When i'm using my university connection I can't run apt-get update normally as I do at home or any other place.
Everything else (that use connection) works properly.
I've already tried to change the repositories provider to a local one (Brasil) and now i'm using the official Canonical repos.
It doesn't leave 0% [waiting headers] part.
How could I debug this? What should I tracert to find where the connection is goin down?
I reinstalled the operating system and everything worked good... sadly i didn't figured out the problem.
If your university is slowing down traffic between your computer and specific Internet servers (one way of doing what has been suggested in the comments), then you could probably solve your problem by switching to a different download mirror.
The easiest way to change this is in the Software Sources window. I don't know what release/flavor of Ubuntu you're running so it's hard to provide optimal instructions for bringing that up graphically, but you can probably bring it up by running gksu software-properties-gtk.
Many universities run their own Ubuntu mirrors. You should ask around and see if there is a local mirror.
