A decent firewall for ubuntu 9.10 server?

[Spooter]

Hi all,

Im running some web and email services on my ubuntu 9.10 server. Could you recommend a good firewall so I can lock down all access other than the incoming\outgoing ports required for web and email.

Possibly one I can manage via a web gui would be good. Or even better using webmin?

Thanks again.

 

[Spooter]

Cheers john,

just installed and configured.

Nice and simple.

Just going to install the webmin module now