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NTP-Server am Windows (Server) eintragen

Damit ein Windows (Server) außerhalb einer Domäne seine Zeit von einem spezifischen NTP-Server erhält, sind einige Schritte in der Windows regedit.exe notwendig.

Konfiguration – Client

Wird ein Client Betriebssystem außerhalb der Domäne verwendet, muss nur der folgende Befehl in CMD (Admin Rechte) ausgeführt werden:

Net time \\<ntpserver> /set /yes

<ntpserver> ist die IP-Adresse oder der FQDN des NTP-Servers. Die Änderung ist auch über das GUI Menü (Rechtsklick auf Datum / Zeit inder Tastkleiste) möglich.

Konfiguration – Windows Server

1. Change the server type to NTP.
Registry Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\Type
Change value data to: NTP

2. Set announce flags.
Registry Key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\AnnounceFlags
Change value data to: 5

3. Enable NTP server
Registry Key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer
Change value data to: 1.

4. Specify the time sources.
Registry Key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters
Change value data to: <peerlist>
<peerlist> is a list of space-delimited NTP peers from which time can be received. If DNS names are used, you must append ‘,0x1’ to each DNS name. Alternatively, a list of IP addresses can be specified.

5. Select poll interval.
Registry Key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient\SpecialPollInterval
Change value data to: <period>
<period> is the time in seconds between each poll. Microsoft recommends a value of 900, which equates to a polling frequency of once every 15 minutes.

6. Set the time correction settings.
These settings specify a time frame to validate time stamps received from an external reference. Only if the received timestamp falls between these registry settings will they be accepted. It provides a facility to reject timestamps that are too far away from the hosts system time. Microsoft recommends a setting of 1 hour (3600) or 30 minutes (1800).
Registry Key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\MaxPosPhaseCorrection
Change value data to: <seconds>
Where <seconds> is the maximum positive offset of the received time stamp from the system time.

Registry Key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\MaxNegPhaseCorrection
Change value data to: <seconds>
Where <seconds> is the maximum negative offset of the received time stamp from the system time.

7. Restart the windows time service.
Stop and restart the Windows Time Service using the ‘net stop’ and ‘net start’ commands:
net stop w32time && net start w32time