Directory of NTP Resources

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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.

Subcategories

• Client Software
• Server Software

Resources in This Category

• Centralx Time

  http://www.centralx.com/time
  An accurate time provider, contributes with the NTP Pool Project.

• Flawed Routers Flood University of Wisconsin Internet Time Server

  http://pages.cs.wisc.edu/~plonka/netgear-sntp/
  Report by Dave Plonka on the massive problems caused on the University of Wisconsin network and time servers, due to misconfiguration of NetGear equipment.

• Geodsoft How-To: NTP Time Synchronization

  http://geodsoft.com/howto/timesync/
  A tutorial on installing NTP servers on UNIX (OpenBSD and Linux) and Windows to accurately synchronize computer times.

• Home of the Network Time Protocol

  http://www.ntp.org/
  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.

• LinuxDevCenter.com: Synchronizing Networks with NTP

  http://www.linuxdevcenter.com/pub/a/linux/2003/01/02/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.

• Network Time Protocol at the University of Michigan

  http://www.umich.edu/~rsug/services/ntp.html
  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

  http://www.eecis.udel.edu/~mills/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.

• NTP Servers Web

  http://support.ntp.org/bin/view/Servers/WebHome
  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

  http://support.ntp.org/bin/view/Support/WebHome
  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

  http://my.safaribooksonline.com/0596003676?portal=oreilly
  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.

• pool.ntp.org: The Internet Time Network

  http://www.pool.ntp.org/
  Information on a collection of public NTP servers provided by users and ISP's placed in a DNS round-robin under pool.ntp.org.

• RFC1305 - Network Time Protocol (Version 3)

  http://tools.ietf.org/html/rfc1305
  The current NTP standard. Available here in HTML, PDF, and Postscript formats.

• RFC2030 - Simple Network Time Protocol Version 4

  http://tools.ietf.org/html/rfc2030
  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.

• The NTP FAQ and HOWTO

  http://www.ntp.org/ntpfaq/NTP-a-faq.htm
  Understanding and using the Network Time Protocol (A first try on a non-technical Mini-HOWTO and FAQ on NTP)

• Vendor: endruntechnologies.com: Introduction to NTP

  http://www.endruntechnologies.com/pdf/NTP-Intro.pdf
  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.

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