This howto walks you through building a FreeBSD-STABLE firewall with IPFILTER. This is a checklist that walks you through the entire process from beginning to end: installing FreeBSD-stable, recompiling the kernel, OpenSSH security, TCP-wrappers, VESA video modes, and special syslog logging for your firewall.
You can download it from the following link: https://packetstormsecurity.com/files/download/25326/FreeBSD-STABLE_and_IPFILTER.htm
Source: https://packetstormsecurity.com/files/25326/FreeBSD-STABLE_and_IPFILTER.htm.html