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This manual will show you some options to monitor tcp/udp ports with Checkmk.

LAST TESTED ON CHECKMK 2.2.0P1

Active checks

We do provide some active checks to monitor the functionality of applications like DNS/HTML: https://docs.checkmk.com/latest/en/active_checks.html

Agent Plugin "Established TCP/UDP connections."

We do provide a netstat plugin collecting the network statistics. To configure the plugin, you have two ways:

  • Manual

    • Copy the corresponding plugin to the monitored host as described here: https://docs.checkmk.com/latest/en/agent_linux.html#manualplugins

      ./share/check_mk/agents/plugins/netstat.solaris
./share/check_mk/agents/plugins/netstat.aix
./share/check_mk/agents/plugins/netstat.linux
./share/check_mk/agents/windows/plugins/netstat_an.bat
  • Bakery

    • Setup → Agents → Windows, Linux, Solaris, AIX → Agent rules → Established TCP/UDP connections → New rule: Established TCP/UDP connections

      .

  • Now you will need to configure the corresponding service rule. In that case, it's an enforced service.

    • Setup → Services → Enforced services → Monitor specific TCP/UDP connections and listeners → New rule: Monitor specific TCP/UDP connections and listeners

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