Re: [dns-privacy] [Ext] Threat Model

Stephen Farrell <stephen.farrell@cs.tcd.ie> Wed, 06 November 2019 14:48 UTC

Return-Path: <stephen.farrell@cs.tcd.ie>
X-Original-To: dns-privacy@ietfa.amsl.com
Delivered-To: dns-privacy@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5AFA01208B6 for <dns-privacy@ietfa.amsl.com>; Wed, 6 Nov 2019 06:48:42 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -0.965
X-Spam-Level:
X-Spam-Status: No, score=-0.965 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_SBL_CSS=3.335, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=no autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cs.tcd.ie
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 tqNQ6R1THBip for <dns-privacy@ietfa.amsl.com>; Wed, 6 Nov 2019 06:48:40 -0800 (PST)
Received: from mercury.scss.tcd.ie (mercury.scss.tcd.ie [134.226.56.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 356891200F9 for <dns-privacy@ietf.org>; Wed, 6 Nov 2019 06:48:40 -0800 (PST)
Received: from localhost (localhost [127.0.0.1]) by mercury.scss.tcd.ie (Postfix) with ESMTP id 0AF7FBE47; Wed, 6 Nov 2019 14:48:39 +0000 (GMT)
X-Virus-Scanned: Debian amavisd-new at scss.tcd.ie
Received: from mercury.scss.tcd.ie ([127.0.0.1]) by localhost (mercury.scss.tcd.ie [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZOhiTsFF_rBA; Wed, 6 Nov 2019 14:48:37 +0000 (GMT)
Received: from [10.244.2.119] (95-45-153-252-dynamic.agg2.phb.bdt-fng.eircom.net [95.45.153.252]) by mercury.scss.tcd.ie (Postfix) with ESMTPSA id 2336ABE20; Wed, 6 Nov 2019 14:48:37 +0000 (GMT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cs.tcd.ie; s=mail; t=1573051717; bh=/h+lJWLvEY+8B/Wo75y1haCE4T2m7BAMKl1Bq+FTtQs=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=X/30zcvSVt3oSdhAVmCArRyutPNDU/x1BRjLiX3A8TrNWpAJQpqNUKo5N6/6B6/F8 fLkl4pD9v5n9wCnHHDwI3dF5QGRBncsI7tG5XtPKGEbuReXLrBS7QkMU/zFTWAt1H/ sQMIDWuKfb+0dYtHSi5SI8h03mM9rGwR0Zk+vEuM=
To: Paul Wouters <paul@nohats.ca>, Ralf Weber <dns@fl1ger.de>
Cc: dns-privacy@ietf.org, Warren Kumari <warren@kumari.net>
References: <CABcZeBMQEJ=LE8ATQYnJj59srsK47hf4HT3BMMg3X2crVfSUXQ@mail.gmail.com> <CAHw9_iLz5No-SKa74To03ida3DHfeKY58CrJFJpLph8FsvzNQQ@mail.gmail.com> <CABcZeBMFDbATVRvJvvs5b4giQ=0B82i76ahv-ffDgWJOzqZccw@mail.gmail.com> <CAHw9_i+e8veeAz+KYXjvchmjKJz6OZHX1pEYx_Tvs8n5xnfBnQ@mail.gmail.com> <6D6233DC-4D7C-45BC-9D4E-08E6E882C1A5@nohats.ca> <alpine.DEB.2.20.1911042035571.29247@grey.csi.cam.ac.uk> <CAH1iCioH86q1CX7A+F8ON4uzpGqipUy8m3iczyNqSKirAsYBQg@mail.gmail.com> <alpine.LRH.2.21.1911041652450.5093@bofh.nohats.ca> <CABcZeBOtY3saJe5DWTu=Jqy5guqdoKPKSR+XYddbvxwxKsxmig@mail.gmail.com> <CAHw9_iKaeT0VEjZfoCi9Nddc+VBBj0JHWDHv+=g3xzvb6L+Nvg@mail.gmail.com> <alpine.LRH.2.21.1911050941090.30046@bofh.nohats.ca> <CAHw9_i+MxMCd7dDO7N0-hc1SDjvBeoLoUvbg4JWDzXyjR0u4xQ@mail.gmail.com> <alpine.LRH.2.21.1911051437000.11602 @bofh.nohats.ca> <CAHw9_iKhaA9Nb+eH92YfzdepU90_DgLyS-ZDaMAehKOFO0ksEA@mail.gmail.com> <FC51D8EC-5ADC-4415-82EB-C6C6E4E8D84A@fl1ger.de> <F0DD4028-2404-4232-90F8-E9937877C261@nohats.ca>
From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
Autocrypt: addr=stephen.farrell@cs.tcd.ie; prefer-encrypt=mutual; keydata= mQINBFo9UDIBEADUH4ZPcUnX5WWRWO4kEkHea5Y5eEvZjSwe/YA+G0nrTuOU9nemCP5PMvmh 5Cg8gBTyWyN4Z2+O25p9Tja5zUb+vPMWYvOtokRrp46yhFZOmiS5b6kTq0IqYzsEv5HI58S+ QtaFq978CRa4xH9Gi9u4yzUmT03QNIGDXE37honcAM4MOEtEgvw4fVhVWJuyy3w//0F2tzKr EMjmL5VGuD/Q9+G/7abuXiYNNd9ZFjv4625AUWwy+pAh4EKzS1FE7BOZp9daMu9MUQmDqtZU bUv0Q+DnQAB/4tNncejJPz0p2z3MWCp5iSwHiQvytYgatMp34a50l6CWqa13n6vY8VcPlIqO Vz+7L+WiVfxLbeVqBwV+4uL9to9zLF9IyUvl94lCxpscR2kgRgpM6A5LylRDkR6E0oudFnJg b097ZaNyuY1ETghVB5Uir1GCYChs8NUNumTHXiOkuzk+Gs4DAHx/a78YxBolKHi+esLH8r2k 4LyM2lp5FmBKjG7cGcpBGmWavACYEa7rwAadg4uBx9SHMV5i33vDXQUZcmW0vslQ2Is02NMK 7uB7E7HlVE1IM1zNkVTYYGkKreU8DVQu8qNOtPVE/CdaCJ/pbXoYeHz2B1Nvbl9tlyWxn5Xi HzFPJleXc0ksb9SkJokAfwTSZzTxeQPER8la5lsEEPbU/cDTcwARAQABtDJTdGVwaGVuIEZh cnJlbGwgKDIwMTcpIDxzdGVwaGVuLmZhcnJlbGxAY3MudGNkLmllPokCQAQTAQgAKgIbAwUJ CZQmAAULCQgHAgYVCAkKCwIEFgIDAQIeAQIXgAUCWj6jdwIZAQAKCRBasvrxexcr6o7QD/9m x9DPJetmW794RXmNTrbTJ44zc/tJbcLdRBh0KBn9OW/EaAqjDmgNJeCMyJTKr1ywaps8HGUN hLEVkc14NUpgi4/Zkrbi3DmTp25OHj6wXBS5qVMyVynTMEIjOfeFFyxG+48od+Xn7qg6LT7G rHeNf+z/r0v9+8eZ1Ip63kshQDGhhpmRMKu4Ws9ZvTW2ACXkkTFaSGYJj3yIP4R6IgwBYGMz DXFX6nS4LA1s3pcPNxOgrvCyb60AiJZTLcOk/rRrpZtXB1XQc23ZZmrlTkl2HaThL6w3YKdi Ti1NbuMeOxZqtXcUshII45sANm4HuWNTiRh93Bn5bN6ddjgsaXEZBKUBuUaPBl7gQiQJcAlS 3MmGgVS4ZoX8+VaPGpXdQVFyBMRFlOKOC5XJESt7wY0RE2C8PFm+5eywSO/P1fkl9whkMgml 3OEuIQiP2ehRt/HVLMHkoM9CPQ7t6UwdrXrvX+vBZykav8x9U9M6KTgfsXytxUl6Vx5lPMLi 2/Jrsz6Mzh/IVZa3xjhq1OLFSI/tT2ji4FkJDQbO+yYUDhcuqfakDmtWLMxecZsY6O58A/95 8Qni6Xeq+Nh7zJ7wNcQOMoDGj+24di2TX1cKLzdDMWFaWzlNP5dB5VMwS9Wqj1Z6TzKjGjru q8soqohwb2CK9B3wzFg0Bs1iBI+2RuFnxLkCDQRaPVAyARAA+g3R0HzGr/Dl34Y07XqGqzq5 SU0nXIu9u8Ynsxj7gR5qb3HgUWYEWrHW2jHOByXnvkffucf5yzwrsvw8Q8iI8CFHiTYHPpey 4yPVn6R0w/FOMcY70eTIu/k6EEFDlDbs09DtKcrsT9bmN0XoRxITlXwWTufYqUnmS+YkAuk+ TLCtUin7OdaS2uU6Ata3PLQSeM2ZsUQMmYmHPwB9rmf+q2I005AJ9Q1SPQ2KNg/8xOGxo13S VuaSqYRQdpV93RuCOzg4vuXtR+gP0KQrus/P2ZCEPvU9cXF/2MIhXgOz207lv3iE2zGyNXld /n8spvWk+0bH5Zqd9Wcba/rGcBhmX9NKKDARZqjkv/zVEP1X97w1HsNYeUFNcg2lk9zQKb4v l1jx/Uz8ukzH2QNhU4R39dbF/4AwWuSVkGW6bTxHJqGs6YimbfdQqxTzmqFwz3JP0OtXX5q/ 6D4pHwcmJwEiDNzsBLl6skPSQ0Xyq3pua/qAP8MVm+YxCxJQITqZ8qjDLzoe7s9X6FLLC/DA L9kxl5saVSfDbuI3usH/emdtn0NA9/M7nfgih92zD92sl1yQXHT6BDa8xW1j+RU4P+E0wyd7 zgB2UeYgrp2IIcfG+xX2uFG5MJQ/nYfBoiALb0+dQHNHDtFnNGY3Oe8z1M9c5aDG3/s29QbJ +w7hEKKo9YMAEQEAAYkCJQQYAQgADwUCWj1QMgIbDAUJCZQmAAAKCRBasvrxexcr6qwvD/9b Rek3kfN8Q+jGrKl8qwY8HC5s4mhdDJZI/JP2FImf5J2+d5/e8UJ4fcsT79E0/FqX3Z9wZr6h sofPqLh1/YzDsYkZDHTYSGrlWGP/I5kXwUmFnBZHzM3WGrL3S7ZmCYMdudhykxXXjq7M6Do1 oxM8JofrXGtwBTLv5wfvvygJouVCVe87Ge7mCeY5vey1eUi4zSSF1zPpR6gg64w2g4TXM5qt SwkZVOv1g475LsGlYWRuJV8TA67yp1zJI7HkNqCo8KyHX0DPOh9c+Sd9ZX4aqKfqH9HIpnCL AYEgj7vofeix7gM3kQQmwynqq32bQGQBrKJEYp2vfeO30VsVx4dzuuiC5lyjUccVmw5D72J0 FlGrfEm0kw6D1qwyBg0SAMqamKN6XDdjhNAtXIaoA2UMZK/vZGGUKbqTgDdk0fnzOyb2zvXK CiPFKqIPAqKaDHg0JHdGI3KpQdRNLLzgx083EqEc6IAwWA6jSz+6lZDV6XDgF0lYqAYIkg3+ 6OUXUv6plMlwSHquiOc/MQXHfgUP5//Ra5JuiuyCj954FD+MBKIj8eWROfnzyEnBplVHGSDI ZLzL3pvV14dcsoajdeIH45i8DxnVm64BvEFHtLNlnliMrLOrk4shfmWyUqNlzilXN2BTFVFH 4MrnagFdcFnWYp1JPh96ZKjiqBwMv/H0kw==
Message-ID: <b7108cff-0e50-d168-aa49-2626eb83ee22@cs.tcd.ie>
Date: Wed, 06 Nov 2019 14:48:35 +0000
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2
MIME-Version: 1.0
In-Reply-To: <F0DD4028-2404-4232-90F8-E9937877C261@nohats.ca>
Content-Type: multipart/signed; micalg="pgp-sha512"; protocol="application/pgp-signature"; boundary="iMAFagFY1E1TRiwrgMmxz0rABCEXDxSNk"
Archived-At: <https://mailarchive.ietf.org/arch/msg/dns-privacy/1nrTk7wRdLrD0WOFV553yQh9KS4>
Subject: Re: [dns-privacy] [Ext] Threat Model
X-BeenThere: dns-privacy@ietf.org
X-Mailman-Version: 2.1.29
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: Wed, 06 Nov 2019 14:48:42 -0000

Hiya,

On 06/11/2019 14:15, Paul Wouters wrote:
> 
>> On Nov 6, 2019, at 04:24, Ralf Weber <dns@fl1ger.de> wrote:
>>
>>
>>> 4: without expecting everyone to support DNSSEC.
>> Really. I can not see how we design something new that does not take DNSSEC into account.
> 
> Indeed. The longer we treat DNSSEC as optional, the longer we will be faced with adoption problems, exactly as with IPv6.
> 
> We talk a lot about the DNS camel, but the “avoid DNSSEC” camel has quite the number of pages in RFCs now.

Interesting. I read Warren's text as being "don't require
DNSSEC having been deployed" while you and Ralf seem to be
reading the same text as "don't take DNSSEC into account"
or "avoid DNSSEC."

I'm fine with Warren's text FWIW. ISTM that ~1% deployment
after this elapsed time means that depending on DNSSEC
deployment is just... unwise. ("Unwise" wasn't the first
word I typed there btw;-) Being to be able to benefit
from DNSSEC deployment is a good thing, but a different
thing. I also think trying to avoid or ignore DNSSEC is
almost but not quite as unwise as requiring DNSSEC
deployment.

Maybe these different interpretations of the same text
are indicators that many of us are reading too much
between too many lines?

Cheers,
S.



> 
> Paul
> _______________________________________________
> dns-privacy mailing list
> dns-privacy@ietf.org
> https://www.ietf.org/mailman/listinfo/dns-privacy
>