Linux + <http://www.shorewall.net/>http://www.shorewall.net/Easy and flexible! Great results so far.
There must be many 1000s of free firewalls running on FreeBSD and Linux, with plenty of complete pkgs, how-to's, boot from cdrom/flash, no disk, etc, with all the major features of proprietary firewalls, and with many of the minor features. No annual hardware/software contracts in perpetuity, just another PC.
Len
