Pf Firewall for FreeBSD, OpenBSD. Home RSS Search March 31, 2014 FreeBSD and OpenBSD ( pf.conf ) The default firewall for OpenBSD as of v3.0 is called "packet filter" or more commonly referred to as pf. Pf is a BSD licensed stateful packet filter written by Daniel Hartmeier. Welcome to pfSense - Open Source Firewall and Router Distribution - pfsense.org. PF: The OpenBSD Packet Filter. [up to FAQ][Next: Getting Started] PF: The OpenBSD Packet Filter Table of Contents Packet Filter (from here on referred to as PF) is OpenBSD's system for filtering TCP/IP traffic and doing Network Address Translation.
PF is also capable of normalizing and conditioning TCP/IP traffic and providing bandwidth control and packet prioritization. PF has been a part of the GENERIC OpenBSD kernel since OpenBSD 3.0.