Re: how do I find out which nameserver returns a DNS query?

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Brian wrote:
On Wed, July 9, 2008 10:17 am, Michael Simpson wrote:
Ok, sorry, let me re-phrase.

I want to know on my own server, which of my nameservers replied to the
DNS
query. In this example 4.2.2.1 is our ISP's upstream DNS server, which
is
configured in /etc/resolv.conf - so it should technically appear there.

But, let's say I query host1.myserver.co.za - and myserver.co.za is on
another server, and has ns1.myserver.co.za, ns2.myserver.co.za,
ns3myserver.co.za & ns4.myserver.co.za

So, as far as I know, any one of those can reply (round robbin DNS?),
but I
would like to know which one replies for this particular dig. Is that
possible? I don't want to specify a server to query, I want to find out
which of the 4 returns the query. If it's a cached reply, does it mean I
won't see it?

At the end of your dig reply you will see the following..

;; Query time: 26 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Jul  9 10:49:40 2008
;; MSG SIZE  rcvd: 297

That tells you which server answered the query.

HTH

________________________________
Hi Brain

I think you have missed a reply on this topic :)

That's the ISP's DNS server you see there.

dig +trace domain is what I needed

--

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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