IETF Logo Mail Archive

Re: [Ntp] Antw: Follow-up to yesterday's mic comment about PTP security

Hal Murray <hmurray@megapathdsl.net> Wed, 24 July 2019 06:31 UTC

Return-Path: <hmurray@megapathdsl.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 A9A0912011D for <ntp@ietfa.amsl.com>; Tue, 23 Jul 2019 23:31:03 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 1.035
X-Spam-Level: *
X-Spam-Status: No, score=1.035 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HELO_DYNAMIC_IPADDR=1.951, RDNS_DYNAMIC=0.982, SPF_HELO_NONE=0.001, SPF_NONE=0.001] autolearn=no 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 uzwnBZUHOe9a for <ntp@ietfa.amsl.com>; Tue, 23 Jul 2019 23:31:01 -0700 (PDT)
Received: from ip-64-139-1-69.sjc.megapath.net (ip-64-139-1-69.sjc.megapath.net [64.139.1.69]) by ietfa.amsl.com (Postfix) with ESMTP id 7EC4412007C for <ntp@ietf.org>; Tue, 23 Jul 2019 23:31:00 -0700 (PDT)
Received: from shuksan (localhost [127.0.0.1]) by ip-64-139-1-69.sjc.megapath.net (Postfix) with ESMTP id 7B63040605C; Tue, 23 Jul 2019 23:30:59 -0700 (PDT)
X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.3
To: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>
cc: Daniel Franke <dfoxfranke@gmail.com>, "ntp@ietf.org" <ntp@ietf.org>, hmurray@megapathdsl.net
From: Hal Murray <hmurray@megapathdsl.net>
In-Reply-To: Message from "Ulrich Windl" <Ulrich.Windl@rz.uni-regensburg.de> of "Wed, 24 Jul 2019 08:04:44 +0200." <5D37F4FC020000A1000325EE@gwsmtp.uni-regensburg.de>
Mime-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Date: Tue, 23 Jul 2019 23:30:59 -0700
Message-Id: <20190724063059.7B63040605C@ip-64-139-1-69.sjc.megapath.net>
Archived-At: <https://mailarchive.ietf.org/arch/msg/ntp/V10Pm6efN_0xKvTCQFwuU-cr9rM>
Subject: Re: [Ntp] Antw: Follow-up to yesterday's mic comment about PTP security
X-BeenThere: ntp@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: <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: Wed, 24 Jul 2019 06:31:04 -0000

Ulrich.Windl@rz.uni-regensburg.de said:
> Interestingly I think most data centers would like to have 1a: 100µs to 5ms.
> Are you saying NTS can't do better than a few ms? 

It depends on your network connection and the availability of nearby good 
servers.  It's easy to do worse than 5ms.  It's hard to do 100 us over the big 
bad internet.


-- 
These are my opinions.  I hate spam.

v2.23.0 | Report a Bug | By Email