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Re: Should a nameserver know about itself?

Mark.Andrews@nominum.com Thu, 10 May 2001 01:54 UTC

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To: Bruce Campbell <bruce.campbell@apnic.net>
Cc: dnsop@cafax.se
From: Mark.Andrews@nominum.com
Subject: Re: Should a nameserver know about itself?
In-reply-to: Your message of "Thu, 10 May 2001 09:50:26 +1000." <Pine.BSF.4.21.0105100927150.43413-100000@julubu.staff.apnic.net>
Date: Thu, 10 May 2001 11:25:26 +1000
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> 
> On Wed, 9 May 2001, James Raftery wrote:
> 
> > And for IE too. An authoritative nameserver is authoritative for a
> > finite set of zones. There is no reason to presume the auth. server's
> > own A RR is in one of the zones it's serving.
> 
> Right.  Now that we've gotten that out of the way, can anyone suggest a
> *reliable* test for verifying that a nameserver is responding ( which is
> seperate from verifying that a nameserver is authoritatively serving a
> given zone )

	Send it a non-recursive query.  A nameserver should always
	answer even if it is just a header containing refused,
	servfail or notimp.

	With this in mind the status opcode would be a good one to
	use.  It should always come back notimp/refused.

	Mark
> 
> -- 
>   Bruce Campbell <bruce.campbell@apnic.net>                +61-7-3367-0490
>                       Systems Administrator                          APNIC
> 
> 
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews@nominum.com

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