in "options > connect > options > advanced" there is a checkbox called "Use random ports for listening sockets".
What exactly does this do, in detail? the reason that I want to know is that my schools firewall blocks irc, but if I check this option it works anyway. Maybe I can get my prog to work trought the firewall using this, so I need detailed info. so does anyone know a doc or something explaing this, or can write a short explanation?