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Setting Up A Default DMZ Server

The Default DMZ Server feature is helpful when using some online games and videoconferencing applications that are incompatible with NAT. The modem router is programmed to recognize some of these applications and to work properly with them, but there are other applications that may not function well. In some cases, one local computer can run the application properly if that computer's IP address is entered as the Default DMZ Server.

Note: For security reasons, you should avoid using the Default DMZ Server feature. When a computer is designated as the Default DMZ Server, it loses much of the protection of the firewall, and is exposed to many exploits from the Internet. If compromised, the computer can be used to attack your network.

Incoming traffic from the Internet is normally discarded by the modem router unless the traffic is a response to one of your local computers or a service that you have configured in the Ports menu. Instead of discarding this traffic, you can have it forwarded to one computer on your network. This computer is called the Default DMZ Server.

How to Configure a Default DMZ Server

To assign a computer or server to be a Default DMZ server, follow these steps:

  1. Log in to the modem router at its default LAN address of with its default User Name of admin, default password of password, or using whatever Password and LAN address you have chosen for the modem router.
  2. From the Main Menu, under Advanced, click the WAN Setup link to view the page shown in Figure 5-1:

    Figure 5-1

  3. Select the Default DMZ Server check box.
  4. Type the IP address for that server.
  5. Click Apply to save your changes.

Table of ContentsPreviousNextIndexSearch Knowledge Base 202-10133-01, November 2005