[Samba] Samba4 Windows Client Time Sync Issue

Marco Shmerykowsky PE marco at sce-engineers.com
Tue Jun 27 18:25:08 UTC 2023

Interestingly, 'w32tm /monitor' return the same results and seem
to be connecting to the correct servers when working & non-working
clients are checked.

However checking the logon server (ie running 'set l') reveals
that the working clients are logging into the Primary DC and
the non-working clients apparently are loggin in to the backup DC.

I guess two questions:

1) Why isn't the logging into backup DC producing the sync'd time

2) How do the clients decide which machine to log in to?

On 6/27/2023 12:05 PM, Luis Peromarta via samba wrote:
> I had a similar issue some time ago. Some clients would sync with DCs some other didn’t.
> I recently had issues also with bookworm and NTP (bookwork installing ntpsec). I decided to move all DCs to chrony, worked perfectly, and all member servers to systemd-timesyncd with a minimal config from samba wiki that just *works*
> Re. Windows clients, I have not seen may Local CMOS clocks lately after these changes.
> This question may have been asked before, but how many DCs do you run, and do all have the same config for time (ntp, chrony) ?
> What’s the output of  w32tm /monitor in the clients ? What’s the output of w32tm /query /status ?
> On a good client (syncing with a DC) what is the logon server ? ( Run set l )
> On a bad client (not syncing with a DC) what is the logon server ? Is there a pattern ?
> Regards, LP
> On 26 Jun 2023 at 20:35 +0200, Marco Shmerykowsky PE <marco at sce-engineers.com>, wrote:
>> That's exactly what I thought I had done. The DC's point to
>> the netgate server. I was under the impression that the clients
>> would automatically time sync by logging into the domain.
>> Some PC's/Clients are syncing. Others are connecting to "Local
>> CMOS Clock".

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