Right, so whenever i join a game, i am able to connect to pretty much everyone else, but they cannot connect to me. I'm on a router, but have disabled threatfire/avast/zone alarm and still have the issue. A fellow that shares my router is able to connect to the games i'm trying to. Any ideas on what may be causing this problem and any possible solutions? Port forwarding is not possible due to security and property concerns.

edit: So I connect to the host, but then i either get every1 waiting to connect to me and now am only connected to the host and no one is connected to me, or it locks with the host attempting to connect to me. I've tried with lots of hosts. I have also encountered issues with past patches not allowing me to play after playing a single online match. I have previously had GG's online in pantheon and custom games, I just don't get this game and its connection issues.