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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 BCP38.
NETWORWNDATION
ntp-4.2.8p15 was released on 23 June 2020_
It addresses
medium-severity security issue in ntpd, and provides 13 other non-security fixes improvements over
4.2.8p14.
NTP Projects
R & D
Please see our NTP Security Notice page for vulnerability and mitigation details
Public Services
Welcome to ntp.org; home of the Network Time Protocol project:
Useful Links
Contributors
This page is home for the NTP Project (R&D) This web site; and all pages directly contained within; are in the public domain: Some portions of this site may be
'copyrighted by other authors. Please contact the
Developer Notes
webmaster with any questions regarding copyright: The NTP software distribution is
 copyrighted; as described in the
copyrightpage:
Issues and Bugs
RFCs
NTP is a protocol designed to synchronize the clocks of computers over a network:
Time Servers
NTP version 4
significant revision of the previous NTP standard; is the current development version: It is formalized by RECs released by the IETF
Tarballs
The NTP Project (ReD)
Stable: 4.2.8p15
2020/06/23
The NTP Project conducts Research and Development in NTP and produces the Official Reference Implementation of NTP along with the Implementation Documentation: Background information about NTP;
Dev: 4.3.99
along with briefings and a bibliography; are available at the Nerwork Time Synchronization Project Page
2019/06/07
The NTP Public Services Project
RSS
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:
RadY
Community Supported Documentation
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Public Time Server Lists
Reference Implementation Downloads
Server Pool Project
NTP