NETGEAR DG814 DSL - Manual (Page 72)

Reference Manual for the Model DG814 DSL Modem Internet Gateway
7-4 Advanced Configuration of the Gateway
3. Change the beginning port number in the Start Port box.
For these games, use the supplied number in the default listing and add +1 for each additional
computer. For example, if you've already configured one computer to play Hexen II (using
port 26900), the second computer's port number would be 26901, and the third computer
would be 26902.
4. Type the same port number in the End Port box that you typed in the Start Port box.
5. Type the IP address of the additional computer in the Server IP Address box.
6. Click Apply.
Some online games and videoconferencing applications are incompatible with NAT. The Model
DG814 gateway 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 PC can
run the application properly if that PC’s IP address is entered as the default in the PORTS Menu. If
one local PC acts as a game or videoconference host, enter its IP address as the default.
NAT Status
The NAT Status selection will enable you to disable Network Address Translation.
By default, the gateway will perform Network Address Translation (NAT), allowing all the PCs on
your network to share one public IP address. Alternatively, you can disable NAT, in which case the
gateway will perform traditional routing. With traditional routing, each PC on your LAN can
access the Internet directly using its own IP address as the source address. Also, any PC on the
Internet can directly access any PC on your LAN. The PCs on your LAN must have real, registered
IP addresses, not private, nonroutable IP addresses such as 192.168.0.x.
Note: NAT should only be disabled by advanced users. When NAT is disabled it loses
much of the protection of the gateway, and is exposed to many exploits from the
Internet. If compromised, the computer can be used to attack your network.