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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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How can I know which client is referring ntp server?

I'm on process to migrate ntp server to another server. I already setup the ntp server on the new PC, reconfigure clients for the new server, but want to know nobody refers the older ntp server before shutting down the older ntp server. But as long…
Jose
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Time Drift on VM servers, need a reliable solution

We have some windows server 2008 VMware instances on multiple physical servers (hosted) and an application which requires the time to be synced across the server instances. Obviously, VMware has problems with this and we really have never gotten it…
zeroasterisk
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Network Time is being set by "something"

Something is setting (the incorrect) time on our network- though I don't know what it is (since we have approx 40 servers). We run on a windows network, with AD etc. Not sure where to even begin to start looking- as far as I know, we don't run an…
AliGibbs
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Time difference between NTP servers

I have a unique offline LAN. It contains two servers that get time from the same source. They do not reach out to the internet for their time source. They receive time from an application layer. I trust their time. I have a client that should sync…
RyBoneCoder
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NTP Server Precedence using systemd-timesyncd

I'm looking for documentation which specifies the precedence / priority of NTP servers (ubuntu 20.04). I am using timesyncd which has the ntp.ubuntu server But when connecting to the network via DHCP I want to use the NTP sever which my DHCP server…
Jake Baker
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how to verify the setting of linux ntp client?

I'm currently managing some RHEL 7.9 hosts which need to sync time to NTP server and only the ntpd can be utilized for time sync. I did the following configurations in OS but not sure whether the result indicting they're correct or not. the time…
user53815
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What is changing my Windows Server's date?

At my organisation we have a number of virtual machines on ESXi hosts in a number of sites. For the past few months, around once or twice a week one virtual machine, seemingly at random, will update the date to something weeks in the future for a…
Mayzed
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NTP Traffic, but NTP not installed

I have recently started with OPNSense and have limited outgoing traffic to HTTP/s, SSH ports. When analyzing my blocked traffic i found sporadic outgoing NTP-Requests from my local Linux machine. I am not very familiar with NTP. I am now wondering a…
BillGatesPriv
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how to check whether the system time is synchronised to NTP server without knowing the ntp client used in the product?

how to check whether the system time is synchronized to NTP server without knowing the NTP client used in the product? I'm developing an application that is expected to run in both containers or standalone systems. My application has a requirement…
Baranikumar Venkatesan
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CentOS 8 NTP: Chrony will not Sync with sources, timedatectl showing no sync but NTP active

I have been battling with Chrony for the last few hours and cannot seem to figure out what I'm doing wrong. I found that my system time was set to 2015 when trying to activate Epel-release in DNF, some certificate errors lead me to trying to resolve…
Ryan Smith
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ntpd: permission denied writing to /var/log/ntpstats/ (statsdir directory)

I am running a NTP server on an Ubuntu 20.04 LTS. The server work fine and the client poll correctly the server. But i keep getting a permission error when i want to record statistics. I tried to include the following lines in ntp.conf : statistics…
molik
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Chrony stepping instead of slewing clock

I have a bunch of RHEL 6.8 - 7.4 Azure VMs for which the system clocks are out of sync (up to 300s slow). I'm installing Chrony on them but rather than slewing the clock to the correct time it is stepping it. I have commented out the makestep…
user2399020
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Receiving a lot of NTP requests

On my server I see a lot of NTP requests. All NTP traffic is blocked by iptables. Is there anything more I could do to stop this traffic? 28M 1019M DROP udp -- * * 0.0.0.0/0 0.0.0.0/0 udp dpt:123 The requests…
Rob Hassing
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Windows 2019 server NTP increases memory utilisation by acquiring page table

We started with a brand new windows server 2019 datacenter edition and installed an infrastructure monitoring agent on it and strictly no other program. The machine had 8 GB of memory. As part of monitoring NTP offset from sync'd host we scheduled…
Akash Pandey
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NTP - Disable timesyncd and enable NTP

I have installed ntp on ubuntu 16.04 but when I run timedatectl it doesn't show NTP. It shows systemd-timesyncd in the output. I ran the command sudo systemctl disable systemd-timesyncd; sudo systemctl stop systemd-timesyncd; sudo systemctl enable…
John doe
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