[Samba] time sync for windows workstations

L.P.H. van Belle belle at bazuin.nl
Wed Sep 3 05:37:51 MDT 2014

you time is allowed to have a small difference. ( max 5 min in windows server default ) 
see :  http://technet.microsoft.com/en-us/library/jj852172(v=ws.10).aspx 

in time this should be automaticly adjust to the correct time. 




>-----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 13:32
>Aan: samba at lists.samba.org
>Onderwerp: Re: [Samba] time sync for windows workstations
>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 
>>> 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 
>>>>> 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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