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[core] Re: Paul Wouters' Discuss on draft-ietf-core-dns-over-coap-17: (with DISCUSS and COMMENT)

Martine Sophie Lenders <martine.lenders@tu-dresden.de> Tue, 19 August 2025 11:03 UTC

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Subject: [core] Re: Paul Wouters' Discuss on draft-ietf-core-dns-over-coap-17: (with DISCUSS and COMMENT)
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Hi Vadimir,

Granted. However, if these _examples_ confuse people, I rather not 
confuse them without providing more information and remove the flag ;-) 
(see https://github.com/core-wg/draft-dns-over-coap/pull/54)

Best
Martine

On 8/16/25 21:30, Vladimír Čunát wrote:
> Actually, +AD in queries makes lots of sense to me for very constrained
> devices.
> 
> The devices surely are so limited in power that they do not want to do
> DNSSEC validation themselves, so the DO flag would seem wasteful
> (getting DNSSEC records, usually relatively large).
> 
> Still, I understand that very often these devices will have a secure
> channel to a trusted resolver that does DNSSEC validation (because it's
> a much more powerful machine).  And in that case it makes sense to send
> AD=1 and get the validation information back in the AD bit for free
> (either proven insecure or proven secure - or SERVFAIL for various
> failures).
> 
> --Vladimir
> 
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