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G34/G36: DMZ Setup

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How do I configure the DMZ Host in my G34/G36 gateway?
The DMZ Host feature allows the option to run a publicly accessible server within the home network.  This enables the G34/G36 to forward all traffic to the designated DMZ Host device such as Web Server, Mail Server, Digital Video Recorder (DVR) or gaming device.  That designated DMZ Host device will operate outside of the G34/G36 firewall and allow remote access from the Internet and not the home network.  This document describes how to gather the client IP address and setup DMZ Host in the G34/G36.

CAUTION: The designated DMZ Host device is not protected by the G34/G36 firewall.  It is exposed to the Internet and thus vulnerable to attacks or hacking from any computer on the Internet.  Consider carefully before configuring a device to be in the DMZ.  It is recommended to enable software firewall on that device or use a more secure method of forwarding traffic such as Port Forwarding.  Please refer to Article #19098 - G34/G36: Port Forwarding Setup.

The following are examples of 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.
After completing the DMZ Host setup, it is recommended to reserve the IP address for the client device setup for port forwarding.  Please refer to Article #19097 - G34/G36: IP Address Reserve Setup.

The client device IP Address is required to setup DMZ Host.  It can be found in the G34/G36 Web Manager or from the client device's network information.

DMZ Host Setup
  1. Launch a web browser, such as Internet Explorer, Firefox, or Safari.  Enter into the address box, and press the Enter key.  The https:// Redirect page will appear.   
  2. The SURFboard Web Manager is begin redirected to a more secure connection, click the Proceed button to continue.  The Gateway > Login page will appear.

    User-added image
  3. A security or private risk alert may appear on the web browser advising users to proceed with caution when accessing the Web Manager.  There is no risk in proceeding to the Web Manager.  For instructions to by-pass the alert screen, refer to article # 18181 - Alert Message for Web Manager Access.

    NOTE: The Home Network Wizard will appear if this is the first time accessing the Web Manager.  For assistance with the wizard, refer to article # 19077 - G34/G36: Web Manager First Time Login.
  4. The Username field has admin populated, enter the custom password in the Password field.

    NOTE: If the Login page prompts for email address and password, retrieve the email address and password in the app to sign-in.  For detail instructions in the app, refer to article # 19069 - SURFboard Central: Web Manager Access.
  5. Click the Login button.  The Gateway > Summary page will appear.

    User-added image
  6. On the left hand-menu, click the Connected Devices link.  The Connected Devices > Devices page will appear. 
  7. Under the IPv4 Address section, copy the client's IP Address to use for the DMZ Setup.

    NOTE: If the client is not found it may not be powered on or not connected to the network.

    User-added image
  8. On the left hand-menu, click the Advanced link and then click the DMZ sub-menu link.  The Advanced > DMZ page will appear.  
  9. Click the Enable button.  The DMZ v4 Host fields become active.  DMZ is disabled by default.
  10. Enter the client device's last octet of the IP address in the DMZ v4 Host field.
  11. Click the Save button.  Changes take effect immediately and a restart is not required.

    NOTE: To disable DMZ Host, click the Disable button for the DMZ option and click the Save button.
Right click on the image to save it to your computer.



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