At my school they use a Novell BorderManager as a proxy, and since I have a
user there (because I'm attending the school), I would like to be able to
use my laptop via there network...

But, when I set Mozilla Firefox to use [ip]:[port] as the proxy for
HTTP/HTTPS it gets redirected to a login-page, but before loading the
login-page the connection breaks and I get "Document contains no data"...

Trying the same thing i KDE via Konqueror I reach the login-page but I
cannot submit the form to login :'(

Is it even possible to use the BorderManager login in Linux, or to do some
sort or trick to pre-auth the laptop in novell (like the novell
windows-client-login does)

That would really make my day...

Morten Fangel