Return-Path: X-Original-To: rtcweb@ietfa.amsl.com Delivered-To: rtcweb@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6FE8711E819F for ; Mon, 9 Sep 2013 10:01:51 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -102.226 X-Spam-Level: X-Spam-Status: No, score=-102.226 tagged_above=-999 required=5 tests=[AWL=0.372, BAYES_00=-2.599, HTML_MESSAGE=0.001, USER_IN_WHITELIST=-100] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6sY9C9GjaPIE for ; Mon, 9 Sep 2013 10:01:32 -0700 (PDT) Received: from blu0-omc4-s15.blu0.hotmail.com (blu0-omc4-s15.blu0.hotmail.com [65.55.111.154]) by ietfa.amsl.com (Postfix) with ESMTP id B452B21F9D87 for ; Mon, 9 Sep 2013 10:01:30 -0700 (PDT) Received: from BLU169-W24 ([65.55.111.136]) by blu0-omc4-s15.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Mon, 9 Sep 2013 10:01:29 -0700 X-TMN: [ZAouUi/1wypA/3Vbp8WGzApkrjYSeoJ4] X-Originating-Email: [bernard_aboba@hotmail.com] Message-ID: Content-Type: multipart/alternative; boundary="_72251298-e3a3-42af-90dd-d4acfa7eeea6_" From: Bernard Aboba To: cb.list6 , "Hutton, Andrew" Date: Mon, 9 Sep 2013 10:01:28 -0700 Importance: Normal In-Reply-To: References: <20130903094045.23789.92925.idtracker@ietfa.amsl.com>, <5225B1AF.7050906@alvestrand.no>, <9F33F40F6F2CD847824537F3C4E37DDF17BBC905@MCHP04MSX.global-ad.net>, MIME-Version: 1.0 X-OriginalArrivalTime: 09 Sep 2013 17:01:29.0222 (UTC) FILETIME=[3A145A60:01CEAD7E] Cc: "rtcweb@ietf.org" Subject: Re: [rtcweb] draft-ietf-rtcweb-transports-01 TURN/IPV6 RFC 6156. X-BeenThere: rtcweb@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Real-Time Communication in WEB-browsers working group list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Sep 2013 17:01:51 -0000 --_72251298-e3a3-42af-90dd-d4acfa7eeea6_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable > I would specifically state that much of the challenges with NATs are > resolved by preferring IPv6. [BA] That isn't what we've seen in practice=2C since IPv6 addresses (parti= cularly tunnel addresses) may not be routable. So in practice=2C things see= m to work better if IPv4 addresses are preferred and in fact=2C government = profiles such as DISA UCR 2008 require the ability to configure an IPv4 pre= ference. =20 > I would also cover the use case of using TURN to bridge IPv6-only > clients to communicate with IPv4 clients. [BA] Yes=2C this is an important use case (and one that some ICE implementa= tions don't support very well). =20 > It would also be wise to reference RFC6540 to underscore that IPv6 use > is a BCP of the IETF. = --_72251298-e3a3-42af-90dd-d4acfa7eeea6_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

>=3B I would specifically= state that much of the challenges with NATs are
>=3B resolved by pref= erring IPv6.
=3B

[BA] That isn't what we've seen in pract= ice=2C since IPv6 addresses (particularly tunnel addresses) may not be rout= able. =3B

So in practice=2C things seem to work better if IPv= 4 addresses are preferred and in fact=2C government profiles such as DISA U= CR 2008 require the ability to configure an IPv4 preference. =3B

>=3B I would also cover the use case of using TURN to bridge IPv= 6-only
>=3B clients to communicate with IPv4 clients.

[BA] Yes=2C this is an important use case (and one that some ICE i= mplementations don't support very well). =3B

>=3B It w= ould also be wise to reference RFC6540 to underscore that IPv6 use
>= =3B is a BCP of the IETF.

= --_72251298-e3a3-42af-90dd-d4acfa7eeea6_--