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 ConfiguringAtomRefclocksDev for discussion of this topic.
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.
6.1.1. Configuring ATOM (PPS) Refclocks
The ATOM refclock is built by default. Building is enabled/disabled by the option --enable-ATOM or --disable-ATOM in the 'configure' command line, for example: ./configure --enable-ATOM
The driver will look for the PPS signal on
is the unit number (0-4) on the
line in your
Note that some refclocks have builtin support for a PPS signal and do not currently use the ATOM driver. See Bug #557
for more information.
Note that the current kernel-mode Windows PPS driver (serialPPS.sys download
) does not support inverted polarity on the DCD line - it must be asserted (positive going) on the leading edge of the second.
Related Topics: AtomRefclockUsers