N4v3r1ck

I have a prob: If i want to join a friends game, i get a data transimission ( error 86420 )prob, if he wants to join a game of me, he gets te prob too, but if i search a game with anyone theres no prob.The wifi community says if i can join a game with anyone but not a game of a friend, the friends firewall settings are wrong or my firewall settings because he cant join in my game too, but what exactly do i have to do ? can some1help me PLS?

I have a prob: If i want to join a friends game, i get a data transimission ( error 86420 )prob, if he wants to join a game of me, he gets te prob too, but if i search a game with anyone theres no prob.The wifi community says if i can join a game with anyone but not a game of a friend, the friends firewall settings are wrong or my firewall settings because he cant join in my game too, but what exactly do i have to do ? can some1help me PLS?