The project provides Internet access to very large virtual clusters of NTP servers. The time servers that make up the pools are volunteered and made public by individuals or enterprises that have servers on the internet. Pools of servers are located in most countries around the world. This allows clients to utilize a server that is relatively close, reducing round-trip delays and improving integrity. The project is a subscription free service that is used world-wide by thousands of clients.
Many computer systems and network devices are configured by default to synchronize to their time servers. You can also use the prefix 0, 1 or 2 to specify different pools of servers, if multiple server names are required:.
Almost every continent has a large number of clustered NTP time servers available. Including as of , Europe at , North America at , Asia at , Oceania at , making up a grand total of servers. Again, for each of these zones, you can specify a 0, 1 or 2 prefix if multiple server names are required.
For instance:. The domain names point to a random set of time servers in a particular zone that change every hour. From Austria. Email Address:. Published by Patrick Gruenauer. Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:. Email required Address never made public. Name required. Search for Get-Author My name is Patrick Gruenauer.
Is this page helpful? Please rate your experience Yes No. Any additional feedback? Caution Don't use the Net time command to configure or set a computer's clock time when the Windows Time service is running. Note If you have a computer with multiple network adapters is multi-homed , you cannot enable the Windows Time service based on a network adapter. Important Windows Server has improved the time synchronization algorithms to align with RFC specifications.
Note In this case, if you want to set the clock back slowly, you would also have to adjust the values of PhaseCorrectRate or UpdateInterval in the registry to make sure that the equation result is TRUE.
Note When you remove a Group Policy setting, Windows removes the corresponding entry from the policy area of the registry. Warning This information is provided as a reference for use in troubleshooting and validation. Note Some of the parameters in the registry are measured in clock ticks and some are measured in seconds. Ticks Property. Submit and view feedback for This product This page.
View all page feedback. In this article. Registers the Windows Time service to run as a service and adds its default configuration information to the registry. Unregisters the Windows Time service and removes all of its configuration information from the registry.
Monitors the Windows Time service. Converts a Windows NT system time measured in 10 -7 -second intervals starting from 0h 1-Jan into a readable format. Converts an NTP time measured in 2 -second intervals starting from 0h 1-Jan into a readable format. Tells a computer that it should resynchronize its clock as soon as possible, throwing out all accumulated error statistics. Displays a strip chart of the offset between this computer and another computer.
Displays the values associated with a given registry key. Displays the computer's Windows Time service information.
Enables or disables the local computer Windows Time service private log. Controls whether this computer is marked as a reliable time server. A computer is not marked as reliable unless it is also marked as a time server. Not a time server 0x Always time server 0x Automatic time server 0x Always-reliable time server 0x Automatic reliable time server The default value for domain members is Controls whether or not the chaining mechanism is disabled.
If chaining is disabled set to 0 , a read-only domain controller RODC can synchronize with any domain controller, but hosts that do not have their passwords cached on the RODC will not be able to synchronize with the RODC. Specifies the maximum amount of time that an entry can remain in the chaining table before the entry is considered to be expired. Expired entries may be removed when the next request or response is processed.
The default value is 16 seconds. Controls the frequency at which an event that indicates the number of successful and unsuccessful chaining attempts is logged to the System log in Event Viewer. The default is 30 minutes. Controls the maximum number of entries that are allowed in the chaining table.
If the chaining table is full and no expired entries can be removed, any incoming requests are discarded. The default value is entries. Controls the maximum number of entries that are allowed in the chaining table for a particular host. The default value is 4 entries. Specifies the smallest local clock adjustments that may be logged to the W32time service event log on the target computer. The default value is parts per million - PPM.
Indicates the maximum number of seconds a system clock can nominally hold its accuracy without synchronizing with a time source. If this period of time passes without W32time obtaining new samples from any of its input providers, W32time initiates a rediscovery of time sources. Default: 7, seconds. Controls which events that the time service logs. Time jump 0x2. Source change The default value on domain members is 2.
The default value on stand-alone clients and servers is 2. Controls the rate at which the clock is corrected. If this value is too small, the clock is unstable and overcorrects.
If the value is too large, the clock takes a long time to synchronize. The default value on domain members is 4. The default value on stand-alone clients and servers is 4. Controls the period of time for which spike detection is disabled in order to bring the local clock into synchronization quickly.
Specifies that a time offset greater than or equal to this value in 10 -7 seconds is considered a spike. Maintained by W32Time. Controls the dispersion in seconds that you must assume when the only time source is the built-in CMOS clock. Specifies the maximum offset in seconds for which W32Time attempts to adjust the computer clock by using the clock rate. Specifies the largest negative time correction, in seconds, that the service makes.
Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback? Note If an authoritative time server that is configured to use an AnnounceFlag value of 0x5 does not synchronize with an upstream time server, a client server may not correctly synchronize with the authoritative time server when the time synchronization between the authoritative time server and the upstream time server resumes.
Therefore, if you have a poor network connection or other concerns that may cause time synchronization failure of the authoritative server to an upstream server, set the AnnounceFlag value to 0xA instead of to 0x5. If an authoritative time server that is configured to use an AnnounceFlag value of 0x5 and to synchronize with an upstream time server at a fixed interval that is specified in SpecialPollInterval , a client server may not correctly synchronize with the authoritative time server after the authoritative time server restarts.
Therefore, if you configure your authoritative time server to synchronize with an upstream NTP server at a fixed interval that is specified in SpecialPollInterval , set the AnnounceFlag value to 0xA instead of 0x5. Note Peers is a placeholder for a space-delimited list of peers from which your computer obtains time stamps.
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