Control Messages Protocol for Use with Network Time Protocol Version 4

The information below is for an old version of the document
Document Type Expired Internet-Draft (ntp WG)
Author Brian Haberman 
Last updated 2019-03-31 (latest revision 2018-09-27)
Replaces draft-haberman-ntpwg-mode-6-cmds
Stream IETF
Intended RFC status Informational
Expired & archived
pdf htmlized (tools) htmlized bibtex
Additional Resources
- Mailing list discussion
Stream WG state WG Consensus: Waiting for Write-Up
Document shepherd Karen O'Donoghue
IESG IESG state Expired
Consensus Boilerplate Yes
Telechat date
Responsible AD (None)
Send notices to Karen O'Donoghue <>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes the structure of the control messages that were historically used with the Network Time Protocol before the advent of more modern control and management approaches. These control messages have been used to monitor and control the Network Time Protocol application running on any IP network attached computer. The information in this document was originally described in Appendix B of RFC 1305. The goal of this document is to provide a current, but historic, description of the control messages as described in RFC 1305 and any additional commands implemented in NTP. The publication of this document is not meant to encourage the developement and deployment of these control messages. This document is only providing a current reference for these control messages given the current status of RFC 1305.


Brian Haberman (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)