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. Specifies the largest interval, in log2 seconds, allowed for the system polling interval. Specifies the largest positive time correction in seconds that the service makes.
Specifies the smallest interval, in log base 2 seconds, allowed for the system polling interval. Controls the rate at which the phase error is corrected. Controls the decision to increase or decrease the poll interval for the system. Controls whether or not the DC will respond to time sync requests that use older authentication protocols.
Specifies the amount of time that a suspicious offset must persist before it is accepted as correct in seconds. An unsigned integer that indicates the time jump audit threshold, in seconds. Specifies the number of clock ticks between phase correction adjustments.
Value of 1 indicates that W32Time uses multiple SSL timestamps to seed a clock that is grossly inaccurate. Indicates that non-standard mode combinations are allowed in synchronization between peers.
The default value for domain members is 1. Specifies a space-delimited list of peers from which a computer obtains time stamps, consisting of one or more DNS names or IP addresses per line. Computers connected to a domain must synchronize with a more reliable time source, such as the official U. The default value on stand-alone clients and servers is time. Indicates which peers to accept synchronization from: NoSync.
The time service does not synchronize with other sources. The time service synchronizes from the servers specified in the NtpServer. The time service synchronizes from the domain hierarchy. The time service uses all the available synchronization mechanisms. The default value on domain members is NT5DS. The default value on stand-alone clients and servers is NTP.
The default value for stand-alone clients and servers is 0x Determines whether the service chooses synchronization partners outside the domain of the computer.
The default value for domain members is 2. The default value for stand-alone clients and servers is 2. Specifies the location of the DLL for the time provider. Indicates if the NtpClient provider is enabled in the current Time Service. Specifies the events logged by the Windows Time service. Specifies the large sample skew for logging, in seconds. Specifies the maximum number of times to double the wait interval when repeated attempts to locate a peer to synchronize with fail.
Specifies the initial interval to wait, in minutes, before attempting to locate a peer to synchronize with. Specifies the special poll interval, in seconds, for manual peers. Indicates that non-standard mode combinations are allowed in synchronization between clients and servers. Indicates if the NtpServer provider is enabled in the current Time Service. Controls the number of entries created in the Windows Time log file. The default value is none, which does not log any Windows Time activity.
This value does not affect the event log entries normally created by Windows Time. For the remainder I agree almost with you, beside recommending one such ntp service per site, if an organisation has multiple sites. This service configuration allows the configuration of multiple time sources. When I was setting up the Internet access point of my site, I detected that this access point has also a section for ntp service.
So I activated and configured it to my needs. I then configured all devices with ntp option on my network to use this local access point as time source. Hence I didn't need to open any firewall for time service, regardless of operating system. As far as I understood, it is possible to get an initial time via the net time command but it is no longer possible since W2k8 to configure ongoing time synchronization via this command but need to use the corresponding Windows service instead via w32tm.
Domain computers could sync their times with the domain controller which holds PDC Emulator fsmo role. This computer that I ran it on, was at one point set to DN I am wondering if that is causing problems and show disable the GPO and see if it starts working again.
Sorry for a much too long answer update. I still ended up having problems for quite a while and finally got around to figuring it out. A Firewall rule for secured NTP had been pushed out to all systems. Once we saw that rule in the firewall settings, we disabled it and everything started working correctly again. To continue this discussion, please ask a new question.
Get answers from your peers along with millions of IT pros who visit Spiceworks. I even tried unblocking and just to see if that would make a difference as well. For details of Windows firewall port settings, click on Figure 1,2 and 3. Figure 1: Windows 8 Firewall, Advanced Settings.
Figure 2: Configuring the Inbound port rule in Windows 8. Figure 3: Configuring the Outbound port rule in Windows 8. Depending on the type of the Windows PC e. This problem has not been observed with the w32time version which has been shipped with Windows , only with later versions. Using some commands in a command line window, the behavior of w32time can be changed so that w32time sends the correct "client" mode request packets.
The changes are saved permanently in the Windows registry. To make any w32time changes in command line window one has to run cmd program as administrator see Figure 4. Figure 4: Run cmd program as administrator.
The flag "0x8" forces w32time not to send "symmetric active" packets but normal "client" requests which the NTP server replies to as usual.
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