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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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Disable NTP server providing time sync to anonymous clients on the Internet

Have set up a Linux server (Debian 8.7) and is wondering how I prohibit anonymous clients on the Internet to use my server for time sync? Server has default ntp config - haven't touched anything yet. Is it enough just to block port 123 udp incoming…
TheStoryCoder
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ntpdate, ntpd can update time from time.google.com but the ntpd service fails

I'm trying to synchronise my Ubuntu 12.04.5 instance with the Google timeservers at time{1,4}.google.com and I can successfully query using both ntpdate and ntpd but once I start ntp as a service it fails to contact the time servers. Not sure why…
WheresWardy
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NTP server permission denied when trying to read key file

I'm trying to set up an NTP timeserver for hosts on my internal network to synchronise against. I need to use authorisation in order to comply with PCI standards. I've created a set of keys using ntp-keygen -M and added the below snippet to my…
Andy
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How do I set the ntp server of an AWS RDS instance?

This question is in the context of AWS RDS managed databases. I have an AWS RDS PostgreSQL instance running and I would like it's clock synced to a specific ntp server. How can I do that?
Gudmundur Orn
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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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How to set up NTP (not SNTP) on a Windows box?

I have a network that is running on Brocade layer 3 switches. I need these switches to be synced with NTP. The computer that I need to use is running Windows 7 and has services such as Win32time that use SNTP but no native NTP support. So far I…
mando222
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Configuring NTP server on a virtual machine and have it point to the physical machine

I have a virtual machine running on a physical machine, both using RHEL 7/CentOS 7. I need to configure the virtual machine to serve as an NTP Server and have this NTP server point to the physical machine. Both the machines have chronyd installed by…
Dave
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What is Best Practices for time management in RHEL/CentOS 7 in VMware?

NTP, CHRONY, OPEN-vm-tools... Best Practices for time management in RHEL/CentOS 7? Hello. I am (finally) working on creating a CentOS 7 VMware (ESXi) Template - currently ESXi/vCenter 5.5+. Past usage of time management within a guest has varied and…
Charlie O
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VMware 5.5 Host Not Updating Time From NTP

I have 2 HP ProLiant VMware 5.5 hosts and I have configured the time sync on them to use NTP. I have pointed the NTP to the n.north-america.pool.ntp.org servers. I have restarted the time service and waited 15 minutes but the time is still out by…
Caynadian
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Where can I see ntpd working status (log or message)

In my server the ntpd service is started but it does not seem to work. I can find nothing according to this ( Where are the ntpd log file located, and how can we configure the ntpd log file path? ) and this ( Where can I look up for the ntpd log? )…
auntyellow
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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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NTP synchronized clock alongside the system clock

Does NTP daemon(ntpd) provide some sort of virtual clock that it disciplines and serves, but not touch the system clock? Goal: On a realtime Linux OS, have a NTP synchronized clock alongside of the system clock, so that ntp time changes won't cause…
Vikyboss
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Correcting Time Problems - Cisco Switch - DHCP Options Daylight Savings Time

I inherited quite a network in terms of centralized or correct configuration. The prior administrators did not configure many basic services correctly and myself and my Senior Administrator are now being hammered with several problems they left…
Nick Young
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Wrong hardware time on linux

I don't have the correct hardware time on my debian server: root@server[09:48]:date Tue Dec 22 09:48:52 EST 2015 root@server[09:48]:date -u Tue Dec 22 14:48:54 UTC 2015 root@server[09:48]:cat /etc/timezone Europe/Paris root@server[09:48]:hwclock…
mathieu
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NTP server time drifting

We currently do not have NTP (Network Time Protocol) appliance in our environment. So we are using one of server as NTP master server and remaining servers are synced with this using NTP port. Is there any low cost option other than using NTP…
kiran
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