NTP stands for Network Time Protocol. It is an application layer protocol.

Network Time Protocol (NTP), discussed in RFCs 1305 and 2030, provides a distributed mechanism for synchronizing the system clocks on computers across a network.
More information

Subcategories 2

Centralx Time
An accurate time provider, contributes with the NTP Pool Project.
David and Cecilia Taylor
Several well-documented projects involving implementing and testing NTP.
Flawed Routers Flood University of Wisconsin Internet Time Server
Report by Dave Plonka on the massive problems caused on the University of Wisconsin network and time servers, due to misconfiguration of NetGear equipment.
Galleon Systems
Galleon Systems provides time synchronisation hardware and software solutions.
Google Groups: comp.protocols.time.ntp
Discussion group on NTP. May require a Google login.
Home of the Network Time Protocol
NTP official reference implementation (for Unix and Unix-like OSes, with ports to Microsoft Windows NT, VMS, real-time OSes like VxWorks and QNX). Also jumping-off point to the official NTP documentation and FAQ, community documentation tools (twiki), pool.ntp.org, and related projects.
Network Time Foundation
The network time foundation develops, produces and maintains the most widely used open source time synchronisation software.
Network Time Protocol at the University of Michigan
A discussion of why and how to set up NTP software. Some information is specific to the University, some is more general.
Network Time Synchronization Project
NTP Project page for Dr. Mills, primary NTP researcher for over twenty years. He and his students are working on NTP version 4 to improve robustness and security.
The NTP FAQ and HOWTO
Understanding and using the Network Time Protocol (A first try on a non-technical Mini-HOWTO and FAQ on NTP)
NTP Pool Project
A big virtual cluster of timeservers providing reliable easy to use NTP service for millions of clients.
NTP Servers Web
Community maintained list of public Stratum 1 and Stratum 2 NTP time servers, including policies and requirements for use, contact information. Maintained via the NTP TWiki, by the admins of the respective sites themselves.
NTP Support Web
Not the official NTP documentation or the official NTP FAQ. Intended to be the collection point for cookbook configurations, tips, hints, tricks, and other comments from directly from various members of the NTP community that might be beneficial to others within the community.
O'Reilly Cisco Cookbook
This book gathers hundreds of example router configurations all in one place. In chapter 14, the authors provide information on configuring, running, and debugging NTP on your Cisco router.
RFC1305 - Network Time Protocol (Version 3)
The current NTP standard. Available here in HTML, PDF, and Postscript formats.
RFC2030 - Simple Network Time Protocol Version 4
The current standard for SNTP, a version of the protocol for implementations which do not need all of the features of NTP. Available here in HTML, PDF, and Postscript formats.
Vendor: endruntechnologies.com: Introduction to NTP
Four page document that gives a very simple high-level overview of how NTP works and some of the issues to be considered when looking to set up NTP time servers. This company is a vendor of NTP time servers and related hardware. [PDF]
RFC1305 - Network Time Protocol (Version 3)
The current NTP standard. Available here in HTML, PDF, and Postscript formats.
Network Time Synchronization Project
NTP Project page for Dr. Mills, primary NTP researcher for over twenty years. He and his students are working on NTP version 4 to improve robustness and security.
David and Cecilia Taylor
Several well-documented projects involving implementing and testing NTP.
NTP Servers Web
Community maintained list of public Stratum 1 and Stratum 2 NTP time servers, including policies and requirements for use, contact information. Maintained via the NTP TWiki, by the admins of the respective sites themselves.
Network Time Protocol at the University of Michigan
A discussion of why and how to set up NTP software. Some information is specific to the University, some is more general.
Centralx Time
An accurate time provider, contributes with the NTP Pool Project.
Vendor: endruntechnologies.com: Introduction to NTP
Four page document that gives a very simple high-level overview of how NTP works and some of the issues to be considered when looking to set up NTP time servers. This company is a vendor of NTP time servers and related hardware. [PDF]
NTP Support Web
Not the official NTP documentation or the official NTP FAQ. Intended to be the collection point for cookbook configurations, tips, hints, tricks, and other comments from directly from various members of the NTP community that might be beneficial to others within the community.
Home of the Network Time Protocol
NTP official reference implementation (for Unix and Unix-like OSes, with ports to Microsoft Windows NT, VMS, real-time OSes like VxWorks and QNX). Also jumping-off point to the official NTP documentation and FAQ, community documentation tools (twiki), pool.ntp.org, and related projects.
O'Reilly Cisco Cookbook
This book gathers hundreds of example router configurations all in one place. In chapter 14, the authors provide information on configuring, running, and debugging NTP on your Cisco router.
RFC2030 - Simple Network Time Protocol Version 4
The current standard for SNTP, a version of the protocol for implementations which do not need all of the features of NTP. Available here in HTML, PDF, and Postscript formats.
Google Groups: comp.protocols.time.ntp
Discussion group on NTP. May require a Google login.
Network Time Foundation
The network time foundation develops, produces and maintains the most widely used open source time synchronisation software.
Galleon Systems
Galleon Systems provides time synchronisation hardware and software solutions.
NTP Pool Project
A big virtual cluster of timeservers providing reliable easy to use NTP service for millions of clients.
Flawed Routers Flood University of Wisconsin Internet Time Server
Report by Dave Plonka on the massive problems caused on the University of Wisconsin network and time servers, due to misconfiguration of NetGear equipment.
The NTP FAQ and HOWTO
Understanding and using the Network Time Protocol (A first try on a non-technical Mini-HOWTO and FAQ on NTP)

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Last update:
February 1, 2019 at 10:47:40 UTC
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