...
Another concern I have is that, in an IPv6-only world, even if you
eliminate NAT, there will still be firewalls, and those firewalls will
frequently have the property that they block traffic coming from the
outside to a particular IP/port on the inside unless an outbound packet
has been generated from the inside from that IP/port. This means that IP
addresses are not globally reachable. You'd still need most of the same
solutions we have on the table today to deal with this problem. Indeed,
in the VoIP space, I believe you'd need pretty much everything,
excepting you'd be able to remove a single attribute from a few of the
protocols (STUN and TURN in particular), which tell the endpoint its
address on the other side of the NAT. The endpoint knows its address,
but all of the protocol machinery is still needed to rendezvous with the
other participant in the call.
I think this is why we chartered MIDCOM in the first place. Maybe
people would like to help with that work?
Brian
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