS PIN Code PIN Number Push Button Or input stations PIN number WPS Status Select the frequency band to set whether you want to apply the wireless and security settings to the default 2.4GHz or 5GHz wireless LAN. Select Enable to turn on the WPS feature. Otherwise, select Disable. Select Enable and click Apply to allow the PIN Configuration method. If you select Disable, you cannot create a new PIN number. This is the WPS PIN (Personal Identification Number) of the EMG2881-T20A. Enter this PIN in the configuration utility of the device you want to connect to the EMG2881-T20A using WPS. The PIN is not necessary when you use WPS push-button method. Click Generate to generate a new PIN number. Use this button when you use the PBC (Push Button Configuration) method to configure wireless stationss wireless settings. Click this to start WPS-aware wireless station scanning and the wireless security information synchronization. Use this button when you use the PIN Configuration method to configure wireless stations wireless settings. 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. EMG2881-T20A Users Guide 67 Chapter 7 Wireless LAN Table 27 Network > Wireless LAN 2.4G/5G > WPS (continued) LABEL Status DESCRIPTION This displays Configured when the EMG2881-T20A has connected to a wireless network using WPS or when WPS Enable 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 EMG2881-T20A or you click Release Configuration to remove the configured wireless and wireless security settings. 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 EMG2881-T20A. This is the 802.11 mode used. Only compliant WLAN devices can associate with the EMG2881-T20A. This is the name of the wireless network (the EMG2881-T20As first SSID). This is the type of wireless security employed by the network. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to reload the previous configuration for this screen. Release Configuration 802.11 Mode SSID Security Apply Cancel 7.8 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 Configuration > Wireless > Scheduling tab. Figure 35 Configuration > Wireless > Scheduling The following table describes the labels in this screen. Table 28 Configuration > Wireless > Scheduling LABEL Band DESCRIPTION Select the frequency band to set whether you want to apply the wireless and security settings to the default 2.4GHz or 5GHz wireless LAN. Select Enable to activate the wireless LAN scheduling feature. Select Disable to turn it off. Wireless LAN Scheduling EMG2881-T20A Users Guide 68 Chapter 7 Wireless LAN Table 28 Configuration > Wireless > Scheduling LABEL Internet Access Schedule DESCRIPTION The y-axis shows the time period in days. The x-axis shows the time period in hours. Click Select All or click gray blocks to specify days and times to turn the Wireless LAN on or off. If you click Select All you can not select any specific days and times. Click Clean All to remove all the wireless LAN scheduling. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to reload the previous configuration for this screen. Apply Cancel EMG2881-T20A Users Guide 69 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. Figure 36 LAN Example The LAN screens can help you configure a manage IP address, and partition your physical network into logical networks. 8.2 What You Can Do Use the LAN IP screen to configure the IPv4 and IPv6 addresses for your EMG2881-T20A on the LAN
(Section 8.4 on page 71). Use the Static DHCP screen to assign IP addresses on the LAN to specific individual computers based on their MAC Addresses (Section 8.5 on page 72). Use the IPv6 LAN screen to configure the IPv6 address for your EMG2881-T20A on the LAN (Section 8.6 on page 73). 8.3 What You Need To Know The actual physical connection determines whether the EMG2881-T20A 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. EMG2881-T20A Users Guide 70 Chapter 8 LAN Figure 37 LAN and WAN IP Addresses The LAN parameters of the EMG2881-T20A are preset in the factory with the following values:
IPv4 address of 192.168.1.1 with subnet mask of 255.255.255.0 (24 bits) DHCP server enabled with 128 client IPv4 addresses starting from 192.168.1.33. These parameters should work for the majority of installations. 8.4 LAN IP Screen Use this screen to change the IP address for your EMG2881-T20A. Click Configuration > LAN > LAN IP. Figure 38 Configuration > LAN > LAN IP The following table describes the labels in this screen. Table 29 Configuration > LAN > LAN IP LABEL IP Address IP Subnet Mask DESCRIPTION Type the IP address of your EMG2881-T20A in dotted decimal notation. The subnet mask specifies the network number portion of an IP address. Your EMG2881-T20A 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 EMG2881-T20A. EMG2881-T20A Users Guide 71 Chapter 8 LAN Table 29 Configuration > LAN > LAN IP (continued) LABEL DHCP Server DESCRIPTION Select Enable to activate 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. Enable the DHCP server unless your ISP instructs you to do otherwise. Select Disable to stop the EMG2881-T20A acting as a DHCP server. When configured as a server, the EMG2881-T20A 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. This is the period of time DHCP-assigned addresses is used. DHCP automatically assigns IP addresses to clients when they log in. DHCP centralizes IP address management on central computers that run the DHCP server program. DHCP leases addresses, for a period of time, which means that past addresses are recycled and made available for future reassignment to other systems. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. IP Pool Starting Address Pool Size Lease Time Apply Cancel 8.5 Static DHCP Screen This screen allows you to assign IP addresses on the LAN to specific individual computers based on their MAC addresses. To change your EMG2881-T20As static DHCP settings, click Configuration > LAN > Static DHCP. Figure 39 Configuration > LAN > Static DHCP The following table describes the labels on this screen. Table 30 Configuration > LAN > Static DHCP LABEL
#
DESCRIPTION This is the index number of the static IP table entry (row). Select Auto Detection to automatically detect the MAC address of a computer on your LAN. Otherwise, select User define to enter the MAC address of a computer on your LAN in the MAC Address field. This field displays the MAC address of a computer on your LAN. If you select User define in the # field, enter the MAC address(es) manually. This field displays the LAN IP address of a computer on your LAN. If you select User define in the # field, enter the IP address(es) manually. Click to add the rule in the MAC filter summary table. MAC Address IP Address Add/Delete Click to remove a rule. EMG2881-T20A Users Guide 72 Chapter 8 LAN Table 30 Configuration > LAN > Static DHCP (continued) LABEL Apply Cancel DESCRIPTION Click Apply to save your changes with the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. 8.6 IPv6 LAN Screen Use this screen to configure the IP address for your EMG2881-T20A on the LAN. Click Configuration > LAN
> IPv6 LAN. Figure 40 Configuration > LAN > IPv6 LAN The following table describes the labels in this screen. Table 31 Configuration > LAN > IPv6 LAN LABEL LAN IPv6 Address Assignment Enable_DHCPv6-PD DESCRIPTION Select this option to use DHCPv6 prefix delegation. The EMG2881-T20A will obtain an IPv6 prefix from the ISP or a connected uplink router for the LAN. Autoconfiguration Type Select SLAAC + RDNSS to enable IPv6 stateless auto-configuration on this interface. The interface will generate an IPv6 IP address itself from a prefix obtained from an IPv6 router in the network. Select SLAAC + Stateless DHCPv6 to enable IPv6 stateless auto-configuration on this interface. The interface will get an IPv6 address from an IPv6 router and the DHCP server. The IP address information gets through DHCPv6. Select Stateful DHCPv6 to allow a DHCP server to assign and pass IPv6 network addresses, prefixes and other configuration information to DHCP clients. Enter the beginning of the range of IP addresses that this address object represents. IPv6 Address range
(Start) IPv6 Address range
(End) IPv6 Lifetime Static IP Address Enter the end of the range of IP address that this address object represents. Enter the IPv6 lifetime in the LAN. Select this option to manually enter an IPv6 address if you want to use a static IP address. EMG2881-T20A Users Guide 73 Chapter 8 LAN Table 31 Configuration > LAN > IPv6 LAN (continued) LABEL LAN IPv6 Address DESCRIPTION Enter the LAN IPv6 address you want to assign to your EMG2881-T20A in hexadecimal notation. Enter the 48 to 64 address prefix length to specify in an IPv6 address compose the network address. Enter the preferred lifetime for the prefix. Enter the valid lifetime for the prefix. LAN IPv6 Prefix Length (48~64) Prefix Preferred Lifetime Prefix Valid Lifetime Link Local Only Select this option to only use the link local address on the EMG2881-T20A interfaces in the LAN. ULA Select this option to identify a unique local address of the EMG2881-T20A in the LAN. RA period Minimum RA period Apply Cancel Enter the minimum time in seconds between router advertisement messages. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. EMG2881-T20A Users Guide 74 CHAPTER 9 Applications 9.1 Overview This chapter shows you how to configure bandwidth management and UPnP. Quality of Service (QoS) Quality of Service (QoS) refers to both a networks ability to deliver data with minimum delay, and the networking methods used to control the use of bandwidth. Without QoS, all traffic data is equally likely to be dropped when the network is congested. This can cause a reduction in network performance and make the network inadequate for time-critical application such as video-on-demand. Configure QoS on the EMG2881-T20A to group and prioritize application traffic and fine-tune network performance. Setting up QoS involves these steps:
1 Configure classifiers to sort traffic into different flows. 2 Assign priority and define actions to be performed for a classified traffic flow. The EMG2881-T20A assigns each packet a priority and then queues the packet accordingly. Packets assigned a high priority are processed more quickly than those with low priority if there is congestion, allowing time-sensitive applications to flow more smoothly. Time-sensitive applications include both those that require a low level of latency (delay) and a low level of jitter (variations in delay) such as Voice over IP (VoIP) or Internet gaming, and those for which jitter alone is a problem such as Internet radio or streaming video. This chapter contains information about configuring QoS and editing classifiers. Universal Plug-and-Play (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. 9.1.1 What You Can Do in this Chapter The QoS General screen lets you enable or disable QoS and set the upstream bandwidth (Section 9.3 on page 78). The Queue Setup screen lets you configure QoS queue assignment (Section 9.4 on page 79). The Class Setup screen lets you add, edit or delete QoS classifiers (Section 9.5 on page 80). Use the UPnP screen to enable UPnP on your EMG2881-T20A (Section 9.6 on page 83). EMG2881-T20A Users Guide 75 Chapter 9 Applications 9.2 What You Need to Know The following terms and concepts may help as you read through this chapter. QoS versus CoS QoS is used to prioritize source-to-destination traffic flows. All packets in the same flow are given the same priority. CoS (class of service) is a way of managing traffic in a network by grouping similar types of traffic together and treating each type as a class. You can use CoS to give different priorities to different packet types. CoS technologies include IEEE 802.1p layer 2 tagging and DiffServ (Differentiated Services or DS). IEEE 802.1p tagging makes use of three bits in the packet header, while DiffServ is a new protocol and defines a new DS field, which replaces the eight-bit ToS (Type of Service) field in the IP header. Tagging and Marking In a QoS class, you can configure whether to add or change the DSCP (DiffServ Code Point) value, IEEE 802.1p priority level and VLAN ID number in a matched packet. When the packet passes through a compatible network, the networking device, such as a backbone switch, can provide specific treatment or service based on the tag or marker. Traffic Shaping Bursty traffic may cause network congestion. Traffic shaping regulates packets to be transmitted with a pre-configured data transmission rate using buffers (or queues). Your EMG2881-T20A uses the Token Bucket algorithm to allow a certain amount of large bursts while keeping a limit at the average rate. Traffic Rate Traffic Rate c i f f a r T c i f f a r T Time Time
(Before Traffic Shaping)
(After Traffic Shaping) EMG2881-T20A Users Guide 76 Chapter 9 Applications Traffic Policing Traffic policing is the limiting of the input or output transmission rate of a class of traffic on the basis of user-defined criteria. Traffic policing methods measure traffic flows against user-defined criteria and identify it as either conforming, exceeding or violating the criteria. Traffic Rate Traffic Rate c i f f a r T c i f f a r T Time Time
(Before Traffic Policing)
(After Traffic Policing) The EMG2881-T20A supports three incoming traffic metering algorithms: Token Bucket Filter (TBF), Single Rate Two Color Maker (srTCM), and Two Rate Two Color Marker (trTCM). You can specify actions which are performed on the colored packets. See Section 9.7 on page 83 for more information on each metering algorithm. 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 EMG2881-T20A allows multicast messages on the LAN only. All UPnP-enabled devices may communicate freely with each other without additional configuration. Disable UPnP if this is not your intention. EMG2881-T20A Users Guide 77 Chapter 9 Applications 9.3 The QoS General Screen Click Configuration > Applications > Bandwidth Management > QoS General to open the screen as shown next. Use this screen to enable or disable QoS and set the upstream bandwidth. See Section 9.1 on page 75 for more information. Figure 41 Configuration > Applications > Bandwidth Management > QoS General The following table describes the labels in this screen. Table 32 Management > Bandwidth MGMT > General LABEL QoS State WAN Managed Upstream Bandwidth DESCRIPTION Select the Enable check box to turn on QoS to improve your network performance. Enter the amount of upstream bandwidth for the WAN interfaces that you want to allocate using QoS. The recommendation is to set this speed to match the interfaces actual transmission speed. For example, set the WAN interfaces speed to 100000 kbps if your Internet connection has an upstream transmission speed of 100 Mbps. You can set this number higher than the interfaces actual transmission speed. The EMG2881-
T20A uses up to 95% of the DSL ports actual upstream transmission speed even if you set this number higher than the DSL ports actual transmission speed. You can also set this number lower than the interfaces actual transmission speed. This will cause the EMG2881-T20A to not use some of the interfaces available bandwidth. If you leave this field blank, the EMG2881-T20A automatically sets this number to be 95% of the WAN interfaces actual upstream transmission speed. Enter the amount of downstream bandwidth for the LAN interfaces (including WLAN) that you want to allocate using QoS. The recommendation is to set this speed to match the WAN interfaces actual transmission speed. For example, set the LAN managed downstream bandwidth to 100000 kbps if you use a 100 Mbps wired Ethernet WAN connection. You can also set this number lower than the WAN interfaces actual transmission speed. This will cause the EMG2881-T20A to not use some of the interfaces available bandwidth. LAN Managed Downstream Bandwidth If you leave this field blank, the EMG2881-T20A automatically sets this to the LAN interfaces maximum supported connection speed. Click Apply to save your changes. Click Cancel to restore your previously saved settings. Apply Cancel EMG2881-T20A Users Guide 78 Chapter 9 Applications 9.4 The Queue Setup Screen Use this screen to configure QoS queue assignment. Click Configuration > Applications > Bandwidth Management > Queue Setup to open the screen as shown next. Figure 42 Configuration > Applications > Bandwidth Management > Queue Setup The following table describes the labels in this screen. DESCRIPTION Click this button to create a new queue entry. Table 33 Management > Bandwidth MGMT > Queue Setup LABEL Add new Queue
#
Status Name Interface Priority Modify This is the index number of the entry. This field displays whether the queue is active or not. A yellow bulb signifies that this queue is active. A gray bulb signifies that this queue is not active. This shows the descriptive name of this queue. This shows the name of the EMG2881-T20As interface through which traffic in this queue passes. This shows the priority of this queue. Click the Edit icon to edit the queue. Click the Delete icon to delete an existing queue. Note that subsequent rules move up by one when you take this action. 9.4.1 Add/Edit a Queue Click Add New Queue or the Edit icon in the Queue Setup screen to configure a queue. Figure 43 Configuration > Applications > Bandwidth Management > Queue Setup: Add/Edit new queue EMG2881-T20A Users Guide 79 Chapter 9 Applications The following table describes the labels in this screen. Table 34 Management > Bandwidth MGMT > Queue Setup: Add/Edit new queue LABEL Active Name DESCRIPTION Select to enable or disable this queue. Enter the descriptive name of this queue. Note that \"<>%\\^[]`\+\$\,='#&@.:() are not allowed. Select the interface to which this queue is applied. Select the priority level (from 1 to 7) of this queue. The smaller the number, the higher the priority level. Traffic assigned to higher priority queues gets through faster while traffic in lower priority queues is dropped if the network is congested. Click this to return to the previous screen. Click this to save your changes. Click this to exit this screen without saving. To Interface Priority Back Apply Cancel 9.5 The Class Setup Screen Use this screen to add, edit or delete QoS classifiers. A classifier groups traffic into data flows according to specific criteria such as the source address, destination address, source port number, destination port number or incoming interface. For example, you can configure a classifier to select traffic from the same protocol port (such as Telnet) to form a flow. You can give different priorities to traffic that the EMG2881-T20A forwards out through the WAN interface. Give high priority to voice and video to make them run more smoothly. Similarly, give low priority to many large file downloads so that they do not reduce the quality of other applications. Click Configuration > Applications > Bandwidth Management > Class Setup to open the following screen. Figure 44 Configuration > Applicatioin > Bandwidth Management > Class Setup The following table describes the labels in this screen. Table 35 Configuration > Applications > Bandwidth Management > Class Setup LABEL Add new Classifier
#
Status DESCRIPTION Click this to create a new classifier. This is the index number of the entry. This field displays whether the classifier is active or not. A yellow bulb signifies that this classifier is active. A gray bulb signifies that this classifier is not active. This is the name of the classifier. Class Name EMG2881-T20A Users Guide 80 Chapter 9 Applications Table 35 Configuration > Applications > Bandwidth Management > Class Setup (continued) LABEL Classification Criteria To Queue Modify DESCRIPTION This shows criteria specified in this classifier, for example the interface from which traffic of this class should come and the source MAC address of traffic that matches this classifier. This is the name of the queue in which traffic of this classifier is put. Click the Edit icon to edit the classifier. Click the Delete icon to delete an existing classifier. Note that subsequent rules move up by one when you take this action. 9.5.1 Add/Edit a Classifier Click Add New Classifier in the Class Setup screen or the Edit icon next to a classifier to open the following screen. Figure 45 Configuration > Applications > Bandwidth Management > Class Setup: Add/Edit new class EMG2881-T20A Users Guide 81 Chapter 9 Applications The following table describes the labels in this screen. DESCRIPTION Table 36 Configuration > Applications > Bandwidth Management > Class Setup: Add/Edit new class LABEL Step 1: Class Configuration Active Class Name Select this to enable this classifier. Enter a descriptive name of up to 15 printable English keyboard characters, not including spaces. Select an existing number for where you want to put this classifier to move the classifier to the number you selected after clicking Apply. Select Last to put this rule in the back of the classifier list. Classification Order Step 2: Criteria Configuration Basic WAN interface(LAN interface) If you select From LAN in the Interface field, you can select specific interface(s) from which traffic is received. ra0 ~ ra3 means wireless interfaces WLAN0 to WLAN3. If you select From WAN in the Interface field, you can select a specific WAN connection
(PVC0~PVC2) from which traffic is received. Source Address Subnet Netmask Port Range Destination Address Subnet Netmask Port Range Others Packet Length DSCP TCP ACK Select the check box and enter the source IP address in dotted decimal notation. A blank source IP address means any source IP address. Enter the source subnet mask. If you select TCP or UDP in the IP Protocol field, select the check box and enter the port number(s) of the source. Select the check box and enter the source IP address in dotted decimal notation. A blank source IP address means any source IP address. Enter the source subnet mask. If you select TCP or UDP in the IP Protocol field, select the check box and enter the port number(s) of the source. This field is available only when you select IP in the Ether Type field. Select this option and enter the minimum and maximum packet length (from 46 to 1500) in the fields provided. This field is available only when you select IP in the Ether Type field. Select this option and specify a DSCP (DiffServ Code Point) number between 0 and 63 in the field provided. This field is available only when you select IP in the Ether Type field. If you select this option, the matched TCP packets must contain the ACK (Acknowledge) flag. Step 3: Outgoing queue selection To Queue Index Select a queue that applies to this class. You should have configured a queue in the Queue Setup screen already. Click this to return to the previous screen. Click this to save your changes. Click this to exit this screen without saving. Back Apply Cancel EMG2881-T20A Users Guide 82
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Chapter 9 Applications 9.6 UPnP Screen Use this screen to enable UPnP on your EMG2881-T20A. Click Configuration > Applications > UPnP to display the screen shown next. Figure 46 Configuration > Applications > UPnP The following table describes the fields in this screen. Table 37 Configuration > Applications > UPnP LABEL UPnP DESCRIPTION Select Enable to activate UPnP. Be aware that anyone could use a UPnP application to open the web configurator's login screen without entering the EMG2881-T20A's IP address
(although you must still enter the password to access the web configurator). Click Apply to save the setting to the EMG2881-T20A. Click Cancel to return to the previously saved settings. Apply Cancel 9.7 Technical Reference The following section contains additional technical information about the EMG2881-T20A features described in this chapter. IEEE 802.1Q Tag The IEEE 802.1Q standard defines an explicit VLAN tag in the MAC header to identify the VLAN membership of a frame across bridges. A VLAN tag includes the 12-bit VLAN ID and 3-bit user priority. The VLAN ID associates a frame with a specific VLAN and provides the information that devices need to process the frame across the network. IEEE 802.1p specifies the user priority field and defines up to eight separate traffic types. The following table describes the traffic types defined in the IEEE 802.1d standard (which incorporates the 802.1p). TRAFFIC TYPE Table 38 IEEE 802.1p Priority Level and Traffic Type PRIORITY LEVEL Level 7 Level 6 Level 5 Level 4 Typically used for network control traffic such as router configuration messages. Typically used for voice traffic that is especially sensitive to jitter (jitter is the variations in delay). Typically used for video that consumes high bandwidth and is sensitive to jitter. Typically used for controlled load, latency-sensitive traffic such as SNA (Systems Network Architecture) transactions. Typically used for excellent effort or better than best effort and would include important business traffic that can tolerate some delay. This is for spare bandwidth. Level 3 Level 2 EMG2881-T20A Users Guide 83 Chapter 9 Applications Table 38 IEEE 802.1p Priority Level and Traffic Type PRIORITY LEVEL Level 1 TRAFFIC TYPE Level 0 DiffServ This is typically used for non-critical background traffic such as bulk transfers that are allowed but that should not affect other applications and users. Typically used for best-effort traffic. QoS is used to prioritize source-to-destination traffic flows. All packets in the flow are given the same priority. You can use CoS (class of service) to give different priorities to different packet types. DiffServ (Differentiated Services) is a class of service (CoS) model that marks packets so that they receive specific per-hop treatment at DiffServ-compliant network devices along the route based on the application types and traffic flow. Packets are marked with DiffServ Code Points (DSCPs) indicating the level of service desired. This allows the intermediary DiffServ-compliant network devices to handle the packets differently depending on the code points without the need to negotiate paths or remember state information for every flow. In addition, applications do not have to request a particular service or give advanced notice of where the traffic is going. DSCP and Per-Hop Behavior DiffServ defines a new Differentiated Services (DS) field to replace the Type of Service (TOS) field in the IP header. The DS field contains a 2-bit unused field and a 6-bit DSCP field which can define up to 64 service levels. The following figure illustrates the DS field. DSCP is backward compatible with the three precedence bits in the ToS octet so that non-DiffServ compliant, ToS-enabled network device will not conflict with the DSCP mapping. DSCP (6 bits) Unused (2 bits) The DSCP value determines the forwarding behavior, the PHB (Per-Hop Behavior), that each packet gets across the DiffServ network. Based on the marking rule, different kinds of traffic can be marked for different kinds of forwarding. Resources can then be allocated according to the DSCP values and the configured policies. IP Precedence Similar to IEEE 802.1p prioritization at layer-2, you can use IP precedence to prioritize packets in a layer-3 network. IP precedence uses three bits of the eight-bit ToS (Type of Service) field in the IP header. There are eight classes of services (ranging from zero to seven) in IP precedence. Zero is the lowest priority level and seven is the highest. Automatic Priority Queue Assignment If you enable QoS on the EMG2881-T20A, the EMG2881-T20A can automatically base on the IEEE 802.1p priority level, IP precedence and/or packet length to assign priority to traffic which does not match a class. EMG2881-T20A Users Guide 84 Chapter 9 Applications The following table shows you the internal layer-2 and layer-3 QoS mapping on the EMG2881-T20A. On the EMG2881-T20A, traffic assigned to higher priority queues gets through faster while traffic in lower index queues is dropped if the network is congested. Table 39 Internal Layer2 and Layer3 QoS Mapping IP PACKET LENGTH
(BYTE)
>1100 250~1100
<250 PRIORITY QUEUE 0 1 2 3 4 5 6 7 LAYER 2 IEEE 802.1P USER PRIORITY
(ETHERNET PRIORITY) 1 2 0 3 4 5 6 7 LAYER 3 TOS (IP PRECEDENCE) 0 0 1 2 3 4 5 6 7 DSCP 000000 000000 001110 001100 001010 001000 010110 010100 010010 010000 011110 011100 011010 011000 100110 100100 100010 100000 101110 101000 110000 111000 Token Bucket The token bucket algorithm uses tokens in a bucket to control when traffic can be transmitted. The bucket stores tokens, each of which represents one byte. The algorithm allows bursts of up to b bytes which is also the bucket size, so the bucket can hold up to b tokens. Tokens are generated and added into the bucket at a constant rate. The following shows how tokens work with packets:
A packet can be transmitted if the number of tokens in the bucket is equal to or greater than the size of the packet (in bytes). After a packet is transmitted, a number of tokens corresponding to the packet size is removed from the bucket. EMG2881-T20A Users Guide 85 Chapter 9 Applications If there are no tokens in the bucket, the EMG2881-T20A stops transmitting until enough tokens are generated. If not enough tokens are available, the EMG2881-T20A treats the packet in either one of the following ways:
In traffic shaping:
Holds it in the queue until enough tokens are available in the bucket. In traffic policing:
Drops it. Transmits it but adds a DSCP mark. The EMG2881-T20A may drop these marked packets if the network is overloaded. Configure the bucket size to be equal to or less than the amount of the bandwidth that the interface can support. It does not help if you set it to a bucket size over the interfaces capability. The smaller the bucket size, the lower the data transmission rate and that may cause outgoing packets to be dropped. A larger transmission rate requires a big bucket size. For example, use a bucket size of 10 kbytes to get the transmission rate up to 10 Mbps. Single Rate Three Color Marker The Single Rate Three Color Marker (srTCM, defined in RFC 2697) is a type of traffic policing that identifies packets by comparing them to one user-defined rate, the Committed Information Rate (CIR), and two burst sizes: the Committed Burst Size (CBS) and Excess Burst Size (EBS). The srTCM evaluates incoming packets and marks them with one of three colors which refer to packet loss priority levels. High packet loss priority level is referred to as red, medium is referred to as yellow and low is referred to as green. The srTCM is based on the token bucket filter and has two token buckets (CBS and EBS). Tokens are generated and added into the bucket at a constant rate, called Committed Information Rate (CIR). When the first bucket (CBS) is full, new tokens overflow into the second bucket (EBS). All packets are evaluated against the CBS. If a packet does not exceed the CBS it is marked green. Otherwise it is evaluated against the EBS. If it is below the EBS then it is marked yellow. If it exceeds the EBS then it is marked red. The following shows how tokens work with incoming packets in srTCM:
A packet arrives. The packet is marked green and can be transmitted if the number of tokens in the CBS bucket is equal to or greater than the size of the packet (in bytes). After a packet is transmitted, a number of tokens corresponding to the packet size is removed from the CBS bucket. If there are not enough tokens in the CBS bucket, the EMG2881-T20A checks the EBS bucket. The packet is marked yellow if there are sufficient tokens in the EBS bucket. Otherwise, the packet is marked red. No tokens are removed if the packet is dropped. Two Rate Three Color Marker The Two Rate Three Color Marker (trTCM, defined in RFC 2698) is a type of traffic policing that identifies packets by comparing them to two user-defined rates: the Committed Information Rate (CIR) and the Peak Information Rate (PIR). The CIR specifies the average rate at which packets are admitted to the EMG2881-T20A Users Guide 86 Chapter 9 Applications network. The PIR is greater than or equal to the CIR. CIR and PIR values are based on the guaranteed and maximum bandwidth respectively as negotiated between a service provider and client. The trTCM evaluates incoming packets and marks them with one of three colors which refer to packet loss priority levels. High packet loss priority level is referred to as red, medium is referred to as yellow and low is referred to as green. The trTCM is based on the token bucket filter and has two token buckets (Committed Burst Size (CBS) and Peak Burst Size (PBS)). Tokens are generated and added into the two buckets at the CIR and PIR respectively. All packets are evaluated against the PIR. If a packet exceeds the PIR it is marked red. Otherwise it is evaluated against the CIR. If it exceeds the CIR then it is marked yellow. Finally, if it is below the CIR then it is marked green. The following shows how tokens work with incoming packets in trTCM:
A packet arrives. If the number of tokens in the PBS bucket is less than the size of the packet (in bytes), the packet is marked red and may be dropped regardless of the CBS bucket. No tokens are removed if the packet is dropped. If the PBS bucket has enough tokens, the EMG2881-T20A checks the CBS bucket. The packet is marked green and can be transmitted if the number of tokens in the CBS bucket is equal to or greater than the size of the packet (in bytes). Otherwise, the packet is marked yellow. 9.7.1 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 EMG2881-T20A. Make sure the computer is connected to a LAN port of the EMG2881-T20A. Turn on your computer and the EMG2881-T20A. 9.7.1.1 Auto-discover Your UPnP-enabled Network Device 1 Click start and Control Panel. Double-click Network Connections. An icon displays under Internet Gateway. 2 Right-click the icon and select Properties. Figure 47 Network Connections EMG2881-T20A Users Guide 87 Chapter 9 Applications 3 In the Internet Connection Properties window, click Settings to see the port mappings there were automatically created. Figure 48 Internet Connection Properties 4 You may edit or delete the port mappings or click Add to manually add port mappings. Figure 49 Internet Connection Properties: Advanced Settings Figure 50 Internet Connection Properties: Advanced Settings: Add Note: When the UPnP-enabled device is disconnected from your computer, all port mappings will be deleted automatically. EMG2881-T20A Users Guide 88 Chapter 9 Applications 5 Select Show icon in notification area when connected option and click OK. An icon displays in the system tray. Figure 51 System Tray Icon 6 Double-click on the icon to display your current Internet connection status. Figure 52 Internet Connection Status 9.7.2 Web Configurator Easy Access With UPnP, you can access the web-based configurator on the EMG2881-T20A without finding out the IP address of the EMG2881-T20A first. This comes helpful if you do not know the IP address of the EMG2881-
T20A. Follow the steps below to access the web configurator. 1 Click Start and then Control Panel. 2 Double-click Network Connections. 3 Select My Network Places under Other Places. EMG2881-T20A Users Guide 89 Chapter 9 Applications Figure 53 Network Connections 4 An icon with the description for each UPnP-enabled device displays under Local Network. 5 Right-click on the icon for your EMG2881-T20A and select Invoke. The web configurator login screen displays. Figure 54 Network Connections: My Network Places 6 Right-click on the icon for your EMG2881-T20A and select Properties. A properties window displays with basic information about the EMG2881-T20A. EMG2881-T20A Users Guide 90 Chapter 9 Applications Figure 55 Network Connections: My Network Places: Properties: Example EMG2881-T20A Users Guide 91 CHAPTER 10 Security 10.1 Overview Use these screens to enable and configure the firewall that protects your EMG2881-T20A 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 56 Default Firewall Action 10.1.1 What You Can Do Use the IPv4 Firewall screen to enable or disable the EMG2881-T20As IPv4 firewall (Section 10.2 on page 93). Use the IPv6 Firewall screen to enable or disable the EMG2881-T20As IPv6 firewall (Section 10.3 on page 95). 10.1.2 What You Need To Know The following terms and concepts may help as you read through this chapter. EMG2881-T20A Users Guide 92 Chapter 10 Security About the EMG2881-T20A Firewall The EMG2881-T20As firewall feature physically separates the LAN and the WAN and acts as a secure gateway for all data passing between the networks. It is a stateful inspection firewall and is designed to protect against Denial of Service attacks when activated (click the IPv4 Firewall or IPv6 Firewall tab under Security and then click the Enable Firewall check box). The EMG2881-T20A's purpose is to allow a private Local Area Network (LAN) to be securely connected to the Internet. The EMG2881-T20A 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 EMG2881-T20A 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 EMG2881-T20A 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. Guidelines For Enhancing Security With Your Firewall 1 Change the default password via Web Configurator. 2 3 Think about access control before you connect to the network in any way, including attaching a modem to the port. Limit who can access your router. 4 Don't enable any local service (such as NTP) that you don't use. Any enabled service could present a potential security risk. A determined hacker might be able to find creative ways to misuse the enabled services to access the firewall or the network. 5 6 7 For local services that are enabled, protect against misuse. Protect by configuring the services to communicate only with specific peers, and protect by configuring rules to block packets for the services at specific interfaces. Protect against IP spoofing by making sure the firewall is active. Keep the firewall in a secured (locked) room. 10.2 IPv4 Firewall Screen Use this screen to enable or disable the EMG2881-T20As IPv4 firewall. Click Configuration > Security >
IPv4 Firewall to open the firewall setup screen. EMG2881-T20A Users Guide 93 Chapter 10 Security Figure 57 Configuration > Security > IPv4 Firewall The following table describes the labels in this screen. Table 40 Configuration > Security > IPv4 Firewall LABEL ICMP Respond to Ping on Firewall Setup Enable Firewall Enable Firewall Rule Enable Firewall Rule Filter table type Add Firewall Rule Service Name MAC Address 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. The EMG2881-T20A will not respond to any incoming Ping requests when Disable is selected. Select LAN to reply to incoming LAN Ping requests. Select WAN to reply to incoming WAN Ping requests. Otherwise select LAN&WAN to reply to all incoming LAN and WAN Ping requests. Select this check box to activate the firewall. The EMG2881-T20A performs access control and protects against Denial of Service (DoS) attacks when the firewall is activated. Select this check box to activate the firewall rules that you define (see Add Firewall Rule below). Select DROP to silently discard the packets which meet the firewall rules. The others are accepted. Select ACCEPT to allow the passage of the packets which meet the firewall rules. The others are blocked. Enter a name that identifies or describes the firewall rule. Enter the MAC address of the computer for which the firewall rule applies. EMG2881-T20A Users Guide 94 Chapter 10 Security Table 40 Configuration > Security > IPv4 Firewall (continued) LABEL Dest IP Address DESCRIPTION Enter the IP address of the computer to which traffic for the application or service is entering. Source IP Address The EMG2881-T20A applies the firewall rule to traffic initiating from this computer. Enter the IP address of the computer that initializes traffic for the application or service. Protocol Dest Port Range The EMG2881-T20A applies the firewall rule to traffic initiating from this computer. Select the protocol (TCP, UDP or ICMP) used to transport the packets for which you want to apply the firewall rule. This is the port number/range of the destination that define the traffic type, for example TCP port 80 defines web traffic. Source Port Range This is the port number/range of the source that define the traffic type, for example TCP port 80 defines web traffic. Click Add Rule to save the firewall rule. Add Rule Firewall Rule
#
Service Name MAC address Dest IP Source IP Protocol Dest Port Range This is your firewall rule number. The ordering of your rules is important as rules are applied in turn. This is a name that identifies or describes the firewall rule. This is the MAC address of the computer for which the firewall rule applies. This is the IP address of the computer to which traffic for the application or service is entering. This is the IP address of the computer from which traffic for the application or service is initialized. This is the protocol (TCP, UDP or ICMP) used to transport the packets for which you want to apply the firewall rule. This is the port number/range of the destination that define the traffic type, for example TCP port 80 defines web traffic. Source Port Range This is the port number/range of the source that define the traffic type, for example TCP port Delete Apply Cancel to remove the firewall rule. 80 defines web traffic. Click Click Apply to save the settings. Click Cancel to start configuring this screen again. 10.3 IPv6 Firewall Screen This chapter shows you how to enable and create IPv6 firewall rules to filter IPv6 traffic. EMG2881-T20A Users Guide 95 Chapter 10 Security Click Configuration > Security > IPv6 Firewall. The IPv6 Firewall screen appears as shown. Figure 58 Configuration > Security > IPv6 Firewall The following table describes the labels in this screen. Table 41 Configuration > Security > IPv6 Firewall LABEL Enable Firewall Rule Enable Firewall Rule DESCRIPTION Filter table type Add Firewall Rule Service Name MAC Address Dest IP Address Source IP Address Protocol Dest Port Range Source Port Range Add Rule Firewall Rule Select this check box to activate the firewall rules that you define (see Add Firewall Rule below). Select DROP to silently discard the packets which meet the firewall rules. The others are accepted. Select ACCEPT to allow the passage of the packets which meet the firewall rules. The others are blocked. Enter a name that identifies or describes the firewall rule. Enter the MAC address of the computer for which the firewall rule applies. Enter the IPv6 address of the computer to which traffic for the application or service is entering. The EMG2881-T20A applies the firewall rule to traffic destined for this computer. Enter the IPv6 address of the computer that initializes traffic for the application or service. The EMG2881-T20A applies the firewall rule to traffic initiating from this computer. Select the protocol (TCP, UDP or ICMPv6) used to transport the packets for which you want to apply the firewall rule. Enter the port number/range of the destination that defines the traffic type, for example TCP port 80 defines web traffic. Enter the port number/range of the source that defines the traffic type, for example TCP port 80 defines web traffic. Click Add Rule to save the firewall rule. EMG2881-T20A Users Guide 96 Chapter 10 Security Table 41 Configuration > Security > IPv6 Firewall (continued) LABEL
#
DESCRIPTION This is your firewall rule number. The ordering of your rules is important as rules are applied in turn. This is a name that identifies or describes the firewall rule. This is the MAC address of the computer for which the firewall rule applies. This is the IP address of the computer to which traffic for the application or service is entering. This is the IP address of the computer to which traffic for the application or service is initialized. This is the protocol (TCP, UDP or ICMPv6) used to transport the packets for which you want to apply the firewall rule. This is the port number/range of the destination that defines the traffic type, for example TCP port 80 defines web traffic. This is the port number/range of the source that defines the traffic type, for example TCP port 80 defines web traffic. Click Click Apply to save the settings. Click Cancel to restore your previously saved settings. to remove the firewall rule. ServiceName MAC Address Dest IP Source IP Protocol Dest Port Range Source Port Range Delete Apply Cancel EMG2881-T20A Users Guide 97 CHAPTER 11 Maintenance 11.1 Overview This chapter provides information on the Maintenance screens. 11.2 What You Can Do Use the General screen to set the timeout period of the management session (Section 11.3 on page 98). Use the Password screen to change your EMG2881-T20As system password (Section 11.4 on page 99). Use the Time screen to change your EMG2881-T20As time and date (Section 11.5 on page 100). Use the Firmware Upgrade screen to upload firmware to your EMG2881-T20A (Section 11.6 on page 101). Use the Backup/Restore screen to view information related to factory defaults, backup configuration, and restoring configuration (Section 11.8 on page 104). Use the Restart screen to reboot the EMG2881-T20A without turning the power off (Section 11.8 on page 104). Use the Log screen to see the logs for the activity on the EMG2881-T20A (Section 11.9 on page 104). Use the ROMD screen to save and/or clean the configuration to/from the ROMD file which can store customized default settings. 11.3 General Screen Use this screen to set the management session timeout period. Click Maintenance > General. The following screen displays. Figure 59 Maintenance > General EMG2881-T20A Users Guide 98 Chapter 11 Maintenance The following table describes the labels in this screen. Table 42 Maintenance > General LABEL System Name Domain Name Administrator Inactivity Timer DESCRIPTION System Name is a unique name to identify the EMG2881-T20A in an Ethernet network. Enter the domain name you want to give to the EMG2881-T20A. 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). Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to exit this screen without saving. Apply Cancel 11.4 Password Screen It is strongly recommended that you change your EMG2881-T20A's password. If you forget your EMG2881-T20A's password (or IP address), you will need to reset the device. See Section 11.8 on page 104 for details. Click Maintenance > Password. The screen appears as shown. Figure 60 Maintenance > Password The following table describes the labels in this screen. Table 43 Maintenance > Password DESCRIPTION LABEL This field displays the name of the admin account. User Type the default password or the existing password you use to access the system in this Old Password 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. Type the new password again in this field. Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to begin configuring this screen afresh. Retype to Confirm Apply Cancel New Password EMG2881-T20A Users Guide 99 Chapter 11 Maintenance 11.5 Time Screen Use this screen to configure the EMG2881-T20As time based on your local time zone. To change your EMG2881-T20As time and date, click Maintenance > Time. The screen appears as shown. Figure 61 Maintenance > Time The following table describes the labels in this screen. Table 44 Maintenance > Time LABEL DESCRIPTION Current Time and Date Current Time This field displays the time of your EMG2881-T20A. Current Date Each time you reload this page, the EMG2881-T20A synchronizes the time with the time server. This field displays the date of your EMG2881-T20A. Each time you reload this page, the EMG2881-T20A synchronizes the date with the time server. Time and Date Setup Manual New Time
(hh:mm:ss) New Date
(yyyy/mm/dd) Get from Time Server User Defined Time Server Address Time Zone Setup Time Zone 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. This field displays the last updated time from the time server or the last time configured manually. When you select Manual, enter the new time in this field and then click Apply. This field displays the last updated date from the time server or the last date configured manually. When you select Manual, enter the new date in this field and then click Apply. Select this radio button to have the EMG2881-T20A get the time and date from the time server you specified below. 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. Choose the time zone of your location. This will set the time difference between your time zone and Greenwich Mean Time (GMT). EMG2881-T20A Users Guide 100 Chapter 11 Maintenance Table 44 Maintenance > Time (continued) LABEL Daylight Savings Daylight saving is a period from late spring to early fall when many countries set their clocks DESCRIPTION ahead of normal local time by one hour to give more daytime light in the evening. Start Date Select this option if you use Daylight Saving Time. Configure the day and time when Daylight Saving Time starts if you selected Daylight Savings. The oclock 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 oclock 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 oclock field depends on your time zone. In Germany for instance, you would type 2 because Germanys time zone is one hour ahead of GMT or UTC (GMT+1). Configure the day and time when Daylight Saving Time ends if you selected Daylight Savings. The oclock 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 oclock 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 oclock field depends on your time zone. In Germany for instance, you would type 2 because Germanys time zone is one hour ahead of GMT or UTC (GMT + 1). Click Apply to save your changes back to the EMG2881-T20A. Click Cancel to exit this screen without saving. End Date Apply Cancel 11.6 Firmware Upgrade Screen Find firmware at www.zyxel.com in a file that (usually) uses the system model name with a *.bin extension, e.g., EMG2881-T20A.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 > Firmware Upgrade. Follow the instructions in this screen to upload firmware to your EMG2881-T20A. Figure 62 Maintenance > Firmware Upgrade EMG2881-T20A Users Guide 101 Chapter 11 Maintenance The following table describes the labels in this screen. DESCRIPTION Table 45 Maintenance > Firmware Upgrade LABEL Firmware Upgrade File Path Choose File Type in the location of the file you want to upload in this field or click Choose File to find it. Click Choose File to find the .bin file you want to upload. Remember that you must decompress compressed (.zip) files before you can upload them. Click Upload to begin the upload process. This process may take up to two minutes. Upload Do not turn off the EMG2881-T20A while firmware upload is in progress!
After you see the Firmware Upload In Process screen, wait two minutes before logging into the EMG2881-T20A again. The EMG2881-T20A automatically restarts in this time causing a temporary network disconnect. In some operating systems, you may see the following icon on your desktop. Figure 63 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, an error message appears. 11.7 Configuration Backup/Restore Screen Backup configuration allows you to back up (save) the EMG2881-T20As current configuration to a file on your computer. Once your EMG2881-T20A 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. Restore configuration allows you to upload a new or previously saved configuration file from your computer to your EMG2881-T20A. Click Maintenance > Backup/Restore. Information related to factory defaults, backup configuration, and restoring configuration appears as shown next. EMG2881-T20A Users Guide 102 Chapter 11 Maintenance Figure 64 Maintenance > Backup/Restore The following table describes the labels in this screen. DESCRIPTION Table 46 Maintenance > Backup/Restore LABEL Backup Configuration Backup Restore Configuration File Path Upload Click Backup to save the EMG2881-T20As current configuration to your computer. Click Choose File to browse to the location of the configuration file in your computer. Click Upload to begin the upload process. Note: Do not turn off the EMG2881-T20A while configuration file upload is in progress. After you see a configuration upload successful screen, you must then wait one minute before logging into the EMG2881-T20A again. The EMG2881-T20A automatically restarts in this time causing a temporary network disconnect. If you see an error screen, click Back to return to the Backup/Restore screen. Pressing the Reset button in this section clears all user-entered configuration information and returns the EMG2881-T20A to its factory defaults. You can also press the RESET button on the rear panel to reset the factory defaults of your EMG2881-T20A. Refer to the chapter about introducing the Web Configurator for more information on the RESET button. Reset Note: 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 EMG2881-T20A IP address (192.168.1.1). See Appendix B on page 121 for details on how to set up your computers IP address. EMG2881-T20A Users Guide 103 Chapter 11 Maintenance 11.8 Restart Screen System restart allows you to reboot the EMG2881-T20A without turning the power off. Click Maintenance > Restart to open the following screen. Figure 65 Maintenance > Restart Click Restart to have the EMG2881-T20A reboot. This does not affect the EMG2881-T20A's configuration. 11.9 Log Screen The Web Configurator allows you to look at all of the EMG2881-T20As logs in one location. You can configure which logs to display in the Log screen. Select the logs you wish to display. Click Apply to save your settings. Click Cancel to start the screen afresh. Use this screen to see the logged messages for the EMG2881-T20A. The log wraps around and deletes the old entries after it fills. Select what logs you want to see from the Display drop list. The log choices depend on your settings above this screen. Click Refresh to renew the log screen. Click Clear Log to delete all the logs. Figure 66 Maintenance > Log 11.10 The ROMD Screen Click Maintenance > ROMD to open the following screen. EMG2881-T20A Users Guide 104 Chapter 11 Maintenance Figure 67 Maintenance > ROMD Click Save to save the EMG2881-T20As current configuration to the ROM-D file. Click Clear to reset the customized settings in the ROM-D file to factory defaults. EMG2881-T20A Users Guide 105 CHAPTER 12 Troubleshooting 12.1 Overview 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 EMG2881-T20A Access and Login Internet Access Resetting the EMG2881-T20A to Its Factory Defaults Wireless Connections 12.2 Power, Hardware Connections, and LEDs The EMG2881-T20A does not turn on. None of the LEDs turn on. 1 Make sure you are using the power adaptor or cord included with the EMG2881-T20A. 2 Make sure the power adaptor or cord is connected to the EMG2881-T20A 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 EMG2881-T20A. 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 1.5 on page 12. 2 Check the hardware connections. See the Quick Start Guide. 3 Inspect your cables for damage. Contact the vendor to replace any damaged cables. 4 Disconnect and re-connect the power adaptor to the EMG2881-T20A. 5 If the problem continues, contact the vendor. EMG2881-T20A Users Guide 106 Chapter 12 Troubleshooting 12.3 EMG2881-T20A Access and Login I dont know the IP address of my EMG2881-T20A. 1 2 3 The default IP address of the EMG2881-T20A in Router Mode is 192.168.1.1. If you changed the IP address and have forgotten it, you might get the IP address of the EMG2881-T20A in Router Mode 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 EMG2881-T20A (it depends on the network), so enter this IP address in your Internet browser. Reset your EMG2881-T20A to change all settings back to their default. This means your current settings are lost. See Section 12.5 on page 109 in the Troubleshooting for information on resetting your EMG2881-
T20A. I forgot the password. 1 2 The default password is the factory default (see the device label). If this does not work, you have to reset the device to its factory defaults. See Section 12.5 on page 109. 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 of the EMG2881-T20A in Router Mode is 192.168.1.1. If you changed the IP address (Section 8.4 on page 71), 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 EMG2881-T20A. 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 A on page 112. 4 Make sure your computer is in the same subnet as the EMG2881-T20A. (If you know that there are routers between your computer and the EMG2881-T20A, skip this step.) If there is a DHCP server on your network, make sure your computer is using a dynamic IP address. See Section 8.4 on page 71. If there is no DHCP server on your network, make sure your computers IP address is in the same subnet as the EMG2881-T20A. See Section 8.4 on page 71. EMG2881-T20A Users Guide 107 Chapter 12 Troubleshooting 5 6 Reset the device to its factory defaults, and try to access the EMG2881-T20A with the default IP address. See Section 1.5.6 on page 14. If the problem continues, contact the network administrator or vendor, or try one of the advanced suggestions. Advanced Suggestions Try to access the EMG2881-T20A using another service, such as Telnet. If you can access the EMG2881-T20A, check the remote management settings and firewall rules to find out why the EMG2881-T20A does not respond to HTTP. 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 EMG2881-T20A. 1 Make sure you have entered the password correctly. The default password is the factory default (see the device label). 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 10 minutes. 3 Disconnect and re-connect the power adaptor or cord to the EMG2881-T20A. 4 If this does not work, you have to reset the device to its factory defaults. See Section 12.5 on page 109. 12.4 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 the WAN port is connected to a broadband modem or router with Internet access. Your computer and the EMG2881-T20A should be in the same subnet. 3 Make sure you entered your ISP account information correctly in the wizard or the WAN screen. These fields are case-sensitive, so make sure [Caps Lock] is not on. 4 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. 5 Disconnect all the cables from your device, and follow the directions in the Quick Start Guide again. 6 If the problem continues, contact your ISP. EMG2881-T20A Users Guide 108 Chapter 12 Troubleshooting I cannot access the Internet anymore. I had access to the Internet (with the EMG2881-T20A), but my Internet connection is not available anymore. 1 Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick Start Guide and Section 1.5 on page 12. 2 3 Reboot the EMG2881-T20A. If the problem continues, contact your ISP. The Internet connection is slow or intermittent. 1 There might be a lot of traffic on the network. Look at the LEDs, and check Section 1.5 on page 12. If the EMG2881-T20A is sending or receiving a lot of information, try closing some programs that use the Internet, especially peer-to-peer applications. 2 Check the signal strength. If the signal strength is low, try moving the EMG2881-T20A 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). 3 4 Reboot the EMG2881-T20A. 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. 12.5 Resetting the EMG2881-T20A to Its Factory Defaults If you reset the EMG2881-T20A, you lose all of the changes you have made. The EMG2881-T20A re-loads its default settings. You have to make all of your changes again. You will lose all of your changes when you push the RESET button. To reset the EMG2881-T20A:
1 Make sure the power LED is on. 2 Press the RESET button for one to four seconds to restart/reboot the EMG2881-T20A. EMG2881-T20A Users Guide 109 Chapter 12 Troubleshooting 3 Press the RESET button for longer than five seconds to set the EMG2881-T20A back to its factory-default configurations. If the EMG2881-T20A restarts automatically, wait for the EMG2881-T20A to finish restarting, and log in to the Web Configurator. The password is reset to the factory default (see the device label). If the EMG2881-T20A does not restart automatically, disconnect and reconnect the EMG2881-T20As power. Then, follow the directions above again. 12.6 Wireless Connections I cannot access the EMG2881-T20A or ping any computer from the WLAN. 1 Make sure the wireless LAN is enabled on the EMG2881-T20A. 2 Make sure the wireless adapter on your computer 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 EMG2881-T20A. 4 Make sure your computer (with a wireless adapter installed) is within the transmission range of the EMG2881-T20A. 5 Check that both the EMG2881-T20A and the wireless adapter on your computer 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 EMG2881-T20A. 7 Make sure you allow the EMG2881-T20A to be remotely accessed through the WLAN interface. Check your remote management settings. See the chapter on Wireless LAN in the Users Guide for more information. What factors may cause intermittent or unstabled wireless connection? How can I solve this problem?
The following factors may cause interference:
Obstacles: walls, ceilings, furniture, and so on. Building Materials: metal doors, aluminum studs. Electrical devices: microwaves, monitors, electric motors, cordless phones, and other wireless devices. To optimize the speed and quality of your wireless connection, you can:
Move your wireless device closer to the AP if the signal strength is low. EMG2881-T20A Users Guide 110 Chapter 12 Troubleshooting Reduce wireless interference that may be caused by other wireless networks or surrounding wireless electronics such as cordless phones. Place the AP where there are minimum obstacles (such as walls and ceilings) between the AP and the wireless client. Reduce the number of wireless clients connecting to the same AP simultaneously, or add additional APs if necessary. Try closing some programs that use the Internet, especially peer-to-peer applications. If the wireless client is sending or receiving a lot of information, it may have too many programs open that use the Internet. Position the antennas for best reception. If the AP is placed on a table or floor, point the antennas upwards. If the AP is placed at a high position, point the antennas downwards. Try pointing the antennas in different directions and check which provides the strongest signal to the wireless clients. EMG2881-T20A Users Guide 111 APPENDIX A Pop-up Windows, JavaScript and Java Permissions In order to use the web configurator you need to allow:
Web browser pop-up windows from your device. JavaScript (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 In Internet Explorer, select Tools, Pop-up Blocker and then select Turn Off Pop-up Blocker. Figure 68 Pop-up Blocker You can also check if pop-up blocking is disabled in the Pop-up Blocker section in the Privacy tab. 1 In Internet Explorer, select Tools, Internet Options, Privacy. 2 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. EMG2881-T20A Users Guide 112 Appendix A Pop-up Windows, JavaScript and Java Permissions Figure 69 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. EMG2881-T20A Users Guide 113 Appendix A Pop-up Windows, JavaScript and Java Permissions Figure 70 Internet Options: Privacy 3 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. 4 Click Add to move the IP address to the list of Allowed sites. Figure 71 Pop-up Blocker Settings EMG2881-T20A Users Guide 114 Appendix A Pop-up Windows, JavaScript and Java Permissions 5 Click Close to return to the Privacy screen. 6 Click Apply to save this setting. JavaScript If pages of the web configurator do not display properly in Internet Explorer, check that JavaScript are allowed. 1 In Internet Explorer, click Tools, Internet Options and then the Security tab. Figure 72 Internet Options: Security 2 Click the Custom Level... button. 3 4 5 Scroll down to Scripting. Under Active scripting make sure that Enable is selected (the default). Under Scripting of Java applets make sure that Enable is selected (the default). 6 Click OK to close the window. EMG2881-T20A Users Guide 115 Appendix A Pop-up Windows, JavaScript and Java Permissions Figure 73 Security Settings - Java Scripting Java Permissions 1 From Internet Explorer, click Tools, Internet Options and then the Security tab. 2 Click the Custom Level... button. 3 4 Scroll down to Microsoft VM. Under Java permissions make sure that a safety level is selected. 5 Click OK to close the window. EMG2881-T20A Users Guide 116 Appendix A Pop-up Windows, JavaScript and Java Permissions Figure 74 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 75 Java (Sun) EMG2881-T20A Users Guide 117 Appendix A Pop-up Windows, JavaScript 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, Javascript and pop-ups in one screen. Click Tools, then click Options in the screen that appears. Figure 76 Mozilla Firefox: TOOLS > Options Click Content to show the screen below. Select the check boxes as shown in the following screen. Figure 77 Mozilla Firefox Content Security EMG2881-T20A Users Guide 118 Appendix A Pop-up Windows, JavaScript 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 78 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. EMG2881-T20A Users Guide 119 Appendix A Pop-up Windows, JavaScript and Java Permissions Figure 79 Opera: Enabling Java To customize JavaScript behavior in the Opera browser, click JavaScript Options. Figure 80 Opera: JavaScript Options Select the items you want Operas JavaScript to apply. EMG2881-T20A Users Guide 120 APPENDIX B Setting Up Your Computers IP Address Note: Your specific EMG2881-T20A 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 121 Windows Vista on page 124 Windows 7 on page 127 Mac OS X: 10.3 and 10.4 on page 132 Mac OS X: 10.5 and 10.6 on page 135 Linux: Ubuntu 8 (GNOME) on page 138 Linux: openSUSE 10.3 (KDE) on page 142 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. EMG2881-T20A Users Guide 121 Appendix B 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. EMG2881-T20A Users Guide 122 Appendix B Setting Up Your Computers IP Address 5 The Internet Protocol TCP/IP Properties window opens. EMG2881-T20A Users Guide 123 Appendix B Setting Up Your Computers IP Address 6 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. 7 Click OK to close the Internet Protocol (TCP/IP) Properties window. 8 Click OK to close the Local Area Connection Properties window. Verifying Settings 1 Click Start > All Programs > Accessories > Command Prompt. 2 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. Windows Vista This section shows screens from Windows Vista Professional. EMG2881-T20A Users Guide 124 Appendix B Setting Up Your Computers IP Address 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. 5 Right-click Local Area Connection and then select Properties. EMG2881-T20A Users Guide 125 Appendix B 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. 6 Select Internet Protocol Version 4 (TCP/IPv4) and then select Properties. 7 The Internet Protocol Version 4 (TCP/IPv4) Properties window opens. EMG2881-T20A Users Guide 126 Appendix B Setting Up Your Computers IP Address 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 Advanced. 9 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 Click Start > All Programs > Accessories > Command Prompt. 2 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. Windows 7 This section shows screens from Windows 7 Enterprise. EMG2881-T20A Users Guide 127 Appendix B Setting Up Your Computers IP Address 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. EMG2881-T20A Users Guide 128 Appendix B 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. EMG2881-T20A Users Guide 129 Appendix B Setting Up Your Computers IP Address 6 The Internet Protocol Version 4 (TCP/IPv4) Properties window opens. EMG2881-T20A Users Guide 130 Appendix B Setting Up Your Computers IP Address 7 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. 8 Click OK to close the Internet Protocol (TCP/IP) Properties window. 9 Click OK to close the Local Area Connection Properties window. Verifying Settings 1 Click Start > All Programs > Accessories > Command Prompt. 2 3 In the Command Prompt window, type "ipconfig" and then press [ENTER]. The IP settings are displayed as follows. EMG2881-T20A Users Guide 131 Appendix B 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. EMG2881-T20A Users Guide 132 Appendix B 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. EMG2881-T20A Users Guide 133 Appendix B 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. EMG2881-T20A Users Guide 134 Appendix B Setting Up Your Computers IP Address Figure 81 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. EMG2881-T20A Users Guide 135 Appendix B Setting Up Your Computers IP Address 3 When the Network preferences pane opens, select Ethernet from the list of available connection types. 4 From the Configure list, select Using DHCP for dynamically assigned settings. EMG2881-T20A Users Guide 136 Appendix B Setting Up Your Computers IP Address 5 For statically assigned settings, do the following:
From the Configure list, select Manually. 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 EMG2881-T20A. 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. EMG2881-T20A Users Guide 137 Appendix B Setting Up Your Computers IP Address Figure 82 Mac OS X 10.5: Network Utility 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. EMG2881-T20A Users Guide 138 Appendix B 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. EMG2881-T20A Users Guide 139 Appendix B 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 Click OK to save the changes and close the Properties dialog box and return to the Network Settings screen. 7 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. EMG2881-T20A Users Guide 140 Appendix B 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. EMG2881-T20A Users Guide 141 Appendix B Setting Up Your Computers IP Address Figure 83 Ubuntu 8: Network Tools 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). EMG2881-T20A Users Guide 142 Appendix B 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. EMG2881-T20A Users Guide 143 Appendix B 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 EMG2881-T20A Users Guide 144 Appendix B Setting Up Your Computers IP Address Figure 84 openSUSE 10.3: Network Card Setup 6 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. 7 Click Next to save the changes and close the Network Card Setup window. 8 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. EMG2881-T20A Users Guide 145 Appendix B 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 85 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. EMG2881-T20A Users Guide 146 Appendix B Setting Up Your Computers IP Address Figure 86 openSUSE: Connection Status - KNetwork Manager EMG2881-T20A Users Guide 147 APPENDIX C 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 47 Commonly Used Services NAME AH (IPSEC_TUNNEL) PROTOCOL User-Defined PORT(S) 51 AIM/New-ICQ AUTH BGP BOOTP_CLIENT BOOTP_SERVER CU-SEEME DNS TCP TCP TCP UDP UDP TCP UDP TCP/UDP ESP (IPSEC_TUNNEL) User-Defined FINGER FTP H.323 HTTP HTTPS TCP TCP TCP TCP TCP TCP 5190 113 179 68 67 7648 24032 53 50 79 20 21 1720 80 443 DESCRIPTION The IPSEC AH (Authentication Header) tunneling protocol uses this service. 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. HTTPS is a secured http session often used in e-
commerce. EMG2881-T20A Users Guide 148 Appendix C Common Services Table 47 Commonly Used Services (continued) NAME ICMP PROTOCOL User-Defined PORT(S) 1 ICQ IGMP (MULTICAST) UDP User-Defined IKE IRC MSN Messenger UDP TCP/UDP TCP NEW-ICQ NEWS NFS NNTP PING POP3 PPTP TCP TCP UDP TCP User-Defined TCP TCP 4000 2 500 6667 1863 5190 144 2049 119 1 110 1723 PPTP_TUNNEL (GRE) User-Defined 47 RCMD REAL_AUDIO REXEC RLOGIN RTELNET RTSP SFTP SMTP SNMP SNMP-TRAPS SQL-NET TCP TCP TCP TCP TCP TCP/UDP TCP TCP TCP/UDP TCP/UDP TCP 512 7070 514 513 107 554 115 25 161 162 1521 DESCRIPTION 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). 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. EMG2881-T20A Users Guide 149 Appendix C Common Services Table 47 Commonly Used Services (continued) NAME SSH STRM WORKS SYSLOG TACACS PROTOCOL TCP/UDP UDP UDP UDP PORT(S) 22 1558 514 49 TELNET TFTP VDOLIVE TCP UDP TCP 23 69 7000 DESCRIPTION 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). Another videoconferencing solution. EMG2881-T20A Users Guide 150 APPENDIX D Customer Support In the event of problems that cannot be solved by using this manual, you should contact your vendor. If you cannot contact your vendor, then contact a Zyxel office for the region in which you bought the device. See http://www.zyxel.com/homepage.shtml and also http://www.zyxel.com/about_zyxel/zyxel_worldwide.shtml for the latest information. Please have the following information ready when you contact an office. Required Information Product model and serial number. Warranty Information. Date that you received your device. Brief description of the problem and the steps you took to solve it. Corporate Headquarters (Worldwide) Taiwan Zyxel Communications Corporation http://www.zyxel.com Asia China Zyxel Communications (Shanghai) Corp. Zyxel Communications (Beijing) Corp. Zyxel Communications (Tianjin) Corp. http://www.zyxel.cn India Zyxel Technology India Pvt Ltd http://www.zyxel.in Kazakhstan Zyxel Kazakhstan http://www.zyxel.kz EMG2881-T20A Users Guide 151 Appendix D Customer Support Korea Zyxel Korea Corp. http://www.zyxel.kr Malaysia Zyxel Malaysia Sdn Bhd. http://www.zyxel.com.my Pakistan Zyxel Pakistan (Pvt.) Ltd. http://www.zyxel.com.pk Philippines Zyxel Philippines http://www.zyxel.com.ph Singapore Zyxel Singapore Pte Ltd. http://www.zyxel.com.sg Taiwan Zyxel Communications Corporation http://www.zyxel.com/tw/zh/
Thailand Zyxel Thailand Co., Ltd http://www.zyxel.co.th Vietnam Zyxel Communications Corporation-Vietnam Office http://www.zyxel.com/vn/vi Europe Austria Zyxel Deutschland GmbH http://www.zyxel.de Belarus Zyxel BY http://www.zyxel.by EMG2881-T20A Users Guide 152 Appendix D Customer Support Belgium Zyxel Communications B.V. http://www.zyxel.com/be/nl/
http://www.zyxel.com/be/fr/
Bulgaria Zyxel http://www.zyxel.com/bg/bg/
Czech Republic Zyxel Communications Czech s.r.o http://www.zyxel.cz Denmark Zyxel Communications A/S http://www.zyxel.dk Estonia Zyxel Estonia http://www.zyxel.com/ee/et/
Finland Zyxel Communications http://www.zyxel.fi France Zyxel France http://www.zyxel.fr Germany Zyxel Deutschland GmbH http://www.zyxel.de Hungary Zyxel Hungary & SEE http://www.zyxel.hu Italy Zyxel Communications Italy http://www.zyxel.it/
EMG2881-T20A Users Guide 153 Appendix D Customer Support Latvia Zyxel Latvia http://www.zyxel.com/lv/lv/homepage.shtml Lithuania Zyxel Lithuania http://www.zyxel.com/lt/lt/homepage.shtml Netherlands Zyxel Benelux http://www.zyxel.nl Norway Zyxel Communications http://www.zyxel.no Poland Zyxel Communications Poland http://www.zyxel.pl Romania Zyxel Romania http://www.zyxel.com/ro/ro Russia Zyxel Russia http://www.zyxel.ru Slovakia Zyxel Communications Czech s.r.o. organizacna zlozka http://www.zyxel.sk Spain Zyxel Communications ES Ltd http://www.zyxel.es Sweden Zyxel Communications http://www.zyxel.se Switzerland Studerus AG EMG2881-T20A Users Guide 154 Appendix D Customer Support http://www.zyxel.ch/
Turkey Zyxel Turkey A.S. http://www.zyxel.com.tr UK Zyxel Communications UK Ltd. http://www.zyxel.co.uk Ukraine Zyxel Ukraine http://www.ua.zyxel.com Latin America Argentina Zyxel Communication Corporation http://www.zyxel.com/ec/es/
Brazil Zyxel Communications Brasil Ltda. https://www.zyxel.com/br/pt/
Ecuador Zyxel Communication Corporation http://www.zyxel.com/ec/es/
Middle East Israel Zyxel Communication Corporation http://il.zyxel.com/homepage.shtml Middle East Zyxel Communication Corporation http://www.zyxel.com/me/en/
EMG2881-T20A Users Guide 155 Appendix D Customer Support North America USA Zyxel Communications, Inc. - North America Headquarters http://www.zyxel.com/us/en/
Oceania Africa Australia Zyxel Communications Corporation http://www.zyxel.com/au/en/
South Africa Nology (Pty) Ltd. http://www.zyxel.co.za EMG2881-T20A Users Guide 156 APPENDIX E Legal Information Copyright Disclaimer Copyright 2018 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. 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. Regulatory Notice and Statement UNITED STATES of AMERICA The following information applies if you use the product within USA area. FCC EMC Statement The device complies with Part 15 of FCC rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the device. This product has been tested and complies with the specifications 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 according to 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 or television reception, which is found 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 devices Connect the equipment to an outlet other than the receivers Consult a dealer or an experienced radio/TV technician for assistance The following information applies if you use the product with RF function within USA area. FCC Radiation Exposure Statement This device complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This transmitter must be at least 23 cm from the user and must not be co-located or operating in conjunction with any other antenna or Operation of this device is restricted to indoor use only, except for relevant user's manual mention that this device can be installed into the transmitter. external environment. CANADA The following information applies if you use the product within Canada area. Industry Canada ICES Statement CAN ICES-3 (B)/NMB-3(B) EMG2881-T20A Users Guide 157 Appendix E Legal Information Industry Canada RSS-GEN & RSS-247 statement This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. This radio transmitter (2468C-EMG2881T20A) has been approved by Industry Canada to operate with the antenna types listed below with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Antenna Information TYPE PCB MANUFACTURER GAIN CINGXIN PCB CINGXIN 2.97 dBi (2.4~2.4835GHz) 2.99 dBi (5.15~5.85GHz) 2.75 dBi (2.4~2.4835GHz) 2.97 dBi (5.15~5.85GHz) CONNECTOR i-pex(MHF) i-pex(MHF) If the product with 5G wireless function operating in 5150-5250 MHz and 5725-5850 MHz, the following attention must be paid, The device for operation in the band 5150-5250 MHz is only for indoor use to reduce the potential for harmful interference to co-channel For devices with detachable antenna(s), the maximum antenna gain permitted for devices in the band 5725-5850 MHz shall be such that the equipment still complies with the e.i.r.p. limits specified for point-to-point and non-point-to-point operation as appropriate; and The worst-case tilt angle(s) necessary to remain compliant with the e.i.r.p. elevation mask requirement set forth in Section 6.2.2(3) of RSS 247 mobile satellite systems. shall be clearly indicated. If the product with 5G wireless function operating in 5250-5350 MHz and 5470-5725 MHz , the following attention must be paid. For devices with detachable antenna(s), the maximum antenna gain permitted for devices in the bands 5250-5350 MHz and 5470-5725 MHz shall be such that the equipment still complies with the e.i.r.p. limit. Le prsent appareil est conforme aux CNR dIndustrie Canada applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes : (1) lappareil ne doit pas produire de brouillage, et (2) lutilisateur de lappareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible den compromettre le fonctionnement. Le prsent metteur radio (2468C-EMG2881T20A) de modle s'il fait partie du matriel de catgorieI) a t approuv par Industrie Canada pour fonctionner avec les types d'antenne numrs ci-dessous et ayant un gain admissible maximal et l'impdance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est suprieur au gain maximal indiqu, sont strictement interdits pour l'exploitation de l'metteur. Informations Antenne TYPE PCB FABRICANT GAIN CINGXIN PCB CINGXIN 2.97 dBi (2.4~2.4835GHz) 2.99 dBi (5.15~5.85GHz) 2.75 dBi (2.4~2.4835GHz) 2.97 dBi (5.15~5.85GHz) CONNECTEUR i-pex(MHF) i-pex(MHF) Lorsque la fonction sans fil 5G fonctionnant en 5150-5250 MHz and 5725-5850 MHz est active pour ce produit , il est ncessaire de porter une attention particulire aux choses suivantes Les dispositifs fonctionnant dans la bande 5150-5250 MHz sont rservs uniquement pour une utilisation lintrieur afin de rduire les risques de brouillage prjudiciable aux systmes de satellites mobiles utilisant les mmes canaux;
Pour les dispositifs munis dantennes amovibles, le gain maximal d'antenne permis (pour les dispositifs utilisant la bande de 5 725 5 850 MHz) doit tre conforme la limite de la p.i.r.e. spcifie pour l'exploitation point point et lexploitation non point point, selon le cas;
Les pires angles dinclinaison ncessaires pour rester conforme lexigence de la p.i.r.e. applicable au masque dlvation, et nonce la section 6.2.2 3) du CNR-247, doivent tre clairement indiqus. Lorsque la fonction sans fil 5G fonctionnant en 5250-5350 MHz et 5470-5725 MHz est active pour ce produit , il est ncessaire de porter une attention particulire aux choses suivantes. Pour les dispositifs munis dantennes amovibles, le gain maximal d'antenne permis pour les dispositifs utilisant les bandes de 5 250 5 350 MHz et de 5 470 5 725 MHz doit tre conforme la limite de la p.i.r.e. Industry Canada radiation exposure statement This device complies with IC radiation exposure limits set forth for an uncontrolled environment. This device should be installed and operated with a minimum distance of 25 cm between the radiator and your body. Dclaration dexposition aux radiations:
Cet quipement est conforme aux limites dexposition aux rayonnements IC tablies pour un environnement non contrl. Cet quipement doit tre install et utilis avec un minimum de 25 cm de distance entre la source de rayonnement et votre corps. EMG2881-T20A Users Guide 158 Appendix E Legal Information EUROPEAN UNION The following information applies if you use the product within the European Union. Declaration of Conformity with Regard to EU Directive 2014/53/EU (Radio Equipment Directive, RED) Compliance information for 2.4GHz and/or 5GHz wireless products relevant to the EU and other Countries following the EU Directive 2014/53/
EU (RED). And this product may be used in all EU countries (and other countries following the EU Directive 2014/53/EU) without any limitation except for the countries mentioned below table:
In the majority of the EU and other European countries, the 5GHz 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 in which 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 the 5GHz wireless LANs. If this device for operation in the band 5150-5350 MHz, it is for indoor use only. This equipment should be installed and operated with a minimum distance of 20cm between the radio equipment and your body.
(Bulgarian) Espaol
(Spanish) etina
(Czech) Dansk (Danish) Deutsch
(German) Eesti keel
(Estonian)
(Greek) English Franais
(French) Hrvatski
(Croatian) slenska
(Icelandic) Zyxel , 2014/53/C. National Restrictions 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. 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 2014/53/UE.. Zyxel tmto prohlauje, e tento zazen je ve shod se zkladnmi poadavky a dalmi pslunmi ustanovenmi smrnice 2014/53/EU. Undertegnede Zyxel erklrer herved, at flgende udstyr udstyr overholder de vsentlige krav og vrige relevante krav i direktiv 2014/53/EU. National Restrictions In Denmark, the band 5150 - 5350 MHz is also allowed for outdoor usage. I Danmark m frekvensbndet 5150 - 5350 ogs anvendes udendrs. Hiermit erklrt Zyxel, dass sich das Gert Ausstattung in bereinstimmung mit den grundlegenden Anforderungen und den brigen einschlgigen Bestimmungen der Richtlinie 2014/53/EU befindet. Kesolevaga kinnitab Zyxel seadme seadmed vastavust direktiivi 2014/53/EL phinuetele ja nimetatud direktiivist tulenevatele teistele asjakohastele stetele. Zyxel 2014/53/EE. Hereby, Zyxel declares that this device is in compliance with the essential requirements and other relevant provisions of Directive 2014/53/EU. Par la prsente Zyxel dclare que l'appareil quipements est conforme aux exigences essentielles et aux autres dispositions pertinentes de la directive 2014/53/UE. Zyxel ovime izjavljuje da je radijska oprema tipa u skladu s Direktivom 2014/53/UE. Hr me lsir, Zyxel v yfir a essi bnaur er samrmi vi grunnkrfur og nnur vieigandi kvi tilskipunar 2014/53/
UE. Italiano (Italian) Con la presente Zyxel dichiara che questo attrezzatura conforme ai requisiti essenziali ed alle altre disposizioni pertinenti stabilite dalla direttiva 2014/53/UE. National Restrictions 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. EMG2881-T20A Users Guide 159 Appendix E Legal Information Latvieu valoda
(Latvian) Lietuvi kalba
(Lithuanian) Magyar
(Hungarian) Malti (Maltese) Nederlands
(Dutch) Polski (Polish) Portugus
(Portuguese) Romn
(Romanian) Slovenina
(Slovak) Slovenina
(Slovene) Ar o Zyxel deklar, ka iekrtas atbilst Direktvas 2014/53/ES btiskajm prasbm un citiem ar to saisttajiem noteikumiem. National Restrictions The outdoor usage of the 2.4 GHz band requires an authorization from the Electronic Communications Office. Please 2.4 GHz frekvenu joslas izmantoanai rpus telpm nepiecieama atauja no Elektronisko sakaru direkcijas. Vairk check http://www.esd.lv for more details. informcijas: http://www.esd.lv. iuo Zyxel deklaruoja, kad is ranga atitinka esminius reikalavimus ir kitas 2014/53/ES Direktyvos nuostatas. Alulrott, Zyxel nyilatkozom, hogy a berendezs megfelel a vonatkoz alapvet kvetelmnyeknek s az 2014/53/EU irnyelv egyb elrsainak. Hawnhekk, Zyxel, jiddikjara li dan tagmir jikkonforma mal-tiijiet essenzjali u ma provvedimenti orajn relevanti li hemm fid-Dirrettiva 2014/53/UE. Hierbij verklaart Zyxel dat het toestel uitrusting in overeenstemming is met de essentile eisen en de andere relevante bepalingen van richtlijn 2014/53/EU. Niniejszym Zyxel owiadcza, e sprzt jest zgodny z zasadniczymi wymogami oraz pozostaymi stosownymi postanowieniami Dyrektywy 2014/53/UE. Zyxel declara que este equipamento est conforme com os requisitos essenciais e outras disposies da Directiva 2014/53/
UE. Prin prezenta, Zyxel declar c acest echipament este n conformitate cu cerinele eseniale i alte prevederi relevante ale Directivei 2014/53/UE. Zyxel tmto vyhlasuje, e zariadenia spa zkladn poiadavky a vetky prslun ustanovenia Smernice 2014/53/E. Zyxel izjavlja, da je ta oprema v skladu z bistvenimi zahtevami in ostalimi relevantnimi doloili direktive 2014/53/EU. Suomi (Finnish) Zyxel vakuuttaa tten ett laitteet tyyppinen laite on direktiivin 2014/53/EU oleellisten vaatimusten ja sit koskevien direktiivin muiden ehtojen mukainen. Svenska
(Swedish) Hrmed intygar Zyxel att denna utrustning str I verensstmmelse med de vsentliga egenskapskrav och vriga relevanta bestmmelser som framgr av direktiv 2014/53/EU. Norsk
(Norwegian) Erklrer herved Zyxel at dette utstyret er I samsvar med de grunnleggende kravene og andre relevante bestemmelser I direktiv 2014/53/EU. Notes:
Although Norway, Switzerland and Liechtenstein are not EU member states, the EU Directive 2014/53/EU has also been implemented in those 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). countries. EMG2881-T20A Users Guide 160 Appendix E Legal Information List of national codes COUNTRY ISO 3166 2 LETTER CODE COUNTRY ISO 3166 2 LETTER CODE Austria Belgium Bulgaria Croatia Cyprus Czech Republic Denmark Estonia Finland France Germany Greece Hungary Iceland Ireland Italy Latvia AT BE BG HR CY CZ DK EE FI FR DE GR HU IS IE IT LV Safety Warnings Liechtenstein Lithuania Luxembourg Malta Netherlands Norway Poland Portugal Romania Serbia Slovakia Slovenia Spain Switzerland Sweden Turkey United Kingdom LI LT LU MT NL NO PL PT RO RS SK SI ES CH SE TR GB 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 obstruct the device ventilation slots as insufficient airflow may harm your device. For example, do not place the device in an enclosed space such as a box or on a very soft surface such as a bed or sofa. 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. Do not remove the plug and connect it to a power outlet by itself; always attach the plug to the power adaptor first before connecting it to 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 a power outlet. or cord. Please use the provided or designated connection cables/power cables/ adaptors. Connect it to the right supply voltage (for example, 110V AC in North America or 230V AC in Europe). If the power adaptor or cord is damaged, it might cause electrocution. Remove it from the device and the power source, repairing the power adapter or cord is prohibited. 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. CAUTION: Risk of explosion if battery is replaced by an incorrect type, dispose of used batteries according to the instruction. Dispose them at the applicable collection point for the recycling of electrical and electronic devices. For detailed information about recycling of this product, please contact your local city office, your household waste disposal service or the store where you purchased the product. The following warning statements apply, where the disconnect device is not incorporated in the device or where the plug on the power supply cord is intended to serve as the disconnect device,
- For permanently connected devices, a readily accessible disconnect device shall be incorporated external to the device;
- For pluggable devices, the socket-outlet shall be installed near the device and shall be easily accessible. Environment Statement ErP (Energy-related Products) Zyxel products put on the EU market in compliance with the requirement of the European Parliament and the Council published Directive 2009/
125/EC establishing a framework for the setting of ecodesign requirements for energy-related products (recast), so called as "ErP Directive
(Energy-related Products directive) as well as ecodesign requirement laid down in applicable implementing measures, power consumption has satisfied regulation requirements which are:
Network standby power consumption < 8W, and/or Off mode power consumption < 0.5W, and/or Standby mode power consumption < 0.5W.
(Wireless setting, please refer to "Wireless" chapter for more detail.) European Union - Disposal and Recycling Information The symbol below means that according to local regulations your product and/or its battery shall be disposed of separately from domestic waste. If this product is end of life, take it to a recycling station designated by local authorities. At the time of disposal, the separate collection of your product and/or its battery will help save natural resources and ensure that the environment is sustainable development. EMG2881-T20A Users Guide 161 Appendix E Legal Information Die folgende Symbol bedeutet, dass Ihr Produkt und/oder seine Batterie gem den rtlichen Bestimmungen getrennt vom Hausmll entsorgt werden muss. Wenden Sie sich an eine Recyclingstation, wenn dieses Produkt das Ende seiner Lebensdauer erreicht hat. Zum Zeitpunkt der Entsorgung wird die getrennte Sammlung von Produkt und/oder seiner Batterie dazu beitragen, natrliche Ressourcen zu sparen und die Umwelt und die menschliche Gesundheit zu schtzen. El smbolo de abajo indica que segn las regulaciones locales, su producto y/o su batera debern depositarse como basura separada de la domstica. Cuando este producto alcance el final de su vida til, llvelo a un punto limpio. Cuando llegue el momento de desechar el producto, la recogida por separado ste y/o su batera ayudar a salvar los recursos naturales y a proteger la salud humana y medioambiental. Le symbole ci-dessous signifie que selon les rglementations locales votre produit et/ou sa batterie doivent tre limins sparment des ordures mnagres. Lorsque ce produit atteint sa fin de vie, amenez-le un centre de recyclage. Au moment de la mise au rebut, la collecte spare de votre produit et/ou de sa batterie aidera conomiser les ressources naturelles et protger l'environnement et la sant humaine. Il simbolo sotto significa che secondo i regolamenti locali il vostro prodotto e/o batteria deve essere smaltito separatamente dai rifiuti domestici. Quando questo prodotto raggiunge la fine della vita di servizio portarlo a una stazione di riciclaggio. Al momento dello smaltimento, la raccolta separata del vostro prodotto e/o della sua batteria aiuta a risparmiare risorse naturali e a proteggere l'ambiente e la salute umana. Symbolen innebr att enligt lokal lagstiftning ska produkten och/eller dess batteri kastas separat frn hushllsavfallet. Nr den hr produkten nr slutet av sin livslngd ska du ta den till en tervinningsstation. Vid tiden fr kasseringen bidrar du till en bttre milj och mnsklig hlsa genom att gra dig av med den p ett tervinningsstlle.
- :
:
- -
- -
( : / 110V AC 230V AC) EMG2881-T20A Users Guide 162 Appendix E Legal Information
:
-
-
About the Symbols Various symbols are used in this product to ensure correct usage, to prevent danger to the user and others, and to prevent property damage. The meaning of these symbols are described below. It is important that you read these descriptions thoroughly and fully understand the contents. Explanation of the Symbols SYMBOL EXPLANATION Alternating current (AC):
AC is an electric current in which the flow of electric charge periodically reverses direction. Direct current (DC):
DC if the unidirectional flow or movement of electric charge carriers. Earth; ground:
A wiring terminal intended for connection of a Protective Earthing Conductor. Class II equipment:
The method of protection against electric shock in the case of class II equipment is either double insulation or reinforced insulation. 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 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. EMG2881-T20A Users Guide 163 Index Index DiffServ 84 marking rule 84 disclaimer 157 DNS Server 38 Domain Name System. See DNS. DS field 84 DS, dee differentiated services DSCP 84 DynDNS 95 DynDNS see also DDNS 95 E encryption 55 and local (user) database 56 key 56 WPA compatible 56 ESSID 110 F Firewall guidelines 93 ICMP packets 95 firewall stateful inspection 92 Firmware upload 101 file extension using HTTP firmware version 19 A Address Assignment 38 AP 10 AP Mode menu 23 AP+Bridge 10 B Bridge/Repeater 10 C certifications 161 viewing 163 Channel 20 channel 54 Configuration restore 103 contact information 151 copyright 157 CoS 84 CoS technologies 76 CPU usage 20 customer support 151 D DDNS service providers 95 DHCP 35 DHCP server see also Dynamic Host Configuration Protocol DHCP server 71 Differentiated Services, see DiffServ 84 G General wireless LAN screen 57 Guest WLAN 56 Guest WLAN Bandwidth 56 EMG2881-T20A Users Guide 164 I IGMP 39 see also Internet Group Multicast Protocol version IGMP version 39 Internet Group Multicast Protocol 39 IP Address 71 L LAN 70 LAN overview 70 LAN setup 70 Language 104 Link type 20 local (user) database 55 and encryption 56 Local Area Network 70 M MAC 64 MAC address 38, 54 cloning 38 MAC address filter 54 MAC address filtering 64 MAC filter 64 managing the device good habits 11 using the web configurator. See web configurator. using the WPS. See WPS. MBSSID 10 Media access control 64 Memory usage 20 mode 10 Multicast 39 IGMP 39 Index N NAT Traversal 77 Navigation Panel 21 navigation panel 21 O operating mode 10 P Per-Hop Behavior, see PHB 84 PHB 84 Point-to-Point Protocol over Ethernet 40 port speed 21 PPPoE 40 dial-up connection push button 14 Q QoS 75, 84 marking 76 setup 75 tagging 76 versus CoS 76 Quality of Service, see QoS R RADIUS server 55 Reset button 14 Reset the device 14 Restore configuration 103 Roaming 65 Router Mode status screen 18 RTS/CTS Threshold 54, 65 EMG2881-T20A Users Guide 165 Index WAN MAC address 38 warranty 163 note 163 Web Configurator how to access 16 Overview 16 web configurator 11 WEP Encryption 61 wireless channel 110 wireless LAN 110 WPS push button 14 wireless LAN scheduling 68 Wireless network basic guidelines 54 channel 54 encryption 55 example 53 MAC address filter 54 overview 53 security 54 SSID 54 Wireless security 54 overview 54 type 54 wireless security 110 Wireless tutorial 24 WPA compatible 56 WPS 11 push button 14 S Scheduling 68 Service Set 58, 63 Service Set IDentification 58, 63 Service Set IDentity. See SSID. Single Rate Three Color Marker, see srTCM srTCM 86 SSID 20, 54, 58, 63 stateful inspection firewall 92 Status 18 Subnet Mask 71 Summary DHCP table 35 System General Setup 98 System restart 104 T Time setting 100 trTCM 86 Two Rate Three Color Marker, see trTCM U Universal Plug and Play Application 77 Security issues 77 user authentication 55 local (user) database 55 RADIUS server 55 V VPN Passthrough 49 W WAN (Wide Area Network) 37 EMG2881-T20A Users Guide 166
frequency | equipment class | purpose | ||
---|---|---|---|---|
1 | 2018-01-30 | 5745 ~ 5825 | NII - Unlicensed National Information Infrastructure TX | Original Equipment |
2 | 2412 ~ 2462 | DTS - Digital Transmission System |
app s | Applicant Information | |||||
---|---|---|---|---|---|---|
1 2 | Effective |
2018-01-30
|
||||
1 2 | Applicant's complete, legal business name |
ZyXEL Communications Corporation
|
||||
1 2 | FCC Registration Number (FRN) |
0021059092
|
||||
1 2 | Physical Address |
No.2, Industry East Road IX, Science Park
|
||||
1 2 |
Hsinchu, N/A
|
|||||
1 2 |
Taiwan
|
|||||
app s | TCB Information | |||||
1 2 | TCB Application Email Address |
t******@us.bureauveritas.com
|
||||
1 2 | TCB Scope |
A4: UNII devices & low power transmitters using spread spectrum techniques
|
||||
app s | FCC ID | |||||
1 2 | Grantee Code |
I88
|
||||
1 2 | Equipment Product Code |
EMG2881-T20A
|
||||
app s | Person at the applicant's address to receive grant or for contact | |||||
1 2 | Name |
E****** B******
|
||||
1 2 | Title |
Section Manager
|
||||
1 2 | Telephone Number |
886 3******** Extension:
|
||||
1 2 | Fax Number |
886 3********
|
||||
1 2 |
E******@zyxel.com.tw
|
|||||
app s | Technical Contact | |||||
n/a | ||||||
app s | Non Technical Contact | |||||
n/a | ||||||
app s | Confidentiality (long or short term) | |||||
1 2 | Does this application include a request for confidentiality for any portion(s) of the data contained in this application pursuant to 47 CFR § 0.459 of the Commission Rules?: | Yes | ||||
1 2 | Long-Term Confidentiality Does this application include a request for confidentiality for any portion(s) of the data contained in this application pursuant to 47 CFR § 0.459 of the Commission Rules?: | Yes | ||||
1 2 | If so, specify the short-term confidentiality release date (MM/DD/YYYY format) | 07/29/2018 | ||||
if no date is supplied, the release date will be set to 45 calendar days past the date of grant. | ||||||
app s | Cognitive Radio & Software Defined Radio, Class, etc | |||||
1 2 | Is this application for software defined/cognitive radio authorization? | No | ||||
1 2 | Equipment Class | NII - Unlicensed National Information Infrastructure TX | ||||
1 2 | DTS - Digital Transmission System | |||||
1 2 | Description of product as it is marketed: (NOTE: This text will appear below the equipment class on the grant) | Dual-Band Wireless AC1300 Gigabit Ethernet Gateway | ||||
1 2 | Related OET KnowledgeDataBase Inquiry: Is there a KDB inquiry associated with this application? | No | ||||
1 2 | Modular Equipment Type | Does not apply | ||||
1 2 | Purpose / Application is for | Original Equipment | ||||
1 2 | Composite Equipment: Is the equipment in this application a composite device subject to an additional equipment authorization? | Yes | ||||
1 2 | Related Equipment: Is the equipment in this application part of a system that operates with, or is marketed with, another device that requires an equipment authorization? | No | ||||
1 2 | Grant Comments | Power listed is the maximum combined conducted output power. End-users and responsible parties must be provided with operating and installation instructions to ensure RF exposure compliance. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 23 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter, except the collocation as described in this filing or in accordance with FCC multi-transmitter product guidelines. Operation in 5.15-5.25GHz band is restricted for indoor usage only. This device has 20 MHz, 40 MHz and 80 MHz bandwidth modes. | ||||
1 2 | Power listed is the maximum combined conducted output power. End-users and responsible parties must be provided with operating and installation instructions to ensure RF exposure compliance. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 23 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter, except the collocation as described in this filing or in accordance with FCC multi-transmitter product guidelines. This device has 20 MHz and 40 MHz bandwidth modes. | |||||
1 2 | Is there an equipment authorization waiver associated with this application? | No | ||||
1 2 | If there is an equipment authorization waiver associated with this application, has the associated waiver been approved and all information uploaded? | No | ||||
app s | Test Firm Name and Contact Information | |||||
1 2 | Firm Name |
Bureau Veritas CPS (H.K.) Ltd., Taoyuan Branch
|
||||
1 2 | Name |
R****** C********
|
||||
1 2 | Telephone Number |
+886-******** Extension:
|
||||
1 2 | Fax Number |
+886-********
|
||||
1 2 |
r******@tw.bureauveritas.com
|
|||||
Equipment Specifications | |||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Line | Rule Parts | Grant Notes | Lower Frequency | Upper Frequency | Power Output | Tolerance | Emission Designator | Microprocessor Number | |||||||||||||||||||||||||||||||||
1 | 1 | 15E | CC MO | 5180 | 5240 | 0.88 | |||||||||||||||||||||||||||||||||||
1 | 2 | 15E | CC MO | 5745 | 5825 | 0.684 | |||||||||||||||||||||||||||||||||||
Line | Rule Parts | Grant Notes | Lower Frequency | Upper Frequency | Power Output | Tolerance | Emission Designator | Microprocessor Number | |||||||||||||||||||||||||||||||||
2 | 1 | 15C | CC MO | 2412.00000000 | 2462.00000000 | 0.5800000 |
some individual PII (Personally Identifiable Information) available on the public forms may be redacted, original source may include additional details
This product uses the FCC Data API but is not endorsed or certified by the FCC