"libor.peltan" <[email protected]> writes:

> On the other hand, I agree that an analysis of how heavily the Root
> Server could potentially be impacted by stray .alt queries would be 
> beneficial for deciding if we need to implement a defense and how. But
> I doubt this is possible to estimate.

Well, we do have some past examples of other strange things to call
upon.  There was some oddness with increase queries during the DNSKEY
roll [1].  Then there was the chromium random DNS query string usage,
which I first spoke about at DNS-OARC in 2019 [2] and VeriSign later
wrote about in 2020 [3].  My guess is that queries for .alt would be
less than the chromium "feature", since negative answers for .alt would
be cached by resolvers at least unlike the random unique strings from
Chromium.

Footnotes:
[1]  http://doi.acm.org/10.1145/3355369.3355570
[2]  https://youtu.be/sh9Bbk_1bMQ?t=1365
[3]  https://blog.apnic.net/2020/08/21/chromiums-impact-on-root-dns-traffic/

-- 
Wes Hardaker
USC/ISI

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