Re: [chrony-users] NTP v4 header

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Am 2011-04-29 12:52, schrieb Miroslav Lichvar:
> On Thu, Apr 28, 2011 at 10:41:54PM +0200, Harald Krammer wrote:


>> Right now I am fighting again with some NTP implementations. These
>> returns with NTP v4 answers  instead of ntp v3 answers. Is there
>> something to consider when I enable ntp v4 answerers in chrony. Any
>> additional risks?
> chrony makes a client v3 request and the server replies with a v4
> packet? I'd say accepting the v4 reply should be safe and will work as
> expected, but I still haven't found time to study the new RFC 5905 to
> be sure.

Exactly and I came to the same opinion.
Simple ntp servers (also possible with v4) does not seem to work
together with chrony.  For that I am looking for a solution too.

>> BTW I merged my few patches to 1.25-pre2 and I did not see any side
>> effects. Let me know, if I should test something.
> Are the patches or your git repo publicly available? Maybe some of
> them should be included?

Sure, but before I will make my workarounds parameterizable via conf

> Thanks,


Harald Krammer

Mobil +43.(0) 664. 130 59 58
Mail: Harald.Krammer (at)

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