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SBG6900-AC (v1.5.x): DMZ Host Setup

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Question
How do I setup a DMZ Host in the SBG6900-AC Gateway? 
Answer
The DMZ Host feature allows the Gateway to forward all externally initiated IP traffic (TCP and UDP protocols only) to a default host on the LAN.

This document contains the following sections:
The following are a couple scenarios in which DMZ Host is useful:
  • When the port number or protocol in an in-bound application cannot be anticipated.  For example, some network games select arbitrary port numbers when a connection is opened.
  • When all unsolicited traffic needs to be forwarded to a specific device in the network.
  • When an application does not work well with port triggering or port forwarding.
It is recommend to reserve IP Address, please refer to Answer # 15822 - SBG6900-AC (v1.5.x): IP Address Reserve Setup.
 
CAUTION: A device that is setup for DMZ Host bypasses the firewall and security setting.  It is recommend to enable software firewall on that device or use a more secure method of forwarding traffic such as Port Forwarding.  Please refer to Answer # 15832 - SBG6900-AC (v1.5.x): Port Forwarding Setup.
 
Requirement
  • The IP Address of the device is required to setup DMZ Host.  It can be found in the network settings of that device. 
     
Enabling the DMZ Host
 
  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 Advanced on the top menu, and click the DMZ Host link from the drop-down submenu.  The Advanced - DMZ Host page appears.
  6. On the Advanced - DMZ Host page, DMZ Host -  Enter the IP Address of the DMZ Host.  For example: if the IP address of the server is 192.168.0.2, then enter 2.
  7. Click the Apply button.

    NOTE: A restart is not required, as the settings will immediately go into effect.

    Right click on the image to save it to your computer.     
The SBG6900-AC Gateway is now configured to enable a specific device on the LAN to be the DMZ host.
 
Disabling the DMZ Host
 
  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 Advanced on the top menu, and click the DMZ Host link from the drop-down submenu.  The Advanced - DMZ Host page appears.
  6. On the Advanced - DMZ Host page, DMZ Host - Enter 0.
  7. Click the Apply button.

    NOTE: A restart is not required, as the settings will immediately go into effect.

    Right click on the image to save it to your computer.
The DMZ Host feature in the SBG6900-AC has now been disabled.
 

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