- Sept. 16, 2010, 12:02 a.m.
While I don't have a specific solution for any of you, I do want to reiterate that where ever you're playing, you need to make sure the appropriate ports the game uses are open to and from your pcs. In many cases, such as a campus, hospital, apartment complex, etc... you won't have the ability to do this yourselves and must rely on a network admin to make sure they're open.
Here's the list of ports again for reference.
Battle.net - is using 1119 TCP and UDP. 1120 is reserved for future use but shouldn't be used at the moment.
Launcher - 1119, 80 for web site for patch notes
Downloader - 3724, 6881 ~ 6999 for P2P, (Downloader uses 3724 first and if it’s not available then moving to 6881 and up to 6999.)
Patching – TCP 80
Voice – 6113 UDP
Something to keep in mind is if this issue has come up on campuses at around the same time for a lot of people, it may be the result of an update to a piece of networking hardware those campuses use, such as a primary Cisco router for example.
We'll continue to monitor the forums for any more info as it's provided to help pin down any possible causes.