Set Up a Router/Firewall based on Ubuntu Server

[ktritty]

I would like to build a router/firewall box, for use at my workplace. I have been very happy with my previous ubuntu server projects- web server with file and print sharing, torrent, all the usual good stuff. I am hoping that the always awesomely flexible ubuntu is also up for the task of packet filtering and routing between several networks. [Edited: See Links in my Reply Below].

I have a moderately old Dell (Dimension 2300, P4 single-core w/384MB ram) that I have already fitted out with 4 NIC's. [Edited: Truncated]

I want to get started by simply getting a routing table set up between the four interfaces. Later on, I want to set up a fairly advanced firewall (unsure of the vernacular here so I will spare it) that will only allow selected ports to go between certain networks.

[Edited: Truncated]

Thanks for any guidance!

[juancarlospaco]

Try Vyatta Community Edition...

[ktritty]

Thank you for the suggestion on the platform to try. It looks like a good option. I have also found PfSense and a number of others at the following URL:
http://en.wikipedia.org/wiki/List_of_router_or_firewall_distributions

***
A friend of mine found the following tutorial. I thought something like this might exist; it was right under my nose, but somehow I didn't find it:
https://help.ubuntu.com/community/Router

Additionally, the following makes use of Webmin tool
http://ubuntulinuxhowto.blogspot.com/2006/06/setup-your-computer-to-be-router.html

As I suspected, Ubuntu seems to be a good platform for versatile routing. I am marking this thread as "Solved". I am confident that there is enough precedent that I can get my router off the ground successfully.

[ktritty]

[Truncated: This Reply got Double-Posted].