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Questions tagged [ntp]

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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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: NtpClient was unable to set a manual peer to use…
Abel
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Using NTP to sync a group of linux servers to a common time source

I have 20 or so linux servers and I want to sync all of their clocks to a single NTP server, which is in the same rack and switch as my servers. Nothing is virtualized. Our admins are having trouble getting the clocks on the various machines synced…
Ted Graham
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Securing NTP: which method to use?

Can someone good at NTP configuration please share which method is the best/easiest to implement a secure, tamper-proof version of NTP? Here are some difficulties... I don't have the luxury of having my own stratum 0 time source, so must rely on…
Harry
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Using GPS as only source for NTP daemon

I have questions regarding the use of a GPS receiver as an external clock source for realization of a time server with NTP daemon (client version 3), on a local network with no connection to external time servers. I tried using three different GPS…
waldemar
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Why is NTP considering my server inadequate?

I have an embedded Linux device connected directly to my Windows desktop via a USB/Net interface. It's based on the Freescale iMX6 boards so I believe the clock hardware is the SNVS RTC. On the desktop 192.0.0.10, I have W32Time running as an NTP…
user12022
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Chrony time synchronization on huge time diff

hello currently i have a localy ntp server (chrony) and a ntp client (chrony), all are working but when i try to change ntp server time to say minus 6 years from current time. ntp client cannot sync with it, it will just say on syslog: Jan 9…
lemoncodes
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Allow Active Directory users to disable datetime sync

I have recently migrated my company to Active Directory. With it comes a default setting that will force time synchronization to be enabled. Trouble is, some users need to change their datetime settings for testing purposes, but automatic sync will…
Nathan.Eilisha Shiraini
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Different offset in "ntpq -p" and "ntpdate -q"

I'm sometimes notified by our system monitoring about too high offsets in ntpd. When issuing ntpdate, it shows none. As ntpd adjusts time slowly, it seems to "think" there is an offset which needs to be adapted. But shouldn't ntpdate show this…
Christian
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Is it possible to increase the rate at which ntpd updates the system clock?

We have some hosts that have gotten out of sync due to ntpd being mis-configured, with an ntp server that was unreachable. Our clocks on some hosts (CentOS 6) are now upwards of 30 seconds off (in the future it seems, for most of these). It looks…
MrDuk
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Public NTP servers

Is there a list of public NTP servers on the internet I can use.
Alan H
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Time synchronization in an heterogeneous environment

In a mixed environment, where machines can be running under Windows (most), Linux (a few), sometimes Android ... what is the best solution to have time synchronization with an accuracy close to milliseconds? We are developing a microservices based…
David Brabant
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NTP running, server time is wrong on VM

The server time was 7 hours off (instead of 10AM it was 3AM, even though date showed the correct timezone). The output for ntpq was: $ ntpq -p remote refid st t when poll reach delay offset …
sina
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Tracing chain of NTP servers

For educational purposes I wanted to trace a chain of NTP servers, e.g. 0.de.pool.ntp.org back to a stratum 1 NTP server. How can I do this? I found ntptrace, but it doesn't work: /home/xyzdragon# ntptrace localhost: stratum 2, offset -0.009285,…
mxmlnkn
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Problem synchronizing server time with ntpd

I am trying to ntp sync one machine with another. both runs Debian lenny, and I installed the ntp package in both. I configured the server to synchronize with an external machine by putting server IP.ADDRESS iburst in it's /etc/ntp.conf file. I…
Omry
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What happens when DC cannot reach external time server?

We have a small Windows 2012 R2 domain with a single DC. The DC is advertising as a time server, and the clients are syncing just fine. The DC is getting its time from an external time server, and all is well. However, what happens in the case of…
teleute00
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