ntpd strange problem

[Peter Jeremy]

On 2018-Oct-08 13:19:18 +0200, Wojciech Puchar <wojtek at puchar.net> wrote:
>After week or so it got out of sync in spite of ntpd still running.
>
>Strange but today (4 days after i restarted ntpd) it seems to be in sync

A couple of suggestions:
* (especially if you have an ADSL link): The NTP protocol assumes that
the path between the client and server are have symmetric timing.  In
my experience, bulk uploads or downloads can cause significant path
delay asymmetries, which can confuse ntpd.
* You only have a single server and are therefore dependent on the
trustworthiness of that server.  A few more servers could be useful.

You could try adding enabling some monitoring (eg loopstats and
peerstats) and see what is happening leading up to ntpd losing sync.

-- 
Peter Jeremy
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