How do I set my router to allow all computers to host on line games?

I have Port Forwarding set to open ports 6112-6119. And it works fine when either of my computers host alone. but when they both get on only the last one on can host. and if the one that cant host joins the game of the one that can host it seems to close the ports for both.

so basicly, alone each works fine. but together they null each other. Should I open or enable some other option other than port farwarding?

How do I set my router to allow all computers to host on line games?software

Port forwarding is done to a particular internal IP address - the address of one of your computers. All incoming requests for that port are sent to that computer. Port forwarding the same port(s) to two computers can't work because it doesn't mean anything - you can't forward one request to two computers.

Depending on the game, and the router, you might be able to set the game in one computer to host on different ports. For example, set on computer to host on 5112-5119. Then forward 5112-5119 to that computer.

BTW, you should set the computers to have static IP addresses (not with your provider - in the computers themselves). Exactly where you do this depends on what version of Windows you're running (assuming it's not a Mac). What address range you use depends on which router you're using. If the computer's address changes (first one gets .1, second one gets .2 - no guarantee which gets what), the ports get forwarded to the wrong computer.