Re: [Ntp] NTS4UPTP draft

[Doug Arnold <[e-mail]>]

I always recommend to network operators that  If you are transfer time across the Internet it should be NTP.  Nevertheless, Inevitably someone is going to run PTP this way.  However, I don’t know that it is something that we need to protect or encourage.

People do run PTP over large telecom networks.  Power grid operators sometime run PTP between substations on large telecom like networks to back up GNSS.  Financial data centers sometime like to get time over fiber from a remote national lab.  These applications will likely eventual want to improve the robustness by a having a secure version of PTP.

Doug

From: ntp <[e-mail]> on behalf of Miroslav Lichvar <[e-mail]>
Date: Thursday, June 3, 2021 at 4:03 AM
To: Dieter Sibold <[e-mail]>
Cc: Heiko Gerstung <heiko.gerstung=[e-mail]>, NTP WG <[e-mail]>
Subject: Re: [Ntp] NTS4UPTP draft
On Wed, Jun 02, 2021 at 11:40:49PM +0200, Dieter Sibold wrote:
> In the past PTP is applied mainly in local networks but today it is going to
> be applied across Internet connection also.

Just to clarify, do you mean that people are now using PTP to
synchronize clocks over Internet, or that the servers are
accessible from Internet and that's why they need to be secured?

The former wouldn't make sense to me as PTP relies on hardware support
in routers/switches, which is generally missing on Internet.

--
Miroslav Lichvar

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