Port Forwarding Not Working?

I have a lot of experience doing server stuff on a home network (don't ask...) Anyways first go in Windows firewall, then click exceptions, add a port, put in the number you want to allow (example: port 4534 for a game called armagetron) and the protocol (TCP for most, UDP is used for some games and voice/video... you can do the same port twice with one entry TCP and the other UDP if you're unsure.) Now the port forwarding. Your router igns each computer an IP address that may change. To make it static, you can try enabling MAC address (aka physical address) control, which will ign specified computers a specified IP that you can forward to. Look up a tutorial on google for MAC control, but if there is an option, you should allow unspecified addresses to connect / ociate / whatever. Then, forward to the newly fixed IP address. ISPs would never block this kind of stuff, so they aren't part of the problem.