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Re: how to track down dns SERVFAIL?



A good visuial/web based tool for this sort of thing is DNS Bajaj -- <http://www.zonecut.net/dns/>



--On Friday, December 10, 2004 10:15 +1030 David Purton <dcpurton@chariot.net.au> wrote:

Hi,

I'm having trouble looking up a certain domain (not hostsed by my dns
server) and I'm not sure if it is a problem with my server or the dns
server who is authoritative for this domain.

Let me explain:

www.sydneyanglicans.net is the host I am after.

Here's is a series of dig commands and their output that illustrate what
I can and can't do (see below for the oputput from each one):

$ dig www.sydneyanglicans.net
$ dig net
$ dig sydneyanglicans.net @a.gtld-servers.net
$ dig www.sydneyanglicans.net @ns01.glebeaust.com.au
$ dig fa0-fw01-sds.glebeaust.com.au
$ dig 66-sds.glebeaust.com.au

The only one of these quieries to fail is the first one. And it was
working fine up until a couple of days ago. The default nameserver is
bind9 running on woody. It is a caching server, but doesn't forward
first. FWIW, my isp nameserver will not look up this address either.

So is this a problem with my server or the remote server?
Is there any way to get more info than just SERVFAIL?


cheers

dc



Here is the output from each of these commands:

$ dig www.sydneyanglicans.net

; <<>> DiG 9.2.1 <<>> www.sydneyanglicans.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 34065
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.sydneyanglicans.net.       IN      A

;; Query time: 0 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Fri Dec 10 10:03:29 2004
;; MSG SIZE  rcvd: 41



$ dig net

; <<>> DiG 9.2.1 <<>> net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18479
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;net.                           IN      A

;; AUTHORITY SECTION:
net.                    10800   IN      SOA     a.gtld-servers.net.
nstld.verisign-grs.com. 1102635256 1800 900 604800 900

;; Query time: 745 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Fri Dec 10 10:05:05 2004
;; MSG SIZE  rcvd: 94



$ dig sydneyanglicans.net @a.gtld-servers.net

; <<>> DiG 9.2.1 <<>> sydneyanglicans.net @a.gtld-servers.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35169
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;sydneyanglicans.net.           IN      A

;; AUTHORITY SECTION:
sydneyanglicans.net.    172800  IN      NS      ns01.glebeaust.com.au.
sydneyanglicans.net.    172800  IN      NS      ns02.glebeaust.com.au.

;; Query time: 275 msec
;; SERVER: 192.5.6.30#53(a.gtld-servers.net)
;; WHEN: Fri Dec 10 10:06:40 2004
;; MSG SIZE  rcvd: 91



$ dig www.sydneyanglicans.net @ns01.glebeaust.com.au

; <<>> DiG 9.2.1 <<>> www.sydneyanglicans.net @ns01.glebeaust.com.au
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63683
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;www.sydneyanglicans.net.       IN      A

;; ANSWER SECTION:
www.sydneyanglicans.net. 3600   IN      CNAME
fa0-fw01-sds.glebeaust.com.au. fa0-fw01-sds.glebeaust.com.au. 3600 IN
CNAME   66-sds.glebeaust.com.au. 66-sds.glebeaust.com.au. 3600   IN
A       202.59.19.66

;; AUTHORITY SECTION:
glebeaust.com.au.       3600    IN      NS      ns01.glebeaust.com.au.
glebeaust.com.au.       3600    IN      NS      ns02.glebeaust.com.au.

;; Query time: 57 msec
;; SERVER: 202.59.19.67#53(ns01.glebeaust.com.au)
;; WHEN: Fri Dec 10 10:07:32 2004
;; MSG SIZE  rcvd: 159



$ dig fa0-fw01-sds.glebeaust.com.au

; <<>> DiG 9.2.1 <<>> fa0-fw01-sds.glebeaust.com.au
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57059
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;fa0-fw01-sds.glebeaust.com.au. IN      A

;; ANSWER SECTION:
fa0-fw01-sds.glebeaust.com.au. 3013 IN  CNAME   66-sds.glebeaust.com.au.
66-sds.glebeaust.com.au. 3013   IN      A       202.59.19.66

;; AUTHORITY SECTION:
glebeaust.com.au.       3013    IN      NS      ns02.glebeaust.com.au.
glebeaust.com.au.       3013    IN      NS      ns01.glebeaust.com.au.

;; Query time: 0 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Fri Dec 10 10:07:58 2004
;; MSG SIZE  rcvd: 122



$ dig 66-sds.glebeaust.com.au

; <<>> DiG 9.2.1 <<>> 66-sds.glebeaust.com.au
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26525
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;66-sds.glebeaust.com.au.       IN      A

;; ANSWER SECTION:
66-sds.glebeaust.com.au. 2995   IN      A       202.59.19.66

;; AUTHORITY SECTION:
glebeaust.com.au.       2995    IN      NS      ns02.glebeaust.com.au.
glebeaust.com.au.       2995    IN      NS      ns01.glebeaust.com.au.

;; Query time: 0 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Fri Dec 10 10:08:16 2004
;; MSG SIZE  rcvd: 95


--
David Purton
dcpurton@chariot.net.au

For the eyes of the LORD range throughout the earth to
strengthen those whose hearts are fully committed to him.
                                 2 Chronicles 16:9a



--
GPG/PGP --> 0xE736BD7E 5144 6A2D 977A 6651 DFBE 1462 E351 88B9 E736 BD7E


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