When you talk about roaming Windows 2000 are you referring to the VPN client built into Win2K? Ciscos universal VPN client will support Windows 2000 to router configurations soon. I would work closely with Ciscos TAC on this one if I were you.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...