[Unit] Description=PTP: Boundary/Ordinary Clock [Service] # added automatically, for details please see # https://en.opensuse.org/openSUSE:Security_Features#Systemd_hardening_effort ProtectSystem=full ProtectHome=true PrivateDevices=true ProtectHostname=true ProtectKernelTunables=true ProtectKernelModules=true ProtectKernelLogs=true ProtectControlGroups=true RestrictRealtime=true DeviceAllow=/dev/rtc # end of automatic additions Type=simple EnvironmentFile=-/etc/sysconfig/ptp4l ExecStart=/usr/sbin/ptp4l $OPTIONS [Install] WantedBy=multi-user.target