I would recommend forwarding some ports on your router, but since you're using your University's connection you probably can't do that. Coincidentally, I've heard of a lot of people having problems when using a school network.

This is a very common issue.. you just don't hear about it as much anymore since a lot of people gave up and quit. Usually it starts happening after an update, or after an improper disconnect.. and then it just never goes away.

I found this ZAM thread that would probably be worth reading through.
http://ffxiv.zam.com/forum.html?foru...5461089&page=1