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  Netopia 3341 ADSL Router Topics

  • Configuring Bridge Mode
  • Configuring Pinholes/Port Forwarding

  • Configuring for Bridge Mode
    Before proceeding, be aware of the following:
  • By placing your DSL router in bridge mode, you are foregoing the basic firewall protection that the Comtrend router provides while in router mode.
  • By placing your DSL router in bridge mode, you will be required to configure PPPoE (PPP over Ethernet) on the device you are directly connecting to the DSL modem. For instance if you are using a wireless router, you will need to configure it's WAN port to authenticate via PPPoE. If you are connecting a PC directly to the DSL modem, you will need to use PPPoE software on your PC to authenticate.
  • By placing your DSL router in bridge mode, only 1 device may be directly attached to the DSL modem. In order to use more than 1 computer through the modem a additional router will be required which will be the 1 device plugged directly into the modem.

  • Before you start, make sure of the following:
  • Unplug the phone line from the modem while doing this and plug it back in once your modem is in bridge mode.
  • Reset the modem back to factory defaults by holding the small button on the back of the modem for about 10 seconds while the modem is powered up.
  • You are successfully able to log into the modem.

  • 1) From a web browser, go to "". Login with the username "admin" and the password "admin".

    2) Click on the "Home" tab on the top left side of the web page.

    3) Click on the "Expert Mode" link in the left column. If prompted by the "Expert Mode Confirmation" window, click on the "OK" button.

    4) Click on the "Configure" link in the left column.

    5) Click on the "LAN" link.

    6) Enter the following information under the "LAN IP Interface" section:
    • Enable Interface is checked
    • IP Address is
    • IP Netmask is
    • Restrictions is set to None
    Click on the "Submit" button.

    7) In the box labeled "Other LAN Options", click on the "DHCP Server" link.

    8) In the box labeled "DHCP Server", the the "Server Mode" to "Off" and click the "Submit" button.

    9) Click on the "Configure" link at the top of the page.

    10) Click on the "Advanced" link.

    11) Under the "Services" heading, click the "Ethernet Bridge" link.

    12) Checkmark the "Enable Bridging on Port" box and click on the "Submit" button.

    13) Click on the "Configure" link at the top of the page.

    14) Click the "WAN" link.

    15) In the box labeled "WAN IP Interfaces", click the "PPP over Ethernet vcc1" link.

    16) In the box labeled "WAN IP Interface - (PPP over Ethernet vcc1)", remove the checkmark for "Enable Interface" and click on the "Submit" button.

    17) Click the "WAN" link.

    18) In the box labeled "IP Gateway", remove the checkmark for "Enable Gateway Option" and click on the "Submit" button.

    19) Click on the "Configure" link at the top of the page.

    20) Click on the yellow triangle in the upper right corner.

    21) Click on the "Save and Restart" link.

    Your DSL Router is now in Bridge Mode.

    NOTE: At this point, assuming you were using DHCP to obtain your IP address while you made these changes, you may loose connectivity to the modem. This is fine since we're done, but if you need to access the router at a future date, you can manually assign the IP address with the Netmask of to your computer to then access the Netopia at

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    Configuring Pinholes/Port Forwarding
  • Before you begin you must know the IP of the computer you wish to forward the inbound port traffic to. This guide assumes the modem is using it's default IP address and admin settings.

  • 1) From a web browser, go to "". Login with the username "admin" and the password "admin".
    2) Click the "Expert Mode" link on the left.

    3) Click on "OK" if you are warned about entering Expert Mode.

    4) Click on the "Configure" link on the left.

    5) Click on "Advanced" link.

    6) Click on the "Pinholes" link.

    7) Click the "Add" button.

    8) Enter a name to identify this pinhole, select the type of protocol, the starting external port, the ending external port, the internal IP of the PC/system you wish to be remotely accessed, and the internal port number. Then click "Submit".

    9) In the example below, SSH (secure shell, port 22) will be forwarded to a computer with the IP address of

    10) Once submitted, a notification that the configuration database has been changed. Click on the yellow Alert button on the upper right hand side of the page.

    11) Click on the "Save and Restart" link.

    12) Router will reboot and once synced, will start forward all in-bound internet traffic for the specified port to the specified IP address.

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