I've had some good replies with this before, but I am kind of curious what the Slackware users here use as a firewall.

Not a hardware firewall, or a "Linux Firewall Distro" Just a firewall you installed on a Slackware box and found to be good. The ones I find are usually just a front end for IPTables or something like that, which is fine, but they are also usually crap.The two I have liked the best are SuSEFirewall2 and the RedHat firewall. They both seemed to work better than a few others I used. So, what firewall do you use for your Linux boxes?

It's probably been months since I looked into this last so I need a boost back into some new firewalls for Linux that don't suck, and don't require a machine. I don't really care how great a firewall is if I have to use one of my boxes because it's a Linux distro itself.

Google pulled up a few things that were OK, but I havn't used any of these and want an opinion on which ones you have actually used before and liked.