IETF Logo Mail Archive

Re: [Ntp] Antw: [EXT] Re: New Version Notification for draft-gruessing-ntp-ntpv5-requirements-03.txt

Hal Murray <halmurray+ietf@sonic.net> Mon, 18 October 2021 21:13 UTC

Return-Path: <halmurray+ietf@sonic.net>
X-Original-To: ntp@ietfa.amsl.com
Delivered-To: ntp@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 464723A0C93 for <ntp@ietfa.amsl.com>; Mon, 18 Oct 2021 14:13:08 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.898
X-Spam-Level:
X-Spam-Status: No, score=-1.898 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
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 nGPfPOvN33GM for <ntp@ietfa.amsl.com>; Mon, 18 Oct 2021 14:13:02 -0700 (PDT)
Received: from c.mail.sonic.net (c.mail.sonic.net [64.142.111.80]) (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 A41FA3A0C92 for <ntp@ietf.org>; Mon, 18 Oct 2021 14:13:02 -0700 (PDT)
Received: from 107-137-68-211.lightspeed.sntcca.sbcglobal.net (107-137-68-211.lightspeed.sntcca.sbcglobal.net [107.137.68.211]) (authenticated bits=0) by c.mail.sonic.net (8.15.1/8.15.1) with ESMTPSA id 19ILD1C8006311 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Mon, 18 Oct 2021 14:13:01 -0700
Received: from hgm (localhost [IPv6:::1]) by 107-137-68-211.lightspeed.sntcca.sbcglobal.net (Postfix) with ESMTP id 15C8C28C0F3; Mon, 18 Oct 2021 14:13:01 -0700 (PDT)
X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7.1
To: Danny Mayer <mayer@pdmconsulting.net>
cc: "ntp@ietf.org" <ntp@ietf.org>, Hal Murray <halmurray+ietf@sonic.net>
From: Hal Murray <halmurray+ietf@sonic.net>
In-Reply-To: Message from Danny Mayer <mayer@pdmconsulting.net> of "Mon, 18 Oct 2021 10:16:52 -0400." <d5585147-4a76-3869-03c9-81675d3bba65@pdmconsulting.net>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Date: Mon, 18 Oct 2021 14:13:01 -0700
Message-Id: <20211018211301.15C8C28C0F3@107-137-68-211.lightspeed.sntcca.sbcglobal.net>
X-Sonic-CAuth: UmFuZG9tSVbkMJYkpG6vVgNdqdx2mL0B7l43qy+2pzhH4mhHKbCL7gUZYxziVjEYh9z3snYhXSQJTQqQU3xbNi2QrYcadAVxy4sflll0tro=
X-Sonic-ID: C;FEcLLVgw7BGA2yx66Nu5DA== M;zOI5LVgw7BGA2yx66Nu5DA==
X-Sonic-Spam-Details: -1.5/5.0 by cerberusd
Archived-At: <https://mailarchive.ietf.org/arch/msg/ntp/RBJUgaEJsrzjlGCVjEk5C0dS6IQ>
Subject: Re: [Ntp] Antw: [EXT] Re: New Version Notification for draft-gruessing-ntp-ntpv5-requirements-03.txt
X-BeenThere: ntp@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Network Time Protocol <ntp.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ntp>, <mailto:ntp-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ntp/>
List-Post: <mailto:ntp@ietf.org>
List-Help: <mailto:ntp-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ntp>, <mailto:ntp-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 18 Oct 2021 21:13:09 -0000

mayer@pdmconsulting.net said:
> There's nothing secret about a timestamp.

Agreded.

But the rest of the packet could provide tracking information unless everybody 
uses data minimization.

We could change the format of the request so that there is nothing to 
minimize.  (That would need padding so the length matches the response so NTP 
can't be used for amplification.)

If we are using something like data minimization because the request and 
response packet formats are similar, then we all have to use the same data 
minimization rather than have each client implementation invent their own set 
of constants.

-- 
These are my opinions.  I hate spam.

v2.23.0 | Report a Bug | By Email