Hi Philip,

> On 4 May 2026, at 12:48, Philip Homburg <[email protected]> wrote:
> 
>> Dear dnsop WG,
>> 
>> the authors of the document said the document is ready for the WGLC
>> and the dnsop WG chairs have considered the discussions on the
>> mailing list and the state the document and we consider the document
>> to be ready for the WGLC.  Hence this message starts a WG Last Call
>> for:  draft-ietf-dnsop-delext-02
> 
> In my opinion this draft is not ready.
> 
> As far as I can tell, this draft can lead to DNSSEC failures.
> 
> For example, a DNSSEC validator that is not a resursive resolver could
> implement this draft. The validator will notice the ADT bit in a DNSKEY
> and for a query type in this range expects either a RRset or a denial
> that the type does not exist in the parent zone.

That is correct.

> However, if the validator forwards to a recursive resolver that does not 
> implement this draft then the recursive resolver will return a proof that
> the record does not exist in the child zone. This wil lead to a DNSSEC
> failure.

That is correct. 

I will add the following text:

XX. Operational Considerations

A Validating Stub Resolver that is Delegation Extension aware MUST only use 
security-aware resolvers that are Delegation Extension aware. A Delegation 
Extension aware Validating Resolver that uses forwarders MUST only use 
Delegation Extension aware and security-aware forwarders. Otherwise 
DNSSEC-secure zones might fail to validate and DNSSEC-insecure zones might 
observe inconsistent answers.

Thanks for the feedback!

Warmly,

Roy






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