Samodelkin1: I've debunked this completely. It seems that SWR opens random ports. Look at my screenshot. 2300-2400 is consistent, but the rest of it is not. You'll have to forward ports as you run the game. I'd use something like http://www.nirsoft.net/utils/cports.html#DownloadLinks to find out which ports the game is using, then forward them, then have your friend connect. You have to do this EVERY TIME, though. There has to be a better way.

adamyedlin: Dude, I've played a bunch of games with my brothers using this method, and it works every time. We have never had an issue.

Samodelkin1: Yes, I got it to work directly, too.

Laescure: I just checked that and yep, port are different every time i launch a multiplayer game, except for 2300 tcp and 2350 udp. The two other ports are randoms.