Windows AD and ntpd sync problem

David Rawling djr at
Fri Sep 17 12:47:45 UTC 2010

  On 13/09/2010 4:45 PM, Omer Faruk SEN wrote:
> Hi,
> I am trying to sync my time against a ntp server on Active Directory
> but no matter what i do ntpd did not sync against AD's NTP server.
> ntpdate works perfectly against AD but not ntpd.
I think you will have trouble doing this. AD's time service is not a true NTP 
service - it's SNTP with a dash of smarts around increasing frequency and 
backing off, plus automatic selection of masters / distribution hierarchy.

I'd suggest setting up the NTP server to use the NTP Pool project 
(, or the appropriate country subdomain) and configuring AD to 
synchronise to the NTP server (that should work fine).


David Rawling
PD Consulting And Security
Mob: +61 412 135 513
Email: djr at

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