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Date: Tue, 25 Oct 2005 09:37:03 -0500
From: Tim Erlin <listmail@filn.net>
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To: Mohan Singh <mohansingh68@gmail.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: telnetting/netcatting into a DNS server?
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Mohan Singh wrote:
> How would I connect to a nameserver and talk to it so I can know it is
> working? I get as far as connecting to the port, but I don't know how to
> make it send back anything meaningful.

You could use the 'dig' command:

dig @<ip> a yahoo.com

Or you could use 'nmap' with a -sV option, limiting it to port 53/udp or
53/tcp, to actually scan for an application response.

--Tim