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Re: [DNSOP] I-D Action: draft-ietf-dnsop-refuse-any-04.txt

Richard Gibson <rgibson@dyn.com> Mon, 13 February 2017 14:33 UTC

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From: Richard Gibson <rgibson@dyn.com>
Date: Mon, 13 Feb 2017 09:33:35 -0500
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To: Tony Finch <dot@dotat.at>
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Cc: Ólafur Guðmundsson <olafur@cloudflare.com>, dnsop <dnsop@ietf.org>
Subject: Re: [DNSOP] I-D Action: draft-ietf-dnsop-refuse-any-04.txt
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On Mon, Feb 13, 2017 at 8:03 AM, Tony Finch <dot@dotat.at> wrote:

> There are several ways to avoid this pitfall:
>
> Use TCP
>
> Look for an NSEC(3) record
>
> Query for the specific types you want to know about


The pitfall comes from unexamined muscle-memory assumptions when inspecting
a DNS response, so none of those methods avoid it. They're expecting people
to remember that longstanding behavior has changed without providing any
clue about it.

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