bro, free open connection at colledge is not free to accessing the net, you'll need proxy setting to allowed you to by passing the firewall then it will prompt you with the user name and password.

if you don't configured the proxy setting to the connection specification then there is no way to browse out of their protected zone.

i hope i help making it clear for you. fyi, i worked as an IT support at the University of Waikato, New Zealand.