I just finished my initial tutorial on setting up a m0n0wall firewall on a PC Engines ALIX 2C3 board. I have setup several of these using a Mac. There was a lot of research I had to do to figure out how accomplish it using OS/X. Most of the documentation I found online referenced using Windows systems. So I decided to take what I learned and write a “How-To” on the topic as well as a video to accompany it. You can find the How-To by following this link: https://www.techunplugged.com/tutorials/embeded-m0n0wall-firewall-on-alix-hardware/
Enjoy!
UPDATE: An updated tutorial has been posted here: https://www.techunplugged.com/2009/07/22/alix-monowall-firewall-part-1/