Ubuntu newbie here. And maybe a little paranoid concerning security.
The building where my office is located offers free wifi for its tenants (wpa2 - tenants are given the network password.) I'm still leary of using it because I'm not sure what kind of security I should be running on my laptop using Ubuntu 12.04. To me, it kind of feels like an "open" network among us tenants.
I have firestarter running on my laptop but understand it is a basic firewall and may not be as robust as I need. What should I be running or doing to keep my computers safe at work?