Consumers - SBG6580: Port Forwarding Setup
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SBG6580: Port Forwarding Setup

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Information

 
Question
How do I configure the SBG6580 Cable Gateway for port forwarding?
Answer

Port Forwarding allows the option to run a publicly accessible server on the LAN by specifying the mapping of TCP / UDP ports to a local device. This enables incoming requests on specific port numbers to reach devices such as Web Servers, Mail Servers, and Digital Video Recorders (DVR).

This document contains the following sections:

NOTE 1: If a port forwarding entry has been created, and it is desired to disable it, skip down to the Disabling a Port Forwarding entry section.

NOTE 2: It is recommended to manually configure the TCP / IP settings on the server that will be remotely accessible. If this is done, then it is mandatory to configure the following settings:

  • IP address
  • Subnet mask
  • Default gateway
  • At least one DNS address


If the following settings are configured without the default gateway, remote access to the server will not be available, as it will only be accessible from the local network.

NOTE 3: When manually configuring the TCP / IP settings on a device, make sure that the DHCP pool in the SBG6580 doesn't include the IP address of the server. To verify or to adjust the DHCP pool, please refer to Answer # 20838 - SBG6580: LAN Options Setup.

NOTE 4: If the firewall is set to High or Medium, port forwarding feature will be inoperable.  The firewall needs to be set to Low to function.


Creating and enabling a Port Forwarding entry

  1. Launch a web browser, such as Internet Explorer, Firefox, or Safari. Enter http://192.168.0.1 into the address box.

    NOTE: By default the LAN IP address is 192.168.0.1.  If the default address has been changed, enter the custom address in the address box.

  2. Enter admin in the Username field.
  3. Enter motorola in the Password field.
  4. Click the Login button. The Status page appears.

    Image 
     
  5. Click the Advanced link on top of the screen.
  6. Click the Forwarding button in the left-hand menu.
  7. In the Port Forwarding menu:

    a.   Local IP Address - Enter the IP address of the server.

    b.   Start Port:
         
    1.   If one port needs to be forwarded, enter the port number.
          2.   If a range of ports need to be forwarded, enter the first number of the range.

    c.   End Port:
         
    1.   If one port needs to be forwarded, enter the same port number that was entered as the Start Port.
          2.   If a range of ports need to be forwarded, enter the last number of the range.

    d.   Protocol - Click on the drop-down menu and select the appropriate protocol (TCP, UDP, or Both).
    e.   Enabled - Click this checkbox to enable the gateway to forward the ports entered in this entry.
     
  8. Click the Apply button.

    NOTE: The example below shows two port forwarding entries: One for a single port (407), and the other for a range of ports (1417-1420).

    Image


Disabling a Port Forwarding entry

  1. Launch a web browser, such as Internet Explorer, Firefox, or Safari. Enter http://192.168.0.1 into the address box.

    NOTE: By default the LAN IP address is 192.168.0.1.  If the default address has been changed, enter the custom address in the address box.

  2. Enter admin in the Username field.
  3. Enter motorola in the Password field.
  4. Click the Login button.  The Status page appears.

    Image 
     
  5. Click the Advanced link on top of the screen.
  6. Click the Forwarding button in the left-hand menu.
  7. In the Port Forwarding menu, uncheck the Enabled box for the desired entry.
  8. Click the Apply button.

    NOTE: In the example below, the port forwarding entry for 407 has been disabled. Any incoming traffic with a port destination of 407 will no longer be forwarded by the SBG6580, but will now be discarded. The SBG6580 will continue to forward any incoming traffic with a destination port ranging from 1417 - 1420 to the IP address of 192.168.0.2.

    Image

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