check_connections

Project Notes

Check established conenctions using netstat.
Requires the Nagios::Plugin module and netstat binary.

Provides performance data about established connections, listeners and connections in wait_close state.

Update 1:
Added a windows version.

I've also provided a nagiosgraph map config:
# Connections (Linux)
# established=8;; waiting=0;; listeners=4;;
/perfdata:.*established=([.0-9]+).*swaiting=([.0-9]+).*slisteners=([.0-9]+)./
and push @s, [ 'connections',
[ 'established', GAUGE, $1 ],
[ 'waiting', GAUGE, $2 ],
[ 'listeners', GAUGE, $3 ] ];