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.
ntp-4.2.8p15
was released on 23 June 2020. It addresses 1 medium-severity security issue in ntpd, and provides 13 non-security bugfixes over 4.2.8p13.
Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.
The NTP Project
The NTP Project produces a reference implementation of the NTP protocol, and implementation documentation, through a largely a volunteer effort. The NTP software distribution is copyrighted, as described in the
NTP copyright page.
A list of reference clocks, ntp documentation, time and frequency standard stations, and time and frequency standard station transmission data is maintained at the
Information on Time and Frequency Services page. Background information about NTP, along with briefings and a bibliography, are available at the
Network Time Synchronization Project page.