Questions tagged [time-synchronization]
The time-synchronization tag has no usage guidance.
35
questions with no upvoted or accepted answers
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Why did w32tm /resync cause it to correct itself, then overshoot?
Background:
My LAN's Windows Server 2012 R2 Domain Controller had been running without any external time server for a few years and I finally synchronized it now. It had been running about 2 minutes ...
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4
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Time on Windows Server 2003 off by ten minutes
I have a DC server that runs a network of about 20 computers. This is also the DC and pushes out the time to all the client computers.
However the time on the server is 10 minutes fast and is causing ...
- 279
3
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1
answer
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NTP using GPS and PPS as clock, PPS is marked as falseticker
I am attempting to add a GPS-based clock source to my network, using a GPS which emits a 1-PPS clock pulse. This is connected to a GPIO pin.
After allowing ntpd to run for 30 minutes or so, the PPS ...
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3
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Windows server time keeps setting the time 2 hours back
Our Windows 2012 server keeps setting its system clock 2 hours back.
I've tried to run 'w32tm /resync' a couple of times but that does only works on short term.
the server manager gives an Error ...
- 51
2
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0
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What is the packet count in timedatectl timesync-status command
I am trying to understand the output from the timedatectl timesync-status with an example shown below:
Server: 91.149.91.123 (ntp.ubuntu.com) Poll interval: 32s (min: 32s; max 34min 8s)
Leap:...
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2
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2
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Why does my Ubuntu virtual machine hosted in Hyper-V power on with a date in the future?
I have several Ubuntu virtual machine running within a Hyper-V server. The server is a Windows 2012r2 machine. The Ubuntu VMs are either Ubuntu 14.04 or Ubuntu 16.04 (the current LTS releases).
...
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2
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1
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358
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PDCe won't accept external time source
I noticed our PDCe is running 1:20min late and, of course, also the rest of devices in the network. I'm trying to sync with an external time source but it's not going well.
It's a virtual Windows ...
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2
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0
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ntpd -gq do not working on CentOS 6.4
when I'm running 'ntpd -gq' from CentOS 5.10 (i686) the time is synced, but in CentOS 6.4 (x86_64) the command gets stuck (I need to stop it using ctl+c).
Any idea hoe to fix it?
EDIT:
iptables -...
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2
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3
answers
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Finding process name that changes windows time
I have a problem in my server that the system time is automatically getting changed by a day and getting back to normal. I have some software installed for time sych. But the master clock seem to be ...
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399
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NTP client synchronizes with LOCAL instead of stratum 1
I have 2 NTP servers. One synchronized directly with a GPS clock (I will call this server 185), so st 0.
Then I have a second one (Let's call it 186) that should synchronize with the 185 since it is ...
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1
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0
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758
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PPS Integration with chrony
I am trying to get chrony to ingest a PPS signal to compare against just an NTP server. The PPS signal is recognized when I do ppswatch and ppstest, but when I do chronyc sources, the LastRX field ...
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1
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0
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154
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NTP reach property equivalent for timedatectl command
The ntpq -p command returns information which includes the reach and when properties as shown in the example:
remote refid st t when poll reach delay offset jitter
==========...
- 131
1
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0
answers
224
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Hyper-V DC VM time keeps reverting after resync
I have a domain controller running Windows Server 2016 in Hyper-V on a Windows Server 2016 Host. My time is off by 9 minutes. I've configured the following command to force custom NTP servers to be ...
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How to configure ntp server and chrony client for time sync over link-local IPv6
I have two computers connected with an Ethernet cable. The first computer, let's call it the "master" is also connected to the Internet via a wireless network. It's running ntp and getting its time ...
1
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372
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How to configure a redundant PTP server
I have a Sonoma GPS time server and a server, which should synchronise itself to the GPS clock, and serve as a fallback option. The time should be synchronised using PTP (Precision-Time-Protocol). ...
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1
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2
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EC2, Ubuntu: Serious time difference between servers
Some of my tests on EC2 servers began failing. When I dug in, the reason was serious time mismatches between my servers:
Sun Jun 22 14:43:43 UTC 2014 # Laptop
Sun Jun 22 14:46:36 UTC 2014 # Server #...
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1
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329
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Wrong time on RODC after dcpromo
My team has been experiencing this strange problem: After doing dcpromo (followed by reboot), the time on the newly promoted RODC rolls back to the year 2011.
Before dcpromo, the time is correct.
...
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1
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2
answers
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How to clear/flush ntp server peer in Centos
We were using centos.pool.ntp.org for our clock sync among servers. Now we do ave a local NTP server, but the problem is servers are using the old ntp.
From centos.pool.ntp.org we can see,
*202.71....
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0
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WS_FTP Server - All Files Older Than 30 Days Show Date but NO Time Stamp
Picture from FileZilla of the root of my FTP Server running WS_FTP Server 7.5.1.2 on Windows Server 2003x64 Standard sp2
Notice how the first file folder shows the date 8/24/2011 but no time and the ...
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0
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0
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118
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Windows server time going back to past due to time synchronization with the hardware clock
For two months we are facing issue on our Windows Server 2016 server every 10 days.
Server time is going back by one hour with the below message in event log.
The system time has changed to 2023-12...
0
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1
answer
74
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Both LOCAL SERVICE and SYSTEM users are changing server time on DC
Odd one for you, our DC's time keeps changing by an hour, but it doesn't just go down by an hour it also go up. I've been monitoring the event logs and I can see that there are usually two entries ...
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0
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Windows Server 2012 R2 with hour/time issues
In my office, we have a Windows Server 2012 R2 with our SQL Server on it.
We are located in a UTC-7 timezone where we "suffered" DST (but not anymore).
Multiple times a day, our server clock ...
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0
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0
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570
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Windows event log shows events in the future
One of my Windows server VMs seems to be time travelling without my permission:
Screenshot of Windows Event Viewer
The text reads:
time service was not able to sync the system time since 1601267 ...
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0
votes
1
answer
673
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systemd-timedated.service: Failed to determine whether NTP is enabled: Link has been severed
Encountering this issue with RHEL 7.9 (Maipo).
One server in particular is having issues with timedatectl, systemd-timedated.service, and chrony.
If we run timedatectl
$ timedatectl
Failed to query ...
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0
votes
1
answer
473
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2008r2 clock running fast
I have 27 2008R2 servers (all Hyper-V guests) that recently started running fast. There are other 2008R2 servers on the same hosts that run spot on. The time averages from 2 to 3 minutes fast but at ...
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0
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146
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How to read VMware interrupt backlog?
The VMware document titled "Timekeeping in VMware Virtual Machines" have the following referente to the issues with the time drift:
If the virtual machine is running too slowly, perhaps as a result ...
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Time propogates with an offset
The network is simple,
Two Domain Controllers
Servers
Client Workstations
Other Devices
The primary DC is configured to synchronize time with NTP servers. The secondary DC and other Servers are ...
- 121
0
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119
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Ubuntu CDT time lags by 1.5 min
My servers are Ubuntu 14.04 on AWS. Our application actually needs time in CDT. By default it was UTC, so I created a sysm link for localtime.
ll /etc/localtime
lrwxrwxrwx 1 root root 27 Sep 14 03:53 ...
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262
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Should Domain Controller Sync the time if there is time difference between locations
I have the Primary DC in Toronto syncing time as NTP. I have a read-only DC in Tokyo, the time sync is NT5DS, so all my servers, PCs on remote site got wrong time now. Do I have to set this read-only ...
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0
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1
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503
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how do i force NTP client to symc from the server (windows 7)
i need to make my NTP server to force my NTP clients to sync with him once n a few hours .
until now i used the "task scheduler" to set a task in each client to sync with the server but now i have to ...
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0
votes
1
answer
98
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How do I set up a Windows image (not part of the domain) to sync time with the domain controller?
I'm creating a Windows image to distribute to computers, and I want to set it up so that it will sync time to the domain. The problem is that the image is not joined to the domain, so w32tm /config /...
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2
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Hyper-V Centos VM System Time go forward
I have hyper-v virtual machine with Centos OS. My system time is always an hour ahead. I tried disabling the time sync in Hyper-V VM settings but to no avail. As I can see, the hardware time is ok..
...
0
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1
answer
728
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Windows 10 eventually changes time to UTC
I have 9 Windows 10 clients for whom I can not set the time. I proceed to date and time, change the time to the current time and timezone and then within an hour the time reverts to what appears to be ...
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1
answer
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chrony time synchronization problems
We have a cluster where exact time synchronization is very important. We use Ubuntu 20.04 servers and and chrony. Unfortunately there are always problems with time synchronization. No other known time ...
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1
answer
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Computer does not print, accept remote-connections nor open SMB folders until restart
I encountered a Windows 10 which seems to have problems with authentication. The computer does not accept remote connections, does not open smb-folders or print a file (no error shown, when the pc ...
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