Currently the site has free WiFi, but the ports are limited: 22, 21, 80 and 443 are open and unrestricted.

This means ssh, ftp, http, and https can get out.

We are working with campus networking operations to open up irc and cvs, but it's not clear at this point if those will work. So, you should plan on ways around that (proxying, for example, or using alternate services that don't require an extra port).