Plutonium

Hi, since last week my friend isn't able to connect to my games. we start solo games without problems but he can't connect to me and i can't connect to him. uPnP is enabled and we got no errors, it just loads and then nothing happens, even with the connect command

Hi me and a friend use hamaci to play,but when a friend connects to me we can play, if i connect to him the game doesn't start. We tried everything, how can we solve?