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

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Syncing to a Cell Phone Companies NTP Server [closed]

Not strictly for authentication, I am looking for a way force my Ubuntu NTP Server to use my cell phone companies network time as a basis for all my in home time. I cannot seem to find the address ...
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2answers
33 views

NTP System time different from hardware time

on a centos 6.5 server I've just executed ntp with: service ntpd start It has fixed system time, but hardware time is still wrong. Is this normal? How can i fix it? ntpstat reports: ...
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1answer
77 views

NTP doesnt sync my time

Im getting problems to sync my local time with the NTP Server. this is the output when u do a NTP Query. remote refid st t when poll reach delay offset jitter ...
-1
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1answer
24 views

Relativistic NTP

I was wondering whether any provision is made in the NTP standard to synchronize time between machines travelling near the speed of light relative to each other. Does NTP even work in these ...
0
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2answers
61 views

NTP - ntpq -c peers showing incorrect stratum for peers

I am running Ubuntu 14.04 as an Amazon Web Services instance. When I run ntpq -c peers on my server I get the following output: # ntpq -c peers remote refid st t when poll reach ...
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0answers
21 views

How to correct the source of time difference between two different server using the same NTP server?

It is observed that there are times when the servers are having time differences as much as 61 seconds. Other times, the servers time are in sync. Please advise on how can these discrepancies can be ...
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0answers
26 views

I think Nod32 is blocking sync with all time servers

Today I have a strange problem for you all. On desktop I am using Nod32 antivirus 8 and cannot sync with any internet time server. Tried all w32tm settings but it is always stuck in Please wait... ...
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0answers
19 views

Using ntp across LAN

I have 3 debian computers connected to a network switch across LAN without WAN access. I would like to manually set the date and time on one of the computers, then automatically sync the time to the ...
1
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1answer
57 views

Syncing computer to internal server time

I'm trying to sync my PC time with an internal server but I'm not sure if it's working. I've added the internal server to NTP.conf as below: colin@colin:~$ sudo geany /etc/ntp.conf server ...
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1answer
403 views

How do I interpret w32tm output, especially d:?

I am trying to understand what all the different values mean in the following output. I understand the command below is comparing my local time ("current time is") with time.nist.gov 8:38:08 is my ...
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4answers
3k views

Windows vs Linux Local Time?

Ever since I started using Linux in dualboot with Windows I noticed that when I rebooted the machine, the time on the other OS was wrong, e.g. it was 12:00 on Linux, then I rebooted and on Windows it ...
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0answers
53 views

How to verify that the NTP server is working on a test machine

I have built a local production network that will use a corporate network for user access control. The domain controller will act as a NTP server as well. The devices that will connect to the domain ...
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1answer
139 views

NTP Stratum Inaccuracy [closed]

We're gearing up to have an argument regarding NTP stratum as an indicator of time accuracy. The statement that started the whole thing was: Stratum 5 can be four minutes off. My understanding ...
0
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1answer
37 views

Linux ntpd service does not appear to be working

I’m running this flavor of Linux on identical machines … [dalvarado@machine2 ~]$ uname -a Linux mydomain.org 3.10.32-35.201.amzn1.x86_64 #1 SMP Thu Aug 14 22:00:02 UTC 2014 x86_64 x86_64 x86_64 ...
1
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1answer
398 views

How to add a compiled ntpd in services on linux?

I compiled and installed ntp-4.2.8 using this link and created a rpm by running checkinstall on RHEL 6.5. I used the command ntpd -l logs to manually start ntpd. After starting I am able to verify ...
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1answer
206 views

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 ...
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0answers
27 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
164 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
27 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
296 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
66 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
1k 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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0answers
34 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
50 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
291 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 ...
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1answer
633 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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2answers
445 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 ...
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1answer
274 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
95 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
81 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
281 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
67 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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1answer
4k 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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0answers
120 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" # # ...
0
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1answer
2k 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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0answers
139 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 ...
48
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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
142 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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745 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
174 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 ...
1
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1answer
3k 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
222 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
216 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
vote
2answers
963 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 ...
0
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1answer
1k 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
419 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
4k 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
144 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
1k 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
2k 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 ...