On 25 nov 2008, at 23:10, Tony Hain wrote:
Iljitsch van Beijnum wrote:
...
But in any event, compared to the backflips through flaming hoops we
have to do in IPv4, the asking a remote server what our source
address
looks like from the outside to make address based referrals work
doesn't seem too onerous. Or do you disagree?
Who do you ask??? Your note assumes there is only one 'outside', so
any
server could answer the question. There is absolutely no restriction
on
where and how topology warts are deployed, so asking a server in
network A
what your address will appear to be to network B is fundamentally
absurd.
Well, the case where my externally visible address is different
depending on who I talk to makes it fundamentally impossible to set up
peer to peer connections if the other end is living with the same
limitation, so we'd have to define this such that only a single
translation is permitted at a time.
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