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Windows Server 2008 R2 Thread, Resetting Clocks in Technical; The system clocks on our server and PCs are wrong (a few minutes fast) - is there anything I need ...
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    enjay's Avatar
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    Resetting Clocks

    The system clocks on our server and PCs are wrong (a few minutes fast) - is there anything I need to be aware of/cautious about before I go changing these?

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    SYNACK's Avatar
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    Not more than five min change at one time if you still have some XP clients. Vista and 7 do their changes more smoothly.

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    as long as you arnt changing them by massive ammounts and any domain you have trusts to has its clocks at a close enough time shouldnt be an issue

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    Iain's Avatar
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    Just be aware that Kerberos authentication / services will fail if the time difference between the server and the PCs is greater than a defined tolerance (default 5 minutes). Once all the clocks have been synced, then it should all work again.

    Iain.

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    Hi

    Time sync your pcs with the server and then move the time on the server by less than 5 mins every couple of days till you get the time correct.

    It took me 2 months to get the time right here,

    Richard

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    Well use this script on your dcs:

    net stop w32time
    w32tm /config /manualpeerlist:"0.uk.pool.ntp.org 1.uk.pool.ntp.org 2.uk.pool.ntp.org 3.uk.pool.ntp.org" /syncfromflags:manual /reliable:yes /update
    w32tm /config /reliable:yes
    net start w32time

    Also in dc group policy set servers to ntp

    in other pc/ servers group policy put ntsds

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    Quote Originally Posted by irsprint84 View Post
    Well use this script on your dcs:

    net stop w32time
    w32tm /config /manualpeerlist:"0.uk.pool.ntp.org 1.uk.pool.ntp.org 2.uk.pool.ntp.org 3.uk.pool.ntp.org" /syncfromflags:manual /reliable:yes /update
    w32tm /config /reliable:yes
    net start w32time

    Also in dc group policy set servers to ntp

    in other pc/ servers group policy put ntsds
    you may find the lea has a time server and access to others is blocked

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    ah the joys of LEA

    just change o.uk.pool.ntp.org to whatever the LEA IP is

    Ian

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    ricki's Avatar
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    Hi

    A lot of the time you can only use the lea time server as they stop you accessing the web ones.

    As far as I remember you can set the ntp setting in gpo and you can set a ntp server in dhcp. I have had a problems setting a time server in gpo for xp and had to put
    NET TIME \\timeserver /SET /YES
    in a startup script.

    Richard

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    microsoft now tells people to avoid ntp time in dhcp and I would advise against doing in script, best to do all with GPO

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    enjay's Avatar
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    They are only a few minutes out just now, so it sounds like I'll be okay...

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    I would just fix it, I made that mistake and cost me dear!

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    With Windows Server 2008 R2, when promoted to a domain controller, this becomes your domain's own time server. There's a good discussion about it here

    I then run the following code once:

    Code:
    @echo off
    
    net stop w32time
    
    w32tm /config /syncfromflags:manual /manualpeerlist:ntp.bgfl.org
    
    w32tm /config /reliable:yes
    
    net start w32time
    
    w32tm /query /peers
    
    PAUSE
    When you join Windows 7 clients to a 2008 R2 domain, they'll automatically 'check in' to your 2008 R2 DC. You can verify this by running:

    Code:
    w32tm /query /peers
    from a command prompt on a Windows 7 client. It should report back something like:

    Peer: SERVERNAME.domain.domain
    State: Active
    Time Remaining: 860.6081351s
    Mode: 3 (Client)
    Stratum: 4 (secondary reference - syncd by (S)NTP)
    PeerPoll Interval: 12 (4096s)
    HostPoll Interval: 12 (4096s)
    You don't need to run any scripts or set any GPOs for the clients. It just works automatically.

  14. #14

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    with GPO mine check in automatically every minute or as you can set in gpo

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    Every minute? What's the point setting it so frequently? Once every few days would easily be enough.

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