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Re: [DNSOP] CloudFlare policy on ANY records changing

Tony Finch <dot@dotat.at> Wed, 11 March 2015 12:13 UTC

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Date: Wed, 11 Mar 2015 12:13:42 +0000
From: Tony Finch <dot@dotat.at>
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To: Evan Hunt <each@isc.org>
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References: <35E6FB76-9751-41A4-BF6B-38A8F0BFF82E@puck.nether.net> <54F9FBB7.6080109@redbarn.org> <CAGmQtQJrpx_XG_OJTShsW5YqAeFKZwdMa16XW7iry9PR0_FT+A@mail.gmail.com> <20150310025859.8A04D2B21054@rock.dv.isc.org> <CAGmQtQJta4EXRD4pLOk=xVH0dGirHeb=edkPTMWLmKXBcBVK0Q@mail.gmail.com> <5B445B49-BA18-493A-A1EA-DC90C7C6D7AE@vpnc.org> <21759.4545.472775.866594@tale.kendall.corp.akamai.com> <F6A39307-6C8F-4FD5-8CAD-97775C5276A9@vpnc.org> <0A8D7AE0-B6FF-4B85-A42B-4EBF93A17873@verisign.com> <54FF86CB.7010705@redbarn.org> <20150311015710.GB10189@isc.org>
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Cc: dnsop <dnsop@ietf.org>, "Wessels, Duane" <dwessels@verisign.com>, Paul Vixie <paul@redbarn.org>
Subject: Re: [DNSOP] CloudFlare policy on ANY records changing
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Evan Hunt <each@isc.org> wrote:
>
> I'm concerned that a NOERROR/NODATA for qtype=ANY, once cached, would be
> identical to the cache representation of an empty nonterminal node, and
> that all subsequent queries for any other qtype would then be answered
> with the cached NODATA.

These are signed zones so the answer has to validate. Perhaps the answer
should be just the NSEC(3) and RRSIG(NSEC(3)) records matching the QNAME,
which is a plausible way to say, yes we have records here even though this
answer doesn't contain them.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
Wight, Portland, Plymouth, Northwest Biscay: Southerly or southeasterly 4 or
5, occasionally 6. Slight or moderate, but rough at first in northwest Biscay.
Occasional rain. Good, occasionally poor.

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