/usr/share/check_mk/checks-man/netstat is in check-mk-server 1.2.8p16-1ubuntu0.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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_an.bat} to be installed.
item:
A user defined identifier of the connection.
examples:
# Make sure that a connection from 192.168.0.1 is established
# to the host winsrv1 (192.168.0.2) on port 445:
checks += [
( 'winsrv1', 'win_netstat', 'My Test Connection',
{
'local_ip' : '192.168.0.2',
'local_port': 445,
'remote_ip' : '192.168.0.1',
'state' : 'ESTABLISHED',
'proto' : 'TCP'
}
),
]
# Check if TCP port 80 is listening
checks += [
( 'websrv1', 'win_netstat', 'HTTP Listener',
{
'local_port': 80,
'state' : 'LISTEN',
'proto' : 'TCP'
},
),
]
[parameters]
parameters (dict): A dictionary with the following keys, all of which are
optional.
{"local_ip"} The local IP address of the connection. For listeners
this is the IP address the process listens on. Applications that
listen on all IP address use an asterisk {*} here. If you omit
this parameter then any local address matches (no matter if the
listener is bound to * or to a specific interface or IP).
{"local_port"} The local port of the connection. For listeners
this is the port the process listens on.
{"remote_ip"} The remote IP address of the connection. You need
to specify this only when monitoring connections. Omit if monitoring
listeners.
{"remote_port"} The remote port of the connection. You need
to specify this only when monitoring connections. Omit if monitoring
listeners.
{"proto"} {TCP} or {UDP} are possible values:
The protocol used for the connection or the listener.
{"state"} {"ESTABLISHED"}, {"LISTENING"}, {"TIME_WAIT"}, {"SYN_SENT"}, {"SYN_RECV"},
{"LAST_ACK"}, {"CLOSE_WAIT"}, {"TIME_WAIT"}, {"CLOSED"}, {"CLOSING"}, {"FIN_WAIT1"}, {"FIN_WAIT2"},
or {"BOUND"}: The expected state of the TCP/UDP socket. You most probably will use either
{"ESTABLISHED"} or {"LISTENING"}.
{"min_states"} Tuple(warn, crit) The minimum allowed entries of the required state
{"max_states"} Tuple(warn, crit) The maximum allowed entries of the required state
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