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.

Please see the NTP Security Notice for vulnerability and mitigation details.

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Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.

Linux implementation (LinuxPPS)

If you wish using a PPS (Pulse Per Second) source on your GNU/Linux system you may try using my implementation. :)

It was developed for Linux 2.4 series but recently I decide to drop 2.4 series and support only 2.6 series.

All documentation is at https://wiki.enneenne.com/index.php/LinuxPPS_support and the code is at https://gitweb.enneenne.com/?p=linuxpps;a=summary and is updated to Linux-2.6.17-rc5.

You can find also an old and deprecated version of the softyware at https://ftp.enneenne.com/pub/projects/linuxpps/ but you are warned in using that code.

Currently there is a mail list on LinuxPPS where you can find other people interested into the project.

-- RodolfoGiometti - 27 May 2006