Re: [DNSOP] Mandated order of CNAME records in a CNAME chain?

Florian Weimer <fw@deneb.enyo.de> Sun, 02 October 2016 07:55 UTC

From: Florian Weimer <fw@deneb.enyo.de>
To: Robert Edmonds <edmonds@mycre.ws>
References: <20160929123532.GD22645@laperouse.bortzmeyer.org> <20160929130333.qsrjntfgmrobj7i2@mycre.ws>
Date: Sun, 02 Oct 2016 09:55:26 +0200
In-Reply-To: <20160929130333.qsrjntfgmrobj7i2@mycre.ws> (Robert Edmonds's message of "Thu, 29 Sep 2016 09:03:33 -0400")
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Subject: Re: [DNSOP] Mandated order of CNAME records in a CNAME chain?
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* Robert Edmonds:

> I think there was already a thread on this topic recently on this list
> ("Order of CNAME and A in Authoritative Reply" from August 2015). There
> was some discussion over "adding" versus "appending" and it was pointed
> out that a lot of existing code (e.g., the BSD stub resolver) was
> written using the "add at the end" meaning.

Are there stub resolvers which actually chase the CNAME chain?

I assume it is quite common just to check the QNAME, and then extract
A/AAAA records from the answer section without matching their owner
names (but potentially recording their owner name as the “canonical
name” of the host, even though that's rarely useful these days).

[DNSOP] Mandated order of CNAME records in a CNAM… Stephane Bortzmeyer
Re: [DNSOP] Mandated order of CNAME records in a … Robert Edmonds
Re: [DNSOP] Mandated order of CNAME records in a … Viktor Dukhovni
Re: [DNSOP] Mandated order of CNAME records in a … John Levine
Re: [DNSOP] Mandated order of CNAME records in a … Florian Weimer
Re: [DNSOP] Mandated order of CNAME records in a … Mark Andrews
Re: [DNSOP] Mandated order of CNAME records in a … John R Levine
Re: [DNSOP] Mandated order of CNAME records in a … Florian Weimer