NTP stands for Network Time Protocol, and it is an Internet protocol used to synchronize the clocks of computers to some time reference.
Questions tagged [ntp]
717 questions
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NTP can't synchronise or find a suitable server
The problem I'm trying to solve is that NTP won't synchronize:
$ sudo ntpstat
unsynchronised
time server re-starting
polling server every 64 s
Edit: Here's some ntpq output:
$ sudo ntpq -c peers
remote refid st t when poll…

Leo
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Blocking ntp client from listening
I have been trying to build and configure ntp clients and server, and used this line in the ntp.conf for the clients:
restrict default ignore
Still, I see that my client is listening on the local network interface. From the system log:
Listening…

Adam Matan
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2 answers
Setup of NTP on Hyper-V servers
I am having problems with NTP setup on our Hyper-V host and clients. I am not using Domain Controller (almost all advise is given for DC's which I am not using).
On all servers I have used the windows clock to setup the ntp client name (Right click,…

galmok
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ntp offset is growing after some time
I have 10 clients and one server syncing with 2 NTP servers on windows using Meinberg NTP, all of them running Windows XP SP3. Except the server all of them syncing their time perfectly. The one that is losing its sync is running SQL server 2008,…

Majid Azimi
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NTP syncs with local timeserver but not NTP pool servers
I setup an NTP server on a machine in another subnet and tried to ync my machine with the server and it works well. But when I try to ust the pool.ntp.org servers (I tried 0.pool.ntp.org, 1.pool.ntp.org, etc. and just pool.ntp.org servers), it does…

Arpith
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Time jumps on guest system really shortly
I've got a ESXI-Server and a OpenSuse 10.3 distribution running on it as a guest system. In a java (6_17) application that uses Thread.sleep() to not hog 100% CPU, I noticed that it sometimes never wakes up again, and the application is in a coma. I…

Franz Kafka
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ntpd doesn't seem to sync at all
I am following this tutorial
It's 2008, so I am very careful using its advice. I need to make this machine the master, and let all other machines use it to sync the time. They are all out of sync by 20-30s...
By default the conf file has this:
#…

CppLearner
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Windows 7 as NTP Time Server
Trying to get Windows 7 box to act as an NTP Time Server for linux clients
From here:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\
In the right pane, right-click AnnounceFlags, and then click Modify.
In the Edit DWORD…

Dave Mateer
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NTP not updating the server time in CentOS
I compiled ntp for arm
My NTP client is not updating the time from any of the server
I referred to the post "Why is ntpd not updating the time on my server? (7)"
But nothing works out..
Here is the output of ntpq -pn
[Tue May 15 13:18:26…

Orion
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How often does asymmetric latency actually happen?
I was reading through the Wikipedia entry on NTP, and noticed this:
The NTP synchronization is correct when both the incoming and outgoing routes between the client and the server have symmetrical nominal delay. If the routes do not have a common…

Curtis
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Should I timesync against PDC Emulator or NTP timesource? (PDC not in hub)
I know the best practice would be to have the PDC Emulator to sync against an external NTP time source, and have all other domain controllers sync against the PDC Emulator.
However, my network layout is... 'interesting', to say the least.
My company…

pepoluan
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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 will only get its time from the local system which is…

AtomicPorkchop
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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 have to keep resetting the system date/time back to…

Dai
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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, 1.pool.ntp.org, 2.pool.ntp.org"
w32tm /config…

Barry Brown
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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 configured it as follows:
listen on 192.168.0.1
server…

Etienne Dechamps
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