I've got IPv6 up and running on my LAN. When I wanted to use ip6tables to secure my problems I ran into some trouble.
When I tried to save the rules with
/etc/init.d/ip6tables save
like I did when first using iptables I found that
ip6tables-save and ip6tables-restore are missing. (when installing with USE=ipv6).
After too much pain I found someone else had posted a solution at
http://bugs.gentoo.org/show_bug.cgi?id=39833
a month ago. The solution was very simple, all I had to do was slightly change the ebuild.
Good luck with IPv6
