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KB-1662: How does adclient adjust system time (ntp/sntp)?

Centrify DirectAudit ,   Centrify DirectControl ,   Centrify Identity Service, Mac Edition ,  

12 April,16 at 11:12 AM

Applies to: All versions of Centrify DirectControl

Question:
How does adclient adjust the system time?

Answer:
Once the system is joined to a domain, adclient synchronizes system time against the Domain Controller time.

The capabilities are controlled by two values:

adclient.sntp.enabled: true
adclient.sntp.poll: 15

adclient.sntp.enabled parameter specifies whether to use the Windows Time Service to keep the local system clock in sync with the domain the computer has joined.

adclient.sntp.poll parameter specifies whether the interval between SNTP clock updates when using the Windows Time Service to keep the local system clock in sync with the domain the computer has joined. 

The above are controlled by Active Directory group policies:

Computer Configuration > Administrative Templates > System > Windows Time Service > Time Providers > Enable Windows NTP Client

Computer Configuration > Administrative Templates > System > Windows Time Service > SNTP Poll Interval


The poll time is actually the base 2 logarithm of the time in seconds. For example, a value of 6 gives 64 seconds (2**6), and a value of 15 gives 32768 seconds, or 9.1 hours. 

Note: This can be managed on a per-server basis too by editing /etc/centrifydc/centrifydc.conf and searching for the above parameters.

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