Hi,
the Windows Time service includes both an NTP Client and an NTP Server. The NTP Server is disabled by default.
If your Windows Box should act as NTP Server config a valid time source first. Either a DCF77 (Germany) Receiver or an couple of NTP Servers which you trust.
For Germany I recommend to use the NTP Server from the “physikalisch-technische bundesanstalt”.
Lets start. Configure the Windows Time Service as NTP Client.
D:\> w32tm /config /syncfromflags:manual /update /manualpeerlist:ptbtime1.ptb.de,ptbtime2.ptb.de
Configure w32time Service to start automatically
D:\> sc config w32time start= auto D:\> net start w32time
Configure w32time as Server
D:\> w32tm /config /reliable:yes D:\> w32tm /config /update D:\> reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer /v Enabled /t REG_DWORD /d 1 /f D:\> net stop wuauserv D:\> net start wuauserv
Open Firewall
D:\> netsh advfirewall firewall add rule name="NTP Server" dir=out protocol=udp localport=123 profile=any enable=yes action=allow D:\> netsh advfirewall firewall add rule name="NTP Server" dir=in protocol=udp localport=123 profile=any enable=yes action=allow
Check configuration, a section NtpServer should appear
D:\> w32tm /query /configuration ... NtpServer (Local) DllName: C:\Windows\system32\w32time.dll (Local) Enabled: 1 (Local) InputProvider: 0 (Local) AllowNonstandardModeCombinations: 1 (Local) ...
Test it from another computer
C:\> w32tm /stripchart /computer:youtNTPServer /samples:4 /dataonly Tracking youtNTPServer[192.168.254.1:123]. Collecting 4 samples. The current time is 22.05.2018 22:53:55. 22:53:55 -00.0636377s 22:53:56 -00.0662772s 22:53:57 -00.0583119s 22:53:58 -00.0671685s
Michael
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The syntax in: Lets start. Configure the Windows Time Service as NTP Client does not work in Windows Server 2019. Should be in quotes and a space between peers.
Also a hex value set to control peer type:
1. D:\> w32tm /config /syncfromflags:manual /update /manualpeerlist:”ptbtime1.ptb.de,0x9 ptbtime2.ptb.de,0x9″
The hex value could be desired to be something else, such as 0x2 for a fail back only option, but this is a good setting for stand alone time servers.
I don’t think you meant to restart Windows update in Configure w32time as Server steps 4 and 5. SHouldn’t that be:
4. D:\> net stop w32time
5. D:\> net start w32time