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Re: question about draft-durand-v6ops-natv4v6v4-00
On Nov 19, 2007, at 01:15, Iljitsch van Beijnum wrote:
On 18 nov 2007, at 20:32, marcelo bagnulo braun wrote:
Do you think that current nat traversal techniques would not work
properly if multiple levels of nats need to b traversed?
As far as I've been able to deduce, uPnP and NAT-PMP (not IETF
work) that are common in consumer CPEs won't work unless there is
one NAT and it's on the local LAN. I could be wrong, though.
This is correct. I know of at least one real application that works
through one layer of NAT, but not two: the Back To My Mac feature in
Mac OS X 10.5, which relies on registering wide-area DNS-SD service
advertisements in the members.mac.com zone for the tunnel endpoints.
The mDNSResponder agent doesn't manage the UNSAF problem when there
are multiple levels of NAT between the Mac OS X host and the DNS
BTMM can use either NAT-PMP or UPnP IGD. No other mechanisms are
james woodyatt <email@example.com>
member of technical staff, communications engineering