Re: [Add] fixing coffee shop brokenness with DoH

Paul Ebersman <list-add@dragon.net> Thu, 25 July 2019 14:21 UTC

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From: Paul Ebersman <list-add@dragon.net>
To: Eric Rescorla <ekr@rtfm.com>
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Comments: In-reply-to Eric Rescorla <ekr@rtfm.com> message dated "Wed, 24 Jul 2019 10:14:27 -0700."
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Date: Thu, 25 Jul 2019 10:21:34 -0400
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Subject: Re: [Add] fixing coffee shop brokenness with DoH
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jreid> Not really. A validation failure is a fairly strong indication
jreid> that the resolver is lying to you.

ekr> Not really, no. Our current belief is that there is going to be
ekr> quite a high rate of non-malicious validation failures.

What's the basis of this belief?

When I was at comcast, query volumes on recursive were on order 500
billion q/day and hard/persistant DNSSEC failures were on order of
dozens per month, so that seems like a pretty high success rate.