when you login to your router, click applications and gaming tab, then DMZ sub-tab, there is a little help file off to the side. If you are using a linksys, then you MUST set the computer to a static IP. I recommend just using port forwarding though to the computer you want. You will have to set up 3 different ports (5998, 9000, and 7000~7005 by default unless you add more zones or change the ports). As a referance, the help link reads:
The DMZ hosting feature allows one local user to be exposed to the Internet for use of a special-purpose service such as Internet gaming or videoconferencing. DMZ hosting forwards all the ports at the same time to one PC. The Port Forwarding feature is more secure because it only opens the ports you want to have opened, while DMZ hosting opens all the ports of one computer, exposing the computer so the Internet can see it.
Any PC whose port is being forwarded must have its DHCP client function disabled and should have a new static IP address assigned to it because its IP address may change when using the DHCP function.
1. To expose one PC, select Enable.
2. Enter the computer's IP address in the DMZ Host IP Address field.
3. Click the Save Settings button.
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