AW: AW: Problem resolving a host wenn TTL of NS-Servers runs out

[Melbinger Christian]

TLP:AMBER

Hi

I can confirm, on my test containers running 9.20.20 and 9.18.46, the problem is solved. Thanks a lot for your help!

Regards,
Christian

-----Ursprüngliche Nachricht-----
Von: Colin Vidal <colin at isc.org>
Gesendet: Mittwoch, 28. Jänner 2026 23:24
An: Melbinger Christian <Christian.Melbinger at wienit.at>
Cc: bind-users <bind-users at lists.isc.org>; Ondřej Surý <ondrej at isc.org>
Betreff: Re: AW: Problem resolving a host wenn TTL of NS-Servers runs out

Hi,

Thanks for those precision. As the resolver detects a loop while attempting the resolution using IPv4 servers it bails off from there. I think this is the reason why `dual-stack-servers` is not helping.

I was able to reproduce the problem locally and have full log of it, I'll investigate more tomorrow. While there is a misconfiguration on the authoritative side (the TTL of the name servers at the delegation should be the same as in the child zone), this sounds like something's wrong in the resolver anyway.

--
Colin Vidal -- colin at isc.org
Internet Systems Consortium
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