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NTP: The Network Time Protocol
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NTP users are strongly urged to take immediate action to ensure that their NTP daemons are not
susceptible to being used in distributed denial-of-service (DDoS) attacks. Please also take this
opportunity to defeat denial-of-service attacks by implementing_Ingress and Egress filtering_through
NETWORINDATION
BCP38_
ntp-
2.8p15 was released on 23 June 2020.
It addresses
medium-severity security issue in ntpd, and provides 13 other non-security fixes
NTP Projects
improvements over 4.2.8p14.
R & D
Public Services
Please see our NTP Security Notice page for vulnerability
mitigation details.
Useful Links
Welcome to ntp.org; home of the Network Time Protocol project.
Contributors
Developer Notes
This page is home for the NTP Project (R&D) This web site, and all pages directly contained within; are in the
domain. Some portions of this site may be
copyrighted by other
Issues and Bugs
authors. Please contact the webmaster with any questions regarding copyright: The NTP software distribution is
copyrighted; as described in the NTP copyightpage
RFCs
Time Servers
NTP is a protocol designed to synchronize the clocks of computers over a network:
Tarballs
NTP version 4,
significant revision of the previous NTP standard; is the current development version. It is formalized by RFCs released by the IETF
Stable: 4.2.8p15
The NTP Project (ReD)
2020/06/23
Dev: 4.3.99
The NTP Project conducts Research and Development in NTP and produces the Official Reference Implementation of NTP along with the Implementation Documentation: Background
2019/06/07
information about NTP; along with briefings and
bibliography;
are available at the Network Time Synchronization Project Page:
RSS
The NTP Public Services Project
46vs
RerD 
The NTP Public Services Project provides resources for the NTP software available here; which is the Official Reference Implementation of NTP The available resources include:
Community_ Supported Documentation
Issue / Bug Reporting
and
'public