Win 32 Time

Posted on 2005-04-27
Last Modified: 2008-03-06
I have configured the XP PC to synchronize every 30 minutes. But I have a problem with w32time instead of sychronizing every 30mins it now synchronizes every 17mins.

Below is the configuration I have done:

a) Configure NTP Server Reference Source
•      HKEY_LOCAL_MACHINE – SOFTWARE – Microsoft – Windows – CurrentVersion – DateTime – Servers
•      Name =1,
•      Type=REG_SZ, Data = IP for ntpserver_source1, , IP for ntpserver_source2, IP for ntpserver_source3

b) Configure w32time to synch every 30 minutes
•      HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\W32Time\TimeProviders\NTPClient
•      Locate SpecialPollInterval DWORD value
•      Select Decimal as the base and change the value data to 1800 (30 min x 60 sec = 1800)

Any ideas? Thank You in advance.
Question by:ben1211
    LVL 6

    Expert Comment

    It is possible that if on a domain there is a group policy or local policy.
    It is also possible there is a scheduled task

    The below URL may also be useful.

    LVL 57

    Expert Comment

    by:Pete Long
    Setting Domain Time

    There a number of time service refinements in Server 2003 but the following will work on 2K as well. For continuity make the PDC Emulator the time server (in a 2003 domain it’s the time server by default)

    First arm yourself with the names of TWO external time servers see the lists below

    A List of the Simple Network Time Protocol Time Servers That Are Available on the Internet;EN-US;q262680
    Public NTP Primary (stratum 1) Time Servers

    Now you have two server names you need to find out two things

    Is the server up?
    What’s its IP address?

    I’m in the UK so I use and

    To answer the two questions above simply tracert to the server names (obviously you need DNS to be working first)

    For example

    Tracing route to []
    over a maximum of 30 hops:

      1    <1 ms    <1 ms    <1 ms

    <loads of hops deleted>

    29    24 ms    25 ms    22 ms []

    Trace complete.

    Using this method I now know the two IP addresses for those two time servers
    Are and

    You need to know that information to allow your “Time Server” out to those IP addresses on your firewall NOTE you need to allow UDP Port 123 to those IP addresses for SNTP to work.

    On the server issue the following command.

    net time /setsntp:""

    to ensure the command was successful issue the following

    net time /querysntp

    If you have a large complex network you can create local time servers in different locations (to cut down traffic etc) by editing the following registry key:
    In HKEY_LOCAL_MACHINE\ SYSTEM\CurrentControlSet\Services\W32 Time\Parameters, find the REG_DWORD subkey called LocalNTP. Change the subkey value from 0 to 1. After you restart Windows Time Service, your Win2K system will function as an SNTP server.


    Your clients in a 2K and XP environment should slowly start getting the correct time (if they struggle you can issue the following command on them)

    net time /setsntp:<IP address of your time server>

    ********If all that's too much Hassle*********

    Set your server to atomic time using third party software

    LVL 3

    Accepted Solution


    You can really tie yourself in knots with Win32time.  Try downloading this tardis2000:

    It's a great app and I use it to sync in excess of 300 machines on our office network.

    If you need to sync more than one machine - use tardis on the server and K9 on each client PC running as a service.

    Let me know how you get on.


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