NTP stands for Network Time Protocol, and it is an Internet protocol used to synchronize the clocks of computers to some time reference.

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NTP not syncing, only syncs on service restart

My ubuntu 11.10 server has been sitting there quite happily for the last 3 - 4 months, then suddenly the time started going out of sync by one hour. I'm not sure why, nothing has changed re the ...
2
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2answers
1k views

State of the art auto time sync? [closed]

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?
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3answers
1k views

sync time on linux using ntp and persist it

on linux to sync time with ntp you say ntpdate pool.ntp.org however after reboots, the time gets reset to some odd value again. is there a way to persist the changes? how do I set the computer ...
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2answers
2k views

Change Domain Controller time +5 minutes

I have medium-sized Windows network of 60 workstations and 10 servers (2 of which are Domain Controllers). One DC holds the FSMO roles including the PDC Emulator. This the DC with PDC does not sync ...
2
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2answers
274 views

Windows 2008 - Time Sync

What is the threshold in Windows 2008 when the local clock differs from an NTP source and it will not synchronize? For example, if the local time is off > 2 days, will NTP still sync? Is there a ...
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1answer
2k views

Windows 2008 R2 64 bit multihomed. NTP time synching issue

I have a DMZ machine that i wish to sync to a time source ().pool.ntp.org. Perimeter Firewall is setup to allow relevant ports through. Obviously local FW on the server is on and configured to allow ...
3
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2answers
938 views

Increasing time difference between Windows Server 2003 and time.nist.gov even after explicitly syncing time

I have synced the time of my server to time.nist.gov. This server communicates with a client’s server which is also synced with time.nist.gov. After noting that we seemed to be out of sync with the ...
2
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1answer
831 views

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 ...
0
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1answer
954 views

Meinberg ntp for Windows - force more frequent updates?

I have a Windows VM that has time drift problems, and left to its own devices will drift by minutes per day. I know there are issues with time on VMs, but I was hoping using the Meinberg NTP service ...
2
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1answer
993 views

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 ...
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1answer
3k views

How can I disable NTP in pfsense?

I am running my pfSense gateway in a ESXi server. right now the server gets its time from the NTP server specified in the general settings section of the WebGUI. I want to disable this so pfSense ...
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1answer
146 views

Current time is off on a Windows 2003 Server DC

I have a single server that is also a domain controller in a cabinet, there are no other servers attached to its domain. I've reset the time in the BIOS (from what I recall) and in Windows to the ...
1
vote
1answer
393 views

NTP on main server, and alternative on virtual (LXC)

I am setting up a server with several VPS. I am using LXC. I am thinking it would be better to have only the main server equipped with ntp and have the virtual boxes just get the time from the main ...
1
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1answer
639 views

Windows XP NTP client authentication

I'm trying to configure a Windows XP NTP client to authenticate to a local NTP server on our closed network. How can I make this happen? One article I've found for configuring the client to talk to a ...
2
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1answer
270 views

Is it possible to monitor NTP through SNMP in Linux

Is it possible to monitor the NTP drift value ( I mean measuring the time difference between the NTP server and the server that I am trying to monitor) using SNMP.
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3answers
4k views

How to configure an authoritative time server in Windows Server

I have a performance lab running behind a firewall, so none of the machines in the lab has internet access. All machines in the lab are part of a domain with the domain controller also present inside ...
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0answers
64 views

NTP problems in one AD OU?

We have one domain with OU's for each geographic site. We have five physical sites; one in Asia, two in Europe, and two in the U.S. (not sure if this might have any bearing on the situation). One ...
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2answers
22k views

WS2008 NTP - Using time.windows.com,0x9 - Time always skewed forwards

I have a domain controller configured to use time.windows.com (with 0x09 flags set). I've noticed that frequently the systems' clock is fast - it varies from 10 minutes to even 45 minutes. I always ...
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2answers
292 views

Virtualizing NTP server [duplicate]

Possible Duplicate: What are the limits of running NTP servers in virtual machines? I was wondering if virtualizing NTP is okay. I have a VMware ESXi 5.0 box, and I want to virtualize my ...
4
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3answers
6k views

NtpClient will wait 3473457 minutes (over 6 years!) before it will do a new attempt of DNS resolution, eventid 134

I find the message hilarious and at first I thought it was some joke from an over-active programmer of the MS team, or a hoax. However, the message appears again and again, a couple of times a day: ...
0
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1answer
820 views

NTP doesn't sync

I'm using Meinberg NTP to sync the time in a VPS. The clock refuses to sync - there's a ~30s shift comparing to other servers. Also ntpq -p is continuously showing zeros for reach, delays and ...
4
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4answers
609 views

Make Windows Server 2008 periodically update internet NTP

I have read a bunch of posts and other information on the internet and I have yet to come across the solution to this question. On a windows network, all the computers sync up with the domain ...
2
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1answer
6k views

How to disable NTP client on Windows Server 2008

I configured a Windows Server 2008 machine to be an NTP client using some instructions I found elsewhere. net stop w32time w32tm /config /syncfromflags:manual /manualpeerlist:"0.pool.ntp.org, ...
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1answer
176 views

ntp multicast address

A silly question probably, but guess I need to ask. If I've got four centos boxes that are acting as ntpd multicast servers, will the multicast address configured in each box's ntp.conf all be the ...
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3answers
7k views

How to synchronize time between a Windows client and a Linux NTP server?

I want my Windows 7 machine to get its time from my Linux Debian Sid server. So I want ahead and installed OpenNTPD from the Debian repository. It doesn't listen to anything by default, so I ...
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5answers
785 views

Accurate, Unspoofable Time Source

I need an unspoofable and accurate time source. Short of setting up my own atomic clock (unless that's easier than it sounds) how could I accomplish this? It's not that I don't trust the NTP ...
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2answers
149 views

Better to use same or closer NTP servers when distributed?

I have a group of servers located in several data centers. They should all be synced so that they have the same time, and ideally, should also have the correct time. Is it better to sync them all ...
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2answers
685 views

Ubuntu Enterprise Cloud - NCs down and time synchronization

I'm having trouble with my cloud installation. I've installed everything from the Ubuntu Server 11.04 CD, then upgraded the system to the latest version (apt-get update && apt-get ...
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3answers
496 views

NTP with US Chicago time - issue

We are trying to configure NTP with Chicago time but it is showing the st 16u. Also cant see any reference (*) to amy remote server. >>ntpq -p remote refid st t when poll ...
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2answers
3k views

How can I install ntpstat on Ubuntu?

I'm running Ubuntu server 10.04 64-bit. What I've tried: apt-get. doesn't know of it. downloading rpm from here and converting with alien dpkg-gencontrol: error: current host architecture 'amd64' ...
8
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3answers
269 views

Managing multi-timezone servers

What would be an ideal time and timezone setup for multi-country servers? Especially considering one central IT team managing these servers. Currently we have each server using a local timezone. e.g. ...
2
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1answer
2k views

How can I sync time between two ubuntu computers, not connected to the internet

I have two computers connected to each other over an ad-hoc wifi. How can I make the first computer always sync to the time of the second computer? I tried playing with NTP, but could not figure out ...
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2answers
2k views

How does one make sure or even guarantee server time are sync correctly between dozens of servers across multiple datacenter on different location?

Currently our web applications contain a logic to check if the data sent to the web server is expired or not by comparing the timestamp of the data with the date/time of the server. Everything goes ...
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2answers
197 views

Windows time service on Windows 2003 Server DC that provides RAS

The scenario: A Windows 2003 Server, that is the only DC in the network (192.168.1.10/24), is configured to synchronise its time from another NTP-Server (Linux machine with radio clock, IP ...
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1answer
4k views

NTP time sync over PROXY [closed]

I have a machine that is on a network with a proxy server... The ntp sync fails to go through the proxy, how can I make it go through?? What configuration is needed on my machine?? does it necessary ...
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4answers
559 views

Getting time to sync with NTP on Centos 5 VM

My Centos 5 VM is drifting time. I have scoured different answers to solve this problem. I've looked at the VMWare's tips and added tinker panic 0 on top of my ntp.conf file. I also changed the ...
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1answer
292 views

How can I sync Windows XP automatically to an NTP server? [duplicate]

Possible Duplicate: How to synchronize the clock of a windows server 2003 domain server? My server keeps losing a few seconds per week. I would like to automatically sync without the need ...
4
votes
1answer
279 views

NTP sync time frequently on Windows 7

I have several Win7 64bit configurations - local dev machine, remote server, VPS. I'm running time sensitive tasks on all of them, therefore I need Windows Time service to: Sync Sync well ...
3
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2answers
427 views

Delay NTP Initialisation, Cisco 877W, IOS 12.4(24)T1

I have a Cisco 877W which I'm using for my home ADSL connection (and as a refresher in Cisco IOS). I've got a working config in-place with my PPPoA connection coming online correctly, and VLANs and ...
2
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1answer
1k views

Issue with NTP configuration

I am working with RHEL-6 64 bit server. When using ntpq -p I get the following result: $ ntpq -p localhost: timed out, nothing received ***Request timed out With RHEL 5.4 we were using a ntp ...
1
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1answer
350 views

NTP Pulling UTC from Time Source but not applying offset

I am seeing some weird behavior that started after the last round of windows patches. My forest root PDC emulator no longer applies the EDT offset from UTC and instead just uses UTC. This of ...
0
votes
1answer
215 views

How to improve NTP-fidelity on Windows 7

My Windows 7 Ultimate N SP1 64bit workstation is configured to synchronize with a local Debian squeeze NTPd. After triggering synchronization manually from the configuration dialog, Windows claims to ...
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5answers
13k views

ntpdate -d Server dropped Strata too high

I cannot sync with a NTP source thats coming from an internal router/firewall. Anyone help ? ntppdate -d 192.168.92.82 6 Jun 11:57:30 ntpdate[5011]: ntpdate 4.1.2@1.892 Tue Feb 24 06:32:26 EST ...
2
votes
1answer
2k views

Nagios NTP, discarding peer

We're using nagios *check_ntp_time* for monitoring time on our servers. Unfortunately the service is flapping. And reporting a lot of false-positives. It happens everytime for random server in random ...
0
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2answers
2k views

configure Centos with NTP

I would like to configure my servers to use NTP. I would like them all to use GMT time zone. I would like to use public NTP server how do I do it?
2
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2answers
276 views

ntpd Stratum Zero when nptd is started

I have noticed that when I start ntpd on a server, checks against that server reveal that it has a stratum of zero. If I understand this correctly, I believe this means that ntpd is currently only ...
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2answers
1k views

Synchronizing time with only one NTP server

I have a linux machine on a network where the machine only has access to exactly one NTP server. After the time synchronization the status looks like this: [root@test ~]# ntpq -p remote ...
3
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1answer
669 views

ntpd crashes without removing pid file

We occasionally have seen time differences on our servers, and confirmed that: ntpd crashed without any traceable logs ntpq process was dead, but pid existed at /var/run/ntpd.pid /etc/init.d/ntp ...
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2answers
486 views

Seemingly high clock skew between four systems, normal?

I'm researching a bit of a problem maintaining time synchronization between systems. I finally decided to measure the actual clock variance between hosts, and found that over the course of 13 hours, ...
4
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2answers
343 views

Synchronize time on a private network that must not connect to the Internet

For HIPAA compliance, this network can not be connected to the Internet or to any other network or computer which connects to the Internet. I've got a small private network comprised entirely of Macs ...