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SBG6900-AC (v1.5.x): Bridge Mode Setup

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Question
What should I know about enabling / disabling NAPT mode in the SBG6900-AC? 
Answer
By default, the SBG6900-AC operates as a gateway, and provides Internet access for multiple devices (up to 245 devices), connecting to the SBG6900-AC gateway.  When operating as a gateway, the SBG6900-AC serves as a modem and a router and keeps the devices in the Local Area Network (LAN) hidden.  In certain situations, it may be desired to disable the router function of the SBG6900-AC, and have it operate as a modem only.  This can be accomplished by configuring the SBG6900-AC for Bridge Mode.  When Bridge Mode is enabled, the router function is turned off and the device directly connected to the SBG6900-AC will receive the Public IP address from the Cable Provider.  This document describes how to enable and disable Bridge Mode. 

This document contains the following sections:
NOTE: Although the SBG6900-AC does not route traffic when Bridge Mode is enabled, it can still act as a firewall if the firewall settings in the SBG6900-AC are enabled.

This is an ideal setup when:
  • Adding a firewall, router or another NAT device to manage the Local Area Network
  • Hosting services or applications that can benefit from being directly accessible from the Internet

 

To Enable Bridge Mode

  1. Launch a web browser, such as Internet Explorer, Firefox, or Safari. Enter http://192.168.0.1 into the address box, and press the Enter key.  The Login page appears.

    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.

    Right click on the image to save it to your computer.

     
  2. On the Login page, enter admin in the Username field.
  3. Enter password in the Password field.
  4. Click the Login button. The Home page appears.

    Right click on the image to save it to your computer.

     
  5. Move the mouse-cursor over Basic on the top menu, and click the Setup link from the drop-down submenu.  The Basic - Setup page appears. 
  6. On the Basic - Setup page, Gateway Mode - Click on the drop-down, and select Bridged.
  7. Click the Apply button.  The SBG6900-AC will restart.

    Right click on the image to save it to your computer.

     
  8. Click the Reload link to get back to the login page.

    Image

     
The SBG6900-AC has now been configured with NAPT mode disabled. Make sure that the devices that are able to receive a public IP address and directly connected to the SBG6900-AC's Ethernet ports. These devices will also need to be configured to obtain an IP address automatically.

To configure a Windows or Macintosh device to obtain an IP address automatically, please refer to the Answer link below. For all other devices, please contact the manufacturer.


To Disable Bridge Mode

  1. Launch a web browser, such as Internet Explorer, Firefox, or Safari. Enter http://192.168.100.1 into the address box, and press the Enter key.  The Login page appears.

    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.

    Right click on the image to save it to your computer.

     
  2. On the Login page, enter admin in the Username field.
  3. Enter password in the Password field.
  4. Click the Login button. The Home page appears.

    Right click on the image to save it to your computer.

     
  5. Move the mouse-cursor over Basic on the top menu, and click the Setup link from the drop-down submenu.  The Basic - Setup page appears. 
  6. On the Basic - Setup page, Gateway Mode - Click on the drop-down, and select Routed.
  7. Click the Apply button.  The SBG6900-AC will restart.

    Right click on the image to save it to your computer.

     
  8. Click the Reload link to get back to the login page.

    Image

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