Werk #22577: netstat: ignore lines without addresses

Component	Checks & agents
Title	netstat: ignore lines without addresses
Date	Oct 5, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	3.0.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0p16 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p38 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

If the netstat agent section contained a line that is not a network connection, for example the text "No updates pending for installation" from another agent plug-in, the "TCP Connection" services crashed with TypeError: SplitIP.__init__() missing 1 required positional argument: 'port'.

Lines whose addresses carry no port are now ignored, and the connections of the host are evaluated as usual.

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