[Ntp] Antw: [EXT] Re: NTS4UPTP draft
Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de> Mon, 07 June 2021 07:22 UTC
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Date: Mon, 07 Jun 2021 09:22:06 +0200
From: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>
To: doug.arnold=40meinberg-usa.com@dmarc.ietf.org, Dieter Sibold <dsibold.ietf@gmail.com>, mlichvar@redhat.com
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Subject: [Ntp] Antw: [EXT] Re: NTS4UPTP draft
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>>> Doug Arnold <doug.arnold=40meinberg-usa.com@dmarc.ietf.org> schrieb am 04.06.2021 um 18:45 in Nachricht <AM7PR02MB5765DAE47BF68F331CBE7BE8CF3B9@AM7PR02MB5765.eurprd02.prod.outlook.com> > 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. Hi! Another question is: if PTP is used mostly for corporate "private" networks, wouldn't "PTP over VPN" do? If companies have a "private (more or less) fiber", isn't that "security enough"? I mean NTP being a "public" protocol, the "NTP over VPN" wouldn't work. (Timing-issues left aside) Regards, Ulrich > > Doug > > From: ntp <ntp‑bounces@ietf.org> on behalf of Miroslav Lichvar > <mlichvar@redhat.com> > Date: Thursday, June 3, 2021 at 4:03 AM > To: Dieter Sibold <dsibold.ietf@gmail.com> > Cc: Heiko Gerstung <heiko.gerstung=40meinberg.de@dmarc.ietf.org>, NTP WG > <ntp@ietf.org> > 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 > > _______________________________________________ > ntp mailing list > ntp@ietf.org > https://www.ietf.org/mailman/listinfo/ntp
- [Ntp] NTS4UPTP draft Heiko Gerstung
- Re: [Ntp] NTS4UPTP draft Dieter Sibold
- Re: [Ntp] NTS4UPTP draft Miroslav Lichvar
- Re: [Ntp] NTS4UPTP draft Doug Arnold
- [Ntp] Antw: [EXT] Re: NTS4UPTP draft Ulrich Windl
- Re: [Ntp] Antw: [EXT] Re: NTS4UPTP draft Heiko Gerstung
- Re: [Ntp] Antw: [EXT] Re: NTS4UPTP draft Doug Arnold