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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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Can I use one FQDN for all DCs for server authentication and one FQDN for NTP synchronisation?

I'm struggling in regards of a proper practice for server setup for LDAP/AD authentication and NTP. I was thinking if asking two separate questions will be better but I think being a common problem here for two types of services would be a good…
Radosław Serba
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ntp is not using servers from /etc/ntp.conf

on GCP VM I'm trygin to define custom ntp servers but seems like ntp service is not reading /etc/ntp.conf file. I added 4 servers from ntppool.org ntpq -pn constantly return the same result (metadata.google) systemctl status ntp Do you have any…
RedBluff
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GCP Debian VM ntp stuck in INIT

I am trying to get NTP working for a Debian 10 VM client machine in GCP. These are the relevant config lines in /etc/ntp.conf: server metadata.google.internal iburst server 169.254.169.254 iburst # Permit all access over the loopback interface. …
Robert Campbell
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Ubuntu 20.04 refuses to sync time with Windows AD, how to trouble shoot?

I am trying to sync a Ubuntu 20.04 client to a Windows AD time server. But time will never sync. Here is what I know so far: Windows server is listening on port 123 for NTP, and replies to requests. I am using timedatectl. systemd-timesyncd.service…
Dave
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Windows event log shows events in the future

One of my Windows server VMs seems to be time travelling without my permission: Screenshot of Windows Event Viewer The text reads: time service was not able to sync the system time since 1601267 seconds (adds up to the ≈ 18 days it jumps into the…
md7
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How to delete chrony server from client side without restart service

I am trying to setup chrony client server on local and try to add chrony server and delete on the fly I am able to add without needing to restart chrony using this command 'chronyc add server iburst prefer' and i can check chronyc tracking show…
Gaurav Kumar
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How can the local time clock of a server become the NTP time source in a network?

I want to make a the local te clock in a Stratum 1 server be the network time source for my network (I don't want a Stratum 0 server with the antenna). How may I set this up in a network? Is there a tutorial which explains how to use network time…
Baldovín Cadena Mejía
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systemd-timedated.service: Failed to determine whether NTP is enabled: Link has been severed

Encountering this issue with RHEL 7.9 (Maipo). One server in particular is having issues with timedatectl, systemd-timedated.service, and chrony. If we run timedatectl $ timedatectl Failed to query server: Connection timed out Further, if we…
bpaterni
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Custom time zone for Wifi connected devices?

I have Wifi router and server that a number of devices connect to on a ship. The devices are both mobile(iOS, Android) and laptops. Connections are so that the devices can only access a specific website on the server. The location of the devices…
Karlth
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Chrony seems to be synchronized, but kernel keeps unsynchronized flag for the system clock

I have a chrony service (version 3.4-4+deb10u2 - Debian 10) that seems to be running correctly: chronyc tracking Reference ID : A29FC801 (time.cloudflare.com) Stratum : 4 Ref time (UTC) : Mon Sep 12 16:56:00 2022 System time :…
Tombart
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ntp server reject my VMs but the network looks good

Recently there are always several SLES12.5 VMs in my domain got the NTP sync issue. So I made some research on it. Here's the details-- I found 1 VM often raise NTP issues. So I started a monitoring job on it by running "ntpq -pn" each second. …
EisenWang
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Trigger NTP restart after `vagrant resume`

I manage some Debian 11 server VMs using Vagrant. Sometimes I need to vagrant suspend them, and I noticed that after vagrant resume, their system time is off. Running systemctl status ntp shows the NTP service is turned off by a failure. I could…
kol
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Propagate local time over NTP to LAN

I have synchronized my L3 switch to an external time server, this is working correctly. However I'm in Europe and we have CET/CEST switching and I get UTC from the configured time server. I did setup the timezone and the summer-time in my switch…
B3ne
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How to correctly sync time of an Hyper-V host which is member of a domain?

There are many posts concerning issues when dealing with time synchronisation over a domain which holds virtualised PDC Emulators (see this article). As a result our PDC Emulator time (and domain time), although configured to sync from an…
Riccardo
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Windows NTP client not syncing with Linux server

I'm trying to synchronize the time of three computer on a local network. Although having the smallest drift/error possible with the world/internet would be grate, it is not my concert. My main concern is to have the best possible synchronization…
apalomer
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