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[Ntp] Re: NTPv4 client behavior to ntpv3 reply

Martin Burnicki <martin.burnicki@meinberg.de> Tue, 30 July 2024 09:38 UTC

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Date: Tue, 30 Jul 2024 11:38:26 +0200
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To: rémy decrock <rmdck@rmdck.fr>
References: <499016286.658450.1722265918944@ichabod.co-bxl> <89926b1b-e909-4f4d-8d13-ecf43d6ddd59@ntp.org> <633834849.717533.1722326425298@ichabod.co-bxl>
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From: Martin Burnicki <martin.burnicki@meinberg.de>
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CC: Harlan Stenn <stenn=40ntp.org@dmarc.ietf.org>, ntp@ietf.org
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Subject: [Ntp] Re: NTPv4 client behavior to ntpv3 reply
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rémy decrock wrote:
> Thank you Harlan for the answer.
> 
> The issue behind my question is that I have an equipment that uses a 
> NTPv4 client and so perform ntpv4 requests to a server that only support 
> NTPv3 "Windows..."
> The server replies to my equipment but  with a NTPv3 answer and seems to 
> be ignored.
> Before creating a bug request to the vendor, I want to be sure that this 
> behavior is illegitimate or not.

I would check which software runs on the server. If it's the "Windows 
Time" service (w32time.exe), its behavior depends strongly on the 
Windows version. There have been quite a number of quirks over the years.

Unless the server is a domain controller, you could think about 
replacing the NTP software at the server side by ntpd, e.g from
https://www.meinbergglobal.com/english/sw/ntp.htm#ntp_stable

Whether it makes sense to replace the server software depends on some 
details of the installation that I don't know.


Martin
-- 
Martin Burnicki

Senior Software Engineer

MEINBERG Funkuhren GmbH & Co. KG
Email: martin.burnicki@meinberg.de
Phone: +49 5281 9309-414
Linkedin: https://www.linkedin.com/in/martinburnicki/

Lange Wand 9, 31812 Bad Pyrmont, Germany
Amtsgericht Hannover 17HRA 100322
Geschäftsführer/Managing Directors: Natalie Meinberg, Werner Meinberg, 
Andre Hartmann, Heiko Gerstung
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