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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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firewalld: outgoing NTP connection will be logged as blocked, but isn't blocked

I have configure firewalld on CentOS7 so it blockes all outgoing connections. Only the needed connections are white listed by adding some rules. Also I have add rules to enable logging of blocked connections (outgoing direction). The current…
Steffen
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Cannot change NTP Time Source on a 2012 R2 DC Server

So I have seen dozens of people with this issue on various websites and forums, but here I am asking again. No matter what I try so far, nothing has fixed the issue which I will describe below in as much detail as I can. To start, the server is…
ksrobinson
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Can't put correct date & time on LXC container with ubuntu

I'm tryig to put correct date and time, on Proxmox LXC container with ubuntu but I can't. There are some info of my server. ➜ ~ cat /etc/os-release NAME="Ubuntu" VERSION="20.04.1 LTS (Focal Fossa)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu…
xabikip
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Syncing Linux NTP to Windows 10 NTP

I have two computers. One is running Linux (NI Linux Real-Time), and the other is running Windows 10. The Windows 10 computer has two network interface cards. The 1st NIC is configured so that the Windows 10 computer can directly sync its time with…
bmb
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Windows Active Directory - Change Time Server Settings after PDC/FSMO moved

We have configured a GPO to configure our PDC server like is described here (and many other blogs) https://docs.microsoft.com/en-us/archive/blogs/nepapfe/its-simple-time-configuration-in-active-directory It means that our GPO uses the filter that…
Uh Trog
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Do NTP pool servers use gpsd?

A bug in gpsd upon which some NTP servers rely, has been known for a couple of months, but it hasn't really become general knowledge until recently, just before the October 24, 2021 rollover that may set some NTP servers' clocks back to 2002. A…
Spencer
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Using AD server as NTP server for non-windows hosts (rhel hosts). ntpstat continues to state unsynchronized but ntpdate works. Is this possible?

We currently have an AD server that we are using as a time source. Our AD server is setup to host time locally and the windows domain clients sync up to this machine fine. We have the firewall disabled entirely on the hosts and there are no…
IT_User
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Domain clients not seeing standalone DC as time source

I've got a Server 2019 DC (standalone/solo), running on physical hardware, which is configured and presenting as a reliable time source (TIMESRV and GTIMESRV flags are set), but all domain clients are not syncing with it. These are set to NT5DS and…
Cian
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Dell Compellent clock skew too great

I received this alert from our Dell Compellent SC200: " Alert created on controller '12345' for object [internal ref: 'Global '] - [ProgressionTime]: Some Data Progression features, such as RAID Rebalance, may not run properly because the…
TLMstack
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ntpd does not sync clock if it gets internet connection little late

In our production box, I am a facing a problem with ntpd. I am enabling the NTP feature for our production box and observing one isssue. We start the ntpd daemon in the initialization process of our box. During that time internet connection is not…
vivek
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ntpd -g does not sync the clock

From ntpd man page If time is more than 1000s from the server time, ntpd assumes something must be terribly wrong and the only reliable action is for the operator to intervene and set the clock by hand. This causes ntpd to exit with a panic message…
vivek
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Which server will ntpd daemon prefer for time synchronization if we have multiple servers in ntp.conf file

I read that ntp uses all the servers for time synchronization. It got me one question. Suppose I am having multiple servers in the ntp.conf file and time gap is also more than 1 day. I have not specified prefer keyword also in the ntp.conf…
vivek
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Centos ntpd can't sync

I have a Centos 5(I know that Centos5 is very very old) virtual machine that is refusing to sync. My virtual machine host is Windows 10 with HyperV and is syncing without problems. Things that I have tried: Restart the vm. Disable the vm…
Javier Cintrón
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libfaketime, the file /etc/faketimerc doesn't change the ouput of the date command

I am using the librarie "libfaketime" to fake the time of my system. My objective is to change the time inside a docker container, independently of the host time. It can allow me to transform the container as a ntp server, distributing the fake time…
molik
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ntpd synchronization not working

I'm running latest Raspbian Lite on Raspberry Pi 3 B. Just reinstalled ntpd completely and it doesn't synchronize time with upstream NTP servers at all. ntpdate -u 0.debian.pool.ntp.org works just fine. Using tcpdump (for eth0 interface) I can see…
sq8l
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