I've been through every post I could find on multiplayer "fixes" and the only thing that has allowed my brother to connect to me is when I port forwarded 53000:65000. Since it's probably not a good idea to have this many ports being forwarded I was wondering if anyone has figured out a more narrow range?
I've tried enabling uPnP and no luck and I've tried 7777,7778 among others that people have mentioned worked for them.
My brother and I also have both the game.exe files as exceptions to windows firewall.
Any ideas? Thank you!