Re: [DNSOP] Comment on section 2 of draft-ietf-dnsop-nxdomain-cut-05.txt

Stephane Bortzmeyer <bortzmeyer@nic.fr> Thu, 29 September 2016 11:54 UTC

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Date: Thu, 29 Sep 2016 13:49:55 +0200
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Matthew Pounsett <matt@conundrum.com>
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Cc: Edward Lewis <edward.lewis@icann.org>, "dnsop@ietf.org" <dnsop@ietf.org>, "White, Andrew" <Andrew.White2@charter.com>
Subject: Re: [DNSOP] Comment on section 2 of draft-ietf-dnsop-nxdomain-cut-05.txt
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On Tue, Sep 27, 2016 at 03:46:16PM -0700,
 Matthew Pounsett <matt@conundrum.com> wrote 
 a message of 137 lines which said:

> My rationale is that if foo.bar.example.org were still a valid name

By "valid name", do you mean "something which existed less than $TTL
seconds ago"?

> at the time that the bar.example.org NXDOMAIN response was issued,
> then NXDOMAIN was not the correct response.  It would be
> inappropriate to answer for foo.bar.example.org out of the cache in
> that case.

The DNS is full of these (minor) inconsistencies. As Mark Andrews
said, temporal issues are not new.