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Re: [dnsext] Short introduction to zone cuts?

Tony Finch <dot@dotat.at> Tue, 20 March 2012 11:45 UTC

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Date: Tue, 20 Mar 2012 11:45:02 +0000
From: Tony Finch <dot@dotat.at>
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To: Ray Bellis <Ray.Bellis@nominet.org.uk>
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Cc: DNSEXT Working Group <dnsext@ietf.org>
Subject: Re: [dnsext] Short introduction to zone cuts?
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Ray Bellis <Ray.Bellis@nominet.org.uk> wrote:
>
> You can try it:
>
> % dig +short @8.8.8.8 1.1.2.2.3.3.5.6.8.1.4.4.e164.arpa. NAPTR
> 100 20 "u" "E2U+pstn:tel" "!^(.*)$!tel:\\1!" .
> 100 10 "u" "E2U+sip" "!^\\+441865332(.*)$!sip:\\1@nominet.org.uk!" .

However BIND gets upset by negative responses (noerror/nodata) because the
authority section of replies is wrong.

$ dig a 1.1.2.2.3.3.5.6.8.1.4.4.e164.arpa.
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 42870
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

$ dig a 1.1.2.2.3.3.5.6.8.1.4.4.e164.arpa. @nom-ns1.nominet.org.uk.
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7348
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

20-Mar-2012 11:33:57.577 resolver: notice:
	DNS format error from 2a01:40:1001:37::2#53
	resolving 1.1.2.2.3.3.5.6.8.1.4.4.e164.arpa/A
	for client 127.0.0.1#53299: invalid response
20-Mar-2012 11:33:57.577 lame-servers: info:
	error (FORMERR) resolving
	'1.1.2.2.3.3.5.6.8.1.4.4.e164.arpa/A/IN':
	2a01:40:1001:37::2#53

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
East Sole, Lundy, Fastnet, Irish Sea: Southwesterly 4 or 5, occasionally 6 in
Irish Sea. Slight or moderate, occasionally rough in Fastnet. Mainly fair.
Good.
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