Whenever I play DayZ and join my friends( or my friends join me ) my internet fucks up, I can't load anything in any browsers ( My Mumble still works though ), Steam becomes offline, and DayZ is like frozen, everyone is running in place. But when I play alone in the server or any server, everything is fine. I don't know if it is an ISP problem or DayZ itself. Please help! EDIT: I played with one of my friends, and it was perfectly fine. I'll try playing with them one by one to know who's the one making me lag and shit. Still need help about it though.
