iptables on warty

[wild madagascar]

Hi,
Until about a couple of months ago I still run Fedora Core 2. Since then
I moved on to Ubuntu and I quite like it. I do nevertheless have a
problem setting up a firewall. I actually am running firestarter which
is great but i would prefer it to be the traditional way with an
iptables config file.... Not everybody in my office can indeed
understand they first have to run firestarter prior to being able to
send any mail out.... Is it possible config an iptables file and if so
how can I do it?

TIA

Didier