I used to access internet with my laptop in campus, which require proxy.
My internet at home do not require proxy -or rather I don't know any proxy setting since I always set browser setting to automatic. When I try to access internet at home with ubuntu it always try to access it with my campus proxy. I have no idea with to stop it.
Browsing is no problem. I can change the setting in firefox easily enough. The problem is with installing new software.