r4 - 2003-11-10 - 02:46:15 - SteveKosteckeYou are here: NTP >  Support Web > WebChanges
NTP users are strongly urged to take immediate action to ensure that their NTP daemons are not susceptible to use in a distributed denial-of-service (DDoS) attack. Please also take this opportunity to defeat denial-of-service attacks by implementing ingress and Egress filtering through BCP38.

ntp-4.2.8p3 was released on 29 June 2015, and addresses leap-second issues and a minor security issue.

Please see the NTP Security Notice for vulnerability and mitigation details.

Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.

50 Recent Changes in Support Web retrieved at 17:56 (GMT)

Statistics for Support Web Month: Topic views: Topic saves: File uploads: Most popular topic views: Top contributors for topic save and ...
REFID Format Related Topics: , UpdatingTheRefidFormat, LeapSmearForNTPv4 The peers command of the ntpq utility (also available using the ntpq p command ...
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 ...
Motorola Oncore Refclock Users NTP Version Operating System Computer Oncore Model # Status Who 4.2.0 Solaris 8 Sun Ultra 10 M12 T ...
TOPIC TITLE HERE REPLACE ME WITH YOUR TEXT The NAVBAR and SECTION0 lines are required for topics that will be listed in the TableOfContents. You may delete the NTPNAV ...
To subscribe to this nop WebNotify service please add a bullet with your .WikiName in ALPHABETICAL order to this list: Format: space space space , followed ...
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 ...
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 ...
TOPIC TITLE HERE REPLACE ME WITH YOUR TEXT The NAVBAR and SECTION0 lines are required for topics that will be listed in the TableOfContents. You may delete the NTPNAV ...
ntpd access restrictions Restrictions are used to control access to your ntpd and are, unfortunately, one of the most misunderstood parts of ntpd configuration ...
Locking ntpd in memory Currently, ntpd will lock itself in memory if the appropriate system calls are available. This is generally good because it means ntpd can ...
Garmin Refclock Users NTP Version Operating System Computer Vendor and Model # Status Who 4.2.4 FreeBSD6 x86 64 18 LVC works ...
Time Scales There are two primary time scales used today, and http://en.wikipedia.org/wiki/UTC UTC. As of 2006, TAI is ahead of UTC by 23 seconds. This is really ...
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 ...
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 ...
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 ...
Vendor Links The following NTP related links are (usually) contributed, and maintained, by the respective vendor. Individuals finding errors are encouraged to contact ...
Known Operating System Issues Lost Interrupts There are several mechanisms for systems to miss timer interrupts. All cause troubles for time keeping. Scheduler HZ ...
Motivation for NTP Clocks in Computers and Hardware devices are problematic. Unsynchronized, they drift, sometimes very rapidly and certainly unpredictably. This can ...
Technical Background Information Motivation Theory of Operation The Protocol The Algorithms Operational Considerations
NTP: Theory of Operation Talk about the t1, t2, t3, t4 timestamps. Talk about the various noise frequencies, and how we can do better by finding and tracking these ...
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 ...
Choosing Reference Clocks There are many choices for reference clocks. In increasing levels of precision they are: modem refclocks radio refclocks ...
# # Configuring NMEA Refclocks Generic NMEA refclocks use the 127.127.20.x driver. The configuration directives required depends on the receiver and its internal ...
TOPIC TITLE HERE REPLACE ME WITH YOUR TEXT The NAVBAR and SECTION0 lines are required for topics that will be listed in the TableOfContents. You may delete the NTPNAV ...
Known Hardware Issues APIC and ACPI These can cause problems for maintaining clock accuracy. See the APIC and ACPI topics under ConfiguringTrimblePalisadeAcutimeRefclocks ...
Java SNTP Client This is a Java implementation of an NTP client, and is released under the GPL license. It handles NTP parameters as native Java types, making it Java ...
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 ...
NMEA Refclock Users NTP Version Operating System Computer Vendor and Model # Status Who 4.2.4p4 Linux 2.4.20.NANO, FreeBSD 6.2 x86 ...
Monitoring and Controlling NTP See TroubleshootingNTP for checking the behavior of a particular machine. Monitoring NTP For ongoing monitoring of an NTP network there ...
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 ...
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 ...
Mailing List Moderators wanted
Help Wanted Mailing List Moderators wanted We one (or more) volunteers who are willing to donate ~5 to ~20 minutes a day (total) to moderate our 41 (!) mailing lists ...
Help Wanted View complete list Support Updates: View complete list Current Versions ...
Improving the SHM Refclock 127.127.28.u where unit ( u ) values of 0 and 1 are 0600 from NTP's POV, and units 2 and 3 are 0666 . The SHM refclock could stand ...
Configuring SHM Refclocks Under LINUX there is the gpsd service which provides SHM services. In ntp.conf include lines: # ... and use gpsd daemon for time sync server ...
!! Configuring Parse Refclocks Related Topics: : ParseRefclockUsers Configuring a Meinberg GPS167BGT Harlan uses the Yost serial connector scheme. The COMx and ...
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 ...
Inexpensive OEM GPS Receivers With PPS Garmin GPS 18LVC Refclock Driver: Type 20 PPS: 1us Cost: ~$70 $80 (2007 11 10) Specifications: http ...
Yost Serial Connectors http://yost.com/computers/RJ45 serial/ http://www.sol.net/serial guide/ Harlan makes one change to the above he does a pigtail to ...
Troubleshooting NTP First things first. Please be sure you have your NTP network properly designed. Also make sure you have NTP properly configured. If your ntp.conf ...
Modem Refclock Users NTP Version Operating System Modem Service Status Who dev (and older) NIST, USNO Working Dave Mills ...
Configuring Spectracom TSync PCI Refclocks HarlanStenn 2012 03 26
Configuring Refclocks By Name By Refclock Driver Number Adjusting Radioclocks #ByName By Name Configuring ATOM (PPS) Refclocks Configuring ...
TOPIC TITLE HERE 58558556 The NAVBAR and SECTION0 lines are required for topics that will be listed in the TableOfContents. You may delete the NTPNAV and SECTION0 ...
WWV Refclock Users NTP Version Operating System Computer WWV Receiver Status Who 4.2.5p117 #64;1.1730 o Linux/2.6.24.2 PII/400 Ramsey ...
WWVB Refclock Users NTP Version Operating System Computer WWVB Receiver Status Who 4.2.0 1.1161 nop FreeBSD 5.4 433 MHz PC Spectracom ...
Trimble Palisade Acutime Refclock Users NTP Version Operating System Computer Model # Status Who 4.2.4 Debian Linux 300 Mhz Trimble ...
Jupiter Refclock Users NTP Version Operating System Computer Jupiter Model # Status Who 4.x (any) FreeBSD 6.1 300 MHz Geode TU30 ...
Number of topics: 50

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