We built realtime multiplayer into a game we're developing. The game was built in Flex, the multiplayer server is based on Apache Mina. We're trying to decide on a port to run that server on that has the least chance of being blocked by company firewalls, school firewalls, etc. etc.<p>So far, we've been running the multiplayer server on port 443 assuming that no IT department would block the SSL port. But low and behold, we've found at least 1 law firm that blocks port 443 and it has me a little worried.<p>So, what's the least likely port to be blocked that we could run this multiplayer server on?<p>Has anybody had any particular experience with choosing a port poorly or wisely?
When I worked on remote-access software that tunneled through firewalls, it ran on port 443 with a configurable backup of 80. You aren't going to get something that's more likely to be open.<p>Really, if a law firm doesn't want its employees playing multiplayer games on company time, let them block it. And I thought my cofounder was bad for marketing casual games to Deutsch Bank employees. :-P