[dns-operations] Lot's of TXT queries from Google

Moritz Müller moritz.muller at sidn.nl
Fri Oct 8 07:37:34 UTC 2021


Thank you for trying to help out folks!

> On 7 Oct 2021, at 16:56, Viktor Dukhovni <ietf-dane at dukhovni.org> wrote:
> 
> I wonder whether this is an attempt to collect the NSEC3 chain for an
> off-line dictionary attack?  12 character random names are long enough
> to sample the space very well, though shorter strings would also do.

That sounds possible, but doesn’t explain the _dmarc/default labels, right?

@puneet
Would that be worth further exploring on your side?
At some point, we received 16264 qps of those type of queries at one site.

—
Moritz

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