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- The ntp Directory
-
- This directory and its subdirectories contain the various distributions
- of the Network Time Protocol (NTP), together with related auxilliary
- programs, documentation and strange stuff. You are welcome to the lot,
- with due consideration of the COPYRIGHT files stashed in the
- distributions. You are also invited to contribute bugfixes and drivers
- for new and exotic radios, telephones and sundials.
-
- For anonymous FTP retrieval, the base directory pub/ntp contains the
- distributions and related stuff, including:
-
- bsd_audio.tar.Z Compressed tar archive containing the bsd audio driver
- for Sun workstations modified to include support for
- IRIG-B signals generated by some radio timecode
- receivers. Compatible with the xntp3.tar.Z distribution.
-
- gadget.tar.Z Compressed tar archive containing the schematics,
- artwork and related information for (a) a modem for the
- Canadian time/frequency radio service CHU, which can be
- used as a primary reference clock for NTP Version 2 and
- Version 3 daemons, and (b) a pulse shaper and line
- driver used to provide an external one-pulse-per-second
- signal from a radio clock to a serial port.
-
- icom.tar.Z Compressed tar archive containing a program to control
- HF/VHF radios made by the ICOM Corporation. It can be
- used interactively or run from a shell script to adjust
- the frequency, mode and related parameters of one or
- more radios connected to the CI-V local network. It can
- also be used in conjunction with the minimuf.tar.Z
- distribution to automatically tune radios as propagation
- conditions change throughout the seasons and hours.
-
- kernel.tar.Z Compressed tar archive containing a report and sample
- programs for Unix kernel changes to implement a
- precision, disciplined clock.
-
- loran.tar.Z Compressed tar archive containing the schematics,
- artwork and documentation for a computer-controlled
- LORAN-C timing receiver used as a precision source of
- standard time. Not recommended for beginners.
-
- minimuf.tar.Z Compressed tar archive containing a program that
- computes high frequency radio propagation data and
- delays between two geographic locations on the Earth.
- This is intended for use in setting propagation-delay
- switches on radio clocks. It can be used with the
- icom.tar.Z distribtution to automatically tune radios as
- propagation conditions change throughout the seasons and
- hours.
-
- msctime.tar.Z Compressed tar archive containing the NIST Automated
- Computer Time Service software, ported to Microsoft C
- for IBM PC and Unix C for Sun workstations (SunOS 3.2)
-
- nbstime.tar.Z Compressed tar archive containing the NIST Automated
- Computer Time Service software, as distributed by NIST.
-
- ntpdate_vms.tar.Z Compressed tar archive containing a version of the
- ntpdate utility program for the VMS operating system.
-
- wsntp?.tar.Z Compressed tar archive containing a version of the
- Simple Network Time Protocol (SNTP) for Microsoft
- Windows. The ? stands for the version number, which may
- change from time to time.
-
- xntp3.?.export.tar.Z Compressed tar archive containing the NTP Version 3
- daemon for Unix adapted from the version-3 daemon by
- Lars Mathiesen of the University of Copenhagen and many
- of his friends. Unrestricted distribution. Requires a
- software implementation of the Data Encryption Standard
- readily available outside the U.S. and Canada. The ?
- stands for the version number, which may change from
- time to time.
-
- xntp3.?.tar.Z Compressed tar archive containing the NTP Version 3
- daemon for Unix adapted from the version-3 daemon by
- Lars Mathiesen of the University of Copenhagen and many
- of his friends. Restricted for use in the US and Canada.
- The ? stands for the version number, which may change
- from time to time.
-
- The doc subdirectory includes a number of compressed files containing
- papers, rfcs and technical reports on NTP and related topics. Those with
- names ending in *.ps.Z are in PostScript, while the others are in ASCII.
- When the same document is displayed with *.ps.Z and *.txt.Z extension,
- the latter version is an ASCII-greppable file that may not violate the
- Principle of Least Astonishment with respect to the former version;
- however, much is lost in translation.
-
- accuracy.ps.Z, accuracy.txt.Z Compressed PostScript and ASCII files for
- a paper on practice and experience operating NTP in the
- global Internet
-
- Mills, D.L. On the accuracy and stability of clocks
- synchronized by the Network Time Protocol in the
- Internet system. ACM Computer Communication Review 20, 1
- (January 1990), 65-75.
-
- algorithm.ps.Z Compressed PostScript file for a paper on NTP
- algorithms.
-
- Mills, D.L. Improved algorithms for synchronizing
- computer network clocks. Proc. ACM SIGCOMM 94 Symposium
- (London UK, September 1994), 317-327.
-
- clock.txt ASCII file containing (a) a list of primary (stratum 1)
- servers operating in the Internet, (b) a list of
- secondary (stratum 2) servers operating in the Internet,
- (c) a list of known radio timecode receivers along with
- addresses and phone numbers of the suppliers, (d) bits
- of riffraff information that defy classification. This
- file is updated on a haphazard basis at irregular
- intervals.
-
- dts1.txt.Z, dts2.txt.Z Compressed ASCII files containing unpublished
- message digests comparing NTP and the Digital Time
- Synchronization Service (DTSS). Note: this is an
- informal discussion and should not be quoted or
- excerpted, even with attribution.
-
- dts3.ps.Z, dts3.txt.Z Compressed PostScript and ASCII files for an
- unpublished technical memorandum comparing NTP and the
- Digital Time Synchronization Service (DTSS). Note: this
- memorandum is intended for professional use only and
- should not be cited or excerpted without the consent of
- the author.
-
- faq.Z Compressed ASCII file containing frequently asked
- questions about NTP, its installation, configuration and
- management. Refreshed at irregular intervals.
-
- fine.tar.Z Compressed tar archive containing PostScript files for a
- report on finicky synchronization schemes.
-
- Mills, D. L. Precision synchronization of computer
- network clocks. Electrical Engineering Department Report
- 93-11-1, University of Delaware, November 1993, 66 pp.
-
- fine.ps.Z Compressed PostScript file for a paper on finicky
- synchronization schemes.
-
- Mills, D.L. Precision synchronization of computer
- network clocks. ACM Computer Communication Review 24, 2
- (April 1994). 16 pp.
-
- fuzzball.ps.Z Compressed PostScript file for a paper describing the
- infamous Fuzzball operating system and culture for the
- PDP11 and relatives. When the last fuzzball dies, this
- will be of historic interest only.
-
- Mills, D.L. The Fuzzball. Proc. ACM SIGCOMM 88 Symposium
- (Palo Alto CA, August 1988), 115-122.
-
- info1.txt.Z, info2.txt.Z Compressed ASCII files containing useful hints
- and kinks on setting up NTP service
-
- jaguar.txt.Z Compressed ASCII file containing a job description for a
- Maya high priest taken from the Book of Chillum Balum.
- Useful for after-dinner speakers and rally cheerleaders.
-
- kern.tar.Z Compressed tar archive containing PostScript files for a
- report on Unix kernel modifications to achieve precision
- time. Updates RFC-1589.
-
- Mills, D.L. Unix kernel modifications for precision time
- synchronization. Electrical Engineering Department Report
- 94-10-1, University of Delaware, October 1994, 24 pp.
-
- models.tar.Z Compressed tar archive containing PostScript files for a
- report on computer clock models.
-
- Mills, D.L. Modelling and analysis of computer network
- clocks. Electrical Engineering Department Report 92-5-2,
- University of Delaware, May 1992, 29 pp.
-
- nsfnet.ps.Z Compressed PostScript file containing a paper on the
- NSFnet Phase-I Backbone Network, in which NTP played a
- prominent part. Of historic interest.
-
- Mills, D.L., and H.-W. Braun. The NSFNET Backbone
- Network. Proc. ACM SIGCOMM 87 Symposium (Stoweflake VT,
- August 1987), 191-196.
-
- ntp.ps.Z, ntp.txt.Z Compressed PostScript and ASCII files for a paper
- describing the architecture and protocol design of NTP.
-
- Mills, D.L. Internet time synchronization: the Network
- Time Protocol. IEEE Trans. Communications 39, 10
- (October 1991), 1482-1493.
-
- ntpv4.tar.Z Compresed tar archive containing PostScript files for a
- report on proposed NTP Version 4 changes.
-
- Mills, D.L., and Ajit Thyagarajan. Network Time Protocol
- version 4 proposed changes. Electrical Engineering
- Report 94-10-2, October 1994, 52 pp.
-
- rfc1119.ps.Z, rfc1119.txt.Z Compressed PostScript and ASCII files for
- the NTP Version 2 specification. Of historic interest.
-
- Mills, D.L. Network Time Protocol (Version 2)
- specification and implementation. DARPA Network Working
- Group Report RFC-1119, University of Delaware, September
- 1989. Also published as: Electrical Engineering
- Department Report 89-9-2, University of Delaware,
- September 1989.
-
- rfc1128.ps.Z, rfc1128.txt.Z Compressed PostScript and ASCII files for
- rfc1128 available from Internet archive sites.
-
- Mills, D.L. Measured performance of the Network Time
- Protocol in the Internet system. DARPA Network Working
- Group Report RFC-1128, University of Delaware, October
- 1989. Also published as: Electrical Engineering
- Department Report 89-9-3, University of Delaware,
- September 1989.
-
- rfc1129.ps.Z, rfc1129.txt.Z Compressed PostScript and ASCII files for
- rfc1128 available from Internet archive sites.
-
- Mills, D.L. Internet time synchronization: the Network
- Time Protocol. DARPA Network Working Group Report RFC-
- 1129, University of Delaware, October 1989. Also
- published as: Electrical Engineering Department Report
- 89-9-1, University of Delaware, September 1989.
-
- rfc11305.tar.Z Compressed tar archive for rfc1305 available from
- Internet archive sites
-
- rfc1305a.ps.Z, rfc1305b.ps.Z, rfc1305c.ps.Z Compressed PostScript and
- ASCII files for rfc1305 available from Internet archive
- sites.
-
- Mills, D.L. Network Time Protocol (Version 3)
- specification, implementation and analysis. DARPA
- Network Working Group Report RFC-1305, University of
- Delaware, March 1992, 113 pp. Previous draft published
- as: Electrical Engineering Department Report 90-6-1,
- University of Delaware, June 1990.
-
- rfc1361.txt.Z Compressed ASCII file for rfc1361 available from
- Internet archive sites.
-
- Mills, D.L. Simple Network Time Protocol (SNTP). DARPA
- Network Working Group Report RFC-1361, University of
- Delaware, August 1992, 10 pp.
-
- rfc1589.txt.Z Compressed ASCII file for rfc1589 available from
- Internet archive sites.
-
- Mills, D.L. A kernel model for precision timekeeping.
- ARPA Network Working Group Report RFC-1589, University
- of Delaware, March 1994. 31 pp.
-
- sntp.txt.Z Compressed ASCII file for a revision and update of
- rfc1361 submitted to the RFC Editor.
-
- Mills, D.L. Simple Network Time Protocol (SNTP). DARPA
- Network Working Group Report RFC-XXXX, University of
- Delaware, September 1994, 12 pp.
-
- security.ps.Z Compressed PostScript file containing a draft of a
- report by Matt Bishop discussing security issues in NTP.
- It should not be cited or excerpted without the
- permission of the author.
-
- time.ps.Z, time.txt.Z Compressed PostScript and ASCII files for a paper
- discussing issues in timescales, calendrics and
- associated mythology.
-
- Mills, D.L. On the chronology and metrology of computer
- network timescales and their application to the Network
- Time Protocol. ACM Computer Communications Review 21, 5
- (October 1991), 8-17.
-
- wiretap.ps.Z Compressed PostScript file for a paper on routing in
- packet-radio networks. Off the wall, but whattheheck.
- Mills, D.L. Wiretap: an experimental multiple-path
- routing algorithm. ACM Computer Communication Review 19,
- 1 (January 1989), 85-98.
-
- The depredated directory contains previous versions of the NTP protocol
- implementations. There use is strongly discouraged in new installations.
- There is no guarantee that these versions will be supported in future.
-
- ntp.3.4 Subdirectory containing the NTP Version 1 daemon for
- Unix written by Michael Petry and Louis Mamakos of the
- University of Maryland. Not recommended for new
- installations.
-
- xntp2 Subdirectory containing the NTP Version 2 daemon for
- Unix written by Dennis Fergusson of the University of
- Toronto. Not recoommended for new installations.
-
- xntp3.3wx.tar.Z Compressed tar archive containing a prior version of
- xntp3 intended for program development purposes only.
- This version works for most machines, except the Cray.
-
- xntp3.3wy.tar.Z Compressed tar archive containing a prior version of
- xntp3 intended for program development purposes only.
- This version works for the Cray.
-