Don't you just hate it when you are trying to join your buddies game on Halo 3 (Or any other game for that matter) and you find out that you have STRICT NAT? Well today I am going to show you how to fix that problem. It doesn't matter if you are running a Modem to a Router or a Router to a Router. If you are running behind two routers thought the process gets a little complicated but not too complicated. First of all before we get too ahead of ourselves, we need to how what IP your router is so that we can port forward. To do this on Windows we need to go to: Start - Control Panel - Network Connections - Double click on your current network connection - Click on the Support Tab - Your Default Gateway IP address is your router.