Hey @Thomas, you can use the check_ssh plugin for monitoring ssh services.
The commands.cfg file contains a command definition for using the check_ssh plugin, which looks like this:
define command {
command_name check_ssh
command_line $USER1$/check_ssh $ARG1$ $HOSTADDRESS$
}
A simple service definition for monitoring the SSH server on remotehost would look like this:
define service {
use generic-service ; Inherit default values from a template
host_name remotehost
service_description SSH
check_command check_ssh
}