On 11. 01. 24 18:34, Bellebaum, Thomas wrote:
Hello,
We have been looking at some DNS resolvers and encountered a question:
When a DNS response contains (in the answer section) records which were
not requested, how should the resolver react to those and what should
it return to the requesting client?
For example:
QUESTION:
example.com IN A
ANSWER:
example.com IN CNAME www.example.com
www.example.com IN A 3600 1.2.3.4
google.com IN A 3600 5.6.7.8
Tangentially related is very recent (two weeks old!) experiment which
looked at handling unsolicited RRs in the AUTHORITY section.
See
https://chat.dns-oarc.net/community/pl/iyw9znj4wbgdfbbwwz1jjezt6o
and the discussion following it.
In case you don't have DNS-OARC chat login yet see
https://www.dns-oarc.net/oarc/services/chat
HTH.
--
Petr Špaček
Internet Systems Consortium
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