Network Time Protocol, used to synchronize clocks on the Internet.

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No ntp.conf file after compiling ntp on Linux

I'm using RHEL 6.5. I compiled ntp-4.2.8 using the steps on this link. but I don't have a ntp.conf file. ntp.conf is required to start ntpd but after compiling, there is no ntp.conf on my system. I ...
2
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0answers
23 views

Windows Server 2012 time keeps setting itself 12 minutes ahead [migrated]

Our Active Directory server has a problem whereby the time keeps setting itself 12 minutes ahead of the real time. This causes authentication issues on the network. I have tried syncing to an ...
0
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0answers
11 views

update time from a desired NTP once in windows

OK, I normally used to configure time from a machine (myservername) that is an advertized windows net time server in my domain net use \\myservername /set Well this set the time value of the server ...
0
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1answer
27 views

GPS without PPS vs. GPS with PPS vs. NTP

With which time synchronization method I can achieve more accuracy to the absolute UTC time? I use GPS with PPS for now but I want to compare these sources. Assume the following items: Internet is ...
0
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1answer
21 views

Windows 7 time synchronization does not work

I have a strange behaviour when trying to connect to time server on my freshly installed Win7 x64 SP1: First of all, normally you need to pass a UAC check if you want to enter a timeserver, this does ...
0
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1answer
56 views

NTPD not updating time date on CENTOS

I have set up ntpd on CENTOS, I am trying to get it to pull time from a Windows domain contoller if i run the command: ntpdate dc3.mydomaain.local this works fine and updates the host with the ...
2
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2answers
41 views

Can NTP be set to load a time from file in case it can't load from network?

I've looked at the documentation but can't find anything like this. The situation is that I have a BeagleBone Black which does not have a real clock. By default, the computer boots up thinking it's ...
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2answers
91 views

How to sync time with a time server on Windows 7 and 8.1?

I'm booting quite a few different OSes (Windows 7, Windows 8, Ubuntu 14.04 LTS and OSX Mountain Lion) all installed on separate drives. I've read that this can sometime cause the time to go off so I ...
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18 views

Time server ports for iOS devices [closed]

I see that port 123 is used for the time server. Our network admin wants very specific details about what servers our iPads will need to connect to retrieve the sync time. Port 123 TCP/UDP ...
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0answers
26 views

ntpd works not as expected when the offset becomes large

I changed the /etc/sysconf/ntpd with the option -x added in ntpd client server.And I found ntpd works fine when the offset between the client and server is less than about 10 minutes.If more than 10 ...
0
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1answer
92 views

Windows NTP Client Not Syncing with my ESXi NTP Server

I have an ESXi 5.1 server configured as a NTP server and a local Windows Server 2008 R2 PC that aren't syncing. I've read that whenever an ESXi server is run as a client, it also acts as a server, so ...
3
votes
1answer
131 views

How can I check whether my NTP daemon has PPS support?

I have already read about compiling NTP with timepps.h provided to get PPS support. Is there an easy way to check the already precompiled or rather installed version of an repository (Ubuntu 14.04.1, ...
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vote
1answer
141 views

Windows 7 Time syncing issues

I've had this issue for a very long time and I often search google for solutions and try whatever I find but nothing works and then I give up, only to repeat the same process a few weeks later. this ...
0
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1answer
101 views

unable to install ntpdate on centos

I'm running centos 6, unable to get ntpdate working, what's wrong? ntpdate pool.ntp.org bash: ntpdate: command not found x yum install ntpdate Loaded plugins: fastestmirror, security Loading mirror ...
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0answers
58 views

How to setup a NTP Server on Freshly installed Windows Server 2003?

I am to replicate a scenario of a deployed site in which they use the Window's Time Sync feature (found in this tutorial) to connect to a local time server and synchronize their time. So I prepared a ...
0
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1answer
53 views

Questionable NTP Traffic at Firewall?

I checked my firewall logs and noticed odd traffic patterns for NTP or UDP/123 (shown below). I don't understand the round robin'ing that's occurring from my hosts. And I don't understand why its ...
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0answers
168 views

NTP Multicast configuration

I'm trying to get NTP multicast set up between a few computers. Right now I'm getting NTP multicast packets from a computer that I have neither access to nor information on (let's call that A) that is ...
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1answer
61 views

Write Internet Time to a file from windows command line

I want to write the time of an internet time server to a text file from within windows server 2012 command line. Does someone knows how to do that? Thanks!
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1k views

Why does NTP require bi-directional firewall access to UDP port 123?

From What are the iptables rules to permit ntp?: iptables -A INPUT -p udp --dport 123 -j ACCEPT iptables -A OUTPUT -p udp --sport 123 -j ACCEPT Also, from the NTP website: ... ntpd requires ...
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97 views

NTP syncs with ntp.ubuntu.com but not with the pool options

I am trying to configure my ntp server to synchronize with ntp servers available online. Below is my /etc/inet/ntp.conf and my ntpq -p output # ident "@(#)ntp.server 1.6 00/07/17 SMI" # # ...
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1answer
1k views

Motorola MC3190 - Windows CE 6.0 configure device time through registry

I have to configure a Motorola MC3190 running Windows CE 6.0 to use a time server to automatically set the time after a cold boot, including the timezone. This is my current configuration, found in ...
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91 views

how to trace and correct the source of time difference between two different clients having the same NTP Stratum 2 source

My standalone server is connected and taking time from a dedicated NTP hardware that is synced to UTC through GPS. All clients in the network are connected to this stand alone server and the clients ...
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4answers
4k views

NTP - How are NTP servers so accurate

I've noticed that on my servers and other machines the clock always drifts so it has to sync up to remain accurate. How do the NTP server clocks not drift and always remain correct?
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1answer
104 views

Daylight savings issues in windows, possibly related to NTP sync

We have an app deployed to information kiosks across a number of sites, where employees of our client can log in and sign-on/off their shifts and view timesheets etc. Approaching every daylight ...
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479 views

Implications of disabling VMICTimeProvider (Windows7)?

I have a private network of two machines: one is Windows 7 and the other is not windows. I want the Windows7 machine to run an NTP server for the non-windows machine to synch to. The instructions in ...
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0answers
104 views

ntpd & ntpdate won't set time

I recently purchased a new development board and, unfortunately, the edition of Linux provided doesn't sync with an NTP server automatically. I have tried using "ntpd -dgq", however the output is ...
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1answer
2k views

Sync windows 8.1 time with NTP server when boots up?

I have an issue with BIOS causing time to be reset in 9 of 10 times when system boots up...While windows 8.1 somehow trusts the time from BIOS more than NTP, how can I force the windows to sync with ...
0
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1answer
176 views

5 Feb 16:53:26 ntpdate[414]: no server suitable for synchronization found

I want to setup ntp in beaglebone based custom board. /etc/ntp.conf file content is as mentioned below driftfile /var/run/ntp.drift server pool.ntp.org server 1.in.pool.ntp.org server ...
2
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0answers
175 views

Godaddy fails to properly configure NTP on their node server hosting my VPS [closed]

I have a few VPS servers with Godaddy and with every new server I contracted I had to ask them to set up NTP on the node hosting my container. They always did until now. It seems like their ...
1
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2answers
568 views

Setting Time in Lubuntu

I have a time server running on a server PC that is meant to change the times of various guest PCs as a result of a TCP/IP command on port 9000 issued by a control application running on an integrated ...
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1answer
724 views

Why does my router send an NTP request to ntp.nasa.gov?

I have enabled logging on my router and restarted it. At the end of the log file it says: Sat, 2000-01-01 02:02:19 - Send out NTP request to ntp.nasa.gov Wed, 2014-01-15 18:01:39 - Receive NTP Reply ...
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2answers
260 views

Can I use different server IP address in NTP time synchronization?

By default, it is something like, server 0.rhel.pool.ntp.org server 1.rhel.pool.ntp.org server 2.rhel.pool.ntp.org Can I choose my server IP address for synchronizing time?
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2answers
2k views

How to correctly sync time in linux running as virtual guest after host resumes from hibernation?

I use multiple virtual boxes for development and correct time and date is important for me when I push git commits. I do not shut down my host - it runs for months without restarting. I only hibernate ...
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0answers
85 views

How should I troubleshoot a Qnx ntp synchronisation issue?

I setup the w32time service to act as an ntp server, and it has been confirmed on at least one other client (MacOS X). I've used a few different utilities in Windows that indicate that there indeed is ...
0
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2answers
757 views

How to setup robust Windows time synchronization?

I have an incorrect time on my Windows machine. I'm not sure how to specify the proper timezone and setup an NTP synchronization. When i'm using a dualboot configuration with Linux (Ubuntu) my time is ...
2
votes
1answer
951 views

How long does it take NTP to “sync up”

Assuming "sync up" means achieving similar (~1ms) times, how long does it take to: "Sync up" my local computer to an NTP server? "Sync up" my alternate local (networked) computers to one central ...
4
votes
1answer
556 views

NTP daemon or ntpdate doesn't synchronize

I'm having some problems with synchronization with an NTP server. 1) The NTP daemon doesn't sync the system clock at all, even though it's running (confirmed with /etc/init.d/ntp status). Forcing to ...
0
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1answer
220 views

Why ntp settle time too long?

I simply try to set-up NTP to my system. Both server and clients will run on my computer which are linked together with local link. One of them will have the reference clock. Both the server and ...
3
votes
1answer
4k views

Which clients accept DHCP option 42 to configure their NTP servers? [closed]

From what I can tell based on observations of my own OS X 10.8.5 machine, and the information in "Windows clients not using NTP server provided via DHCP," neither OS X nor Windows 7 are able to ...
2
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0answers
96 views

Will a Linux NTP server with an upstream Windows time source have any less jitter?

For my infrastructure we have a platform which cannot synchronize over NTP to a W32time service due to too much jitter from the Windows time source. So my question is, if we have a W32time source ...
5
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1answer
210 views

NTPD: drifts away from system clock

Using RHEL 5.x on a workstation. I set the clock using ntpdate 0.us.pool.ntp.org and then start NTPD using service ntpd start. (this also happens at boot). Watching this over the next 20-30 minutes ...
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3answers
27k views

Updating Time : ntpdate[3108]: the NTP socket is in use, exiting

The time on my system is incorrect for some reason. i need to run an update but i can't seem to be able to this is the errror. ntpdate pool.ntp.org 31 Aug 12:31:59 ntpdate[3108]: the NTP socket is in ...
2
votes
2answers
955 views

Os X - Why do I need to turn on WiFi to determine closest location

Why do I need to turn on WiFi to determine my closest location? For some reason, my mac won't get the latest time from the NTP server if I am plugged into Ethernet. What could possibly be different ...
4
votes
3answers
4k views

How to know current time from internet from command line in Linux?

How to know current time from internet from command line in Linux? For example, with ntpq program? Note: not from computer or operating system clock, but from internet? Note: I don't want to CHANGE ...
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2answers
2k views

Archlinux wrong localtime

Here is datetimectl output, Why local time is not set to Universal time? And I have enable ntpd service. The local time should be Sun 2013-08-11 21:45:21 UTC. Local time: Mon 2013-08-12 ...
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2answers
2k views

How to connect to time server behind corporate firewall/proxy server?

I am setting up an internal web server at big company and we recently changed proxy servers companywide. So time sync won't work. Tried all of the W2008 defaults, tried resetting the time service... ...
0
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1answer
141 views

Serving manually set time

I have set my NTP config to this: # local server server 127.0.0.1 fudge 127.0.0.1 stratum 10 # Only allow read-only access from localhost restrict -4 default kod nomodify notrap nopeer noquery ...
2
votes
1answer
104 views

How to isolate why my system date is going crazy?

The date on my x86 machine is going crazy. When I boot, it's in 1980 (as expected since the CMOS battery is dead). So I NTP sync it with no problems. Some time later (within a few hours, and even ...
1
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1answer
247 views

system clock is 5.5 ahead although ntp

I've checked configs and even installed ntp server, nothing seem to fix this, sudo dpkg-reconfigure tzdata Current default time zone: 'Asia/Tehran' Local time is now: Thu May 9 00:49:38 IRDT ...
3
votes
1answer
9k views

ntpdate[3912]: no server suitable for synchronization found

I've configured ntpd on a CentOs install with a simple /etc/ntp.conf with only 3 lines: server 0.pool.ntp.org server 1.pool.ntp.org server 2.pool.ntp.org server 192.168.1.1 Unfortunately, no matter ...