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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 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, because NTP doesn't sync with such a high offset.…
ujjain
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What is a realistic average time difference between servers in the same LAN?

Until recently, we had at work a small cluster of about 20 small Windows servers (which have now all been virtualized). They were all configured to synchronize with the local time server. It was on an 1Gb sub-network in our own DC. I never got them…
monster
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Identify NTP clients using my server

I have an HPUX NTP Server. It is the server for a dumb client device that has NTP built-in. I can tell the client the server IP and interval but cannot get any logging out. How do I know if NTP syncronization is taking place. Ordinarily, I would…
Jonathan
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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 configuration of the server, i read it can be down to…
Michael Barrett
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Accurate, Unspoofable Time Source

I need an unspoofable and accurate time source. Short of setting up my own atomic clock (unless that's easier than it sounds) how could I accomplish this? It's not that I don't trust the NTP pools; I don't have any assurance of who I am talking…
84104
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Seemingly poor quality of NTP time synchronization using a GPS clock

I have a Linux server which has its time synchronized to a GPS-based NTP appliance located close by. Ping times from the server to the appliance are circa 1ms, with very low jitter: --- x.x.x.x ping statistics --- 100 packets transmitted, 100…
NPE
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Looking for a NTP Server Software for Windows

I'm looking for a, preferably free, NTP Server for Windows Server 2003/2008. We have already tried the built in Windows Time Server, but our tests did show that it is not very accurate, we see time differences up to 500ms. The max time difference we…
Simon
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NTP server architecture

I have a virtual environment running several Linux boxes and I'm planning how to manage all of the ntp architecture. As far as I know, there is no use in having two servers in 'ntp.conf' file, there should be only one or more than three ntp servers…
Edgar Sampere
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How to set up local ntp server without internet access on ubuntu?

I have tried several guides on how to set up a local ntp server on ubuntu but none seem to work correctly. My servers are drifting heavily in time for some reason and I have to keep their time close together because I run databases that require…
j9dy
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DST Morocco, a way to trick NTP server

From several years Morocco have been using GMT without DST, in the past years, our government reactivated the use of DST. In the first years, the DST was a mess, different periods, starts, ends, so Microsoft tried to release some patches, they were…
hiboujid
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Windows NTP Server A Stratum is 2, Windows NTP Server B Stratum is 15

We have a network that is mostly separated from our corporate network. The corporate network uses ntp1.corpaddress.tdl. We have a second server, isolated.corpaddress.tdl. It is getting its NTP time from ntp1. We want it to act as the NTP server for…
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Active Directory Time Synchronisation - Time-Service Event ID 50

I have an Active Directory domain with two DCs. The first DC in the forest/domain is Server 2012, the second is 2008 R2. The first DC holds the PDC Emulator role. I sporadically receive a warning from the Time-Service source, event ID 50: The time…
George
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NTP Server with no connection to the internet

I have a small LAN that has no connection to the internet. It consists of two ubuntu servers clustered together providing NFS services to two IP cameras. I need to synchronize the time on all the equipment. The Cameras support NTP so my plan was to…
Matthew
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Why should I care about NTP Kernel statistics?

I'ved noticed that munin graphs a few bits of information about timing/kernel statistics that I've never quite understood. Most of my servers seem to stay close to 0, which I presume is good, but one of them is slowly but steadily getting more and…
geerlingguy
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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 first packet since it's essentially waking the…
JP Anderson
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