Re: Two IPv6 Hosts Communicating over IPv4 network

> Thanks for your useful info. Our network is also behind a NAT server.

if your NAT is part of your network (instead of being provided by an ISP),
then you could still use 6to4 by installing a 6to4 router in parallel
with the NAT.

or if you have the ability to alter the NAT's configuration, it is sometimes 
possible to configure the NAT to tunnel 6to4 traffic (IP packet type 41) to an 
internal 6to4 router.

Keith