Re: [Bundled-domain-names] DNS resolution for bundled names

"Jiankang Yao" <yaojk@cnnic.cn> Fri, 12 August 2016 08:58 UTC

Return-Path: <yaojk@cnnic.cn>
X-Original-To: bundled-domain-names@ietfa.amsl.com
Delivered-To: bundled-domain-names@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 01A9E12D0DE for <bundled-domain-names@ietfa.amsl.com>; Fri, 12 Aug 2016 01:58:27 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.148
X-Spam-Level:
X-Spam-Status: No, score=-3.148 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RP_MATCHES_RCVD=-1.247, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] 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 cH4l2R005z9c for <bundled-domain-names@ietfa.amsl.com>; Fri, 12 Aug 2016 01:58:24 -0700 (PDT)
Received: from cnnic.cn (smtp13.cnnic.cn [218.241.118.13]) by ietfa.amsl.com (Postfix) with ESMTP id DA82C12B00A for <bundled-domain-names@ietf.org>; Fri, 12 Aug 2016 01:58:22 -0700 (PDT)
Received: from healthyao-PC (unknown [218.241.103.136]) by ocmail02.zx.nicx.cn (Coremail) with SMTP id AQAAf0BZYAiuj61XP6EBAA--.1418S2; Fri, 12 Aug 2016 16:58:23 +0800 (CST)
Date: Fri, 12 Aug 2016 16:58:13 +0800
From: Jiankang Yao <yaojk@cnnic.cn>
To: John R Levine <johnl@taugh.com>, Bundled-domain-names <bundled-domain-names@ietf.org>
References: <20160425035826.40429.qmail@ary.lan>
X-Priority: 3
X-Has-Attach: no
X-Mailer: Foxmail 7.0.1.92[cn]
Mime-Version: 1.0
Message-ID: <2016081216580612989340@cnnic.cn>
Content-Type: multipart/alternative; boundary="----=_001_NextPart221204300108_=----"
X-CM-TRANSID: AQAAf0BZYAiuj61XP6EBAA--.1418S2
X-Coremail-Antispam: 1UD129KBjvJXoW7Cr4rKw47urWfGF4rKFyrCrg_yoW8GF15pF W3KF1IkrZxGF4Ikwn7ta18XFyfuF40kr1rX3ZxGr98uwn8uFZIgryjy34Y9ay5Xrn5XrWY 9F42q3ZxZayUuaDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBjb7Iv0xC_Kw4lb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rw A2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xII jxv20xvEc7CjxVAFwI0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4 A2jsIEc7CjxVAFwI0_GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG6xAIxVCF xsxG0wAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFV Cjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4xvF2IEb7IF0Fy264kE64k0F24lFcxC0VAY jxAxZF0Ex2IqxwCY02Avz4vE14v_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7 v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUGVWUWwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF 1VAY17CE14v26r1Y6r17MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIx AIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rVWrJr0_WFyU JwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJwCE64 xvF2IEb7IF0Fy7YxBIdaVFxhVjvjDU0xZFpf9x07boWrAUUUUU=
X-CM-SenderInfo: x1dryyw6fq0xffof0/
Archived-At: <https://mailarchive.ietf.org/arch/msg/bundled-domain-names/skO7C6S8xaLEEYcd0LGz_DBNhnc>
Subject: Re: [Bundled-domain-names] DNS resolution for bundled names
X-BeenThere: bundled-domain-names@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
Reply-To: yaojk <yaojk@cnnic.cn>
List-Id: "Discussion of \"bundled domain names\"" <bundled-domain-names.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/bundled-domain-names>, <mailto:bundled-domain-names-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/bundled-domain-names/>
List-Post: <mailto:bundled-domain-names@ietf.org>
List-Help: <mailto:bundled-domain-names-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/bundled-domain-names>, <mailto:bundled-domain-names-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 12 Aug 2016 08:58:27 -0000

From: John Levine
Date: 2016-04-25 11:58
To: bundled-domain-names
CC: yaojk
Subject: Re: [Bundled-domain-names] DNS resolution for bundled names



>The .CAT domain bundles 2LD names, in their case an accented version
>and ASCII version of the name.  They use a DNAME for the accented
>version that points at the unaccented version, which works really
>badly.  Partly that's because the DNAME doesn't redirect itself,
>partly I've found from spot checking that even the 3LD names that the
>DNAME does redirect rarely work in practice, with almost none of web
>servers I checked handling them.
>
>So one part of the work could be looking at BNAME or something like it
>that could make parallel 2LD names work better, both within the same
>TLD and within arbitrary places in the tree.
>

+1

>A separate issue is how one might arrange to have servers for web,
>mail, and so forth automatically configure themselves to do something
>reasonable when a BNAME or DNAME points at them.  Roughly speaking, when
>they get a request for a domain they don't think they handle, they could
>do a DNS lookup on the name and if there's a BNAME or DNAME redirect,
>treat it as equivalent as the redirect target.  I realize that in some
>contexts this has all sorts of security issues but I think it'd be
>possible to carve out a useful subset that's not too dangerous and
>still useful.
>

+1


Jiankang Yao