Check manual page of tcp_conn_stats

Number of TCP Connections per State

Included in	All Checkmk editions
Source Code License	Open Source
Supported Agents	Linux

This check monitors the number of TCP connections in the various possible states, which are: ESTABLISHED, SYN_SENT, SYN_RECV, LAST_ACK, CLOSE_WAIT, TIME_WAIT, CLOSED, CLOSING, FIN_WAIT1, FIN_WAIT2.

Discovery

One service is created if there is at least one TCP connection. On agents supporting tcp_conn_stats this should always be the case since at least the connection to the agent should be shown.