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

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NFS fileserver / computer clock not in sync despite NTP setup

I have a fileserver running at home (Synology DS214se) which, among other things, serves my /home/<user> (per pam_mount controlled NFS). This works just fine for all practical purposes, with ...
0
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1answer
17 views

NTP sync issue on client servers

Does starting up NTPD daemon will automatically sync the client server with NTP server? Our server is running 5 mins behind the current time when we checked the service was in stopped state so does ...
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0answers
10 views

Should I remove ntpdate?

I noticed that ntpdate is installed on my CentOS 6. I heard that it is deprecated so should I remove it from my system and will ntpd do the work instead ? Thanks.
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0answers
14 views

W32Time not synchronizing with PDC after /syncfromflags:domhier

We have two domain controllers on a local network: Zeus [PDC] Neptune Zeus is configured to pull from an external time source and is set as reliable: w32tm /config /manualpeerlist:0.pool.ntp.org ...
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0answers
18 views

How to use adjtimex

I have a Debian machine that at the time of configuration will have access to NTP servers. But once configured and in use, it will not have access to NTP servers. What are the steps to ensure that the ...
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1answer
96 views

Windows 10 keeps failing to connect to online NTP server

I would like to keep my time up to date using an online NTP server. pool.ntp.org seems to work for other devices on the network, so that's the NTP server I want to use. When I update the NTP server ...
1
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0answers
10 views

systemd-timesyncd: Show NTP status

When using systemd-timesyncd, how do you show more detailed NTP status? Specifically, I'm looking for the IP addresses of the peers I'm using (presumably aquired via DHCP). This does not show what ...
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0answers
10 views

NTP not getting through even to DMZ

My home router seems to be blocking UDP 123. sudo ntpdate -u time.apple.com works as expected, but sudo ntpdate time.apple.com I get: "no server suitable for synchronization found" I can get a ...
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1answer
31 views

NTP - fix massive offset

I've got a RHEL 5.4 and I'm synced to my NTP server .... I have managed to reduce the jitter to almost 0 with ntpq -q But then it came right back. The huge offset remains regardless of what I do. ...
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1answer
40 views

Will NTP peering help my servers' relative drift?

I have a series of internal NTP servers; every other machine on my network is configured to talk to these servers like so: # ntp.conf for client machines server 0.ntp.internal iburst server ...
1
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2answers
41 views

Can Debian detect the timezone automatically from the network?

So on debian I can change the timezone by running # dpkg-reconfigure tzdata Is there a way to have it recognise this automatically (say if I travel to a different timezone and connect to a wifi ...
0
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1answer
29 views

How do I query a Domain Controlers NTP service from a linux box?

I need to confirm that a Domain Controller is acting as a NTP time server for non windows devices and servers. I figure there must be a command in linux that will query an NTP server and see if it is ...
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1answer
523 views

'net ads join -U username' failing with an error 'NT_STATUS_IO_TIMEOUT'

I am attempting to provide access to Ubuntu shared directories using Active Directory users and group using Samba. I am following this article to install and configure AD and Unix so that access can ...
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1answer
84 views

NTP not syncing immediately on windows

I am trying to sync with NTP server, but server is responding with below messages. Below are the wireshark captures. Flags: 0x0c 11.. .... = Leap Indicator: unknown (clock unsynchronized) (3) ..00 ...
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2answers
54 views

how to verify firewall rule for a particular service?

How could i check which firewall rules are used by a particular service and whether port is blocked to restrict access by external users? i.e netstat -tulnp | grep 123 udp 0 0 ...
5
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1answer
7k views

Where do I find the “Internet Time” (NTP) settings in Windows 10?

In Windows 7, you could get to the "Internet Time" settings by following the instructions in this Super User answer. Now, I can get to this interface, but there is no option to set a custom NTP ...
2
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1answer
76 views

DNS and NTP on same box?

I'm using DNS to hold forward zone records for my domain (example.com) and I'd like to add ntp as well so my servers can sync the time and reduce load off of third-party ntp pool. I understand it's ...
0
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1answer
241 views

systemd-timesyncd.service start fails

I try to start systemd-timesyncd.service service but it fails: root@xxxx:~# systemctl start systemd-timesyncd.service root@xxxx:~# systemctl status systemd-timesyncd.service ● ...
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1answer
84 views

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
115 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
318 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 ...
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1answer
32 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 ...
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2answers
701 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
37 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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42 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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1answer
27 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 ...
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1answer
94 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
2k 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 ...
29
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4answers
4k 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 ...
1
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1answer
462 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 ...
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1answer
51 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 ...
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1answer
1k 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
394 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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1answer
365 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
36 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
700 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
106 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 ...
2
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2answers
3k 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
70 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 ...
0
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1answer
478 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
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1answer
1k 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
697 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
436 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 ...
0
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1answer
119 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 ...
2
votes
0answers
419 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
114 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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2answers
9k 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
144 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
3k 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
186 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 ...