Hello Kilian,
>> Are there any recommended settings for auth or dnsdist for mitigation such
>> attacks?
>When using dnsdist before a recursor, you could apply client rate limiting
>to further protect against this and similar attacks.
see
https://dnsdist.org/guides/dynblocks.html
https://dnsdist.org/advanced/qpslimits.html
for some documentation and examples.
Winfried
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