Posted on 2004-10-26
Last Modified: 2010-04-10

I need to synchronise several servers that control, our 'time and attendance' clocking-in machines.

I beleive that NTP is the soultion - unless you chaps know any better.

Basically what do I need to do to set it up and get it going?

I know nothing about NTP at present.

I have been using a little app that connects to the atomic clock, and then uses a scheduled 'net time' command to sync the servers concerned. This is a little flakey and I'd like to come up with a better solution.

Over to you chaps,

Question by:yvsupport
    LVL 1

    Expert Comment

    The best way to do this ( apparently ) and assuming that you have 2000/2003 domain server is to just set the server to pick up from the atomic clock using your program

    then in a startup script, put the following

    net time /domain:domainname /set /y
    this should sort you out

    hope it helps
    LVL 5

    Expert Comment

    LVL 10

    Accepted Solution

    Hi yvsupport,
    What OS are we talking about? W2K supports SNTP natively, W2K3 supports NTP. WNT supports SNTP through the resource kit. Before upgrading our domain to W2k3, I used a (free) utility called net time available from Sourceforge (
    NTP protocol in all it's glory is explained here:

    Regards .. Alan

    Author Comment

    Sorry forgot to mention.

    I have Win2k3 apps servers (the ones that need sync-ing), but we haven't made the jump to AD yet, so we are still running NT as our DC's.

    LVL 10

    Expert Comment

    Then run something like NetTime on your NT server(s) and tell your Y2K3 servers to sync with them (that) either by running NetTime in client mode (it's both client and server), or by telling W32TM (the W2K3 native server/client) to sync with one of the NT time servers. Don't forget, if you're syncing W3k3 using a third party client like NetTime, to disable the native Windows Time service. We had a problem when we upgraded where the time was backwards and forwards due to clients syncing with the domain contoller (native W2k3 operation) where the DC was syncing with nothing, and also syncng with a NetTime server!
    .. Alan

    Author Comment


    How do I tell the 2k3 boxes to sync with the NT PDC?
    LVL 10

    Expert Comment

    or more probably;en-us;816042
    The authoritative resource:

    Basically you tell w32tm to synchronise with an external source. or stop and disable the windows time service, and use an NTP client.

    I think the actual command line is:
    w32tm /config /syncfromflags:manual /manualpeerlist:peerlist
    followed by:
    w32tm /config /update


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