[CentOS] how do I find out which nameserver returns a DNS query?

Rudi Ahlers Rudi at SoftDux.com
Mon Jul 7 15:38:22 UTC 2008


Ken Price wrote:
> DIG tells you which server returned the results.  Look for the SERVER 
> line, should be third from the bottom.  If you want to query specific 
> nameservers directly, use dig like this:
>
> dig @ns1.myserver domainname.com
> dig @ns2.myserver domainname.com
>
> etc, etc.
>
> -Ken
>
>
>
> ----- Message from Rudi at SoftDux.com ---------
>     Date: Mon, 07 Jul 2008 17:25:58 +0200
>     From: Rudi Ahlers <Rudi at SoftDux.com>
> Reply-To: CentOS mailing list <centos at centos.org>
>  Subject: [CentOS] how do I find out which nameserver returns a DNS 
> query?
>       To: CentOS mailing list <centos at centos.org>
>
>
>> Hi all
>>
>> If I do a "dig mydomain.co.za" from a Linux server, how do I know which
>> DNS nameserver returns the queries?
>>
>> I seem to have a faulty DNS server, but can't see which one, so I want
>> to find out which nameserver (if there's 4 - ns1.myserver,
>> ns2.myserver, ns3.myserver & ns4.myserver) returns the queries?
>>
>> -- 
>>
>> Kind Regards
>> Rudi Ahlers
>> CEO, SoftDux
>>
>>
>
Hi Ken

I thought dig would return it, but it doesn't.

Look at this:


 dig hfserver1.hostfactor.co.za

; <<>> DiG 9.3.3rc2 <<>> hfserver1.hostfactor.co.za
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17016
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;hfserver1.hostfactor.co.za.    IN      A

;; ANSWER SECTION:
hfserver1.hostfactor.co.za. 6000 IN     A       196.34.136.50

;; Query time: 287 msec
;; SERVER: 4.2.2.1#53(4.2.2.1)
;; WHEN: Mon Jul  7 17:36:45 2008
;; MSG SIZE  rcvd: 60



I know I can dig @server - but I want to know which is the active server 
that returns a result at the moment

-- 

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff




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