Re: [DNSOP] why did SRV care to avoid conflicts

Mark Andrews <marka@isc.org> Mon, 26 March 2018 23:23 UTC

Return-Path: <marka@isc.org>
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 B4EA9126C25 for <dnsop@ietfa.amsl.com>; Mon, 26 Mar 2018 16:23:30 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.911
X-Spam-Level:
X-Spam-Status: No, score=-6.911 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] 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 KwAEXBuht-8R for <dnsop@ietfa.amsl.com>; Mon, 26 Mar 2018 16:23:29 -0700 (PDT)
Received: from mx.pao1.isc.org (mx.pao1.isc.org [IPv6:2001:4f8:0:2::2b]) (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 056F51277BB for <dnsop@ietf.org>; Mon, 26 Mar 2018 16:23:29 -0700 (PDT)
Received: from zmx1.isc.org (zmx1.isc.org [149.20.0.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx.pao1.isc.org (Postfix) with ESMTPS id 951DE3AB03E; Mon, 26 Mar 2018 23:23:28 +0000 (UTC)
Received: from zmx1.isc.org (localhost [127.0.0.1]) by zmx1.isc.org (Postfix) with ESMTPS id 7920416006B; Mon, 26 Mar 2018 23:23:28 +0000 (UTC)
Received: from localhost (localhost [127.0.0.1]) by zmx1.isc.org (Postfix) with ESMTP id 5E987160070; Mon, 26 Mar 2018 23:23:28 +0000 (UTC)
Received: from zmx1.isc.org ([127.0.0.1]) by localhost (zmx1.isc.org [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id ZmhTPhYrY0eY; Mon, 26 Mar 2018 23:23:28 +0000 (UTC)
Received: from [172.30.42.90] (c27-253-115-14.carlnfd2.nsw.optusnet.com.au [27.253.115.14]) by zmx1.isc.org (Postfix) with ESMTPSA id ACBB616006B; Mon, 26 Mar 2018 23:23:27 +0000 (UTC)
Content-Type: text/plain; charset="utf-8"
Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\))
From: Mark Andrews <marka@isc.org>
In-Reply-To: <5AB97728.70202@redbarn.org>
Date: Tue, 27 Mar 2018 10:23:25 +1100
Cc: "dnsop@ietf.org" <dnsop@ietf.org>
Content-Transfer-Encoding: quoted-printable
Message-Id: <23B89A43-06D8-48B3-B8AD-7DAA3A5FD9A9@isc.org>
References: <5AB96F3C.4090204@redbarn.org> <A400D2A3-3866-4EE3-879B-479991581502@isc.org> <265EBB42-4042-40BE-88C5-F3FEB6540DA6@isc.org> <5AB97728.70202@redbarn.org>
To: Paul Vixie <paul@redbarn.org>
X-Mailer: Apple Mail (2.3273)
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/UFNxnb8pcrxlmdCETtiAPpwFAi0>
Subject: Re: [DNSOP] why did SRV care to avoid conflicts
X-BeenThere: dnsop@ietf.org
X-Mailman-Version: 2.1.22
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: Mon, 26 Mar 2018 23:23:31 -0000

COM and the root for that matter still potentially need to advertise services associated with their roll of being a registry.

e.g. _whois._tcp.com


Mark

> On 27 Mar 2018, at 9:41 am, Paul Vixie <paul@redbarn.org> wrote:
> 
> 
> 
> Mark Andrews wrote:
>> But the real reason for using _blah is so you can split ownership of
>> tcp.com from _tcp.com which you couldn’t do if the well know label names
>> used the preferred name format (LDH) is it would be “tcp” rather than “_tcp”.
> 
> in my day, COM wasn't a service identifier, and its subdomains were all delegation points, so all had NS RRsets, some had DS RRsets, and if one wanted a service name like MARKA.COM, the SRV named _TCP (or just TCP, if i were doing it today) would be inside the MARKA zone, as a child of the apex.
> 
> -- 
> P Vixie
> 

-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka@isc.org