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Intellinet 522625 User Manual

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ADSL2+ Router
User's Guide
Rev. 1 July 2005
1

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Summary of Contents for Intellinet 522625

  • Page 1 ADSL2+ Router User’s Guide Rev. 1 July 2005...

  • Page 2: Table Of Contents

    Step 3: Install USB software and connect the USB cable(optional)...14 Step 4. Attach the power connector...15 Step 5. Turn on the ADSL2+ Router and power up your systems...15 Quick Start Part 2 — Configuring Your Computers ...16 Before you begin...16 Windows®...
  • Page 3 The Home Page and System View Table ...34 Modifying Basic System Information ...36 Modifying the Date and Time or Configuring SNTP ...36 Specifying theADSL2+ Router’s Name and Network Domain Name...38 Committing Changes and Rebooting ...39 Committing Changes...39 Rebooting the device using Configuration Manager ...40...
  • Page 4 Configuring Bridge/Router AutoSense (BRAS) Mode ...77 Configuring ZIPB Mode ...78 Viewing System IP Addresses and IP Performance Statistics ... 83 Viewing the ADSL2+ Router’s IP Addresses...83 Viewing IP Performance Statistics...84 Configuring Dynamic Host Configuration Protocol ... 85 Overview of DHCP...85 What is DHCP?...85...
  • Page 5 Adding IP Routes ...102 Configuring the Routing Information Protocol . 103 RIP Overview ...103 When should you configure RIP?...103 Configuring the ADSL2+ Router’s Interfaces with RIP ...104 Viewing RIP Statistics...106 Configuring Network Address Translation ... 109 Overview of NAT ...109 Viewing NAT Global Settings and Statistics...111...
  • Page 6 The Bimap rule: Performing two-way translations...125 The Pass rule: Allowing specific addresses to pass through untranslated ...126 Configuring Firewall Settings... 127 Configuring Global Firewall Settings ...127 Managing the Blacklist...130 Configuring Filters and Blocking Protocols ... 131 Configuring IP Filters ...132 Viewing Your IP Filter Configuration ...132 Configuring IP Filter Global Settings...133 Creating IP Filter Rules...134...
  • Page 7 Upgrading Using an Image Stored Locally...168 Uploading an Image Stored Remotely ...169 Storing and Restoring Configuration Settings...170 Modifying Port Settings ... 172 Overview of IP port numbers...172 Modifying the ADSL2+ Router’s Port Numbers...172 Configuring Autodetect ... 174 How Autodetect Works...174 Autodetect Modes ...174 Configuring Autodetect...175 IP Addresses, Network Masks, and Subnets...
  • Page 8 Subnet masks...177 Troubleshooting ... 179...
  • Page 10 About this User’s Guide This User’s Guide shows you how to set up the ADSL2+ Router and its configuration to meet the needs of your network and Internet connection type. This document is organized in five major parts, each containing several chapters: „...

  • Page 11: Getting Started

    Chapter 1 About Part 1 Part 1 Getting Started...

  • Page 12: About Part 1

    Part 1 Getting Started - ADSL2+ Router User’s Guide About Part 1 Part 1 provides an overview of the ADSL2+ Router’s features and basic setup and configuration instructions. All users are encouraged to follow these setup instructions when first installing the ADSL2+ Router on a network.

  • Page 13: Getting To Know

    You must have the following: Parts Check „ ADSL2+ modem for high-speed Internet access „ 10/100Base-T Ethernet router to provide Internet connectivity to all computers on your LAN „ USB port for connecting a USB-enabled PC „ Network address translation (NAT), firewall, and IP filtering functions to provide security for your LAN „...

  • Page 14: Quick Start

    Step 2. Connect the Ethernet cable. If you are connecting a LAN to the ADSL2+ Router, attach one end of the provided Ethernet cable to a regular hub port and the other end to the Ethernet port on the ADSL2+ Router .

  • Page 15: Step 4. Attach The Power Connector

    Step 5. Turn on the ADSL2+ Router and power up your systems. Press the On/Off switch on the back panel of the device to the On position.

  • Page 16: Quick Start Part 2 - Configuring Your Computers

    Quick Start Part 2 — Configuring Your Computers Quick Start Part 2 provides instructions for configuring the Internet settings on your computers to work with the ADSL2+ Router. Before you begin By default, the ADSL2+ Router automatically assigns all required Internet settings to your PCs.

  • Page 17: Windows 2000 Pcs

    7. If prompted, click the new settings. Next, configure the PCs to accept IP information assigned by the ADSL2+ Router: 8. In the Control Panel, double-click the Network and Dial-up Connections icon. 9. In Network and Dial-up Connections window, right-click the Local Area Connection icon, and then select Properties.

  • Page 18: Windows Me Pcs

    ADSL2+ Router User’s Guide Windows ME PCs 1. In the Windows task bar, click the Start button, point to Settings, and then click Control Panel. 2. Double-click the Network and Dial-up Connections icon. 3. In the Network and Dial-up Connections window, right-click the Network icon, and then select Properties.

  • Page 19: Windows 95, 98 Pcs

    PC and complete the TCP/IP installation. Next, configure the PCs to accept IP information assigned by the ADSL2+ Router: 8. Open the Control Panel window, and then click the Network icon. 9. Select the network component labeled TCP/IP, and then...

  • Page 20: Windows Nt 4.0 Workstations

    ADSL2+ Router User’s Guide Windows NT 4.0 workstations First, check for the IP protocol and, if necessary, install it: 1. In the Windows NT task bar, click the Start button, point to Settings, and then click Control Panel. 2. In the Control Panel window, double click the Network icon.

  • Page 21: Assigning Static Internet Information To Your Pcs

    In some cases, you may want to assign Internet information to some or all of your PCs directly (often called “statically”), rather than allowing the ADSL2+ Router to assign it. This option may be desirable—but not required—if: „ You have obtained one or more public IP addresses that...

  • Page 22: Connecting A Computer To The Usb Port

    ADSL2+ Router User’s Guide Connecting a computer to the USB port If you use the ADSL2+ Router’s USB port to connect to a PC, you must install the provided USB driver software on the PC. The driver enables Ethernet-over-USB communication with the ADSL2+ Router.
  • Page 23 Chapter 1 About Part 1 Figure 2. DSL Modem Setup Wizard—License Agreement Page 5. Review the terms of the license, and, if you agree to the terms, click The Installing window displays as the Wizard prepares your system for the installation: Figure 3.
  • Page 24 ADSL2+ Router User’s Guide Figure 4. USB Setup Wizard—Prompt for Hardware Plug In 6. Connect the USB cable to the ADSL-Ethernet router and to your computer. The provided USB cable provided has a flat connector on one end (called Type A) and a square connector on the other (Type B).
  • Page 25 USB PC. Now that the USB driver installation is complete, you must configure the USB PC so that its IP properties place it in the same subnet as the ADSL2+ Router’s USB port. There are two ways to do this: „...

  • Page 26: Logging In To The Adsl2+ Router Quick Configuration Page

    Quick Configuration page. Follow these instructions configure the device settings: 1. At any PC connected to the ADSL2+ Router via Ethernet or USB, open your Web browser, and type the following URL in the address/location box: 192.168.1.1...
  • Page 27 ATM interface if you are using different types of services with your ISP. (Chapter 5) Operation Enables or disables the ADSL2+ Router. When set to Mode "Disabled", the device cannot be used to provide Internet connectivity or routing services for your network.

  • Page 28: Default Router Settings

    Quick Configuration settings and return to the default values. Default Router Settings The ADSL2+ Router can provide a variety of services to your network. The device is preconfigured with default settings for use with a typical home or small office network.
  • Page 29 Table 1. Default Settings Summary Option Default Properties LAN interfaces — connecting to your network Ethernet Static IP address: 192.168.1.1 Subnet mask: 255.255.255.0 DHCP server pool of addresses: 192.168.1.3 through 192.168.1.34 Static IP address: 192.168.1.2 Subnet mask: 255.255.255.0 WAN interface — connecting to the Internet ATM VC VPI = 0 VCI = 35...

  • Page 30: Testing Your Setup

    Testing Your Setup The Quick Start process should enable any computer on your LAN to use the ADSL2+ Router to access the Internet. To test the connection, turn on the device, wait about 30 seconds, and then verify that its LEDs are illuminated as shown in Table 2.

  • Page 31: Getting Started With The Configuration Manager

    It enables you to configure the device settings to meet the needs of your network. You access it through your web browser from any PC connected to the ADSL2+ Router via the LAN or USB ports.
  • Page 32 ADSL2+ Router User’s Guide Note Figure 8. Login Screen 2. Enter your user name and password, and then click The first time you log into the program, use these defaults: Default User Name: root Default Password: root You can change the password at any time (see Chapter 15 for instructions).

  • Page 33: Functional Layout

    Functional Layout Configuration Manager tasks are grouped into categories, which you can access by clicking the tabs at the top of each page. Each tab displays the available tasks in a horizontal menu at the top of the page. You can click on these menu items to display the specific configuration options.

  • Page 34: The Home Page And System View Table

    Table Heading Description Device Displays basic information about the ADSL2+ Router hardware and software versions, the system uptime (since the last reboot), and the preconfigured operating mode. Displays the operational status, version, and performance statistics for the DSL line. You can...
  • Page 35 Chapter 4. Services Summary Displays the status of various services that the ADSL2+ Router performs to help you manage your network. A green check mark indicates the service is active and a red X indicates that it is inactive: NAT: Translates private IP addresses to your public IP address.

  • Page 36: Modifying Basic System Information

    You can modify the system date and time or configure the device to acquire this information from an ISP server. You can also assign a name to the ADSL2+ Router and to the network domain in which it resides. Modifying the Date and Time or Configuring SNTP...
  • Page 37 2. Modify the fields on this page as required. The following table describes each field: Option Description SNTP To enable SNTP, click the Enable radio button. The remaining date and time fields will be dimmed (unavailable for entry). Date and Time To set the date and time manually, ensure that the SNTP field is set to Disable.

  • Page 38: Specifying Theadsl2+ Router's Name And Network Domain Name

    Specifying theADSL2+ Router’s Name and Network Domain Name You can specify an easy-to-remember name for the ADSL2+ Router and a domain name for the network on which it resides. These are used only to simplify access to the Configuration Manager program.

  • Page 39: Committing Changes And Rebooting

    Committing Changes and Rebooting Committing Changes Whenever you use Configuration Manager to change system settings, the changes are initially placed in temporary storage called random access memory or RAM. Your changes are made effective when you submit them, but will be lost if the device is reset or turned off.

  • Page 40: Rebooting The Device Using Configuration Manager

    Reboot from Backup Configuration setting to return to the previous settings. If the ADSL2+ Router provides a Reconfigure button on the back panel (in addition to the power on/off button), do not use it to activate new changes. This button resets the device settings to the...
  • Page 41 Part 2 Interfaces and Operating Modes...

  • Page 42: About Part 2

    ADSL2+ Router User’s Guide Definitions About Part 2 Part 2 explains how to configure theADSL2+ Router’s interfaces to communicate with your LAN PC(s) and your ISP. Part 2 also describes the device’s operating modes and explains how to configure the interfaces to enable each mode.

  • Page 43: Configuring The Lan And Usb Interfaces

    Connecting Your PCs via Ethernet and/or USB If you are using the ADSL/Ethernet router with multiple PCs on your LAN, you must connect the LAN via an Ethernet hub or switch to the device's LAN port, also called the Ethernet port.

  • Page 44: Configuring The Lan (Ethernet) Interface

    Note Configuring the LAN (Ethernet) Interface In order to use the device as a router on your LAN, Internet Protocol (IP) properties must be assigned to the LAN interface. These properties must identify the interface as residing in the same subnet as the PCs on your LAN.
  • Page 45 ISP is not your LAN IP address. The public IP address identifies the WAN (ADSL) port on your ADSL/Ethernet router to the Internet. (Or, in bridge configurations, it may be assigned to your PC.) The IP address and network mask for the port. See Appendix A for and overview of IP addresses and masks.
  • Page 46 ADSL2+ Router User’s Guide Speed/Duplex Speed indicates the speed of the Ethernet communication between the ADSL/Ethernet router and the LAN PCs or hub. Duplex indicates the type of Ethernet communication (i.e., full duplex, or half- duplex). These settings are not user-configurable.

  • Page 47: Configuring The Usb Interface Ip Address

    PC connected to the device via USB, a page will display to confirm your change and your connection will remain active. „ If you enabled the DHCP service, the ADSL/Ethernet router will initiate a request for an IP address from your LAN's DHCP server.
  • Page 48 ADSL2+ Router User’s Guide „ If you changed the USB interface IP address while working from the USB-attached computer, then the connection will be terminated. „ If you were using the Ethernet interface, a page will display to confirm your change and your connection will remain active.

  • Page 49: Configuring Wan Interfaces

    Internet. The virtual circuit (VC) properties of the ATM VC interface identify a unique path that your ADSL/Ethernet router uses to communicate via the ATM- based network with the telephone company central office equipment.

  • Page 50: Configuring The Atm Vc

    Internet data services typically use an AAL5- type interface. Vpi, Vci, and Mux These settings identify a unique ATM data path for Type communication between your ADSL/Ethernet router and your ISP. Max Proto per If you are using an AAL5-type of interface, this setting AAL5...

  • Page 51: Modifying Atm Vcs

    Modifying ATM VCs Your device may contain placeholder values that you must change to establish an ATM connection. Contact your ISP to determine your ATM VC values. Follow these instructions to modify a preconfigured VC: 1. From the ATM VC Configuration page, click Actions column for the interface you want to modify.

  • Page 52: Adding Atm Vcs

    ADSL2+ Router User’s Guide Adding ATM VCs You can create an ATM VC interface if none has been predefined on your system or if you use multiple services with your ISP. Each service may require its own VC. Follow these instructions to add a 1.

  • Page 53: Configuring Ppp Interfaces

    Configuring PPP Interfaces The Point-to-Point Protocol (PPP) is one of several protocols used to enable communication between ISPs and their customers. PPP handles tasks such as the following: „ Identify the type of service the ISP should provide to a given customer „...
  • Page 54 ADSL2+ Router User’s Guide You can configure the following settings on the PPP Configuration page: „ Inactivity TimeOut...: The time in minutes that must elapse before a PPP connection times-out due to inactivity. This setting applies only to PPP interfaces that are configured as “start-on-data”...
  • Page 55 PPP connection will be distributed to clients of the device's DHCP server. This option is useful only when the ADSL/Ethernet Router is configured to act as a DHCP server for your LAN. When set to Disable, LAN hosts will use the DNS address(es) specified in the DHCP pool (see “Configuring DHCP Server”...

  • Page 56: Viewing Ppp Interface Details

    ADSL2+ Router User’s Guide Viewing PPP Interface Details When you click to view additional details, the PPP Interface - Detail page displays: Figure 18. PPP – Detail Page In addition to the properties defined on page 54, the Detail page...
  • Page 57 Field Description Last Fail Cause Indicates the action that ended the previous PPP session: No Valid PADO Recvd: The device initiated a PPoE handshake but did not receive a packet in reply from the ISP. No Valid PADS Recvd: After the initial handshake, the device did not receive a confirmation packet from the ISP.

  • Page 58: Adding A Ppp Interface

    ADSL2+ Router User’s Guide Note Adding a PPP Interface Follow this procedure to add a PPP interface. If you need to use more than one PPP connection, you may be able to create multiple PPP interfaces. The number and type of...

  • Page 59: Configuring Eoa Interfaces

    Configuring EoA Interfaces The Ethernet-over-ATM (EoA) protocol is often referred to as RFC1483, which is the Internet specification that defines it. It is commonly used to carry data from an Ethernet-based local area network over the ATM-based wide area network. Unlike PPP, EoA can be implemented to provide a bridged connection between a DSL modem and the ISP.
  • Page 60 If the interface will be used for bridging with your ISP and you will not be using the ADSL2+ Router as a router on your LAN, then you do not need to specify IP information. If you enable...

  • Page 61: Adding Eoa Interfaces

    Field Description Status A green or red ball will display to indicate that the interface is currently up or down, respectively. You cannot manually enable or disable the interface; a red ball may indicate a problem with the DSL connection or the connection to the ISPs access server.
  • Page 62 ADSL2+ Router User’s Guide 7. If your ISP will assign the IP address from their DHCP server, click the Enable radio button in the Use DHCP field. When DHCP is enabled, the address you entered in the Conf. IP Address field will be requested from the DHCP server; the server many assign a different address if necessary.
  • Page 63 To enable bridging with your ISP, select the EoA interface and the LAN interface(s) (eth-0 and/or usb-0). You can enable bridging on an IP-enabled EoA interface; in this case, the same interface will be capable of handling both bridged and routed data packets. 14.

  • Page 64: Configuring Ipoa Interfaces

    ADSL2+ Router User’s Guide Configuring IPoA Interfaces An IPoA interface can be used to exchange IP packets over the ATM network, without using an underlying Ethernet over ATM (EoA) connection. Typically, this type of interface is used only in product development and test environments, to eliminate unneeded variables when evaluating IP protocol processing.
  • Page 65 DHCP server, which may assign another address. Gateway Address The external IP address that the ADSL/Ethernet router communicates with via the IPoA interface to gain access to the Internet. This is typically an ISP server. Status A green or red ball will display to indicate that the interface is currently up or down, respectively.

  • Page 66: Adding Ipoa Interfaces

    ADSL2+ Router User’s Guide Adding IPoA Interfaces Follow these instructions to add an IPoA interface: 1. Display the IPoA page and click The IPoA Interface – Add page displays: Figure 25. IPoA Interface – Add Page 2. Select the next available interface name from the IPoA Interface drop-down list.
  • Page 67 9. Click A confirmation page will display to confirm your changes. 10. Click to return to the IPoA page and view the new interface in the table. IPoA interfaces must be mapped to a lower ATM VC interface before they can be used. Follow these instructions to map and IPoA interface to an ATM VC: 11.

  • Page 68: Configuring The System Operating Modes

    Configuring the System Operating Modes The ADSL2+ Router can operate as a router, a bridge, or both. The system operating mode is determined by how you configure the LAN and WAN interfaces to exchange data within your network and with your ISP. This chapter provides an overview of how routers...

  • Page 69: How Routers Work

    (or by an administrator or an automated mechanism called DHCP). Within a group of networked computers, a router can associate each PC’s assigned IP address with its MAC address. When a PC initiates communication through the router outside the network, the router sends out IP packets to the Internet on behalf of the PC, revealing only the PC’s IP address.

  • Page 70: Overview Of System Operating Modes

    ADSL2+ Router User’s Guide Overview of System Operating Modes The ADSL2+ Router can operate in Bridging mode, Routing mode, or Routing and Bridging mode. You can view the currently configured mode in the System View table on the Home page, as shown in Figure 28.

  • Page 71: Configuring Routable And Bridgeable Interfaces

    Configuring Routable and Bridgeable Interfaces Making Interfaces Routable (IP-Enabled) A routable or IP-enabled interface is simply one that has been assigned an IP address. IP-enabled interfaces are capable of forwarding IP packets. You can assign IP addresses to any LAN or WAN interface.

  • Page 72: Enabling Bridging Mode

    ADSL2+ Router User’s Guide 2. In the interface table, select all interface names on which you want to perform bridging and click To enable bridging with your ISP, select the LAN interface (eth-0 and/or usb-0) and the EoA interface you created for the bridging path.

  • Page 73: Common Scenarios

    With this configuration, all IP packets originating from your LAN and destined for the Internet will be routed to the PCs’ default gateway (the LAN interface), then to the ADSL2+ Router’s default gateway (the WAN interface), and then to the WAN interface’s gateway (the ISP’s access server).

  • Page 74: Scenario 2: Bridged Connection To Isp

    ISP as a bridge, its Ethernet interface must remain IP- enabled to allow you access to the Configuration Manager program through your Web browser. The ADSL2+ Router can also continue to provide certain IP-based services to your LAN such as DHCP server and DNS relay.

  • Page 75: Scenario 3: Routed And Bridged Connections To Isp

    Scenario 3: Routed and Bridged Connections to ISP In this configuration, the LAN is like that described in Scenario 1, but also includes PCs that use a bridged Internet connection. You would then need to establish bridging services in addition to routing. This would also be necessary if the LAN contains PCs that use non- IP networking protocols, such has AppleTalk or IPX.

  • Page 76: Configuring Special Bridging Features

    ADSL2+ Router User’s Guide Configuring Special Bridging Features Configuring WAN-to-WAN Bridging WAN-to-WAN bridging refers to the bridging of data between WAN interfaces. This can occur only when bridging is enabled on the device and it has two or more WAN interfaces. With WAN-to-WAN...

  • Page 77: Configuring Bridge/Router Autosense (Bras) Mode

    Configuring Bridge/Router AutoSense (BRAS) Mode In Bridge-Router AutoSense (BRAS) mode, the ADSl2+ Router chooses at startup whether to operate in Routing and Bridging mode or in Bridging-only mode, based on information it learns while communicating with the LAN PCs. This capability allows units to be delivered to customers with one preconfiguration for both deployment types.

  • Page 78: Configuring Zipb Mode

    Note Note Configuring ZIPB Mode The ADSL2+ Router offers a special type of bridging mode called ZIPB (Zero Installation PPP Bridge) mode. This mode enables the ISP to simplify the installation process for customers who will be using the device as a bridge. ZIPB mode also allows customers to use the embedded firewall features, which are normally not available on bridged connections.
  • Page 79 8. Click A page displays briefly to confirm the change, and the System Mode page redisplays. 9. If you want the changes to be permanent, follow the instructions on page 39 to commit them. Chapter 2. About Part 2...
  • Page 81 Part 3 Routing and IP-Related Features...

  • Page 82: About Part 3

    IP addresses. „ Chapter 11, “Configuring the Routing Information Protocol,” explains how to configure a protocol that enables the ADSL2+ Router to share its routing information with other routers on your LAN or the Internet.

  • Page 83: Viewing System Ip Addresses And Ip Performance Statistics

    See Appendix A for a description of IP addresses and masks. Viewing the ADSL2+ Router’s IP Addresses To view the ADSL2+ Router’s IP addresses, click the Routing tab, and then click displays: Figure 31. IP Address Table Page The table lists the IP addresses, network masks (“Net Mask”), and...

  • Page 84: Viewing Ip Performance Statistics

    ADSL2+ Router User’s Guide Viewing IP Performance Statistics You can view statistics on the processing of Internet protocol packets (a packet is a collection of data that has been bundled for transmission). You will not typically need to view this data, but you may find it helpful when working with your ISP to diagnose network and Internet data transmission problems.

  • Page 85: Configuring Dynamic Host Configuration Protocol

    When you enable DHCP on a network, you allow a device — such as the ADSL2+ Router or a router located with your ISP — to assign temporary IP addresses to your computers whenever they connect to your network. The assigning device is called a DHCP server, and the receiving device is a DHCP client.

  • Page 86: Adsl2+ Router Dhcp Modes

    DHCP relay agent. When a computer logs onto the network, the ADSL2+ Router contacts the ISP for the necessary IP information, which it relays back to the computer. „ If you have another PC or device on your network already performing the DHCP server function, then you can configure the device’s LAN interface to be a DHCP client of...

  • Page 87: Configuring Dhcp Server

    Configuring DHCP Server Before you begin, be sure to configure your PCs to accept DHCP information assigned by a DHCP server. See “Quick Start Part 2 — Configuring Your Computers,” for instructions. Note To set up DHCP server, you first define the ranges of IP addresses that you want to be distributed to your PCs, called DHCP server address pools.

  • Page 88: Adding Dhcp Server Address Pools

    ADSL2+ Router User’s Guide Adding DHCP Server Address Pools Follow these instructions to create an IP address pool: 1. Log into Configuration Manager, click the LAN tab, and then DHCP Server click in the task bar. The DHCP Server Configuration page displays: Figure 33.
  • Page 89 Field Description Start/End IP Specifies the lowest and highest addresses in Addresses the pool, up to a maximum range of 254 addresses. For example, if the LAN interface is assigned IP address 192.168.1.1, then you could create a pool with address range 192.168.1.2 –...

  • Page 90: Viewing, Modifying, And Deleting Address Pools

    ADSL2+ Router User’s Guide A confirmation page displays briefly to indicate that the pool has been added successfully. After a few seconds, the DHCP Server Pool – Add page displays with the newly added pool. 5. Follow the instructions in “Setting the DHCP Mode” on page 93 to enable the DHCP Server.

  • Page 91: Excluding Ip Addresses From A Pool

    (see page 39). Viewing current DHCP address assignments When the ADSL2+ Router functions as a DHCP server for your LAN, it keeps a record of any addresses currently leased to your computers. To view a table of all current IP address assignments,...

  • Page 92: Configuring Dhcp Relay

    In this case, you can configure the device as a DHCP relay agent. When a computer on your network requests Internet access, the ADSL2+ Router contacts your ISP to obtain an IP address (and other information), and then forwards that information to the computer.

  • Page 93: Setting The Dhcp Mode

    5. Click A page displays to confirm your changes, and the program returns to the DHCP Relay Configuration page. 6. Follow the instructions in “Setting the DHCP Mode” to set the DHCP mode to DHCP Relay. Setting the DHCP Mode You must enable the appropriate DHCP mode to activate your DHCP relay or DHCP server settings.

  • Page 95: Configuring Dns Server Addresses

    In either case, you can specify the actual addresses of the ISP's DNS servers (on the PC or in the DHCP pool), or you can specify the address of the LAN interface on the ADSL/Ethernet router (e.g., 192.168.1.1). When you specify the LAN interface IP address, the device performs DNS relay, as described in the following section.

  • Page 96: Configuring Dns Relay

    ADSL2+ Router User’s Guide Configuring DNS Relay When you specify the ADSL2+ Router's LAN interface IP address as the DNS address, then the device automatically performs “DNS relay”; i.e., because the device itself is not a DNS server, it forwards domain name lookup requests it receives from the LAN PCs to a DNS server at the ISP.
  • Page 97 Click the Services tab, and then click DNS in the task bar. The DNS Configuration page displays. Figure 39. DNS Configuration Page Type the IP address of the DNS server in an empty row and click You can enter up to two addresses. Click the DNS Relay Poll Status check box if you want the software to send regular test messages to the DNS servers to ensure that they remain up (recommended).

  • Page 98: Configuring Ip Routes

    IP address of the destination computer (the “phone number”). All your outgoing requests first go to the same router at your ISP (the first “switchboard”). That router looks at the network ID portion of the destination address (the “area code”) and determines which next...

  • Page 99: Hops And Gateways

    “Quick Start Part 2 — Configuring Your Computers.”) „ On the ADSL2+ Router itself, a default gateway is defined to direct all outbound Internet traffic to a router at your ISP. This default gateway is assigned automatically by your ISP whenever the device negotiates an Internet connection.

  • Page 100: Viewing The Ip Routing Table

    IP addresses, the table lists the IP address of the first hop the data should take. This table is known as the device’s routing table. To view the ADSL2+ Router’s routing table, click the Routing tab. The IP Route page displays by default: Figure 40. IP Route Table Page The IP Route Table displays a row for each existing route.
  • Page 101 Indicates whether the route is direct or indirect. In a direct route, the source and destination computers are on the same network, and the router attempts to directly deliver the data to the computer. In an indirect route, the source and destination computers are on different networks, and the router forwards data to a device on another network for further handling.

  • Page 102: Adding Ip Routes

    ADSL2+ Router User’s Guide Adding IP Routes Follow these instructions to add an IP route to the routing table. 1. From the IP Route Table page, click The IP Route – Add page displays: Figure 41. IP Route – Add Page 2.

  • Page 103: Configuring The Routing Information Protocol

    When should you configure RIP? Most small home or office networks do not need to use RIP; they have only one router, such as the ADSL2+ Router, and one path to an ISP. In these cases, there is no need to share routes, because all Internet data from the network is sent to the same ISP gateway.

  • Page 104: Configuring The Adsl2+ Router's Interfaces With Rip

    The following instructions describe how to enable RIP on the ADSL2+ Router. In order for the ADSL2+ Router to communicate with other devices using RIP, you must also enable the other devices to use the protocol. See the product documentation for those devices.
  • Page 105 The Receive Mode setting indicates the RIP version(s) in which information must be passed to the ADSL2+ Router in order for it to be accepted into its routing table.

  • Page 106: Viewing Rip Statistics

    ADSL2+ Router User’s Guide Viewing RIP Statistics From the RIP Configuration page, you can click to view statistics on attempts to send and receive route table data over RIP-enabled interfaces on the ADSL2+ Router. Figure 43. RIP Global Statistics Page...
  • Page 107 Part 4 Security Features...

  • Page 108: About Part 4

    ADSL2+ Router User’s Guide About Part 4 Part 4 describes features you can configure to provide security to your network. Part 4 contains the following chapters: „ Chapter 12, “Configuring Network Address Translation,” explains how NAT works to allow one public Internet address to be shared among multiple PCs on your LAN.

  • Page 109: Configuring Network Address Translation

    LAN a unique private IP address. (Or, you define a pool of private IP addresses for dynamic assignment to your computers, as described in Chapter 8.) On the ADSL2+ Router, you set up a NAT rule to specify that whenever one of your computers communicates with the Internet, (that is, it sends and receives IP data packets) its private IP address—which is referenced in each...
  • Page 110 Data packets that arrive in response contain the public IP address as the destination IP address and the disguised source port number. The ADSl2+ Router changes the IP address and source port number back to the original values (having kept track of the changes it made earlier), and then routes the packet to the originating computer.

  • Page 111: Viewing Nat Global Settings And Statistics

    Viewing NAT Global Settings and Statistics To view your NAT settings, log into Configuration Manager, and click the Services tab. The NAT Configuration page displays by default: Figure 44. NAT Configuration Page The NAT Configuration page contains the following elements: „...
  • Page 112 ADSL2+ Router User’s Guide Field Description TCP Idle Timeout (sec) When two computers communicate via the Internet, a TCP-based communication TCP Close Wait (sec) session is created between them to control TCP Def Timeout (sec) the exchange of data packets. The TCP...
  • Page 113 Figure 45. NAT Rule Global Statistics Page The table provides basic information for each NAT rule you have set up. You can click to restart the accumulation of the statistics at their initial values.

  • Page 114: Viewing Nat Rules And Rule Statistics

    ADSL2+ Router User’s Guide Viewing NAT Rules and Rule Statistics To view the NAT rules currently defined on your system, select NAT Rule Entry in the NAT Options drop-down list. The NAT Rule Configuration page displays: Figure 46. NAT Rule Configuration Page The NAT Rule Configuration table displays a row containing basic information for each rule.

  • Page 115: Viewing Current Nat Translations

    Viewing Current NAT Translations To view a list of NAT translations that have recently been performed and which remain in effect (for any of the defined rules), select NAT Translations from the NAT Options drop-down list. The NAT Translations page displays: Figure 48.
  • Page 116 ADSL2+ Router User’s Guide Figure 49. NAT Translation – Details Page In addition to the information displayed in the NAT Translations table, this table displays the following for the selected current translation sessions: Field Description Translated The public IP address to which the private IP InAddress address was translated.

  • Page 117: Adding Nat Rules

    Adding NAT Rules This section explains how to create rules for each NAT flavor. You cannot edit existing NAT rules. To change a rule setup, delete it and add a new rule with the new settings. Note rule: Translating between private and public IP NAPT addresses Follow these instructions to create a rule for translating the private...
  • Page 118 ADSL2+ Router User’s Guide 4. Enter a Rule ID. The Rule ID determines the order in which rules are invoked (the lowest numbered rule is invoked first, and so on). If you define two or more rules that act on the same set of IP addresses, be sure to assign the Rule ID so that the higher priority rules are invoked first.

  • Page 119: The Rdr Rule: Allowing External Access To A Lan Computer

    IP address is translated to your public IP address in all incoming and outgoing data packets. Without an RDR rule (or Bimap rule described on page 125), the ADSL2+ Router blocks attempts by external computers to access your LAN computers. Note...
  • Page 120 ADSL2+ Router User’s Guide Follow these instructions to add an RDR rule (see steps 1-4 under "The NAPT rule" on page 117 for specific instructions corresponding to steps 1 and 2 below): 1. Display the NAT Rule – Add Page, select RDR as the Rule Flavor, if necessary, and enter a Rule ID.
  • Page 121 A port ID identifies the specific function of the computer connected to it, and therefore can limit the types of data that pass to and from the computer. For example, Web (HTTP) servers are usually identified by port number 80; packets containing traffic destined for a Web server will contain this port ID.

  • Page 122: The Basic Rule: Performing 1:1 Translations

    ADSL2+ Router User’s Guide The Basic rule: Performing 1:1 translations The Basic flavor translates the private (LAN-side) IP address to a public (WAN-side) address, like NAPT rules. However, unlike NAPT rules, Basic rules do not also translate the port numbers in the packet header;...

  • Page 123: The Filter Rule: Configuring A Basic Rule With Additional Criteria

    5. In the Global Address From and Global Address To fields, type the starting and ending addresses that identify the pool of public IP addresses that the private addresses should be translated to. Or, type the same address in both fields (if you also specified a single address in step 4).
  • Page 124 ADSL2+ Router User’s Guide 3. Select a protocol to which this rule applies, or choose ANY. This selection specifies which type of Internet communication will be subject to this translation rule. You can select ANY if the rule applies to all data. Or, select TCP, UDP, ICMP, or a number from 1-255 that represents the Internet Assigned Numbers Authority (IANA)-specified protocol number.

  • Page 125: The Bimap Rule: Performing Two-Way Translations

    Unlike the other NAT flavors, the Bimap flavor performs address translations in both the outgoing and incoming directions. In the incoming direction, when the specified ADSL2+ Router interface receives a packet with your public IP address as the destination address, this address is translated to the private IP address of a computer on your LAN.

  • Page 126: The Pass Rule: Allowing Specific Addresses To Pass Through Untranslated

    ADSL2+ Router User’s Guide The Pass rule: Allowing specific addresses to pass through untranslated You can create a Pass rule to allow a range of IP addresses to remain untranslated when another rule would otherwise do so. Figure 55. NAT Rule – Add Page (Pass Flavor) The Pass rule must be assigned a rule ID that is a lower number than the ID assigned to the rule it is intended to pass.

  • Page 127: Configuring Firewall Settings

    Configuring Firewall Settings Configuration Manager provides built-in firewall functions, enabling you to protect the system against denial of service (DoS) attacks and other unwelcome or malicious accesses to your LAN. You can also specify how to monitor attempted attacks, and who should be automatically notified.
  • Page 128 ADSL2+ Router User’s Guide 2. Configure the following settings as needed: Field Description Black List Status If you want the device to maintain a blacklist, click the Enable radio button. Click the Disable radio button if you do not want to maintain a list.
  • Page 129 Field Description Log Destination Specifies how attempted violations of the firewall settings will be tracked. Records of such events can be sent via Ethernet to be handled by a system utility (Trace) or can e-mailed to specified administrators. E-mail ID of Specifies the e-mail addresses of the Admin 1/2/3 administrators who should receive notices of any...

  • Page 130: Managing The Blacklist

    ADSL2+ Router User’s Guide Managing the Blacklist If data packets are received that violate the firewall settings or any of the IP filter rules, then the source IP address of the offending packets can be blocked from such accesses for a specified period of time.

  • Page 131: Configuring Filters And Blocking Protocols

    „ The blocked protocols feature enables you to select from a predefined list the protocol that you want to block. All data passed to the ADSL/Ethernet router using a blocked protocol will be discarded, without consideration of the source computer, destination computer, or the device...

  • Page 132: Configuring Ip Filters

    Configuring IP Filters When you define an IP filter rule and enable the feature, you instruct the ADSL2+ Router to examine each data packet it receives to determine whether it meets criteria set forth in the rule. The criteria can include the size of the packet, the network or internet protocol it...

  • Page 133: Configuring Ip Filter Global Settings

    Configuring IP Filter Global Settings The IP Filter Configuration page enables you to configure the following global IP filter settings. „ Security Level: This setting determines which IP filter rules take effect, based on the security level specified in each rule.

  • Page 134: Creating Ip Filter Rules

    ADSL2+ Router User’s Guide Creating IP Filter Rules To create an IP filter rule, you set various criteria that must be met in order for the rule to be invoked. Use these instructions to add a new IP filter rule. Also refer to the examples on page 139: 1.
  • Page 135 You can use rules that specify the incoming direction to restrict external computers from accessing your LAN. Interface The interface on the ADSL2+ Router on which the rule will take effect. See the examples on page 139 for suggestions on choosing the appropriate interface for various rule types.
  • Page 136 IP address that is outside the specified range. self: the IP address of the ADSL/Ethernet router interface on which this rule takes effect. bcast: (destination address only) Specifies that the rule will be invoked for any packets sent to the broadcast address for the receiving interface.
  • Page 137 Field Protocol The basic IP protocol criteria that must be met for rule to be invoked. Using the options in the drop-down list, you can specify that packets must contain the selected protocol (eq), that they must not contain the specified protocol (neq), or that the rule can be invoked regardless of the protocol (any).
  • Page 138 ADSL2+ Router User’s Guide Field ICMP Code Specifies whether the value in the code field in ICMP packet headers will be used as criteria. The code value can be any decimal value from 0-255. You can specify that the value must equal (eq) or not equal (neq) the...

  • Page 139: Ip Filter Rule Examples

    3. When you are done selecting criteria, ensure that the Enable radio button is selected at the top of the page, and then click After a confirmation page displays, the IP Filter Configuration page will redisplay with the new rule showing in the table. If the security level of the rule matches the globally configured setting, a green ball displays in the Status column for that rule, indicating that the rule is now in effect.

  • Page 140: Viewing Ip Filter Statistics

    When two computers communicate using the IP protocol, an IP session is created for the duration of the communication. The ADSL2+ Router allows a fixed number of concurrent IP sessions. You can view information about each current IP session and delete sessions (for security reasons, for example).
  • Page 141 Figure 61. IP Filter Sessions Page The IP Filter Session table displays the following fields for each current IP session: Field Session Index The ID assigned by the system to the IP session (all sessions, whether or not they are affected by an IP filter rule, are assigned a session index) Time to expire The number of seconds in which the connection will...

  • Page 142: Configuring Bridge Filters

    "layer 3" (e.g., IP) packets. Bridge filtering is also referred to as raw filtering. When the bridge filtering feature is enabled, the bridge/router examines each incoming layer 2 packet and compares it to the bridge filter rules. The bridge filter rules specify which bits of the packet are to be examined, and what criteria those bits must meet in order to qualify as a match for the rule.

  • Page 143: Adding Bridge Filter Rules

    Field Enable/Disable You can click the Enable and Disable radio buttons to activate/deactivate the service. Although each rule can be independently enabled and disabled, no rules will be effective unless the Enable radio button is selected here. Default Action Your selection in the Default Action drop-down list determines the action to be taken on all packets that do not match a bridge filter rule.
  • Page 144 Interface criteria is set to ppp-0, then the In Interface could be set to usb-0. This specifies that the rule applies only to packets passed from the USB computer through the router's PPP interface. This option is valid only for rules defined for the outgoing direction.
  • Page 145 Now, you can add subrules to specify criteria for the rule: 5. On the Bridge Filter Configuration page, click in the Action(s) column of the rule for which you want to created a subrule. The Bridge Filter Subrule - Add page displays: Figure 64.
  • Page 146 ADSL2+ Router User’s Guide Field Cmp. Type Comparison Type - The method for comparing the selected bits, after the mask is applied, to a reference value (or range of values) that you specify (see the next setting). Compared to the reference value, the...

  • Page 147: Bridge Filter Rule Example

    Filter Rule - Modify page, select the Enable radio button and click „ At least one subrule: On the Bridge Filter Configuration page, you can enable a subrule by editing it. Click Actions column in the row for the subrule. On the Bridge Filter Subrule - Modify page, select the Enable radio button and click If a rule is enabled but none of its subrules are enabled, then the...

  • Page 148: Editing And Deleting Rules And Subrules

    ADSL2+ Router User’s Guide Editing and Deleting Rules and Subrules In the table on the Bridge Filter Rule page, the following items display in the Actions column for each rule and subrule: Button Edits the rule or subrule. The Bridge Filter Rule - Modify or Bridge Filter Subrule - Modify page displays.

  • Page 149: Blocking Protocols

    Blocking Protocols The Blocked Protocols feature enables you to prevent the ADSL/Ethernet router from passing any data that uses a particular protocol. Unlike the IP filter feature, you cannot specify additional criteria for blocked protocols, such as particular users or destinations.
  • Page 150 ADSL2+ Router User’s Guide Protocol IP Multicast IP Multicast is an extension to the IP protocol. It enables individual packets to be sent to multiple hosts on the Internet, and is often used for handling e-mail mailing lists and teleconferencing/videoconferencing.
  • Page 151 Part 5 Administrative Tasks and System Monitoring...

  • Page 152: About Part 5

    ADSL2+ Router User’s Guide About Part 5 Part 5 describes tools that LAN administrator can use to monitor the system performance and control access to the Configuration Manager program. Part 5 contains the following chapters: „ Chapter 15, “Managing Access,” describes how to...

  • Page 153: Managing Access To The Configuration Program

    WAN port. Managing User Logins The ADSL2+ Router is configured with a default user name and password combination, or login, for accessing Configuration Manager. If you want to allow other users to access the program, you can create additional user logins and specify their privilege levels.
  • Page 154 ADSL2+ Router User’s Guide 2. Click to display the User Config-Add page: Figure 67. User Config-Add Page 3. Type the User ID and Password in the text boxes provided, and then select the privilege level for this user, as described on 153.

  • Page 155: Changing Login Passwords

    Changing Login Passwords Users of all privilege levels can modify their own password. Only users with Root privileges can modify other users’ passwords. Follow these instructions to change a login password. This user ID and password are used only for logging into the Configuration Manager;...

  • Page 156: Enabling Management Through The Wan Port

    ADSL2+ Router User’s Guide Enabling Management through the WAN Port You can enable access to Configuration Manager via the WAN port so that the ISP can perform configuration tasks. To enable WAN access, display the Management Control page by clicking Management Control in the Admin tab.

  • Page 157: Configuring Snmp

    Configuring SNMP The Simple Network Management Protocol (SNMP) enables a host computer to access configuration, performance, and other system data that resides in a database on the modem. The host computer is called a management station and the modem is called an SNMP agent.

  • Page 158: Adding Hosts To Communities

    ADSL2+ Router User’s Guide 3. From the Access column of the table, select the privileges (Read-Only or Read/Write) to assign to all hosts that are part of this community. 4. Click A page displays briefly to confirm your changes, and then the SNMP Configuration page redisplays with the new entry.

  • Page 159: Monitoring System Status And Performing Diagnostics

    Monitoring System Status and Performing Diagnostics This chapter shows you where to find information related to system events (alarms) and DSL line performance, and how to run a diagnostic program to troubleshoot problems. Viewing System Alarms You can use the Configuration Manager to view information about alarms that occur in the system.

  • Page 160: Viewing The System Log

    ADSL2+ Router User’s Guide Viewing the System Log You can view data generated or acquired by routine system communication with other devices, such as the results of negotiations with the ISP’s computers for DNS and gateway IP addresses. This information does not necessarily represent unexpected or improper functioning and is not captured by the system traps that create alarms.

  • Page 161: Viewing Dsl Information

    Viewing DSL Information To view configuration parameters and performance statistics for the ADSL2+ Router’s DSL line, log into Configuration Manager, and then click the WAN tab. The DSL Status page displays by default: Figure 74. DSL Status Page The DSL Status page displays current information on the DSL line performance.
  • Page 162 ADSL2+ Router User’s Guide Figure 75. DSL Parameters Page „ The DSL Parameters and Status table displays settings preconfigured by the product manufacturer or your ISP. „ The Config Data table lists various types of error and defects measurements found on the DSL line.
  • Page 163 The DSL Statistics page reports error data relating to the last 15- minute interval, the current day, and the previous day. At the bottom of the page, the Detailed Interval Statistic table displays links you can click on to display detailed data for each 15- minute interval in the past 24 hours.

  • Page 164: Using Diagnostics

    ADSL2+ Router User’s Guide Using Diagnostics The diagnostics feature executes a series of test of your system software and hardware connections. Use this feature when working with your ISP to troubleshoot problems. Running the Diagnostics Program Follow these instructions to begin the diagnostics program: 1.

  • Page 165: Using The Ping Utility

    Using the Ping Utility Ping is a command you can use to check whether your PC can recognize other computers on your network and the Internet. A ping command sends a message to the computer you specify. If the computer receives the message, it sends messages in reply. To use ping, you must know the IP address or domain name of the computer you want to communicate with.

  • Page 166: Using The Traceroute Utility

    You can use the traceroute utility to view the IP addresses of all the hops that an IP packet makes from the ADSL2+ Router on its way to an Internet destination. You can use the results of a traceroute to determine where a delay or transmission error is occurring.
  • Page 167 The results display in the window at the bottom of the page and include the IP address of each router or computer reached, from the first to last hop, and the access time for each packet sent.

  • Page 168: Upgrading The Software And Storing And Restoring The Configuration Data

    Upgrading the Software and Storing and Restoring the Configuration Data All system software is contained in a single file, called an image. The image is stored in system flash memory and contains the operating system, device drivers, application code, and configuration data.

  • Page 169: Uploading An Image Stored Remotely

    4. Select the file, and then click The following message box displays at the bottom of the page: Please do not interrupt the upgrade process. A status page will appear automatically when loading is completed (about 1 minute). When loading is complete, the following message displays (the file name may differ): File: TEImage.bin successfully saved to flash.

  • Page 170: Storing And Restoring Configuration Settings

    Configuration Manager. Storing and Restoring Configuration Settings Many of theADSL2+ Router’s software features, such as those documented in this User’s Guide, can be configured in various ways to address your needs or your ISP’s requirements. This configuration data becomes part of the software image.
  • Page 171 „ To save the current configuration, click A Windows dialog box will display to enable you to choose where to save the file. The file is named commitedcfg.cfg and can be opened with any text editor. You can change the file name to identify the date or characteristics of the configuration;...

  • Page 172: Modifying Port Settings

    Routers use the port number along with the IP addresses to forward the packet to its intended recipient. For example, all IP data packets that the ADSL/Ethernet router receives from the Internet specify the same IP address (your public IP address) as the destination.
  • Page 173 Thereafter, when your ISP wants to log on to your Configuration Manager, they would type your IP address in their browser, followed by a colon and the non-standard port number, as shown in this example: http://10.0.1.16:61000 Your ISP may also have special circumstances that require changing the port numbers;...

  • Page 174: Configuring Autodetect

    Autodetect searches for these interfaces in the order stated. Depending on the interface detected, Autodetect creates a PPP, an EoA, or an IPoA interface on the modem. In this mode, the modem is expected to be configured as a router.

  • Page 175: Configuring Autodetect

    Configuring Autodetect Follow these steps to configure Autodetect: 1. Log into Configuration Manager, click the Admin tab and Autodetect then click to display the Autodetect page: Figure 85. Autodetect Page 2. Select the appropriate Autodetect mode of operation, as described in the previous section, from the Autodetect Mode drop-down list.

  • Page 176: Ip Addresses, Network Masks, And Subnets

    IP Addresses, Network Masks, and Subnets IP Addresses This section pertains only to IP addresses for IPv4 (version 4 of the Internet Protocol). IPv6 addresses are not covered. Note IP addresses, the Internet's version of telephone numbers, are used to identify individual nodes (computers or devices) on the Internet. Every IP address contains four numbers, each from 0 to 255 and separated by dots (periods), e.g.

  • Page 177: Network Classes

    Network classes The three commonly used network classes are A, B, and C. (There is also a class D but it has a special use beyond the scope of this discussion.) These classes have different uses and characteristics. Class A networks are the Internet's largest networks, each with room for over 16 million hosts.
  • Page 178 ADSL2+ Router User’s Guide Note uses the remaining 7 bits in field4 for its host IDs, which range from 0 to 127 (instead of the usual 0 to 255 for a class C address). Similarly, to split a class C network into four subnets, the mask is: 255.255.255.192 or 11111111.

  • Page 179: Troubleshooting

    ISP. Verify that the Ethernet cable is securely connected to your LAN hub or PC and to the ADSL2+ Router. Make sure the PC and/or hub is turned on. Verify that you are using a straight-through type Ethernet cable to the uplink port on a hub or a cross- over type cable to a stand-alone PC.
  • Page 180 If you specified that the DNS server be assigned dynamically from a server, then verify with your ISP that the address configured on the ADSL2+ Router is correct, then You can use the ping utility, described on page 165, to test connectivity with your ISP’s DNS server.

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