[isp-dns] Re: script to list nameservers

[Alex Kamantauskas <alexk@...>]

 Just remember to dig against a resolver that doesn't think its
 authoritative for the domain names in question.

On Tue, 1 Jun 2004, Patrick Giagnocavo +1.717.201.3366 wrote:

> On Tue, Jun 01, 2004 at 11:57:11AM -0400, Andrew P. Kaplan wrote:
> > Does anyone have a script that I can run against my 1000 domains on my
> > master server that would list domain name and authorative name servers. My
> > slave servers is going off line soon and I have been moving the nameserver,
> > but use a range of registrars with some being out of my control so I need a
> > list of domains that still have the old nameservers.
> >
> > Thank you.
> >
> > Andrew P. Kaplan
> > www.cshore.com
>
> Hi Andrew,
>
> Yes, you can use dig.
>
> e.g.
>
> dig zill.net | grep NS | grep -v ";;"
>
> gives:
>
> zill.net.       255324  NS      ns3.zill.net.
> zill.net.       255324  NS      ns1.zill.net.
> zill.net.       255324  NS      ns2.zill.net.
>
> Explanation: dig ns example.com gives you a lot of information, so you
> use grep to only find the NS (nameserver) lines.  There are comments
> that start with ";;" so you pipe it to grep again to tell it to ignore
> those comments.
>
> If you want to get fancier, just add more grep or grep -v commands.
> For instance, if you want to ignore those cases where the proper DNS
> is listed, add "grep -v mydns" where mydns is your nameserver.
>
> Cordially
> --
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-- 
/ak <alexk@...>

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