12345,12346; 31337 - 31339; 27374; 1243; 31785 - 31792; 135; 137 - 139; 445; 4444; 1847; 1900; 3127 And also 0 - 1023 and 1080. These are the ports they block, I got it straight from their site. I've been getting error codes since day one, but they seem to dwindled down to only Centipede and the occasional Newt. It's impossible to complete missions. The weird thing is that at night I can sometimes play for an hour before I get disconnected. Can we possibly get any reply from Bungie stating that they acknowledge the problem? This isn't the first time the problems with Telenet are mentioned, but they're only looking for university fixes.