title: Established TCP Connections or TCP/UDP Listeners
agents: linux, aix
catalog: os/networking
license: GPL
distribution: check_mk
description:
  This check evaluates the output of the {netstat} command on Linux and AIX
  and checks if there are established connections or listeners matching a
  given criteria.

  The check returns {OK} state if the specified connection/listener is present,
  and {CRIT} if not.

  This check needs the agent plugin {netstat.linux} or {netstat.aix} to
  be installed.

item:
  A user defined identifier of the connection.
