I have been port forwarding different games forever but Bo2 via Plutonium without the game on steam is just 100% broken. World at War works fine though.
I already used Windows Defender to change my settings for the launcher and game on both pc's to allow connections. This resulted in my Nat status being changed from strict to moderate on both pc's. I also changed the joining status to open after friending my second account. However, trying to join a custom match does not work at all. I tried inviting, joining lobby, joining an active game, restarting, etc and it just starts the loading process before failing with Unable to join game session error.
I then also opened the 3074 port inside my firewall as well as in my router settings aka port forwarding yet this did not do anything. Furthermore, I tried using the connect command yet that did even less. With this it does not even begin the connection process it just says connecting then silently fails.
All in all their documentation is useless I even verified my files are fine and everything is fully updated.