[dnssd] UTF8 use in DNS populated by mDNS

Douglas Otis <doug.mtview@gmail.com> Thu, 20 November 2014 00:50 UTC

Return-Path: <doug.mtview@gmail.com>
X-Original-To: dnssd@ietfa.amsl.com
Delivered-To: dnssd@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E26E91A8823 for <dnssd@ietfa.amsl.com>; Wed, 19 Nov 2014 16:50:46 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, SPF_PASS=-0.001] autolearn=ham
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 R198gEZ98Xkt for <dnssd@ietfa.amsl.com>; Wed, 19 Nov 2014 16:50:42 -0800 (PST)
Received: from mail-qc0-x234.google.com (mail-qc0-x234.google.com [IPv6:2607:f8b0:400d:c01::234]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E519A1A876F for <dnssd@ietf.org>; Wed, 19 Nov 2014 16:50:41 -0800 (PST)
Received: by mail-qc0-f180.google.com with SMTP id i8so1434875qcq.11 for <dnssd@ietf.org>; Wed, 19 Nov 2014 16:50:41 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:content-transfer-encoding:date:subject:to :message-id:mime-version; bh=cTPWsmjECnVcnOfmKZWtq67W9I9uZqktudQeTe5Doys=; b=Xs+beRYWw9hrJIkb4BjUpsfY4G3QxgGBckaVaG8jvXZfK58fA9XA8drMVdYZRI6tKT E+RTrQBG1S+hv0QB+cW/w9Q27ckzuGR3R0pG/47KMXmz8jANYdOEdusEq40IoR+B78M8 196zf9vQ3BqZEnJpZEuwEsKCsXIfL4rrTdBYEBN/HnphdfmnNc85Q1hgUjQ3NT6FHEpC FbfYII3Kk2lZfEfD5wQTPtLL33K5TfQKVH5wfcKsNc0esLoQU1qTGyfQjVPJBuMmORtn pHhrsXg6IEXKDg9oTWJPDk6ZnwfpEwWpeN9axeDwH5RdgbFS/1zZsNIZWuhWm2bkSbMh W9Kw==
X-Received: by 10.140.95.225 with SMTP id i88mr54877223qge.2.1416444641166; Wed, 19 Nov 2014 16:50:41 -0800 (PST)
Received: from [192.168.0.54] (107-0-5-6-ip-static.hfc.comcastbusiness.net. [107.0.5.6]) by mx.google.com with ESMTPSA id 4sm761644qah.46.2014.11.19.16.50.40 for <multiple recipients> (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 19 Nov 2014 16:50:40 -0800 (PST)
From: Douglas Otis <doug.mtview@gmail.com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Date: Wed, 19 Nov 2014 16:50:39 -0800
To: dnssd@ietf.org
Message-Id: <0996A6E1-5218-4AFB-8646-D1047266C9ED@gmail.com>
Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\))
X-Mailer: Apple Mail (2.1878.6)
Archived-At: http://mailarchive.ietf.org/arch/msg/dnssd/4sMGbmeythXDDPnwWiQyEvkYhlQ
Subject: [dnssd] UTF8 use in DNS populated by mDNS
X-BeenThere: dnssd@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: "Discussion of extensions to Bonjour \(mDNS and DNS-SD\) for routed networks." <dnssd.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dnssd>, <mailto:dnssd-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/dnssd/>
List-Post: <mailto:dnssd@ietf.org>
List-Help: <mailto:dnssd-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dnssd>, <mailto:dnssd-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 20 Nov 2014 00:50:47 -0000

  
Dear Dnssd Wg,

If UTF-8 is to be permitted in DNS populated using mDNS inputs, a superset of rules directly and indirectly established to support safe use of IDNA labels are necessary, otherwise omitting such requirements would permit trivial spoofing.  The requirements should include IDNA2008 considerations that restrict permitted code points.  It seems some advocate use of spaces in a domain name label be permitted.  Even this minor change may confuse users about the specific domain when seen with respect to commandline based applications.

Regards,
Douglas Otis