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Questions tagged [time-synchronization]

257 questions
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What problems result from servers not time-sync'd?

What problems might arise within a domain when the member servers are not properly time-sync'd? I'm aware that log entries are incorrect making troubleshooting more difficult in time-sensitive operations. But would there be other symptoms, perhaps…
Robert Kerr
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Can't synchronize time in Ubuntu (Europe/Moscow)

I've got this Ubuntu server virtual machine. I'm trying to setup a correct time on it. I've selected a proper timezone (Europe > Moscow) via sudo dpkg-reconfigure tzdata. After that, I'm using the following command to synchronize the time: sudo…
Slava Fomin II
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Why doesn't the time match on two Windows Domain Controllers despite resync?

In my domain there are two domain controllers, there is a gap of 3 minutes between their times and than I can find this difference between many clients (it depends on their DC). If I run this command: w32tm /monitor I can see that DCs can see each…
Tobia
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EC2 - MS Server 2012 constantly resetting its own time

I have an EC2 box of instance type m2.4xlarge running Windows Server 2012 Standard in a VPC in US-West-2. The following ports are open inbound: TCP 1433 (MS SQL) TCP 3389 (RDP) UDP 123 (time synch) ... and the following outbound: UDP 37 UDP…
antinescience
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System clock jumps over 50 seconds randomly

Having a really strange and frustrating issue with system clocks across a few (non virtualized) Ubuntu 12.04 servers. The system clock jumps unpredictably by over 50 seconds. Here's a part of the loopstats file while using ntp: 56771 23997.310…
grepjuice
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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 -L -n -v Chain INPUT (policy DROP 260 packets, 51849…
User
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vmware esxi wrong time after vmotion

After vMotion some guests went 2 hours ahead in time. 2 hours ahead of UTC is exactly our timezone. Why would it do that? AFAICS both source and destination hosts have the same configuration. But apparently not. What could be wrong?
Marki
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Manually syncing comp clock with DC works, but after a minute - clock incorrect by 5 minutes

The problem: DC1 Clock: 17:23 AD joined client clock: 17:28 After client> w32tm /resync time is in sync, but the clock again jumps forward for 5 minutes for client. It always happens in less than a minute. Ok, maybe syncing from somwhere else. I…
Janis Veinbergs
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using NTP protocol for internal time synchronisation

I have two embedded system that are connected via ethernet. I want them to run synchronously. Using NTP protocol is an option to synchronize them. But this is a isolated system. I don't have an Internet connection. Is it possible to use ntp protocol…
zontragon
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Windows Server 2012 DC loses time sync after reboot/dcpromo

I'm currently experiencing an issue that has baffled me for the past few days as none of my searches here or google yielded in any positive results. Our current environment has 19 sites with as many DCs all running Windows Server 2003. The FFL and…
Francis Ouellet
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Does CentOS 5.4 properly handle leap seconds?

Apparently the IERS have announced a leap second due at midnight, June 30th this year. Is CentOS/RHEL 5.4 properly updated to support/transition along with updated NTP systems? I was under the impression that it would need an updated tzdata…
Mike B
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State of the art auto time sync?

Placing ntpdate into cron seems to be no longer a good idea. What is an easy state-of-the-art automatic environmental friendly ;-) sleek way of keeping a (debian) server's time clock up to date?
powtac
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Anybody tried to use graphic card as a precision clock on a Windows server?

I am thinking (constantly) how to make my server be synchronised better than it is. I run some cheap app which syncs me with some stratum 2 server on the colo and drift is about 1-2 ms per 10 sec (when the box is not too busy). I want better…
Boppity Bop
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Windows NTP client changes timezone to Pacific automatically

I have a Windows 2008 server machine and I am trying to use this public IP 128.252.19.1 to synchronize the time, however, I would like my system to have Eastern timezone. When I enter the configuration using the steps give on this support page:…
Zain Ally
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How to return to Default settings of NTP/Time server on domain with GP

This is an Edit - according to the comments, I may have not been understood/ Facts: I have a Windows 2003 Domain PDC Emulator is enabled and working correctly on my DC I have a GPO that is NOT working correctly I WANT my clients to sync with the…
Saariko
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