При включенном ntpd на CentOS 7 после перезагрузки демон не запускается.
Проблема — в chronyd.
Лог:
[root@HOSTNAME ~]# grep NTP /var/log/messages Nov 17 09:23:29 HOSTNAME systemd: Starting NTP client/server... Nov 17 09:23:30 HOSTNAME systemd: Started NTP client/server. Nov 17 09:24:11 HOSTNAME chronyd[689]: NTP packet received from unauthorised host other_HOST_IP port 123 Nov 17 09:25:18 HOSTNAME chronyd[689]: NTP packet received from unauthorised host other_HOST_IP port 123 Nov 17 09:34:21 HOSTNAME systemd: Stopping NTP client/server... Nov 17 09:34:21 HOSTNAME systemd: Stopped NTP client/server.
Решение:
# yum remove chrony