m0n0wall
embedded FreeBSD firewall/router distribution
chrisbuechler.com » m0n0wall
official unofficial m0n0wall site
IPv6 firewalling knows no middle ground: Page 1
the IETF is recommending ipv6 consumer routers use stateful firewalls by default, resulting in many of the same end-to-end connectivity issues as ipv4
IPv6 with Debian
Martin Krafft's excellent summary on getting IPv6 working in debian