Cross-platform Pf Guide
Cross-platform Pf GuideWhile the official OpenBSD Pf guide is very good, I recommend those wishing to learn more about the Pf firewall check out Peter N. M. Hansteen's Firewalling with Pf guide. I like this document because it shows how to get Pf working on OpenBSD, FreeBSD, and NetBSD. Peter also covers the most common deployment scenarios and he addresses topics I consider important. Check it out if you're considering a Pf-based firewall solution.
Comments
http://www.samag.com/documents/s=9658/sam0505e/ << Jason Dixon's article
http://www.countersiege.com/doc/pfsync-carp/ << Ryan McBride the author of CARP and OpenBSD developer
Cheers.
_Raju