Network Time Foundation:
50 Recent Changes in Support Web
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2021-10-02 - 05:01
Statistics for Support Web Month: Topic views: Topic saves: File uploads: Most popular topic views: Top contributors for topic save and ...
2021-04-29 - 00:27
Monitoring and Controlling NTP See TroubleshootingNTP for checking the behavior of a particular machine. Monitoring NTP For ongoing monitoring of an NTP network there ...
2020-06-16 - 22:27
NTP Support Web This is a web based collaboration area for Community Supported Documentation for the reference implementation of NTP from www.ntp.org. Please see the ...
2019-12-24 - 09:24
# # Configuring NMEA Refclocks Generic NMEA refclocks use the 127.127.20.x driver. The configuration directives required depends on the receiver and its internal ...
2019-12-15 - 11:21
Configuring Garmin Refclocks General Notes The Garmin GPS18 LVC works well with NTP. Beware: The other models of the GPS18 don't have PPS support. You should be able ...
2019-08-23 - 07:11
Quick Start Guides Hints Documentation: Quick Start Page GettingStarted NTP 4.x for Windows NT Hints DaleWorley2 External Documents Windows ...
2019-07-24 - 15:18
Time Scales There are two primary time scales used today, and https://en.wikipedia.org/wiki/UTC UTC. As of 2006, 23 leap seconds have been added to UTC. UTC was ...
2019-07-24 - 10:40
Vendor Links The following NTP related links are (usually) contributed, and maintained, by the respective vendor. Individuals finding errors are encouraged to contact ...
2018-11-30 - 02:23
Configuring NTP Simple Client Configuration 4.2.7 and Later Simple Client Configuration, Visible on the Internet This is the minimum configuration for an NTP Client ...
2018-08-09 - 21:17
Windows Time Service Beginning with Windows 2000, Microsoft includes the Windows Time Service with all versions of Windows. Initially, the pupose of Windows Time Service ...
2017-03-29 - 09:45
Installing NTP NTP may be installed from the original source code, released by the Project (which was originally from the University of Delaware starting in the 1980s ...
2015-08-19 - 10:11
Orphan mode Orphan Mode is the replacement for the UndisciplinedLocalClock. It was added to ntp 4.2.2. Orphan Mode allows a group of ntpd processes to automonously ...
2015-05-22 - 00:51
NTP related definitions Many of the following come from the RFCs. The following terms are defined in RFC 1305: $ Stability: How well a clock can maintain a constant ...
2015-03-16 - 10:46
ntpd access restrictions Restrictions are used to control access to your ntpd and are, unfortunately, one of the most misunderstood parts of ntpd configuration ...
2015-02-10 - 09:30
Garmin Refclock Users NTP Version Operating System Computer Vendor and Model # Status Who 4.2.4 FreeBSD6 x86 64 18 LVC works ...
2014-12-22 - 07:05
Configuring ATOM (PPS) Refclocks The ATOM refclock is built by default. Building is enabled/disabled by the option enable ATOM or disable ATOM in the 'configure ...
2014-07-30 - 22:32
Undisciplined Local Clock The Undisciplined Local Clock should generally no longer be used. It was originally designed to be used when an ntpd must be able to serve ...
2014-03-02 - 20:55
Known Operating System Issues Lost Interrupts There are several mechanisms for systems to miss timer interrupts. All cause troubles for time keeping. Scheduler HZ ...
2013-12-02 - 09:32
Choosing Reference Clocks There are many choices for reference clocks. In increasing levels of precision they are: modem refclocks radio refclocks ...
2013-06-29 - 22:38
Known Hardware Issues APIC and ACPI These can cause problems for maintaining clock accuracy. See the APIC and ACPI topics under ConfiguringTrimblePalisadeAcutimeRefclocks ...
2013-03-15 - 15:32
Configuring Trimble Palisade/Acutime Refclocks This topic explains how to get a Trimble Palisade/Acutime refclock working and points out some tips that will be useful ...
2012-12-14 - 21:30
Autokey Configuration for NTP 4.2.4 (and earlier) This topic provides a step by step guide for setting up NTP Autokey Authentication for NTP versions up through 4 ...
2012-12-14 - 21:29
Autokey Configuration for NTP stable releases This topic provides a step by step guide for setting up NTP Autokey Authentication for NTP stable release versions 4 ...
2012-07-24 - 05:51
Inexpensive OEM GPS Receivers With PPS Garmin GPS 18LVC Refclock Driver: Type 20 PPS: 1us Cost: ~$70 $80 (2007 11 10) Specifications: https ...
2012-07-24 - 02:00
Yost Serial Connectors https://yost.com/computers/RJ45 serial/ https://www.sol.net/serial guide/ Harlan makes one change to the above he does a pigtail ...
2011-03-16 - 13:11
Selecting Offsite NTP Servers Upstream Time Server Selection Criteria When looking for off site NTP servers to be used, keep some things in mind: Rules of Engagement ...
2010-07-08 - 07:10
NTP Related RFCs Draft RFCs (None at this time) Current RFCs 5905: Network Time Protocol Version 4: Protocol and Algorithms Specification 5906: Network ...
2009-10-28 - 21:46
Configuring WWV Refclocks These notes concern getting the WWV refclock driver working on Linux. Redhat linux 9.0 did not work with ntp 4.2.0 due to some unsupported ...
2009-09-23 - 12:34
u blox Antaris Refclock Users (If you think more/different columns are needed, please edit accordingly!) NTP Version Operating System Computer Model ...
2009-09-16 - 14:04
TOPIC TITLE HERE Security of NTP see https://www.ietf.org/rfc/rfc1305.txt Appendix C RalfHauser 16 Sep 2009
2009-01-06 - 12:12
VMware and NTP General Notes VMWare ESX server includes a version of the reference implementation ntpd running as a service in the VMware service console. As of ESX ...
2008-11-13 - 22:57
Configuring Modem Refclocks ACTS Dave Mills uses: server 127.127.18.1 minpoll 12 maxpoll 17 phone atdt913034944774 atdt917195676742 This calls NIST in Boulder ...
2008-09-14 - 03:39
Supybot Wrangler Wanted We use a on Main.ContactInformation the NTP Project IRC channels and we could really use somebody who to "take care of it" and help make ...
2008-07-20 - 19:30
NTP 4.x for Windows NT The document included in this topic is not cached , it is included from its original location (https://www.eecis.udel.edu/~mills/ntp/html ...
2008-03-27 - 04:24
Configuring HP Z3801A Refclocks The HP Z3801A is popular with hams. They also make great reference clocks for NTP. A large number of them were available surplus from ...
2008-03-27 - 04:20
Z3801A GPS receiver modifications Description The Z3801A is a GPS timing receiver designed for CDMA base stations. Many of these devices are available on the surplus ...
2008-02-25 - 13:48
Cisco NTP Almost all Cisco networking devices (routers, switches, firewalls, etc.) include an NTP implementation. Some routing protocols require synchronized time ...
2008-02-22 - 16:47
OpenNTPD OpenNTPD is an independent partial re implementation of NTP. It aims to be a simple, reliable, and highly secure implementation. Related Topics: OpenNTPD ...
2008-02-22 - 16:45
Chrony Chrony is an NTP implementation for UNIX like operating systems that is designed to work well on systems with intermittent network connectivity. Related Topics ...
2008-02-22 - 16:38
Other Implementations Of NTP An index of third party implementations of NTP.
2008-02-22 - 02:40
Clock Links General interest, non commercial, time related links. Tube Clocks and the Nixie Wristwatch Jeff Thomas / Resonant Instruments LLC LeapSecond ...
2007-12-21 - 23:53
Please contact postmaster #64;ntp.org if you have any questions about anything related to the mail system for ntp.org or the mailing lists we host at our site. If ...
2007-12-21 - 23:53
The Project uses the following dynamic Black Lists to reduce the amount of spam delivered through our mail server: rbl plus.mail abuse.org blackholes.mail ...
2007-12-21 - 23:50
The Project uses a variety of standard anti spam techniques to protect our mail server from excessive abuse from spammers, including but not limited to the following ...
2007-12-21 - 16:14
Starting NTP 4 Start ntpd as Early as Possible As early as possible in the boot sequence, run: ntpd g N (note that in versions 4.0 thru 4.1.2, you must ...
2007-05-05 - 16:48
Configuring u blox Antaris Refclock The GPS receiver from u blox is very nice for the use as a time source, as the 1 PPS time pulse is routed to the DCD line of its ...
2007-05-05 - 16:44
Configuring Jupiter Refclock with linux This driver is only valid for Jupiter GPS Modules that support the Rockwell/Conexant/Navman binary interface (up to the model ...
2006-12-26 - 14:20
nop NTP sidebar configuration See also .TWikiSideBar. Navigation Help Wanted FAQ Pool Docs
2006-03-20 - 16:52
How to calibrate the system clock using NTP If you have a NTP daemon running and configured for a reliable time server, NTP will discipline your system clock. If you ...
2005-12-15 - 09:02
Designing Your NTP Network The design of your NTP network depends on: your reliability goals your physical network layout the number of machines that ...
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