Questions tagged [ntpd]
The Network Time Protocol daemon (NTPd) is a daemon program that synchronizes the system time with time servers using the Network Time Protocol (NTP).
244 questions
0
votes
0
answers
76
views
NTPd stopped working
I found a strange behaviour by NTP synchronization.
That NTP server worked fine until now when some clients reported a wrong date/time set to today but in year 2000.
After investigation I found the ...
1
vote
1
answer
320
views
Why is my NTP servers' stratum not changing to 16 after long time in ntpq output in Ntpsec
I am running ntpsec on a Linux host and configured it to synchronize with a specific NTP server.
My /etc/ntpsec/ntp.conf has an entry like:
server <ip> burst iburst minpoll 6 maxpoll 10
When I ...
- 19
1
vote
0
answers
61
views
Calibrating a local reference clock in ntpd
(This is an advanced topic)
I have a DCF-77 reference clock connected via a serial cable to a PC running ntpd using Linux.
One of the peers is a local NTP server using a local GPS clock.
In addition I ...
- 576
0
votes
1
answer
213
views
what could be the reason of the NTP "when" increasing over "poll"?
I have a NTP server with a "poll" time of 1024. Frequently the "when" time exceeds the poll time. As I understand it, when shows the time since the last poll and the poll time ...
- 234
0
votes
0
answers
969
views
NTP Sync between Windows and Ubuntu
I'm configuring time synchronization between a Windows PC and an Ubuntu NTP server for a long time now and I wanted to ask for some help. Here's my setup and what I've tried so far:
Setup:
Ubuntu PC:
...
- 1
-1
votes
1
answer
153
views
Time synchronization between Ubuntu (America/New_York) and Windows (SGT) using w32tm
I'm trying to synchronize time between an Ubuntu server and a Windows PC (set to Singapore Time, SGT) using the Windows Time service. Here's my setup:
Ubuntu server: Running as NTP server (set to ...
- 1
0
votes
1
answer
369
views
NTP servers and DNS ordering
I have a main network with three main servers (call them A, B, and C). They are all routers, 3 of 4 of my (serving) NTP servers, and 2 of 5 of my DNS servers. The DNS servers (bind9) are all ...
- 150
0
votes
2
answers
578
views
How to synchronize time between two devices on a local network using NTPD, with one device serving as both client and server on separate interfaces?
I am using STM32MP1 based two devices which runs on Yocto Linux platform. Among them one has two network interfaces (wlan0, wlan1) where wlan0 is used for connecting with internet servers & wlan1 ...
user1074060
0
votes
1
answer
676
views
ntpdate works but ntpd servers stuck at .INIT
There have been several similar questions to this, but none with resolutions.
I can run ntpdate on the machine, and the date is updated. I assume that this means there is no firewall problem.
I have ...
- 123
1
vote
0
answers
644
views
NTP client synchronizes with LOCAL instead of stratum 1
I have 2 NTP servers. One synchronized directly with a GPS clock (I will call this server 185), so st 0.
Then I have a second one (Let's call it 186) that should synchronize with the 185 since it is ...
- 11
1
vote
1
answer
1k
views
How to test whether NTP server is secured or not
We are trying few of the configurations of NTP in ntp.conf file and want to be sure whether the NTP server is secured or not.
Following the recommendation provided here:
https://support.ntp.org/...
- 25
0
votes
1
answer
250
views
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 ...
- 261
0
votes
1
answer
5k
views
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 ...
- 1
0
votes
1
answer
3k
views
Linux guest on Hyper-V host, realtime clock, UTC or local - sync with AD DC
I'm installing a Debian 11 Linux guest on a Hyper-V cluster. Hosts' realtime clocks are set to local time, as is the norm for Windows Servers; unlike the preference of Unix-like OSes. Should I execute ...
- 1,645
2
votes
2
answers
23k
views
NTP/Chrony not keeping time synchronized on CentOS 7.9 (VM running on VMware ESXi)
I have 3 servers running CentOS 7.9.2009 in a data center (VMware ESXi). These servers report that the time is not synchronized. I have a similar test environment running on an inhouse VMware ESXi ...
- 233