Documentation

Click here to read the current documentation (4.2.8-series).

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Documentation Archives

Archived documentation for older major NTP releases is available:

• 4.2.6-series
• 4.2.4-series
• 4.2.2-series
• 4.2.0
• 4.1.2
• 4.1.1
• 4.1.0
• 3-5.93e

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Additional Information

In addition to the implementation documentation, the following resources are available:

• Reference Library: Whitepapers, RFCs, and other technical documents written by Professor David L. Mills, inventor of NTP.
• NTP Wiki: Community contributed documentation.
• NTP FAQ: Frequently Asked Questions about the NTP protocol and software distribution.
• Public Time Server Lists: Provides an interface to browse or search for a public primary or secondary time server.
• comp.protocols.time.ntp: Google group. Includes postings from original Usenet newsgroup going back to June, 1990.