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DQ Technology 202ER User Manual

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VisionNet
VisionNet
VisionNet
VisionNet
202ER ADSL Ethernet Router
User's Manual
Revision 1.1
February 27, 2003

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Summary of Contents for DQ Technology 202ER

  • Page 1 VisionNet VisionNet VisionNet VisionNet 202ER ADSL Ethernet Router User’s Manual Revision 1.1 February 27, 2003...
  • Page 2 System Requirements ............9 Using this Document............10 Notational conventions ..........10 Typographical conventions .......... 10 Special messages............10 Getting to Know the VisionNet 202ER ..... 11 Parts Check ................11 Front Panel ................12 Rear Panel................13 Quick Start ............15 Part 1 —...

  • Page 3: Table Of Contents

    Setting the LAN IP Address ......39 Configuring the LAN IP Address......... 39 Viewing System IP Information and Performance Statistics ........43 Viewing the VisionNet 202ER’s IP addresses ....43 Viewing IP Global Statistics..........44 Configuring Dynamic Host Configuration Protocol............45 Overview of DHCP...............
  • Page 4 VisionNet 202ER ADSL Ethernet Router User’s Guide Configuring DHCP Server ........... 47 Viewing, modifying, and deleting address pools, and excluding IP addresses from a pool................50 Viewing current DHCP address assignments .... 50 Configuring DHCP Relay............. 52 Setting the DHCP Mode ............53 Configuring Network Address Translation..
  • Page 5 VisionNet 202ER ADSL Ethernet Router User’s Guide Do I need to define IP routes? ........78 Viewing the IP Routing Table..........79 Adding IP Routes ..............81 Configuring the Routing Information Protocol............89 RIP Overview ............... 89 When should you configure RIP?........ 89 Configuring the VisionNet 202ER’s Interfaces with...
  • Page 6 VisionNet 202ER ADSL Ethernet Router User’s Guide Overview of Bridges............109 Using the Bridging Feature..........110 Defining Bridge Interfaces ..........111 Deleting a Bridge Interface..........112 Configuring Firewall Settings ......113 Configuring Global Firewall Settings.........113 Managing the Black List ............116 Configuring IP Filters........117 Overview................117...
  • Page 7 VisionNet 202ER ADSL Ethernet Router User’s Guide Diagnosing Problem using IP Utilities.......139 ping ................139 nslookup ..............140 Glossary............141 FCC Compliance Statements NOTE : This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

  • Page 9: 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 VisionNet 202ER via the LAN port. This chapter describes how to use the Configuration Manager.
  • Page 10 VisionNet 202ER ADSL Ethernet Router User’s Guide Figure 7. Login Screen 2. Enter your user name and password, and then click 3. The first time you launch the program, use these defaults: Default User Name: admin Default Password : visionnet You can change the password at any time (see Changing Your Login Password on page 35).

  • Page 11: Functional Layout

    VisionNet 202ER ADSL Ethernet Router User’s Guid 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, except for the Home tab which displays when you first log in, displays the available tasks horizontally the top of the page.

  • Page 12: The Home Tab And System View Table

    VisionNet 202ER ADSL Ethernet Router User’s Guide The Home Tab and System View Table The Home Tab displays the System View table when you first access the program: Figure 8. System View Page The System View table provides a snapshot of your system configuration, and provides links to the software pages that enable you to configure each setting (if available).
  • Page 13 VisionNet 202ER ADSL Ethernet Router User’s Guid Table Heading Description LAN Interfaces Displays the software names and various settings for the device interfaces that communicate directly with your network. These typically include at least one Ethernet interface, named eth-0, and may include a USB interface named usb-0.

  • Page 14: Changing The System Date And Time

    Changing the System Date and Time The device keeps a record of the current date and time, which it uses to calculate and report various performance data. Changing the VisionNet 202ER date and time does not affect the date and time on your PCs. Note Follow these instructions to change the date and time: 1.

  • Page 15: Changing Your Login Password

    VisionNet 202ER ADSL Ethernet Router User’s Guid Changing Your Login Password The first time you log into the Configuration Manager, you use the default user ID and password (root and root). The system allows only one user ID and password. Only the password can be changed.

  • Page 16: Committing Your Changes And Rebooting The Device

    VisionNet 202ER ADSL Ethernet Router User’s Guide Committing Your Changes and Rebooting the Device Committing your changes Whenever you use the 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 17: Rebooting The Device Using Configuration Manager

    ISP or the manufacturer. Choosing this option erases any custom settings. Do not reboot the device using the Reset button on the back panel of the VisionNet 202ER to activate new changes. This button resets the device settings to the manufacturer’s default values. WARNING...

  • Page 18: Setting The Lan Ip Address

    PCs on your LAN. A network node can be thought of as any port on the network, such as the VisionNet 202ER’s LAN port and the network interface cards on your PCs. See Appendix A for an explanation of Definition subnets..
  • Page 19 VisionNet 202ER ADSL Ethernet Router User’s Guide Follow these steps to change the default LAN IP address or to configure the LAN port as a DHCP client. 1. Launch Configuration Manager, and then click the LAN Config. The LAN Configuration page displays, as shown in Figure 12.
  • Page 20 LAN IP information assigned dynamically from another DHCP server already configured on your network. The VisionNet 202ER cannot act as a DHCP server for its own LAN port. 2. Enter a LAN IP address and network mask, or click the DHCP Enable radio button.
  • Page 21 VisionNet 202ER ADSL Ethernet Router User’s Guide referred to as a "Configured IP Address" in the program. If the configured IP address is not available from the DHCP server, the server will distribute another address to the LAN port. Even if another number is assigned, the same configured IP address will continue to display in this field.

  • Page 22: Viewing System Ip Information And Performance Statistics

    VisionNet 202ER ADSL Ethernet Router User’s Guide Viewing System IP Information and Performance Statistics The interfaces on the VisionNet 202ER that communicate with other network and Internet devices are identified by unique Internet protocol (IP) addresses. You can use the Configuration Manager to view the list of IP addresses that your device uses, and to view other system and network performance data.

  • Page 23: Viewing Ip Global Statistics

    VisionNet 202ER ADSL Ethernet Router User’s Guide Viewing IP Global 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 24: Configuring Dynamic Host Configuration Protocol

    When you enable DHCP on a network, you allow a device — such as the VisionNet 202ER 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 25: Visionnet 202Er Dhcp Modes

    If you have another PC or device on your network that is already performing the DHCP server function, then you can configure the LAN port on the VisionNet 202ER to be a DHCP client of that server (as are your PCs). This configuration is not discussed in this chapter.

  • Page 26: Configuring Dhcp Server

    VisionNet 202ER ADSL Ethernet Router User’s Guid Configuring DHCP Server By default, the device is configured as a DHCP server, with a predefined IP address pool of 10.0.0.4 through 10.0.0.15 (subnet mask 255.255.255.0). To change this range of addresses, see Note “Viewing, modifying, and deleting address pools”...
  • Page 27 VisionNet 202ER ADSL Ethernet Router User’s Guide Figure 16. DHCP Server Pool – Add Page...
  • Page 28 VisionNet 202ER ADSL Ethernet Router User’s Guid 4. The Start IP Address, End IP Address, Net Mask, and Gateway Address fields are required; the others are optional. Field Description Start/End IP Specify the lowest and highest addresses in Addresses the pool.

  • Page 29: Viewing, Modifying, And Deleting Address Pools, And Excluding Ip Addresses From A Pool

    Be sure to use the Commit feature to save your changes to permanent memory, as described on page 36. Viewing current DHCP address assignments When the VisionNet 202ER functions as a DHCP server for your LAN, it keeps a record of any addresses it has leased to your...
  • Page 30 VisionNet 202ER ADSL Ethernet Router User’s Guid computers. To view a table of all current IP address assignments, display the DHCP Server Configuration page, and then click A page displays similar to the on shown in Figure 18: Figure 18. DHCP Server Address Table Page The DHCP Server Address Table lists any IP addresses that are currently leased to LAN devices.

  • Page 31: 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 VisionNet 202ER contacts your ISP to obtain an IP address (and other information), and then forwards that information to the computer.

  • Page 32: Setting The Dhcp Mode

    VisionNet 202ER ADSL Ethernet Router User’s Guid A page displays to confirm your changes, and then the program returns to the DHCP Relay Configuration page. 6. Follow the instructions in “Setting the DHCP Mode” on page 53 to set the DHCP mode to DHCP Relay.

  • Page 34: 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 7.) On the VisionNet 202ER, 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...

  • Page 35: Your Default Nat Setup

    VisionNet 202ER ADSL Ethernet Router User’s Guide disguised source port number. The VisionNet 202ER 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 36: Viewing Nat Global Settings And Statistics

    VisionNet 202ER ADSL Ethernet Router User’s Guid assigned to your computers (see “Adding NAT Rules” on page 63 for instructions). Viewing NAT Global Settings and Statistics To view your NAT settings, launch the Configuration Manager, Click NAT in the Virtual Server tab. The NAT Configuration page displays by default, as shown in Figure 20.
  • Page 37 VisionNet 202ER ADSL Ethernet Router User’s Guide The NAT Global Information table contains the following fields: Field Description TCP Idle Timeout (sec) For a NAT translation session on data that uses the TCP protocol, the translation will no longer be performed if no matching data packets are received after the specified time has elapsed.
  • Page 38 VisionNet 202ER ADSL Ethernet Router User’s Guid Figure 21. 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 39: Viewing Nat Rules And Rule Statistics

    VisionNet 202ER ADSL Ethernet 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, as shown in Figure 22.

  • Page 40: Viewing Current Nat Translations

    VisionNet 202ER ADSL Ethernet Router User’s Guid 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, as shown in Figure 24: Figure 24.
  • Page 41 VisionNet 202ER ADSL Ethernet Router User’s Guide Figure 25. 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 42: Adding Nat Rules

    VisionNet 202ER ADSL Ethernet Router User’s Guid Adding NAT Rules This section explains how to create rules for the various NAT flavors. You cannot edit existing NAT rules. To change a rule setup, delete it and add a new rule with the modified settings.

  • Page 43: Quick Start

    VisionNet 202ER ADSL Ethernet Router User’s Guide higher priority rules are invoked before lower-priority rules. It is recommended that you select rule IDs as multiples of 5 so that, in the future, you can insert a rule between two existing rules.

  • Page 44: 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 71), the VisionNet 202ER blocks attempts by external computers to access your LAN computers. Note...
  • Page 45 VisionNet 202ER ADSL Ethernet Router User’s Guide Figure 27. NAT Rule – Add Page (rdr Flavor) Follow these instructions to add an rdr rule (see steps 1-4 under "The napt rule" on page 63 for specific instructions corresponding to steps 1 and 2 below): 1.
  • Page 46 VisionNet 202ER ADSL Ethernet Router User’s Guid If you have multiple WAN (PPP) interfaces, this rule will not be enforced for data that arrives on other PPP interfaces. This rule will not be enforced for data that arrives on WAN interfaces not specified here.

  • Page 47: The Basic Rule: Performing 1:1 Translations

    VisionNet 202ER ADSL Ethernet 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 48: The Filter Rule: Configuring A Basic Rule With Additional Criteria

    VisionNet 202ER ADSL Ethernet Router User’s Guid You can create a basic rule for each specific address translation to occur. The range of addresses should correspond to private addresses already in use on your network, whether assigned statically to your PCs, or assigned dynamically using DHCP.
  • Page 49 VisionNet 202ER ADSL Ethernet Router User’s Guide 1. Display the NAT Rule – Add Page, select FILTER as the Rule Flavor, and enter a Rule ID. 2. Select the interface on which this rule will be effective. 3. Select a protocol to which this rule applies, or choose ALL.

  • Page 50: 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 VisionNet 202ER 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 51: The Pass Rule: Allowing Specific Addresses To Pass Through Untranslated

    VisionNet 202ER ADSL Ethernet Router User’s Guide 4. In the Global Address field, type the address that you want to serve as the publicly known address for the LAN computer. 5. Follow steps 7-12 under "The napt rule" on page 63 to submit your changes.

  • Page 52: Configuring Dns Server Addresses

    VisionNet 202ER ADSL Ethernet Router User’s Guide Configuring DNS Server Addresses About DNS Domain Name System (DNS) servers map the user-friendly domain names that users type into their Web browsers (e.g., "yahoo.com") to the equivalent numerical IP addresses that are used for Internet routing.

  • Page 53: Configuring Dns Relay

    LAN port to a DNS server at the ISP. It then relays the response to the PC. When performing DNS relay, the VisionNet 202ER must maintain the IP addresses of the DNS servers it contacts. It can learn these...
  • Page 54 VisionNet 202ER ADSL Ethernet Router User’s Guid the WAN tab, and then click DNS in the task bar. The DNS Configuration page displays. Type the IP address of the DNS server in an empty row and click You can enter only two addresses.

  • Page 56: Configuring Ip Routes

    VisionNet 202ER ADSL Ethernet Router User’s Guide Configuring IP Routes You can use Configuration Manager to define specific routes for your Internet and network data. This chapter describes basic routing concepts and provides instructions for creating routes. Note that most users do not need to define IP routes.

  • Page 57: Hops And Gateways

    Most users do not need to define IP routes. On a typical small home or office LAN, the existing routes that set up the default gateways for your LAN computers and for the VisionNet 202ER provide the most appropriate path for all your Internet traffic.

  • Page 58: 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 VisionNet 202ER’s routing table, the System Status tab, Routing Table and then click in the task bar.
  • Page 59 VisionNet 202ER ADSL Ethernet Router User’s Guide The following table defines the fields in the IP Routing Table. Table 3. IP Routing Table Fields Field Description Destination Specifies the IP address of the destination computer. The destination can specified as the IP address of a specific computer or an entire network.

  • Page 60: Adding Ip Routes

    VisionNet 202ER ADSL Ethernet Router User’s Guid 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, as shown in Figure 33.

  • Page 62: 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 VisionNet 202ER, 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 63: Configuring The Visionnet 202Er's Interfaces With Rip

    Configuring the VisionNet 202ER’s Interfaces with RIP The following instructions describe how to enable RIP on the VisionNet 202ER. In order for the VisionNet 202ER to communicate with other devices using RIP, you must also enable the other devices to use Note the protocol.
  • Page 64 The Receive Mode setting indicates the RIP version(s) in which information must be passed to the VisionNet 202ER in order for it to be accepted into its routing table.

  • Page 65: Viewing Rip Statistics

    VisionNet 202ER ADSL Ethernet 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 VisionNet 202ER. Figure 35. RIP Global Statistics Page...

  • Page 66: Configuring The Atm Vcc

    Ethernet protocol performs on your LAN. This chapter describes how to configure the ATM virtual channel (VC). The VC properties define the path the VisionNet 202ER uses to communicate with your ISP over the ATM network. Viewing Your ATM VC Setup...

  • Page 67: Adding Atm Vcs

    VisionNet 202ER ADSL Ethernet Router User’s Guide The ATM VCC Configuration table displays the following fields (contact your ISP to determine these settings): Field Description Interface The name of the lower-level interface on which this VC operates. The low-level interface names are preconfigured in the software and identify the type of traffic that can be supported, such as data or voice.
  • Page 68 VisionNet 202ER ADSL Ethernet Router User’s Guide 2. Select an interface name from the VCC Interface drop-down list. 3. Enter the VPI and VCI values assigned by your ISP, and select the mux type from the drop-down list. 4. Click 5.

  • Page 69: Modifying Atm Vcs

    VisionNet 202ER ADSL Ethernet Router User’s Guide Modifying ATM VCs Your device may already be preconfigured with the necessary ATM VC properties, or the table may contain placeholder values that you must change before using the device. Contact your ISP to determine your ATM VC values.

  • Page 70: Configuring Ppp Interfaces

    PPP is configured as a group of software settings associated with the ADSL port. Although the device has only one physical ADSL port, the VisionNet 202ER can be defined with more than one group of PPP settings. Each group of settings is called a PPP interface...
  • Page 71 VisionNet 202ER ADSL Ethernet Router User’s Guide You can configure the following settings on the PPP Configuration page: Inactivity TimeOut (mins): The time in minutes that must elapse before a PPP connection times out due to inactivity. Ignore WAN to LAN traffic: When enabled, data traffic traveling in the incoming direction—from the WAN port to...

  • Page 72: Viewing Ppp Interface Details

    VisionNet 202ER ADSL Ethernet Router User’s Guide Field Description Use DHCP When set to Enable, the device will acquire additional IP information from the ISP's DHCP server. The PPP connection itself acquires the device's IP address, mask, DNS address, and default gateway address.
  • Page 73 VisionNet 202ER ADSL Ethernet Router User’s Guide Figure 40. PPP – Detail Page In addition to the properties defined on page 92, the PPP Interface – Detail table displays these fields: Field Description Status Indicates whether the interface has been specified in the...
  • Page 74 VisionNet 202ER ADSL Ethernet Router User’s Guide Field Description Last Fail Cause Indicates the action that ended the previous PPP session: No Valid PADO Recvd: The unit initiated a PPoE handshake but did not receive a packet in reply from the ISP.

  • Page 75: Adding A Ppp Interface Definition

    VisionNet 202ER ADSL Ethernet Router User’s Guide Adding a PPP Interface Definition If you intend to use more than one type of service from your ISP, the device may be configured with multiple PPP interfaces, each with unique logon and other properties. Follow this procedure to define properties for a PPP interface: 1.

  • Page 76: Modifying And Deleting Ppp Interfaces

    VisionNet 202ER ADSL Ethernet Router User’s Guide 4. Click to return to the PPP page and view the new interface in the table. Save and Reboot 5. Click in the Save Setting tab. 6. Click to save your changes to permanent memory.

  • Page 77: Using The Bridging Feature

    Using the Bridging Feature Although the VisionNet 202ER is preconfigured to serve as a router for providing Internet connectivity to you LAN, there are several instances in which you may also want to configure bridging: Your ISP may use protocols that require bridging with your LAN.

  • Page 78: Defining Bridge Interfaces

    VisionNet 202ER ADSL Ethernet Router User’s Guide. Defining Bridge Interfaces To enable bridging, you simply specify the device interfaces on which you want to bridge data, and then enable bridging mode: 1. Launch Configuration Manager and click the Bridging in the WAN tab.

  • Page 79: Deleting A Bridge Interface

    VisionNet 202ER ADSL Ethernet Router User’s Guide If you enable bridging on an interface that has already been assigned an IP address, then it is considered IP-enabled and will route (rather than bridge) IP packets received on the interface. The interface will bridge non-IP data it receives, however.

  • Page 80: Configuring Firewall Settings

    VisionNet 202ER ADSL Ethernet Router User’s Guide Configuring Firewall Settings Configuration Manager provides built-in firewall functions, enabling you to protect the system against denial of service (DoS) attacks and other types of malicious accesses to your LAN. You can also specify how to monitor attempted attacks, and who should be automatically notified.

  • Page 81: Managing The Black List

    VisionNet 202ER ADSL Ethernet Router User’s Guide 2. Configure any of the following settings that display in the Firewall Global Information table: Field Description Black List Status If you want the device to maintain and use a black list, click Enable. Click Disable if you do not want to maintain a list.
  • Page 82 VisionNet 202ER ADSL Ethernet Router User’s Guide. 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 Ethernet to (Trace) or can e-mailed to specified administrators.
  • Page 83 VisionNet 202ER ADSL Ethernet Router User’s Guide Managing the Black List 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 84: Configuring Ip Filters

    LAN. When you define an IP filter rule and enable the feature, you instruct the VisionNet 202ER to examine each data packet it receives to determine whether it meets criteria set forth in the rule. The criteria...

  • Page 85: Configuring Ip Filter Global Settings

    VisionNet 202ER ADSL Ethernet Router User’s Guide description of the items that make up a rule. When rules are defined, you can use the icons that display in the Actions column to ( delete ( ), and view details on ( ) the corresponding rule.

  • Page 86: Creating Ip Filter Rules

    VisionNet 202ER ADSL Ethernet 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, and refer to the examples on page 124 for assistance: 1.
  • Page 87 LAN. Interface Specifies the interface on the VisionNet 202ER on which the rule will take effect. See the examples on page 124 for suggestions on choosing the appropriate interface for various rule types.
  • Page 88 VisionNet 202ER ADSL Ethernet Router User’s Guide. Field Description Black List Status Specifies whether or not a violation of this rule will result in the offending computer's IP address being added to the Black List, which blocks the ADSL/Ethernet router from forwarding packets from that source for a specified period of time.
  • Page 89 VisionNet 202ER ADSL Ethernet Router User’s Guide Field Description Protocol Specifies 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...
  • Page 90 VisionNet 202ER ADSL Ethernet Router User’s Guide. Field Description ICMP Code Specifies whether the value in the code field in ICMP packet headers will be used as a criteria. The code value can be any decimal value from 0-255. You can specify that the...
  • Page 91 Figure 51 on page 119 shows the configuration for this rule. The specified computer will not be able to access the Web, but will be able to access FTP Internet sites (and any others that use destination port numbers other than 80). Example 2. Blocking Telnet accesses to the VisionNet 202ER:...
  • Page 92 VisionNet 202ER ADSL Ethernet Router User’s Guide. 1. Add a new rule for incoming packets incoming on the ppp-0 interface. 2. Specify that the packet must contain the TCP protocol, and must be destined for port 23, the well-known port number used for the Telnet protocol.

  • Page 93: Viewing Ip Filter Statistics

    VisionNet 202ER ADSL Ethernet Router User’s Guide Viewing IP Filter Statistics For each rule, you can view statistics on how many packets were accepted or denied. Display the IP Filter Configuration page, and then click in the corresponding row corresponding to the rule.

  • Page 94: Ip Addresses

    VisionNet 202ER ADSL Ethernet Router User’s Guide. The IP Filter Session table displays the following fields for each current IP session: Field Description 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).

  • Page 96: Troubleshooting

    Use the ping utility, discussed in the following Configuration Manager section, to check whether your PC can communicate program from your with the VisionNet 202ER’s LAN IP address (by browser. default 10.0.0.2). If it cannot, check the Ethernet cabling. Verify that you are using Internet Explorer v5.0 or later, or Netscape Navigator v6.2 or later.
  • Page 97 “Request timed out.” Using the ping command, you can test whether the path to the VisionNet 202ER is working (using the preconfigured default LAN IP address 10.0.0.2) or another address you assigned. You can also test whether access to the Internet is working by typing an external address, such as that for www.yahoo.com...
  • Page 98 VisionNet 202ER ADSL Ethernet Router User’s Guide nslookup You can use the nslookup command to determine the IP address associated with an internet site name. You specify the common name, and the nslookup command looks up the name in on your DNS server (usually located with your ISP).

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