IPv6 software firewall... for Win 2k ?

[Ninho]

Is there a software firewall for Windows 2000 that can inspect IPv6 packets ?
Requirements would be :

- lightweight, rule-based,
- can inspect native v6 as well as tunnelled packets (payload of IPv4 proto 41)
- either functions as an IPv4 firewall also, or can coexist with a v4-only FW such as Kerio 2.15.
- free or very low cost !

I'm not holding my breath...