How storage devices works


How to Configure Windows Server as a Ntp Server

The Microsoft Windows operating systems from
Windows 2000 onwards has a built-in timeWindows  2000  Time  Service  Configuration
synchronization service - 'Windows Time'.
This article describes how to configure theWindows 2000 has an integrated time
Microsoft Windows 2003 and Windows 2000 timesynchronisation service, installed by
service as a NTP time server. It shows how todefault, which can synchronise to a NTP
modify registry entries to configure theServer. Indeed, by manipulating registry
Microsoft Windows Time Service. The Windowssettings, the service can act as both an SNTP
Time service allows a Windows network toclient and SNTP server to synchronise other
provide synchronisation of all machinesnetwork  clients.
within  a  domain.
Before modifying registry entries it is good
Windows  2003  Server  Configurationa dood idea to backup the registry settings.
The registry can then be restored in the
Windows 2003 has expanded on the originalevent  of  problems  being  encountered.
Windows 2000 time service by providing a true
NTP implementation. The time service,The 'Windows Time' service should be present
installed by default, can synchronise to ain the systems service list. The application
NTP Server. Indeed, by manipulating registryexecutable is 'w32time.exe'. The parameter
settings for the service it can act as bothlist for w32time can be found in the registry
an NTP server and client to synchronise otherat:
network  clients  in  the  domain.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
The 'Windows Time' service should be presentervices\W32Time\Parameters
in the systems service list. The application
executable is 'w32time.exe'. The parameterWindows 2000 can operate as an NTP client and
list for w32time can be found in the registrysynchronise to an NTP server by setting
at:parameter 'NTP Server' to the IP address of a
NTP  Server.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
ervices\W32TimeBy default, the Microsoft Windows 2000
machine will synchronise to the specified NTP
Before modifying registry entries it is goodtime server every 8 hours (or 3 times a day),
a dood idea to backup the registry settings.which may not be enough to maintain accurate
The registry can then be restored in thesynchronisation. The period can be reduced by
event  of  problems  being  encountered.setting the 'Period' parameter to how many
times a day synchronisation is required.
To configure a Windows 2003 machine toSetting the period to 48 will activate
synchronise to an external NTP server, editsynchronisation with the NTP server once
the  following  registry  entries:every  half  hour.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Windows 2000 can also be configured to act as
ervices\W32Time\Config\AnnounceFlagsan NTP server by setting the 'Local NTP'
parameter  to  '1'.
Set the 'Announce Flags' registry entry to 5,
to  indicate  a  reliable  time  source.After editing any of the registry entries for
the windows time service, the service must be
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\restarted for the settings to take effect.
ervices\W32Time\TimeProviders\NTPClient\SpeciThe services can be started or stopped from
alPollIntervalthe service control applet in 'administrative
tools'. Alternatively the service can be
The 'Special Poll Interval' registry entrycontrolled via the DOS net command thus:net
defines the period in seconds that thestart  w32timenet  stop  w32time
Windows 2003 machine should poll the NTP
server. A recommended value is 900 seconds,NTP  Troubleshooting
which  equates  to  every  15  minutes.
A number of problems can be encountered when
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\configuring the Windows Time Service. NTP
ervices\W32Time\Parameters\NtpServeroperates using the UDP protocol over TCP/IP.
Therefore the TCP/IP network infrastructure
The 'NTP Server' parameter is used to providemust be operational for NTP to be effective.
a list of IP addresses or DNS names,Synchronisation issues may arise when NTP
separated by a space, of NTP servers that theattempts to synchronise to an inaccurate time
Windows  2003  machine  can  synchronise  to.reference or if network delays are excessive.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Synchronising  Time  on  Network  Devices
ervices\W32Time\TimeProviders\NTPServer\Enabl
edAs well as synchronising Microsoft Windows
servers and workstations, NTP can also be
Changing the 'Enabled' flag to the value 1used to synchronise network devices, such as
enables  the  NTP  Server.hubs, switches and routers. Any network
device that can synchronise to a NTP server
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\can be pointed to the Windows server to
ervices\W32Time\Parameters\Typeachieve time synchronisation. In this way the
whole network and accompanying infrastructure
Change the server type to NTP by specifyingcan be synchronised.
'NTP'  in  the  'Type'  registry  entry.



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