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dns: set AA flag on responses#36

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arekm wants to merge 1 commit intoletsencrypt:mainfrom
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Open

dns: set AA flag on responses#36
arekm wants to merge 1 commit intoletsencrypt:mainfrom
arekm:main

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@arekm arekm commented Apr 24, 2026

challtestsrv is authoritative for every name it answers and synthesizes its own SOA in the AUTHORITY section, so replies must have the AA bit set per RFC 1035 4.1.1. Without it, AA=0 + an authoritative SOA is an internally inconsistent response that DNSSEC validators and strict test harnesses can flag.

And that's exactly how I hit this - my test verifies AA flag.

challtestsrv is authoritative for every name it answers and synthesizes
its own SOA in the AUTHORITY section, so replies must have the AA bit
set per RFC 1035 §4.1.1. Without it, AA=0 + an authoritative SOA is an
internally inconsistent response that DNSSEC validators and strict test
harnesses can flag.
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