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5
votes
4answers
35k views

How to synchronize the clock of a windows server 2003 domain server?

Given a windows server 2003 domain server, I'd like to sync it's time to (any) external time services (it's off a couple of minutes). How to do this 1, manually; 2, in an automated manner every week?
3
votes
2answers
4k views

Domain Controller time is 7 minutes fast

I have a Server 2008 R2 domain controller running in VM on Hyper-V that is 7 minutes fast which I need to fix. I understand that this maybe down to the DC running in VM's. What I would like to know ...
8
votes
4answers
13k views

How to set a frequent period for NTP client to sync with the NTP server

I've setup an NTP client for my DC to sync time with time.windows.com but I want it to query the NTP server at least twice a day. I made all the changes via the registry, is there a period registry I ...
27
votes
12answers
8k views

Is anyone using GPS for time sync?

I've come across a handful of GPS NTP servers, as well as some inexpensive solutions using off-the-shelf receivers and software. Right now I'm just using NTP with a list of servers over the Internet. ...
13
votes
8answers
15k views

How do I update a CentOS server's time from an authoritative time server?

I have CentOS machine and each time I've noticed that the server loses correct time after a while. It is usually behind by several minutes after time passes from having manually set the correct time. ...
6
votes
7answers
12k views

Hyper-V Machine drifts time all over, even with NTP

Resolved The problem was Hyper-V on that machine. I removed Hyper-V, installed VMware Server, ran the same VM. Time sync issues went away (< 100ms difference after a day). My setup is like this: ...
0
votes
1answer
2k views

ptp time synchronization on centos6/rhel

I need to setup time synchronization using PTP (precision time protocol). I'll get server address. I found ptpd server (version 2.1). I created startup files in /etc/init.d. But wondering what options ...
4
votes
3answers
1k views

Best way to synchronise the time on a Windows 2008 Server

I have a small Windows domain (all servers running Windows 2008), with a single Windows 2008 Domain Controller. What is the best way to synchronise the time across all servers with an Internet Time ...
2
votes
4answers
366 views

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 ...
2
votes
2answers
6k views

Time not propagating to machines on Windows domain

We have a two-domain Active Directory forest: ourcompany.com at the root, and prod.ourcompany.com for production servers. Time is propagating properly through the root domain, but servers in the child ...
9
votes
9answers
5k views

Time drift

How do you deal with server time drift?
2
votes
2answers
573 views

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 ...
2
votes
5answers
2k views

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 ...
1
vote
1answer
999 views

KVM guest time shift on host reboot

I have installed Ubuntu server 12.04 as a KVM host, and created an Ubuntu guest that is also running Ubuntu server 12.04. The servers are in the AST time zone which is UTC + 3 hours. After setting the ...
1
vote
2answers
16k views

Windows 7 machines won't sync time

I configured my Windows Server 2008 box as an authoritative time server using the instructions here: http://support.microsoft.com/kb/816042 Port 123 is open for incoming and outgoing connections on ...
0
votes
3answers
2k views

Incorrect time source on DCs Server 2008 domain?

So we had a user complain about the clocks being a minute out on her desktop and how she always misses her train as a result. Despite my incredulous reaction to such a thing it did prompt me to ...