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[dnsext] Reflection of the resolver's IP address (Was: a definition of consistency

Stephane Bortzmeyer <bortzmeyer@nic.fr> Fri, 29 January 2010 13:18 UTC

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Date: Fri, 29 Jan 2010 14:10:45 +0100
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Colm MacCárthaigh <colm@allcosts.net>
Cc: namedroppers@ops.ietf.org
Subject: [dnsext] Reflection of the resolver's IP address (Was: a definition of consistency
Message-ID: <20100129131045.GA12844@nic.fr>
References: <201001290216.DAA11317@TR-Sys.de> <6f5b6fe71001290132s258b9eb3i1cdbd3e6f4c75f7f@mail.gmail.com> <2F01D84C-6633-499F-B3D3-ACE924AD40DF@rfc1035.com> <6f5b6fe71001290223h77443b7cy21eb884a868daf46@mail.gmail.com> <BB97B845-9302-4D3E-8A4A-5D685CC97099@rfc1035.com> <6f5b6fe71001290405i425107bcge41db790cd94558e@mail.gmail.com>
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On Fri, Jan 29, 2010 at 12:05:07PM +0000,
 Colm MacCárthaigh <colm@allcosts.net> wrote 
 a message of 78 lines which said:

> many auth DNS providers provide records that reflect back the
> resolver IP, for example, to aid debugging. (e.g. whoami.akamai.net,
> whoami.ultradns.net).

Is there one which works with IPv6 or at least does not crash? These
two are awfully broken.


% dig AAAA whoami.ultradns.net

; <<>> DiG 9.5.1-P3 <<>> AAAA whoami.ultradns.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 16990
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;whoami.ultradns.net.		IN	AAAA

;; AUTHORITY SECTION:
ultradns.net.		60	IN	SOA	udns1.ultradns.net. domadmin.ultradns.net. 2010012801 900 600 604800 60

;; Query time: 22 msec
;; SERVER: ::1#53(::1)
;; WHEN: Fri Jan 29 14:10:17 2010
;; MSG SIZE  rcvd: 99


% dig A whoami.ultradns.net

; <<>> DiG 9.5.1-P3 <<>> A whoami.ultradns.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58509
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;whoami.ultradns.net.		IN	A

;; ANSWER SECTION:
whoami.ultradns.net.	0	IN	A	192.134.4.69

;; Query time: 17 msec
;; SERVER: ::1#53(::1)
;; WHEN: Fri Jan 29 14:10:29 2010
;; MSG SIZE  rcvd: 64

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