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Re: Additional filtering of responses

Mark Andrews <Mark_Andrews@isc.org> Fri, 08 August 2008 02:22 UTC

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To: Edward Lewis <Ed.Lewis@neustar.biz>
Cc: Tony Finch <dot@dotat.at>, Namedroppers <namedroppers@ops.ietf.org>
From: Mark Andrews <Mark_Andrews@isc.org>
Subject: Re: Additional filtering of responses
In-reply-to: Your message of "Thu, 07 Aug 2008 16:44:05 -0400." <a06240800c4c10e41c8a1@[10.31.201.66]>
Date: Fri, 08 Aug 2008 12:17:46 +1000
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> At 20:03 +0100 8/7/08, Tony Finch wrote:
> >On Thu, 7 Aug 2008, Edward Lewis wrote:
> >
> >>  What bothers me about this is that the SERVER: address is not in 
> >>the list (of
> >>  1) addresses authoritative for the zone owning the QNAME. (That 
> >>is, 192.0.2.10
> >>  is not 192.0.2.9.)
> >
> >dig's server is the rDNS, not the aDNS.
> 
> Ok, but still, the aa bit would then make me do some more sanity 
> checking if I were paranoid.
> 
> Is(n't) it true that BIND 9 no longer sets AA bit on answers a'coming 
> through the cache?

	It *never* set AA on answers from the cache.  All remote answers
	go through the cache.

	AA is only set on answers from zone data.

> -- 
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> Edward Lewis                                                +1-571-434-5468
> NeuStar
> 
> Never confuse activity with progress.  Activity pays more.
> 
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews@isc.org

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