Re: [Ntp] Robert Wilton's Discuss on draft-ietf-ntp-interleaved-modes-05: (with DISCUSS and COMMENT)

Hal Murray <halmurray+ietf@sonic.net> Tue, 20 July 2021 19:33 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 DDDF83A2F60 for <ntp@ietfa.amsl.com>; Tue, 20 Jul 2021 12:33:20 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.598
X-Spam-Level:
X-Spam-Status: No, score=-2.598 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_NONE=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 RIjDRF7uykGi for <ntp@ietfa.amsl.com>; Tue, 20 Jul 2021 12:33:19 -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 80EAC3A2F5F for <ntp@ietf.org>; Tue, 20 Jul 2021 12:33:19 -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 16KJXGQN024648 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Tue, 20 Jul 2021 12:33:17 -0700
Received: from hgm (localhost [IPv6:::1]) by 107-137-68-211.lightspeed.sntcca.sbcglobal.net (Postfix) with ESMTP id B7D6528C157; Tue, 20 Jul 2021 12:33:15 -0700 (PDT)
X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7.1
To: Miroslav Lichvar <mlichvar@redhat.com>
cc: ntp@ietf.org, Hal Murray <halmurray+ietf@sonic.net>
From: Hal Murray <halmurray+ietf@sonic.net>
In-Reply-To: Message from Miroslav Lichvar <mlichvar@redhat.com> of "Tue, 20 Jul 2021 13:08:14 +0200." <YPaunrczI/inrtMP@localhost>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Date: Tue, 20 Jul 2021 12:33:15 -0700
Message-Id: <20210720193315.B7D6528C157@107-137-68-211.lightspeed.sntcca.sbcglobal.net>
X-Sonic-CAuth: UmFuZG9tSVYa1G7hHSbo9VLVD4C42W2wzIaLUvToiRiJ7iQikGTmgiNH/8/JXrW4o0s4KmGMIws+15znSEufI0Upaotp0Zu9HyojDsBQnLk=
X-Sonic-ID: C;qKnhVJHp6xGncdvKcSgy2w== M;DEgWVZHp6xGncdvKcSgy2w==
X-Sonic-Spam-Details: -1.5/5.0 by cerberusd
Archived-At: <https://mailarchive.ietf.org/arch/msg/ntp/wrRZVgmCFpyAJtUm0-VNtkfMsR8>
Subject: Re: [Ntp] Robert Wilton's Discuss on draft-ietf-ntp-interleaved-modes-05: (with DISCUSS and COMMENT)
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: Tue, 20 Jul 2021 19:33:21 -0000

mlichvar@redhat.com said:
>> (2) Change the document status to Informational rather than Standards Track,
>> modifying the text to focus on documenting how some implementations work
>> rather than as an endorsement from IETF that this is the right way to modify
>> the NTP protocol.

> I'd prefer the second choice. Would anyone from the WG oppose that? 

I'd be happy with that.

-------

The draft should probably say something about NAT.  draft 06 says:

    The server MAY separate the timestamps by IP addresses, but it
  SHOULD NOT separate them by port numbers to support clients
  that change their port between requests, as recommended by
  [I-D.ietf-ntp-port-randomization].

If I understand things correctly, that will work if one and only one system is 
going through a NAT box and get complicated when a second system joins in.  
That might be an interesting test case.



-- 
These are my opinions.  I hate spam.