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.See SourcesOfTimeDev for discussion of this topic.
ntp-4.2.8p15was released on 23 June 2020. It addresses 1 medium-severity security issue in ntpd, and provides 13 non-security bugfixes over 4.2.8p13.
Please see the NTP Security Notice for vulnerability and mitigation details.Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.
ntpdis designed to be used in conjunction with one or more Remote Time Servers and / or Local Refclocks. As a special case, when your
ntpdis serving time to others, you may wish to include the Undisciplined Local Clock as a source of time. Doing so will allow your
ntpdto claim to be synchronized in the event that connectivity to your true time sources is lost.