Re: [DNSOP] Why no more meta-queries? (Was: More work for DNSOP :-)

Shumon Huque <shuque@gmail.com> Tue, 10 March 2015 13:24 UTC

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Date: Tue, 10 Mar 2015 09:24:47 -0400
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From: Shumon Huque <shuque@gmail.com>
To: "W.C.A. Wijngaards" <wouter@nlnetlabs.nl>
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Subject: Re: [DNSOP] Why no more meta-queries? (Was: More work for DNSOP :-)
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On Tue, Mar 10, 2015 at 7:37 AM, W.C.A. Wijngaards <wouter@nlnetlabs.nl>
wrote:

>
> Unbound varies its answers depending on what the authority server is
> doing.  If the authority server inserts such an A or AAAA record in
> the additional section, unbound has code for this case (an AAAA
> inserted for an A query, or an A inserted for an AAAA query).
>

Ah, that's good to know. The code for this case is "insertion into the
resolver's cache" I presume.

What about the side facing the clients? Will unbound insert the gratuitous
A/AAAA in responses to them if they exist in cache? Quick tests I did
suggest not (yet).


> Only for the name that is queried, this to stop poisoning, and this is
> why the code is there (it is a (happy?) side-effect of anti-poison code).
>
>
Yup, that makes perfect sense. Thanks for the details Wouter!

Shumon Huque.