[dns-operations] mcr.microsoft.com / trafficmanager.net again

Ondřej Surý ondrej at sury.org
Wed Sep 24 10:29:28 UTC 2025


I would argue that you didn’t “fix” it. The people that need to fix it sit at Microsoft.

A single domain name that requires 100+ outgoing queries is not only broken, but also nasty to the whole DNS ecosystem. It shoves the complexity and costs to anyone running a recursive resolver.

Ondrej
--
Ondřej Surý (He/Him)

> On 24. 9. 2025, at 11:39, Florian Lohoff <f at zz.de> wrote:
> 
> The cache-cold setup can be fixed with max-recursion-queries 100; but
> i still see sporadic SERVFAIL although frequency/probability dropped.




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