Synchronization of computer is very important in modern computer networks, precision and timing is crucial in many applications, particularly time sensitive operations. Imagine buying an airline seat only to hear at the airport that the ticket was sold twice because it was then purchased a computer that had a slower clock!
modern computers have internal clocks called Real Time Clock chips (RTC), the date and information. Thischips supported the battery so that even during power outages, may time but personal computers are not designed to be perfect to keep the clocks. Their design has been optimized for mass production and low cost rather than maintaining accurate time.
For many applications this can be quite adequate, but often need time machines to be synchronized with other PCs on a network and when computers are not synchronized with every other problem may arise, Such as file-sharing networksor, in some environments even fraud!
Microsoft Windows 2000, a time synchronization tool built into the operating system called Windows Time (W32Time.exe) that can be configured to operate as a network server. Strongly Microsoft and others recommend a server when configured with a hardware source instead Internet, where there is no authentication.
If you configure the Windows Time service to the internal hardware clock, usefirst make sure W32Time is the list of system services in the registry to verify:
Click Start, Run and type regedit and click OK.
Locate and click the following registry entry:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32Time
It is strongly recommended that you back up the registry as serious problems can occur if you modify the registry incorrectly, modifications to the registry at your own risk.
To begin configuring ainternal clock, click the following subkey:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeParameters
In the right pane, click ReliableTimeSource, click Change.
In the Edit DWORD Value, type 1 in the Value data box, click OK
Close the Registry Editor
To start the Windows Time Service click Start, Run (or alternatively use the operations command prompt).
Type net stop w32time & & net start W32Time
Then press Enter.
Alocal reset 'time on the computer, type the following on all computers except the time server which must not be synchronized with itself:
w32tm-s
To configure the Windows Time service to an external source, click Start, Run, type regedit and then click OK.
Locate the following subkey:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeParameters
In the right pane, click Type then click Modify, in edit Value type NTP in the Value dataand click OK.
Now, in the right pane, right-click ReliableTimeSource, click Change.
In the Edit DWORD Value window, under Value data, type 0, click OK.
NtpServer right mouse button in the right pane, click Edit.
In the Edit DWORD Value, type the Domain Name System (DNS), DNS, each unique.
Click OK.
For Windows 2000 Service Pack 4, set the settings to make this correctionfound:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeParameters
In the right pane, click MaxAllowedClockErrInSecs right, then change the Edit DWORD Value box, type a time when the second maximum number of seconds difference between the local clock and the received time from the NTP server to be considered a valid new time.
Click OK.
To find the polling interval:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeParameters
Inright pane, click Period, then click Edit.
In the Edit DWORD Value window, under Value data, type 24 then click OK
Close the Registry Editor
Click Start, then Run and type the following and press Enter:
Net stop w32time & & net start W32Time
To reset the local 'time of the computer, type the following on all computers except the time server which must not be synchronized with itself:
Network Time Protocol (NTP) is an Internet protocol used toaccurate transfer of time, time that the information together, so an exact time can be obtained
For the Network Time Protocol, NTPServer, locate and click:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeTimeProvidersNtpServer
In the right pane, click Enabled, then click Edit.
In the Edit DWORD Value, type 1 under Value data, click OK.
Now go back and clickon
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeParametersNtpServer
In the right pane, click NtpServer, then change the Edit DWORD Value data, type in the right pane, click NtpServer, then change the Edit DWORD Value data, type the Domain Name System (DNS), each DNS must be unique and need 0x1 to the end of each DNS name otherwise changes will not take effect.
Click OK.
Research andClick on the following
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32TimeTimeProvidersNtpClientSpecialPollInterval
In the right pane, click Special Poll Interval, click Edit.
In the Edit DWORD Value window, under Value data, type the number of seconds you want for each poll, ie 900 will poll every 15 minutes, and then click OK.
To configure correction, found:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32Timeconfig
LawMaxPosPhaseCorrection right mouse button, then change the Edit DWORD Value box, under Base, click Decimal, under Value data, type a time in seconds such as 3600 (one hour) then click OK.
Now go back and click:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesW32Timeconfig
In the right pane, click MaxNegPhaseCorrection, then change.
In the Edit DWORD Value window below, click Decimal in the Value data type the time in seconds that you want to poll such as 3600 (in pollshour)
Close the Registry Editor
Now it is time to restart Windows, click Start, Run (or alternatively use the command prompt facility) and type:
net stop w32time & & net start W32Time
And on each computer, other than the time server, type:
W32tm / s
And this is the time server should be up and running now.
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