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Almost all computers in an activity requires registration time if a timestamp when a network has agreed to send an email, knowing the time is crucial for computer applications.
All computers have on-board clock provides the time and date information. These real-time clock (RTC) chips are battery backed so that even when turned off can be maintained over time, however, these RTC chips are mass produced and can not keep time accurate and tend to drift.
For many applications this can be quite adequate, however, if a computer on a network and need to talk to other machines, not synchonised are at the right time can mean many time sensitive transactions can not be completed and may even leave the network open to security threats.
All versions of Windows Server since 2000 have included a time synchronization service called Windows Time Service (W32Time.exe), integrated into the operating system. This can be configured to operate as a time synchronization server on the network all the machines at a specific time source.
Windows Time Service uses a version of NTP (Network Time Protocol), usually a simplified version of Internet protocol that is designed to synchronize the machines in a network, NTP is also the type for which most computer networks across the world use to synchronize with.
Select the time source correct is vital. Most networks are synchronized to UTC (Coordinated Universal Time) source. UTC is a global standard time based on atomic clocks which are the resources of accurate time.
UTC can be obtained via the Internet from places like time.nist.gov (Us Naval Observatory) or time.windows.com (Microsoft), but it should be noted that Internet time sources can not be authenticated which can leave a system open to abuse and Microsoft and others advise to use a font external hardware as a reference clock, as a specialized agency of NTP server.
NTP servers receive their time source from either a transmission specialist radio national physics laboratories emitting UTC time taken from an atomic clock source or by the GPS network which also relays UTC because of that need to determine locations of points.
NTP can maintain time over the public Internet within 1/100th of a second (10 milliseconds) and may be even more effective local area networks.
To configure Windows Time service to use an external source, simply follow these instructions.
Locate the registry subkey.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeParameters
Click then enter to change the value by inserting the PNT Value data box.
Click ReliableTimeSource then Modify the Edit DWORD Value box, by inserting 0 (zero).
NtpServer then click Edit Change value by typing the Domain Name System (DNS), (note each DNS must be unique).
Now locate the original subkey and click Modify the drafting period DWORD Value box with the polling interval (how often an NTP server polls the time), under Value Data (recommended 24)
Run the following command line, net stop w32time & & net start w32time.
Now enable NTP by locating of the subkey, HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeTimeProvidersNtpServer
Right click Enabled and modify the Value data box, type 1.
Click SpecialPollInterval pain in the right HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeTimeProvidersNtpClientSpecialPollInterval subkey. Edit Value DWORD box when you want for each survey (900 surveys will be every 15 minutes)
Locate HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32Timeconfig
To configure the time correction MaxPosPhaseCorrection right click, then edit the DWORD value box the time in seconds such (decimal select the first base, 3600 = one hour)
Now do the same for MaxNegPhaseCorrection restart Windows by running time service (or, alternatively, installation use the command prompt) net stop w32time & & net start w32time.
To synchronize each machine simply type w32tm /-s in the prompt, and the time server should now work correctly (note it may take several polls before the correct time shown).
About the Author:
Richard N Williams is a technical author and a specialist in the telecommunications and network time synchronisation industry helping to develop dedicated NTP clocks. Please visit us for more information about NTP or other network time server solutions.
Article Source: ArticlesBase.com – Windows Time Server: Synchronising Your Network With Ntp
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