File check_mk-systemd-socket-activation.README.SUSE of Package check_mk
With the introduction of systemd and its socket activation ability
there is no need for running xinetd anymore to make the agent
available to remote manitoring machines.
To activate the agent (or the caching agent, respectively) simply
enable and start the socket provided in the supplied .service and
systemctl enable check_mk-agent.socket
systemctl start check_mk-agent.socket
(replace "check_mk-agent" with "check_mk-caching-agent", if
you use the caching agent)
The drawback of this method is that systemd does not provide the
security measures xinetd provided by its only_from directive.
Please use the provided firewall profile to create rules limiting
access to the socket.