When you try to synchronize a Windows-based computer to a Network Time Protocol (NTP) server that isn't running Windows, the synchronization may not succeed. This article provides a resolution to this issue.
Applies to: Support versions of Windows Server Original KB number: 875424
Cause
This problem may occur when your computer sends synchronization requests by using symmetric active mode. By default, Windows Server 2003 domain controllers are configured as time servers and use symmetric active mode to send synchronization requests. Some NTP servers that don't run Windows respond only to requests that use client mode.
Resolution
To resolve this problem, configure Windows Time to use client mode when it synchronizes with the time server. Follow these steps:
The mode that Windows Time uses to send requests is set by the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer If the value of the Enabled entry in this subkey is 1, Windows Time uses symmetric active mode. Otherwise, Windows Time uses client mode.
The 0x8 setting that is referenced in the command in the "Resolution" section sets Windows Time to use client mode.
The valid settings for the mode used with the /manualpeerlist switch include:
Select Start, search for cmd, right-click Command Prompt, and then select Run as administrator.
In the Command Prompt window, run the following commands: Console Copy. w32tm /config /manualpeerlist:<NTP_server_IP_Address>,0x8 /syncfromflags:MANUAL net stop w32time net start w32time w32tm /resync.
Restart the Windows Time Service: Press the Windows key + R, type "services. msc" and press Enter. Find the "Windows Time" service, right-click it, and select "Restart". This should restart the time service and attempt to sync the date and time again.
Go to Start -> All Programs -> Accessories, and click Command Prompt.Type in w32tm /resync, and press ENTER (this will synchronize the time to your domain controller).
Navigate to Control Panel > Clock, Language and Region > Date and time > Set the time and date > Internet time > Change settings > check Synchronize with an Internet time server and click Update now. If issue still persists, check this video fix: Hope this helps!
The Windows Time service follows the Network Time Protocol (NTP) specification, which requires the use of UDP port 123 for all time synchronization. Whenever the computer synchronizes its clock or provides time to another computer, it happens over UDP port 123.
Firewall or antivirus settings can sometimes block the Windows Time service from connecting to its hosts, resulting in synchronization failure. Temporarily disabling your firewall and antivirus programs can resolve this issue. Run the Windows Network Connections tool to diagnose and repair network issues.
Open the Registry Editor (regedit) and navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters . Look for the "Type" DWORD and set its value to "NoSync" to prevent time synchronization.
Various methods have been devised to correct drift. The simplest and most reliable way is to implement Network Time Protocol (NTP) and receive accurate time signals from a server that is dedicated to that task and maintained to a very high standard of accuracy.
In the Clock and Region panel that opens, click Date and Time. Select the Internet Time tab at the top of the window that opens. Click the “Change Settings” button (administrator access is needed for this). Make sure “synchronize with internet time” is selected.
This problem occurs because the NTP client gets into SPIKE state every time the client polls the time sample to the NTP server. The Time service manages its internal status, and if the client gets into SPIKE state, the client does not sync its time.
Introduction: My name is Greg Kuvalis, I am a witty, spotless, beautiful, charming, delightful, thankful, beautiful person who loves writing and wants to share my knowledge and understanding with you.
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