How To Synchronize Microsoft Windows to a NTP Server | TimeTools

Most modern operating systems, including Windows, can synchronize their system time to a NTP waiter. Windows utilizes a time service called ‘ Windows Time ’, which is automatically installed in the service list. The course of study feasible is ‘ w32time.exe ’. The service is installed and enabled by default during installation .
Windows synchronizes time in different ways, depending on the network implementation utilized. When peer-to-peer network is employed, each person workstation synchronize to a fourth dimension reference independently .
however, when Windows Domain Networking is deployed, only the Primary Domain Controller ( PDC ) synchronizes with a prison term address. All other servers and workstations in the domain synchronize to the PDC using Windows proprietary protocol. The default initiation operation mechanically configures workstations and servers to sync to the controlling PDC. lone the PDC needs to be configured to synchronize to an external prison term address.
Configuring a Windows Server to Sync to an external time Reference .

Microsoft Windows Server 2008, Server 2003

To configure a Windows PDC to synchronize with an external NTP server requires register entry changes. When modifying register settings, it is constantly a good idea to backup the current settings ahead. Backup and change of the register is easily achieved using the ‘ regedit ’ utility, which can be run from the command note. You can revert back to former settings if any problems occur with register changes. Use the register editor ‘ regedit ’ to change the following entries :

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 :
Change value data to : 5
3. Enable NTP server
Registry Key :
Change respect data to : 1 .
4. Specify the time sources.
Registry Key :
Change value data to : 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 :
Change respect data to : 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 human body to validate time stamps received from an external reference. alone if the standard timestamp falls between these register settings will they be accepted. It provides a adeptness to reject timestamps that are excessively army for the liberation of rwanda away from the hosts arrangement time. Microsoft recommends a mise en scene of 1 hour ( 3600 ) or 30 minutes ( 1800 ).
Registry Key :
Change prize data to :
Where is the maximum positive offset of the received time stamp from the system time.

Registry Key :
Change value data to :
Where 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 ‘ final end ’ and ‘ net start ’ commands :
net check w32time & & internet begin w32time
Synchronizing a Windows Workgroup

Microsoft Windows XP, Vista, Windows 7

When Windows for Workgroups is deployed, you have to manually configure time synchronization settings. You need to specify the time server that the Windows Time Service is to use as a reference clock. This is a very aboveboard march ; plainly specify the time reference that the master of ceremonies is to synchronise with using the ‘ web time ’ command :

Net time \\ /set /yes

Where is the DNS name or IP address of the time reference.
alternatively, you can utilize the date and time properties applet from the control jury. Select the ‘ Internet Time ’ check from the applet, check ‘ Automatically Synchronize with an Internet Time Server ’ and enter the DNS name or IP address of the waiter. If you select ‘ Update immediately ’ the clock avail will attempt to contact and synchronize with the time reference immediately .
distinctive responses are :
‘ The time has been successfully synchronized with
This indicates that the time reference was contacted successfully and synchronization has been successful.

‘ An error occurred while Windows was synchronizing with
An attempt was made to contact the specified time reference, but no response was received.

‘ An error occurred while Windows was synchronizing with . The time sample was rejected because: The peer’s stratum is less than the host’s stratum.’
This indicates that contact was made with the specified time reference, but a problem was detected. Generally, it is because the time reference was in an unsynchronized state.

The applet will besides sporadically mechanically synchronize with the specified reference book. The next prison term synchronization is ascribable to begin is displayed at the bottom of the applet ’ south window .
About the Author.

Andy Shinton has spent his entire career within the IT industry, chiefly in the Time and Frequency sector. Since 2002, he has headed TimeTools Research and Development Division. Andy regularly writes white-papers and articles about NTP and Network Timing Solutions .

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Andrew Shinton About Andrew Shinton
Andrew Shinton is the joint founder and Managing Director of TimeTools Limited. He has a BSc (Hons) degree in Computer Science. Andrew has over 20 years experience of GPS systems and Network Time Protocol (NTP) in the Time and Frequency Industry.
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