RE: MOPO and the 'ping' probes

<[email protected]>
Newsgroups gmane.ietf.mobike
Message-ID <[email protected]>
Tero Kivinen writes:
>
> [email protected] writes:
>> Yes. This would work perfectly if the peer never uses the
>> src/dst addresses from the IP header for anything else except
>> transmitting the reply.
> 
> I disagree on that. 

Perhaps saying "works perfectly" is exaggarating slightly,
but using the latest request for path testing would certainly
be easier if the src/dst address from IP header was not
used for anything else than the reply.

>> However, the MOBIKE protocol will use them, in some cases at
> 
> There is no MOBIKE protocol yet. Your MOPO might be using them, 
> and it must be doing things that way, but do not generalize that 
> to MOBIKE protocol which is not yet even defined. 

This is not a feature of just MOPO, but any MOBIKE protocol that 
works with NATs (and does not do Unilateral Self-Address Fixing).

And yes, I know we still have not formally decided whether the
MOBIKE protocol will work with NATs. But I don't think we should 
even consider doing UNSAF, because that would certainly amount to 
changing how IKEv2/IPsec NAT Traversal works. 

Best regards,
Pasi
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