1
vote
0answers
94 views

ntp is not syncing on centos server but gets response from remote server

I have googled for days before asking and I feel like I have tried everything but ntp is still not updating the time of the system automatically. I have left it running for days and still I get the ...
0
votes
0answers
33 views

How can I select ntp the time source for a system?

I have two Windows 2008 servers running Meinburg NTP. When I run ntpq.exe -p from one, I see that there are sources specified as current, selected, or discarded (via a +, -, or *). On another system, ...
0
votes
2answers
98 views

Both my ntp servers are marked as falsetickers in the status [closed]

I have a linux box, set up with two ntp servers to sync. This box in case, was extremely out of sync (61 seconds) before it was forced sync. The following outputs are 1 hour after this sync. When ...
1
vote
0answers
66 views

ntpd -gq do not working on CentOS 6.4

when I'm running 'ntpd -gq' from CentOS 5.10 (i686) the time is synced, but in CentOS 6.4 (x86_64) the command gets stuck (I need to stop it using ctl+c). Any idea hoe to fix it? EDIT: iptables ...
1
vote
0answers
50 views

ntpd default rate limiting?

I've got about 70 linux instances running on an OpenStack cluster that currently consists of two compute nodes and one controller. Also, these machines live in a RackSpace DC as part of their 'Private ...
2
votes
2answers
84 views

Why does ntpd need to bind external interfaces to sync the local clock?

I wanted to tighten my security so I don't want to open any ports that are not really needed. I have no intentions of running an ntp server for other people to use, I only run the ntp daemon to keep ...
0
votes
0answers
237 views

Ubuntu 12.04 LTS ntp not working

I'm having major woes trying to get ntp working on several ubuntu 12.04 servers. Note this is NTP to keep the time set on those servers. Not to distribute the time! I've installed several of those ...
1
vote
0answers
26 views

ntp.conf function and format for server keyword

I have 4 redhat boxes that are each sync'ed by their own arbiter gps clock. These are acting as time sources for the rest of my network. Can I include all four boxes in the peer statements in ...
1
vote
0answers
390 views

Linux - NTP stopped working after recent update

A few days ago I had ntp setup on my network, and everything was running fine. One node was set to sync with upstream servers, and the rest of the nodes from the one set to sync upstream. Yesterday I ...
10
votes
2answers
172 views

why doesn't ntp recover after an Internet-less startup?

I have a few Linux devices (without TOY chips, so they completely rely on ntp) which may boot without access to Internet (the link to the switch is up). The ntp service will start but obviously no ...
0
votes
1answer
85 views

Gentoo server time issue, can't manually set time, NTPD won't correct, too big of a time difference

So, my server is living in the future, unfortunately I can't get lottery numbers, or stock picks out of it. It thinks this is the time: Thu Nov 7 04:07:18 EST 2013 Not correct, I tried to set the ...
0
votes
1answer
136 views

NTP synchronisation not visible in syslog

I am trying to set up a local NTP server for our LAN. I am able run ntpdate server_ip to manually update the time. However, ntp daemon does not seem to be logging anything into syslog, and so I can't ...
6
votes
3answers
192 views

How to make NTP work despite a high offset?

Recently I have kickstarted some servers that had their time off by a month in the bios. The time in the bios said it was a random time/date in May, while it was June. This caused NTP not to work, ...
1
vote
2answers
903 views

enable/disable ntp service on ubuntu 12.04

Our application runs on Ubuntu 12.04 Precise. On this server, we have both ntpdate and ntp. How to enable and disable the NTP service on-demand? I tried # sudo update-rc.d -f ntp remove/default ...
2
votes
1answer
166 views

NTP synchronization stays with no reach

Usually, when a machine looses connection completely, ntpd misses a couple polls and marks all sources as failed sanity. Which seems quite logical. But I've met a situation when a server stays marked ...
2
votes
3answers
255 views

CentOS VM, NTP synchronization problems

We have three CentOS 5.9 VMs on an ESX3.5 host. Because of the nature of the services we provide it is required that the NTP time is synchronized and the time is correct on all three of them. ...
2
votes
2answers
226 views

using NTP protocol for internal time synchronisation

I have two embedded system that are connected via ethernet. I want them to run synchronously. Using NTP protocol is an option to synchronize them. But this is a isolated system. I don't have an ...
1
vote
2answers
203 views

Ntpd excessively inaccurate

I have ntpd set up (Meinberg ntp-4.2.6p5@london version for Windows on a Windows 7 client) with a bunch of nearby servers selected for low ping times (usually 10-20ms ping). However it seems my clock ...
6
votes
3answers
5k views

Why is NTP syncing to LOCAL rather than remote server?

So, I'm trying to debug my current NTP setup, and found that he offset from my single configured server is over 3 seconds, and not adjusting. The asterisk on the LOCAL(0) in the ntpq output seems to ...
12
votes
2answers
2k views

Why does ntpd listen on so many ports/addresses?

I’ve noticed this for a while, and it’s never made any sense to me: Why does ntpd need to listen on so many addresses? For example, a Debian machine: $ netstat Proto Local Address Foreign Address ...
8
votes
2answers
4k views

ntpdate and ntpd failing to sync clock on Linux

I have a strange problem with one of my servers. ntpd and ntpdate fail to work, but debugging shows no errors at all. At first I thought maybe a local or network firewall was blocking UDP port 123, ...
0
votes
1answer
97 views

Need one time server clock sync for latency test, what should i use ntdate or ntpd

All machines are Ubuntu I need to sync clock one time for all machine in order to do a latency test. I read this article that said - ntpdate is a bit of a blunt instrument - it can only adjust ...
2
votes
4answers
4k views

ntpdate works, but ntpd can't synchronize

This is in RHEL 5.5. First, ntpdate to the remote host works: $ ntpdate XXX.YYY.4.21 24 Oct 16:01:17 ntpdate[5276]: adjust time server XXX.YYY.4.21 offset 0.027291 sec Second, here are the server ...
2
votes
2answers
312 views

Is there any way to make ntpd to iteratively consult the server addresses given in the ntp.conf file?

Suppose the machine has an ntp.conf file that looks like this: driftfile <path-to-drift-file> server <NTP-server-1> server <NTP-server-2> server <NTP-server-2> For some reason, let ...
1
vote
1answer
1k views

ntpd doesn't seem to sync at all

I am following this tutorial It's 2008, so I am very careful using its advice. I need to make this machine the master, and let all other machines use it to sync the time. They are all out of sync by ...
1
vote
1answer
252 views

does NTP minpoll-maxpoll control sync intervals?

Do the NTP minpoll and maxpoll configuration attributes control the sync interval or do they only control the polling interval? where: polling = messaging with NTP servers to estimate the offset ...
5
votes
1answer
607 views

How well will ntpd work when the latency is highly variable?

I have an application where we are using some non-standard networking equipment (cannot be changed) that goes into a dormant state between traffic bursts. The network latency is very high for the ...
1
vote
1answer
134 views

Use ntpd to log time adjustments rather than set system clock

Is it possible to use ntpd to log all time resets and adjustments rather than set system clock?
0
votes
3answers
7k views

How to configure ntpd to sync time more frequently?

I need to set ntpd to sync time as often as possible, how to do that? UPD I need to make ntpd adjust system clock more frequently, not poll servers. It's necessary because system clock of my virtual ...
1
vote
2answers
7k views

NTP configuration not recognized?

I'm trying to configure NTP on my machine but it seems that the parameters I set are not being read by the system. Below is my /etc/ntp.conf file. (I applied the most basic configuration to eliminate ...
2
votes
1answer
4k views

NTP not syncing, only syncs on service restart

My ubuntu 11.10 server has been sitting there quite happily for the last 3 - 4 months, then suddenly the time started going out of sync by one hour. I'm not sure why, nothing has changed re the ...
0
votes
1answer
580 views

NTP doesn't sync

I'm using Meinberg NTP to sync the time in a VPS. The clock refuses to sync - there's a ~30s shift comparing to other servers. Also ntpq -p is continuously showing zeros for reach, delays and ...
3
votes
3answers
6k views

How to synchronize time between a Windows client and a Linux NTP server?

I want my Windows 7 machine to get its time from my Linux Debian Sid server. So I want ahead and installed OpenNTPD from the Debian repository. It doesn't listen to anything by default, so I ...
2
votes
2answers
253 views

ntpd Stratum Zero when nptd is started

I have noticed that when I start ntpd on a server, checks against that server reveal that it has a stratum of zero. If I understand this correctly, I believe this means that ntpd is currently only ...
2
votes
2answers
763 views

Synchronizing time with only one NTP server

I have a linux machine on a network where the machine only has access to exactly one NTP server. After the time synchronization the status looks like this: [root@test ~]# ntpq -p remote ...
5
votes
3answers
1k views

NTP fudge network source stratum

Is it possible to configure ntpd to fudge the stratum level of a network source? Upon first glance, I thought the fudge directive could accomplish this, however after browsing the ntp.conf(5) man ...
0
votes
3answers
1k views

NTP time sync not working in a DOMU Centos 5.5 server

I have a Xen Centos 5.5 server with ntpd working in virtual server. NTP time sync seems not working. I have disabled any firewall. my grep -i ntpd /var/log/messages output: Apr 1 16:15:47 ...
1
vote
2answers
3k views

System clock drifting out of sync with hwclock and ntpd

My current system drifts from the hwclock and ntpd dramatically. I've looked at many forums and posts online and on SF, but haven't found a suitable solution. Here is my ntpq -pn output: remote ...
1
vote
2answers
770 views

How often does openntpd update the time?

Neither the openntpd nor the ntpd.conf manpage have this information.
6
votes
7answers
3k views

Local or public NTP servers?

For a relatively large network (thousands of hosts) - what are the arguments for and against running a locally managed (pool of) NTP server(s) (perhaps periodically set via some public NTP server) and ...
8
votes
7answers
45k views

Why is ntpd not updating the time on my server?

I have ntpd running on my server. It's all the default settings, except I commented out its ability to be a server to other machines: # restrict -4 default kod notrap nomodify nopeer noquery ...
5
votes
3answers
5k views

How can I compare an ntp server's time to my server's time?

I have ntpd running on a box. I want to see how the time on the box compares to the time retrieved from ntp.ubuntu.com. Is there an easy way to do this?
1
vote
3answers
880 views

Will NTP work in an isolated network ( in absence of a reliable time source)

I am investigatiing a typical NTP problem. The setup is as follows :- FreeBSD is being compiled and run on Opensolaris. The config file on OpenSolaris has entry of linux and another opensolaris ...
0
votes
1answer
704 views

Query NTPD's monlist remotely?

How do I query NTPD for monlist remotely? It would be nice to be able to keep track of what's happening with the time server!
4
votes
3answers
745 views

Using NTP to sync a group of linux servers to a common time source

I have 20 or so linux servers and I want to sync all of their clocks to a single NTP server, which is in the same rack and switch as my servers. Nothing is virtualized. Our admins are having trouble ...
3
votes
2answers
586 views

What increments stratum in NTP?

Sorry, it's just not that clear to me from the man pages, Wikipedia, etc. I understand the concept of stratum 0 as an authoritative time source and stratum 1 as the connected server. However, I am ...
1
vote
2answers
3k views

Does NTP daemon set the host timezone?

If I am using NTP daemon or ntpdate command, do I need to worry about changing the timezone? Should I re-configure the timezone using cron job to guarantee the accuracy of the server time? I am ...
0
votes
1answer
184 views

How was my ubuntu server's time set without ntp?

I was just installing ntp on an ubuntu server that had the wrong time by a minute, and I got to wondering, how did it get any time at all to begin with? Is there some other process that sets the time ...
1
vote
3answers
251 views

What is the most simple way to automatically update the time on a server?

On ubuntu server my usual solution is just to install the ntp package and call it a day. This installs all the binaries I need and has ntpd start at boot time. Right now I'm working on a server ...
2
votes
1answer
419 views

what is the easiest way to test the impact of NTP step changes on other software?

During testing of our configuration of Red Hat Cluster System, NTP stepped the time by 16 seconds, and soon afterwards the cluster software locked up. ntpd[30917]: time reset -16.332117 s I need to ...