[Samba] time sync for windows workstations

mourik jan heupink - merit heupink at merit.unu.edu
Wed Sep 3 05:31:58 MDT 2014

Hi Louis,

Yep, time difference is only one minute, so it should adjust 
automatically. I was using the pool, but I'll try your suggestion to use 
for example ntp1.nl.net.

DC's are virtualised yes, so that is also something to keep in mind, 
thank you.

So... it seems that we are alone with the time discrepancy between DC's 
and workstations... Something to investigate deeper...

Thanks for your feedback.


On 9/3/2014 13:21, L.P.H. van Belle wrote:
> Hai Mourik jan.
> I havent seen that in my my network time is in sync on all servers and pc's.
> If a pc starts with a time difference more then 5 min, than you must manualy set time correct
> how it did setup.
> all DC's  point to the same external time server.
> DONT use ntp.pool.org or other pools on you dc's.
> configure 1 good time server ( stratum 1 server ) in your country.
> im using ntp1.nl.net
> if you DC virtualized, then you must configure the timeserver to not obey the time of the host.
> so ntp used always the ntp server online ..
> best regards,
> Louis
>> -----Oorspronkelijk bericht-----
>> Van: heupink at merit.unu.edu
>> [mailto:samba-bounces at lists.samba.org] Namens mourik jan
>> heupink - merit
>> Verzonden: woensdag 3 september 2014 13:14
>> Aan: samba at lists.samba.org
>> Onderwerp: Re: [Samba] time sync for windows workstations
>> Hi Stefan,
>> Thanks, I had not yet read that, but it tells me the same that
>> I read on
>> different places:
>> "Per default, Windows clients in an Active Directory, automatically
>> synchronize their time with the DC, owning the ?PDC? role. If
>> you don't
>> want to use a different source, configure fallback time
>> server, etc. you
>> don't have to take action."
>> I have three DC's, all synced to NTP (and they all display the same
>> result for "date"), pdc role is owned by DC2.
>> However... the time on the workstations is a minute off. So,
>> even though
>> they are supposed to sync automatically, we don't see it happening...
>> Are we alone with this, does it work in your networks..? (because then
>> specifically we seem to have a problem)
>> MJ
>> On 9/3/2014 13:04, Stefan Schäfer wrote:
>>> Am 03.09.2014 12:51, schrieb mourik jan heupink - merit:
>>>> Hi all,
>>>> On our DC's we use ntp to keep time synced. I've googled a bit on AD
>>>> and time sync on workstations, and it seems they are
>> supposed to sync
>>>> their time with the time on the DC.
>>>> I see however that in our network, this is not occuring: there is a
>>>> minute time difference between the dc's and my workstation.
>>>> Is this something that samba has not yet implemented, or is there
>>>> something else wrong here? What are you observing in your networks?
>>>> Regards,
>>>> MJ
>>> Have a look at the samba wiki:
>>> http://wiki.samba.org/index.php/Samba_AD_DC_HOWTO#Configure_NTP
>>> Regards
>>> Stefan
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