Dear all,In this updated version of the Delegation Revalidation by DNS Resolvers draft, we address the issues that came up during the dnsop working group session at the IETF 120, namely:
* We mention that the security benefits with DNSSEC validated infrastructure data only applies when re-validation of the referral and authoritative NS RRset responses is done strictly, without falling back to the non-authoritative data. * We address some more error cases, such as what should be done for NODATA responses for the validating NS query, and what to do if validated address records are unreachable. With that, we believe the draft is ready for working group last call. Op 08-01-2025 om 13:22 schreef internet-dra...@ietf.org:
Internet-Draft draft-ietf-dnsop-ns-revalidation-08.txt is now available. It is
a work item of the Domain Name System Operations (DNSOP) WG of the IETF.
Title: Delegation Revalidation by DNS Resolvers
Authors: Shumon Huque
Paul Vixie
Willem Toorop
Name: draft-ietf-dnsop-ns-revalidation-08.txt
Pages: 13
Dates: 2025-01-08
Abstract:
This document recommends improved DNS resolver behavior with respect
to the processing of Name Server (NS) resource record (RR) sets
(RRsets) during iterative resolution. When following a referral
response from an authoritative server to a child zone, DNS resolvers
should explicitly query the authoritative NS RRset at the apex of the
child zone and cache this in preference to the NS RRset on the parent
side of the zone cut. The (A and AAAA) address RRsets in the
additional section from referral responses and authoritative NS
answers for the names of the NS RRset, should similarly be re-queried
and used to replace the entries with the lower trustworthiness
ranking in cache. Resolvers should also periodically revalidate the
child delegation by re-querying the parent zone at the expiration of
the TTL of the parent side NS RRset.
The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-dnsop-ns-revalidation/
There is also an HTMLized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-dnsop-ns-revalidation-08
A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-dnsop-ns-revalidation-08
Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts
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