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Questions tagged [time-synchronization]

257 questions
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Does systemd-timesyncd need to listen to random UDP ports to work properly?

On Debian Jessie servers I see systemd-timesyncd listening on random UDP ports. Which is not the case on Debian Stretch hosts. By random I mean the port it listens to varies from server to server. Does it need to listen to a UDP port to work…
x-yuri
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Why is my internal clock always 1.3 seconds off?

I ran w32tm /stripchart /computer:time.windows.com just for fun and found out that my clock is 1.3 seconds behind this timeserver. Not that I think Microsoft is wrong, but I tried it with various other timeservers in my city just to eliminate…
Grunzwanzling
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Timesyncd with NTP server using md5

I have a FreeBSD server used as an NTP server with md5 as authentication. If I want to connect to it from a FreeBSD/Linux machine which has ntpd, I can simply add something along the lines of server 192.168.1.1 key 10 in /etc/ntp.conf and then…
Michael
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How to configure ntp server and chrony client for time sync over link-local IPv6

I have two computers connected with an Ethernet cable. The first computer, let's call it the "master" is also connected to the Internet via a wireless network. It's running ntp and getting its time from 0.ubuntu.pool.ntp.org, etc. The second…
Spyros Maniatopoulos
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Is there a link between frequent Virtual Server crashes and time synchronization

I am running a 4GB Virtual Server (VMWare) running Tomcat on Windows Server 2012 R2. The server is subject to unexplained restarts every two weeks or so. While searching the event log I filtered on events 6008 and 1, and note that while the time is…
gordon613
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chrony and gpsd: socket or PPS connection

I've try to get high precision time from gps receiver GlobalSat BU-353s4 (/dev/ttyUSB0) through gpsd in Raspberry PI with ArchLinux. /etc/chrony.conf contains: refclock SHM 0 delay 0.5 refid NEMA refclock SHM 1 offset 0.0 delay 0.1 refid…
Stanislav Ivanov
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Where to host NTP server?

nomenclature info: machine - physical on virtual PC server - an application run on a machine to be accessed by clients Hello, we started monitoring delays in requests between our proxy server(NGINX) and our application server(Apache) - each on…
Patrick Kusebauch
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Setting ntp time from gpsd

I'm trying to configure ntpd to source it's time from a gps receiver (BU-353S4) but I'm getting some errors. I'm using ntpd 4.2.8.p6-3 and gpsd 3.16-2 on Arch Linux Arm. I've been following the tutorial on the arch wiki but it doesn't have any…
timlyo
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Does ntpdate work with SNTP?

I have an embedded system with Debian on ARM. I use ntpdate for time synchronization, but I am not sure whether it supports SNTP.
michelemarcon
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Syncing Windows 2012 time to Windows 7

I have one Windows 2012 server and one Windows 7 computer, none of them are running Active Directory. I want the Windows 2012 server to sync its clock with the Windows 7 computer (the Windows 7 computer has correct clock, the Windows 2012 computer…
Solo
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Time Sync Offset on Domain Controllers and Hyper-V Hosts

I have a network with the following: Windows 2003 (PDC Emulator) (in the process of migrating) Windows 2003 DC (same) Windows 2008 Hyper-V Host w/ 5 VMs, one VM is a DC, soon to be the PDC Emulator Windows 2008 Hyper-V Host w/ 2 VMs, remote site,…
user55390
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Time Zone keeps changing after sync with PDC in different site

Background: I have a single domain, running in 2 sites that is connected using Site-to-Site VPN. Site A is running in time zone 2:00+ UTC Site B is running in time zone 4:00+ UTC DCs are correctly placed into their own corespondent subnet in the…
Noor Khaldi
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PTP (or NTP) and Domain Controller clock sync

We need a high precision (1ms) clock synchronization across multiple machines which are part of the domain. The idea is to use a PTP solution. Is it possible to setup a computer which is part of the domain to use a different time synchronization…
Kimi
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How to configure a redundant PTP server

I have a Sonoma GPS time server and a server, which should synchronise itself to the GPS clock, and serve as a fallback option. The time should be synchronised using PTP (Precision-Time-Protocol). This is the current configuration: GPS dedicated…
Michael
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Should the Windows Time (W32Time) service be enabled in an Azure VM?

When connecting to a newly created VM in Azure, there's an alert under Services: When clicking on it, it says the Windows Time (W32Time) service is stopped: Should it remain like that, or should the service be started? I assume it should be…
Stijn
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