Funny you should mention this firewall...I just mentioned it only in a few
posts before you!  I've got it running on a P-166/64MB RAM though it
supposedly does run fine even on a 486.  I really like the web interface and
SSHing into it from work and checking the IDS logs, firewall logs, and
traffic graphs.  To access it from outside just enter the IP address:port
into the external service access feature.  Be sure to check out the Special
Edition ISO that just came out on Dec. 21st.

http://www.smoothwall.org

--Leif