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 How to Configure Windows Server as a Ntp Server</h2>
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The Microsoft Windows operating systems from Windows 2000 onwards has a built-in time synchronization service – ‘Windows Time'. This article describes how to configure the Microsoft Windows 2003 and Windows 2000 time service as a NTP time server. It shows how to modify registry entries to configure the Microsoft Windows Time Service. The Windows Time service allows a Windows network to provide synchronisation of all machines within a domain. <br />Windows 2003 Server Configuration<br /><br />Windows 2003 has expanded on the original Windows 2000 time service by providing a true NTP implementation. The time service, installed by default, can synchronise to a NTP Server. Indeed, by manipulating registry settings for the service it can act as both an NTP server and client to synchronise other network clients in the domain.<br /><br />The 'Windows Time' service should be present in the systems service list. The application executable is 'w32time.exe'. The parameter list for w32time can be found in the registry at:<br /><br />HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time<br /><br />Before modifying registry entries it is good a dood idea to backup the registry settings. The registry can then be restored in the event of problems being encountered.<br />To configure a Windows 2003 machine to synchronise to an external NTP server, edit the following registry entries:<br /><br />HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\AnnounceFlags<br />Set the ‘Announce Flags' registry entry to 5, to indicate a reliable time source.<br /><br />HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NTPClient\SpecialPollInterval<br />The ‘Special Poll Interval' registry entry defines the period in seconds that the Windows 2003 machine should poll the NTP server. A recommended value is 900 seconds, which equates to every 15 minutes.<br /><br />HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\NtpServer<br />The ‘NTP Server' parameter is used to provide a list of IP addresses or DNS names, separated by a space, of NTP servers that the Windows 2003 machine can synchronise to.<br /><br />HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NTPServer\Enabled<br />Changing the ‘Enabled' flag to the value 1 enables the NTP Server.<br /><br />HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\Type<br />Change the server type to NTP by specifying ‘NTP' in the ‘Type' registry entry.<br /><br />Windows 2000 Time Service Configuration<br />AdChoices<br />Windows 2000 has an integrated time synchronisation service, installed by default, which can synchronise to a NTP Server. Indeed, by manipulating registry settings, the service can act as both an SNTP client and SNTP server to synchronise other network clients.<br /><br />Before modifying registry entries it is good a dood idea to backup the registry settings. The registry can then be restored in the event of problems being encountered.<br />The 'Windows Time' service should be present in the systems service list. The application executable is 'w32time.exe'. The parameter list for w32time can be found in the registry at:<br />HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters<br /><br />Windows 2000 can operate as an NTP client and synchronise to an NTP server by setting parameter 'NTP Server' to the IP address of a NTP Server.<br /><br />By default, the Microsoft Windows 2000 machine will synchronise to the specified NTP time server every 8 hours (or 3 times a day), which may not be enough to maintain accurate synchronisation. The period can be reduced by setting the 'Period' parameter to how many times a day synchronisation is required. Setting the period to 48 will activate synchronisation with the NTP server once every half hour.<br />Windows 2000 can also be configured to act as an NTP server by setting the 'Local NTP' parameter to '1'.<br /><br />After editing any of the registry entries for the windows time service, the service must be restarted for the settings to take effect. The services can be started or stopped from the service control applet in 'administrative tools'. Alternatively the service can be controlled via the DOS net command thus:<br /><br />net start w32time<br />net stop w32time<br /><br />NTP Troubleshooting<br /><br />A number of problems can be encountered when configuring the Windows Time Service. NTP operates using the UDP protocol over TCP/IP. Therefore the TCP/IP network infrastructure must be operational for NTP to be effective. Synchronisation issues may arise when NTP attempts to synchronise to an inaccurate time reference or if network delays are excessive.</div>
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							<u><strong>About the Author : </strong></u><strong><span itemscope="" itemtype="http://schema.org/Article">Dave Evans </span></strong></div>
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<strong><span itemscope="" itemtype="http://schema.org/Article">Dave Evans is 
involved in the development of NTP Server synchronisation solutions to 
ensure accurate time on PC’s and computer systems. Dave has developed 
dedicated NTP server systems, NTP synchronised digital clock systems and
 atomic clock time synchronisation products. Click here to find out more
 about <a href="http://www.timetools.co.uk/ntp-servers/ntp-server-s5000.htm" rel="nofollow">NTP Server</a> Systems.</span> </strong></div>
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How to Configure Windows Server as a Ntp Server

How to Configure Windows Server as a Ntp Server The Microsoft Windows operating systems from Windows 2000 onwards has a built-in time s...