Re: Multi-level NAT and draft-ietf-nsis-nslp-natfw-20

Martin Stiemerling skrev 2010-01-20 10:24:
> Hi Magnus,
> 
> One approach to solve this issues is that each NAT includes its "public IP+port" (== the binding address) in the NATFW NSLP message sent towards the public Internet. This will give a stack of IP addresses+port. The outer NAT (e.g., NAT2) will return the whole stack in the response message. 
> 
> The particular NI could use the stack as input to STUN.
> 
> This requires a change in the objects (e.g., a external binding stack) and some text on the semantics. 
> 
> Does this solve this?
> 

Yes, I think it will solve that. However, there will need some text
around the utility of the addresses in the stack and the need to watch
out for duplicate address domains.

Cheers

Magnus Westerlund

IETF Transport Area Director
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