At home I have an OpenVPN server setup on my Gargoyle router and I can VPN in from my Android phone over 3G. It works really well.
However when I can't VPN over the wireless network at uni. I know pretty much nothing about networks but I guess my uni has a port blocked so my router can't talk back to my phone. My VPN setup is basically the same as the default, including port 1194: http://www.gargoyle-router.com/wiki/doku.php?id=openvpn
So does this mean I have to find a new port that is open on my uni network, and define this in my OpenVPN server? If so, what ports do I try or how can I find them? Can I use a popular port like 80 or 443?