Dear Michael,
If its related remote domain NS issue, i shouldn't be able to resolve the
domain from anywhere continously. But i am able to resolve it from internet
without any issue. Problem is with only from our company BIND DNS server only.
Below is the BIND GW Logs:
client 10.1.1.3#63581: view localhost_resolver: query: www.dubaiairport.com IN
A +E
client 10.1.1.3#63836: view localhost_resolver: query: www.dubaiairport.com IN
A +
client 10.1.1.3#62249: view localhost_resolver: query: www.dubaiairport.com IN
A +E
client 10.1.1.3#64215: view localhost_resolver: query: www.dubaiairport.com IN
AAAA +
Below is the sniffer logs:
3.351081 10.0.0.1 --> 213.42.52.75 DNS Standard Query A www.dubaiairport.com
10.761810 10.0.0.2 --> 213.42.75.79 DNS Standard Query A www.dubaiairport.com
Above sniffer logs clearly shows that we are not getting response packet from
www.dubaiairport.com NS.
Regards
Papdheen M
________________________________
From: Michael Sinatra <mich...@rancid.berkeley.edu>
To: babu dheen <babudh...@yahoo.co.in>
Cc: Bind Users Mailing List <bind-users@lists.isc.org>
Sent: Monday, 19 March 2012 11:43 PM
Subject: Re: Name Resolution issue with one domain
On 03/19/12 13:28, babu dheen wrote:
> Dear Support,
> I am trying to resolve www.dubaiairport.com
> <http://www.dubaiairport.com> from my GW BIND server as below. But not
> getting any output
> $ dig A www.dubaiairport.com <http://www.dubaiairport.com>
> ; <<>> DiG 9.3.4-P1 <<>> A www.dubaiairport.com
> <http://www.dubaiairport.com>
> ;; global options: printcmd
> ;; connection timed out; no servers could be reached
> Whereas, when i try through dubaiairport.com NS, i am getting the
> response as below. What could be the problem. Any idea?
> $ dig @213.42.52.79 A www.dubaiairport.com <http://www.dubaiairport.com>
> ; <<>> DiG 9.3.4-P1 <<>> @213.42.52.79 A www.dubaiairport.com
> <http://www.dubaiairport.com>
> ; (1 server found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48514
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
> ;; QUESTION SECTION:
> ;www.dubaiairport.com. IN A
> ;; ANSWER SECTION:
> www.dubaiairport.com <http://www.dubaiairport.com>. 7200 IN A 213.42.55.169
> ;; Query time: 127 msec
> ;; SERVER: 213.42.52.79#53(213.42.52.79)
> ;; WHEN: Mon Mar 19 23:25:35 2012
> ;; MSG SIZE rcvd: 54
When you see this sort of situation, a good guess is that there is an authority
mismatch and some/all of the authoritative NS records listed in the child zone
are not responding. In this case, there is an authority mismatch:
dig +trace ns dubaiairport.com
[skip root response]
dubaiairport.com. 172800 IN NS dcaowa01.dubaiairport.com.
dubaiairport.com. 172800 IN NS svr-b003.dubaiairport.com.
[RRSIG deleted]
;; Received 608 bytes from 192.12.94.30#53(192.12.94.30) in 724 ms
dubaiairport.com. 7200 IN NS secdns.dubaiairport.com.
dubaiairport.com. 7200 IN NS auhans2.ecompany.ae.
dubaiairport.com. 7200 IN NS dxbans2.ecompany.ae.
dubaiairport.com. 7200 IN NS dxbans1.ecompany.ae.
dubaiairport.com. 7200 IN NS dcaowa01.dubaiairport.com.
dubaiairport.com. 7200 IN NS auhans1.ecompany.ae.
dubaiairport.com. 7200 IN NS svr-b003.dubaiairport.com.
;; Received 323 bytes from 213.42.52.79#53(213.42.52.79) in 279 ms
One of the above DNS servers, secdns.dubaiairport.com, isn't responding for
me. Sometimes that's enough to cause intermittent timeouts for dig.
dig +nssearch dubaiairport.com
SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400
7200 from server 213.42.52.79 in 278 ms.
SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400
7200 from server 195.229.237.52 in 278 ms.
SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400
7200 from server 194.170.1.99 in 282 ms.
SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400
7200 from server 213.42.52.75 in 288 ms.
SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400
7200 from server 194.170.1.6 in 289 ms.
SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400
7200 from server 194.170.1.7 in 293 ms.
;; connection timed out; no servers could be reached [referring to
secdns.dubaiairport.com]
michael
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