Network Time Protocol (NTP), discussed in RFCs 1305 and 2030, provides a distributed mechanism for synchronizing the system clocks on computers across a network. This category contains sites with information on the protocol. Sites for NTP client software should be submitted to Computers / Software / Internet / Clients / Time while sites describing NTP server software or sites from companies which provide equipment to support the protocol should be submitted to Computers / Software / Internet / Servers / Time. Sites which discuss other aspects of time and sites which display the current time from the web should be placed in Reference / Time.
NTP official reference implementation (for Unix and Unix-like OSes, with ports to Microsoft Windows NT, VMS, real-time OSes like VxWorks and QNX, etc...). Also jumping-off point to the official NTP documentation and FAQ, community documentation tools (tw www.ntp.org
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. www.faqs.org/rfcs/rfc2030.html
Aimed primarily at helping internal BNL.gov users with NTP, this page provides useful setup information for various flavors of Unix. www.ccd.bnl.gov/xntp
A discussion of why and how to set up NTP software. Some information is specific to the Unversity, some is more general. www.umich.edu/~rsug/services/ntp.html
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. www.eecis.udel.edu/~mills/ntp.html
Accurate timekeeping is vital to accurate records, and accurate logs are the mainstay of good system administration. Glenn Graham explains NTP (the Network Time Protocol) and how to put it to work on your network. www.linuxdevcenter.com/pub/a/linux/2003/01/02/ntp.html
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. This link via O'Reilly's Safari network for online publications safari.oreilly.com/..
Report by Dave Plonka on the massive problems caused on the University of Wisconsin network and time servers, due to misconfiguration of NetGear equipment www.cs.wisc.edu/~plonka/netgear-sntp
Community maintained list of Stratum 1 and Stratum 2 NTP time servers, including policies and requirements for use, contact info, etc.... Maintained via the NTP TWiki, by the admins of the respective sites themselves. twiki.ntp.org/bin/view/Servers/WebHome
Variety of mailing lists used to support ntp.org, including the announce list, CVS logs, bugs, and questions (which is gatewayed to the USENET newsgroup comp.protocols.time.ntp). mailman.ntp.org/mailman/listinfo
This article is the first of a series on the Network Time Protocol (NTP). NTP allows synchronizing clocks on different network nodes, which is critical in today's networked world. This first article provides an overview of why time synchronization is impo www.sun.com/blueprints/0701/NTP.pdf
This is Part 2 of a three-article series that discusses how to use Network Time Protocol (NTP) to synchronize system clocks. This article explains the basics of client and server administration, covering various client/server configurations, as well as au www.sun.com/blueprints/0801/NTPpt2.pdf
This article is the third in a series of three articles that discuss using Network Time Protocol (NTP) to synchronize system clocks. The goal of this article is to provide an effective understanding of NTP troubleshooting and monitoring. www.sun.com/blueprints/0901/NTPpt3.pdf
This article addresses the time skew issues for the Sun Fire 12K/F15K server and explains how the system controllers and domains can be configured as NTP clients to external servers. A sample configuration is also provided. This article is targeted to the www.sun.com/blueprints/0603/817-2979.pdf
David Taylor's short description of how he uses MRTG (and SNMP) to gather and report statistics for NTP for his servers, including Perl scripts, shell scripts, and mrtg.conf examples www.david-taylor.myby.co.uk/ntp/NTPandMRTG.txt
Even though this is hosted at ntp.org, this is not the official NTP documentation or the official NTP FAQ. This is intended to be the collection point for cookbook configurations, tips, hints, tricks, and other comments from directly from various members twiki.ntp.org/bin/view/Support/WebHome
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. www.endruntechnologies.com/pdf/NTP-Intro.pdf
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