Setting up a Linux box as a firewall?

[hiflyr91]

This may have been covered before. If it has, my apologies, as I've overlooked it somehow.

I've got an old "white-box" computer (1.6ghz P4, 512mb ddr, 40gb, etc) that I would like to set up as a firewall. All incoming, and outgoing traffic will go through it.
Lots of the new releases have become bloated with things I'm just not going to need. To use this box as a firewall, what do I really need to install? Which distro would be easy for a networking newb to set up?
Any, and all help is appreciated.

[daark.child]

There are some distros that come preconfigured for use as a firewall. This page has a list of distros that may be of interest to you.

[hiflyr91]

Thanks for pointing me in the right direction. I'm downloading Astaro now. I'll post back later on ease of setup, etc.
Hopefully, this won't be too painful.

[MikeTbob]

Linux LiveCD Router, that sounds like something I'd like to goof around with. Thanks for that link daark.child.

[Snoop1990]

Or try m0n0wall m0n0wall !

That's a unix based firewall.