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How to add an adition NTP server to Windows 10, open COMMAND:

reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters” /v NtpServer /t REG_SZ /d “pool.ntp.org,0x1 time1.google.com,0x1 time.windows.com,0x9” /f

Restart the service:

sc config W32Time start=auto

Verify the configuration:

w32tm /query /configuration

Thanks to: techexpert.tips


Use Windows 10 as NTP Server.

Open the command prompt (cmd) as administrator and fire the following commands:

  1. Enable the NTP server service

net stop W32Time
reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\Config” /v LocalClockDispersion /t REG_DWORD /d 0 /f
reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters” /v LocalNTP /t REG_DWORD /d 1 /f
reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\TimeProviders\NtpServer” /v Enabled /t REG_DWORD /d 1 /f
reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\Config” /v AnnounceFlags /t REG_DWORD /d 5 /f
sc config W32Time start=auto
net start W32Time

2. Check if the NTP server is enabled

w32tm /query /configuration

See in the output the 2nd last line, Enabled: 1 (local) is correct.

NtpServer (Local)
DllName: C:\Windows\system32\w32time.dll (Local)
Enabled: 1 (Local)
InputProvider: 1 (Local)

3. Allow rule in the firewall

netsh advfirewall firewall add rule name=”NTP Server” dir=in protocol=udp localport=123 profile=any enable=yes action=allow

4. Test the service from external system

w32tm /stripchart /computer: /samples:4 /dataonly


To enable PING reply in Windows 10 the firewall needs to allow the ping request.

Open the command prompt (cmd) with administrator rights and fire the following command.

netsh advFirewall Firewall add rule name=”PING IPv4 allow” protocol=icmpv4:8,any dir=in action=allow