Linux Nagios Different Port

Goal

The gateway server also runs services that need to be monitored with Nagios. So we use another port to forward this to another server.

Server side: commands.cgi

Changed the file /etc/nagios-plugins/config/check_nrpe.cfg. Added a alternative command.

# nrpe on alternate port
define command {
        command_name    check_nrpe_alt
        command_line    /usr/lib/nagios/plugins/check_nrpe -H $HOSTADDRESS$ -p 15666 -c $ARG1$ -a $ARG2$
}

Client side: nrpe

Easy, just change the nrpe config at /etc/nagios/nrpe.cfg

# PORT NUMBER
# Port number we should wait for connections on.
# NOTE: This must be a non-priviledged port (i.e. > 1024).
# NOTE: This option is ignored if NRPE is running under either inetd or xinetd

server_port=15666