On Jul 25, 2023, at 00:19, Tobias Brunner <tob...@strongswan.org> wrote:
> 
> 
> 
> That's exactly what I'm proposing.  Make it *mandatory* that the first
> rekeying of the Child SA that's created with IKE_AUTH is a regular one.
> Because if that's not the case, it might be impossible for a responder
> to deduce what the initiator's proposal is.  All further rekeyings of
> that Child SA can be optimized afterwards.

I do not want to make it mandatory because for IoT devices with provisioning, 
this is not needed and the whole point is saving energy by not sending 
unnecessary bytes and a regular rekey is a LOT of bytes.

Paul 
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