I have a windows 2003 server running the heartbeat client, trying to tunnel through a linksys wrt54g router with patched firmware. The windows server is currently DMZ an gets all traffic forwarded according to iptables. Website says the tunnel is enabled, but I always get request timed out when i try to ping the POP endpoint or any other ipv6 address. Perhaps someone has a hint for me where to start solving this problem.