Re: [DNSOP] Where in a CNAME chain is the QNAME?

Stephane Bortzmeyer <bortzmeyer@nic.fr> Fri, 23 September 2016 08:23 UTC

Return-Path: <bortzmeyer@nic.fr>
X-Original-To: dnsop@ietfa.amsl.com
Delivered-To: dnsop@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 417F512B55D for <dnsop@ietfa.amsl.com>; Fri, 23 Sep 2016 01:23:15 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -9.216
X-Spam-Level:
X-Spam-Status: No, score=-9.216 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-2.316] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9CpCmRQtPrPf for <dnsop@ietfa.amsl.com>; Fri, 23 Sep 2016 01:23:13 -0700 (PDT)
Received: from mx4.nic.fr (mx4.nic.fr [IPv6:2001:67c:2218:2::4:12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A159E12BA9A for <dnsop@ietf.org>; Fri, 23 Sep 2016 01:23:13 -0700 (PDT)
Received: from mx4.nic.fr (localhost [127.0.0.1]) by mx4.nic.fr (Postfix) with SMTP id 8A9812806F2 for <dnsop@ietf.org>; Fri, 23 Sep 2016 10:23:11 +0200 (CEST)
Received: from relay2.nic.fr (relay2.nic.fr [192.134.4.163]) by mx4.nic.fr (Postfix) with ESMTP id 84FD12806D4 for <dnsop@ietf.org>; Fri, 23 Sep 2016 10:23:11 +0200 (CEST)
Received: from b12.nic.fr (b12.tech.ipv6.nic.fr [IPv6:2001:67c:1348:7::86:133]) by relay2.nic.fr (Postfix) with ESMTP id C4124B3804F for <dnsop@ietf.org>; Fri, 23 Sep 2016 10:22:32 +0200 (CEST)
Received: by b12.nic.fr (Postfix, from userid 1000) id BE2E24013B; Fri, 23 Sep 2016 10:22:32 +0200 (CEST)
Date: Fri, 23 Sep 2016 10:22:32 +0200
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: dnsop@ietf.org
Message-ID: <20160923082232.6j2jlr4wqp2fxs56@nic.fr>
References: <20160920161350.GA3288@laperouse.bortzmeyer.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20160920161350.GA3288@laperouse.bortzmeyer.org>
X-Operating-System: Debian GNU/Linux stretch/sid
X-Kernel: Linux 4.6.0-1-amd64 x86_64
X-Charlie: Je suis Charlie
Organization: NIC France
X-URL: http://www.nic.fr/
User-Agent: NeoMutt/20160910 (1.7.0)
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/yzrJJBGv_TH9i0Z7fnyjvufvG1k>
Subject: Re: [DNSOP] Where in a CNAME chain is the QNAME?
X-BeenThere: dnsop@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: IETF DNSOP WG mailing list <dnsop.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dnsop>, <mailto:dnsop-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dnsop/>
List-Post: <mailto:dnsop@ietf.org>
List-Help: <mailto:dnsop-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dnsop>, <mailto:dnsop-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 23 Sep 2016 08:23:15 -0000

On Tue, Sep 20, 2016 at 06:13:50PM +0200,
 Stephane Bortzmeyer <bortzmeyer@nic.fr> wrote 
 a message of 68 lines which said:

> This issue was spotted by Peter van Dijk. It is about
> draft-ietf-dnsop-nxdomain-cut-05, recently approved by IESG. The
> problem is the definition of "QNAME" when there is a CNAME chain.

OK, after reading the discussion, my opinion, as an author (but I'll
of course defer the decision to the working group, the WG chairs, the
RFC editor and the flying spaghetti monster):

The re-definition of QNAME by RFC 2308 is awkward and does not match
the general usage, or the previous definitions. Therefore, I prefer to
keep the "common sense" usage "QNAME is the owner name of the record
in the Question Section". Which means that, in my example, the QNAME
is "www.afnic.fr" and the current text of
draft-ietf-dnsop-nxdomain-cut-05 is correct.