IETF Logo Mail Archive

Re: [dns-privacy] Early port allocation request for dns-over-TLS

"Wessels, Duane" <dwessels@verisign.com> Mon, 17 August 2015 16:03 UTC

Return-Path: <dwessels@verisign.com>
X-Original-To: dns-privacy@ietfa.amsl.com
Delivered-To: dns-privacy@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 324441B2E96 for <dns-privacy@ietfa.amsl.com>; Mon, 17 Aug 2015 09:03:44 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.6
X-Spam-Level:
X-Spam-Status: No, score=-2.6 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7] 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 6iriDPkcruYj for <dns-privacy@ietfa.amsl.com>; Mon, 17 Aug 2015 09:03:38 -0700 (PDT)
Received: from mail-oi0-f100.google.com (mail-oi0-f100.google.com [209.85.218.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C972D1B2E8C for <dns-privacy@ietf.org>; Mon, 17 Aug 2015 09:03:36 -0700 (PDT)
Received: by oiev193 with SMTP id v193so5581080oie.0 for <dns-privacy@ietf.org>; Mon, 17 Aug 2015 09:03:36 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:thread-topic:thread-index :date:message-id:references:in-reply-to:accept-language :content-language:content-type:mime-version; bh=Aer3Z7Wu07l1yCJtah/bj0CymCCgw6gDHeMgdlhYQ0s=; b=H5v1g6MsVf/MfHoR65g/UYgY1xmTT5F1JsZTmqADZgGo3tHm1d872Bo7sCYRVJJwGK RnsBrCGmmYoRQtob2CQaHUsCb0lavGRCupeRSR5yb4zjTCoKJi+jjMl05JqeH8hEp9CR LEXfqaptW0Ky6K0X+E38Q52mlI84wpM0Ovt3ao25yRQaIlag56lOWOSVkGBryncXCGab HyD13VMI5bjwja9ExlrTZKyICekd9JG+eSUxPUZQ7mcqEvkx3yVKCKm6/QpnP5Ih+sk5 UXLwwo/E6NsMXdV0CepfqN0sX8lTHI7NEGbm5Ekab4LzAmTL+GUaB9raxJscpJzSyRdW Vwbg==
X-Gm-Message-State: ALoCoQm0iOOchexgh1qP83/R4YR5XsjrWyWjdiWZ2kP/ngZSnPZZ+JjE8qEXx3DY2/3V5W0P/jV7tZMnzvbZfW6hdBYb36T9Sg==
X-Received: by 10.55.17.137 with SMTP id 9mr3649990qkr.15.1439827415529; Mon, 17 Aug 2015 09:03:35 -0700 (PDT)
Received: from brn1lxmailout02.verisign.com (brn1lxmailout02.verisign.com. [72.13.63.42]) by smtp-relay.gmail.com with ESMTPS id s89sm1549766qkl.1.2015.08.17.09.03.35 (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 17 Aug 2015 09:03:35 -0700 (PDT)
X-Relaying-Domain: verisign.com
Received: from brn1wnexcas02.vcorp.ad.vrsn.com (brn1wnexcas02 [10.173.152.206]) by brn1lxmailout02.verisign.com (8.13.8/8.13.8) with ESMTP id t7HG3Ysh021119 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Mon, 17 Aug 2015 12:03:34 -0400
Received: from BRN1WNEXMBX01.vcorp.ad.vrsn.com ([::1]) by brn1wnexcas02.vcorp.ad.vrsn.com ([::1]) with mapi id 14.03.0174.001; Mon, 17 Aug 2015 12:03:33 -0400
From: "Wessels, Duane" <dwessels@verisign.com>
To: Warren Kumari <warren@kumari.net>
Thread-Topic: [dns-privacy] Early port allocation request for dns-over-TLS
Thread-Index: AQHQ1F+QFNx/l+p6c0mSMQFTx6c7f54Qf2aAgAAneQA=
Date: Mon, 17 Aug 2015 16:03:33 +0000
Message-ID: <ACC0BEF3-BF37-47CB-8188-37EE2AD1E5F4@verisign.com>
References: <CAHw9_iJ8QPyHqg2emJm4RfSnsiUcHFY7tGS3K9nL5HJYTyww_Q@mail.gmail.com> <55CA382A.9020707@isi.edu> <CAHw9_iJEHztVOdsLZz6Xtmk-UK+CTdrrJFnk3Ojh1-9-+0dD7Q@mail.gmail.com>
In-Reply-To: <CAHw9_iJEHztVOdsLZz6Xtmk-UK+CTdrrJFnk3Ojh1-9-+0dD7Q@mail.gmail.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
x-originating-ip: [10.173.152.4]
Content-Type: multipart/signed; boundary="Apple-Mail=_F6D1714C-0A24-45ED-A2FD-99CD038E7AA4"; protocol="application/pkcs7-signature"; micalg="sha1"
MIME-Version: 1.0
Archived-At: <http://mailarchive.ietf.org/arch/msg/dns-privacy/jCEhpyRJp7KyrQeXZql2jd1gzN4>
Cc: "dns-privacy@ietf.org" <dns-privacy@ietf.org>, Joe Touch <touch@isi.edu>
Subject: Re: [dns-privacy] Early port allocation request for dns-over-TLS
X-BeenThere: dns-privacy@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: <dns-privacy.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dns-privacy>, <mailto:dns-privacy-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dns-privacy/>
List-Post: <mailto:dns-privacy@ietf.org>
List-Help: <mailto:dns-privacy-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dns-privacy>, <mailto:dns-privacy-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 17 Aug 2015 16:03:44 -0000

> On Aug 17, 2015, at 6:42 AM, Warren Kumari <warren@kumari.net> wrote:
> 
> On Tue, Aug 11, 2015 at 2:00 PM, Joe Touch <touch@isi.edu> wrote:
>> 
>> Hi, Warren,
>> 
>> It might be useful to summarize on this list the rationale for this
>> allocation and the plan for its use.
>> 
>> In particular:
>> 
>>        - why port 53 is not sufficient using STARTTLS
>> 
> 
> - The WG decided that using a new port instead of a STARTTLS or
> octet-matching would better suite our operational goals.
> We had significant discussions on this, and we have concerns about
> things like middle boxes reacting to non-DNS on 53.

Additionally:

- A separate port avoids the 1xRTT incurred by STARTTLS negotiation.

- DNS-over-DTLS can't use STARTTLS (at least not as currently described), although
it does claim that it can run on port 53.  That relies on an unaware server
mis-interpreting a DTLS ClientHello message as a DNS message with Opcode=15.  That,
in turn, takes Opcode 15 off the table for future allocation, etc.


DW

v2.23.0 | Report a Bug | By Email