Re: Linking a cookie to an IP address is a very bad in 2015...

Martin Thomson <martin.thomson@gmail.com> Thu, 02 April 2015 16:21 UTC

Return-Path: <ietf-http-wg-request+bounce-httpbisa-archive-bis2juki=lists.ie@listhub.w3.org>
X-Original-To: ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com
Delivered-To: ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C1DD61B2D45 for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Thu, 2 Apr 2015 09:21:40 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -7.012
X-Spam-Level:
X-Spam-Status: No, score=-7.012 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_HI=-5, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] 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 WfoGy_Mw2Iz5 for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Thu, 2 Apr 2015 09:21:39 -0700 (PDT)
Received: from frink.w3.org (frink.w3.org [128.30.52.56]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id DC8EE1B2D30 for <httpbisa-archive-bis2Juki@lists.ietf.org>; Thu, 2 Apr 2015 09:21:39 -0700 (PDT)
Received: from lists by frink.w3.org with local (Exim 4.80) (envelope-from <ietf-http-wg-request@listhub.w3.org>) id 1Ydhqf-0000eB-0g for ietf-http-wg-dist@listhub.w3.org; Thu, 02 Apr 2015 16:20:05 +0000
Resent-Date: Thu, 02 Apr 2015 16:20:05 +0000
Resent-Message-Id: <E1Ydhqf-0000eB-0g@frink.w3.org>
Received: from maggie.w3.org ([128.30.52.39]) by frink.w3.org with esmtp (Exim 4.80) (envelope-from <martin.thomson@gmail.com>) id 1Ydhqc-0007wN-Jf for ietf-http-wg@listhub.w3.org; Thu, 02 Apr 2015 16:20:02 +0000
Received: from mail-ob0-f170.google.com ([209.85.214.170]) by maggie.w3.org with esmtps (TLS1.0:RSA_ARCFOUR_SHA1:16) (Exim 4.72) (envelope-from <martin.thomson@gmail.com>) id 1Ydhqb-0007Xc-Pv for ietf-http-wg@w3.org; Thu, 02 Apr 2015 16:20:02 +0000
Received: by obbfy7 with SMTP id fy7so51603454obb.2 for <ietf-http-wg@w3.org>; Thu, 02 Apr 2015 09:19:36 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=3CPx0GRI2hdPffIaQwjiPiThXoecKGgmn8T68ce606M=; b=PNcr/esavsQytVVtUJ+YcUDNLLMFrJquu4IXRkQQHMeNtcM+BjvjhelTDBU69pKgcD X2eN5DNeXHHe/xD4GQGsEl28NdDrKi+rvrVubDDgHNULG1dfCAxiWnvOg9VyqR/ZHuJg +nOH7n5YXuT0XmmEjjcB5uV1lIQXd3Nr2BUXJuMg6Ewt/fawFOc7XkqyP/Y7Y8iVQ0RS CO8KujHAhiqNzbZW3iwJJdEnEoqwWL3pelYn+X/SusVK7l7jgLkEQXFmssPgPat5Y8+f QzWdSNKQcg8IsLGVL7+sOZVoITplTJDNp7PBI1ED1wAFzaBcKWW2M6oSoEBQP+eGNOMb 53GA==
MIME-Version: 1.0
X-Received: by 10.60.84.40 with SMTP id v8mr47524150oey.80.1427991576107; Thu, 02 Apr 2015 09:19:36 -0700 (PDT)
Received: by 10.202.48.151 with HTTP; Thu, 2 Apr 2015 09:19:35 -0700 (PDT)
In-Reply-To: <CACuKZqHDru45jcZiDt91gVtrTZZqJJ2XaK6k0XVKK0R4nCciFg@mail.gmail.com>
References: <D141A3E5.4146E%evyncke@cisco.com> <CACuKZqHDru45jcZiDt91gVtrTZZqJJ2XaK6k0XVKK0R4nCciFg@mail.gmail.com>
Date: Thu, 02 Apr 2015 09:19:35 -0700
Message-ID: <CABkgnnXF72bcAF7STJTwi8c-WmBNWx4GppvW=1HKX7cNX6jWcg@mail.gmail.com>
From: Martin Thomson <martin.thomson@gmail.com>
To: Zhong Yu <zhong.j.yu@gmail.com>
Cc: "Eric Vyncke (evyncke)" <evyncke@cisco.com>, "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>
Content-Type: text/plain; charset="UTF-8"
Received-SPF: pass client-ip=209.85.214.170; envelope-from=martin.thomson@gmail.com; helo=mail-ob0-f170.google.com
X-W3C-Hub-Spam-Status: No, score=-6.9
X-W3C-Hub-Spam-Report: AWL=0.897, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, W3C_AA=-1, W3C_DB=-1, W3C_IRA=-1, W3C_IRR=-3, W3C_WL=-1
X-W3C-Scan-Sig: maggie.w3.org 1Ydhqb-0007Xc-Pv a552da0d91672dd7074c8675ba00f97f
X-Original-To: ietf-http-wg@w3.org
Subject: Re: Linking a cookie to an IP address is a very bad in 2015...
Archived-At: <http://www.w3.org/mid/CABkgnnXF72bcAF7STJTwi8c-WmBNWx4GppvW=1HKX7cNX6jWcg@mail.gmail.com>
Resent-From: ietf-http-wg@w3.org
X-Mailing-List: <ietf-http-wg@w3.org> archive/latest/29219
X-Loop: ietf-http-wg@w3.org
Resent-Sender: ietf-http-wg-request@w3.org
Precedence: list
List-Id: <ietf-http-wg.w3.org>
List-Help: <http://www.w3.org/Mail/>
List-Post: <mailto:ietf-http-wg@w3.org>
List-Unsubscribe: <mailto:ietf-http-wg-request@w3.org?subject=unsubscribe>

On 2 April 2015 at 09:11, Zhong Yu <zhong.j.yu@gmail.com> wrote:
> The server can bind state to the TLS
> session; there's no need for an HTTP cookie, if the site is HTTPS
> only.

I always recommend against that.  Connections break.