Monitor ssh on non-default port with Nagios
In ssh pluging config /etc/nagios-plugins/config/ssh.cfg, there an alias named check_ssh_port. if it not existe you may define it like above:
$ cat >> /etc/nagios-plugins/config/ssh.cfg
define command{
command_name check_ssh_port
command_line /usr/lib/nagios/plugins/check_ssh -p '$ARG1$' '$HOSTADDRESS$'
}
in the service file /etc/nagios3/conf.d/services_nagios2.cfg, define you ssh service to monitor like this:
define service {
hostgroup_name ssh2-servers
service_description SSH2
check_command check_ssh_port!12000!server
use generic-service
notification_interval 240 ; set > 0 if you want to be renotified
}
replace 12000 by you default ssh port and server by your target.
host:~$ /usr/lib/nagios/plugins/check_ssh --help
check_ssh v1991 (nagios-plugins 1.4.12)
Copyright (c) 1999 Remi Paulmier <[email protected]>
Copyright (c) 2000-2007 Nagios Plugin Development Team
<[email protected]>
Try to connect to an SSH server at specified server and port
Usage:check_ssh [-46] [-t <timeout>] [-r <remote version>] [-p <port>] <host>
does this answer your question? -p parameter lets you specify the port, make custom check in /etc/nagios/nrpe.cfg and put there:
command[check_remote_ssh]= /usr/lib/nagios/plugins/check_ssh -p 1234 some.host
As none of the solutions above worked for me, I'll post this small variation.
This definition is the default one (e.g.: localhost.cfg
) with the only addition of the -p option and the space in between.
I guess it's a hybrid version of two of the solutions given.
It works on Nagios Core 4 with nagios-plugins 2.1.1
define service{
use local-service ; Name of service template to use
host_name localhost
service_description SSH
check_command check_ssh!-p 12345
notifications_enabled 1
}