TIS's FireWall ToolKit works on the mac68k platform, and should run on 
any of the other ports.  There is a FAQ on setting it up located at:

http://puma.macbsd.com/macbsd/howto/fwtk-faq.html

I hope this helps.

Later.

-- 
Colin Wood                                      ender@is.rice.edu
Consultant                                        Rice University
Information Technology Services                       Houston, TX