nagios check to make sure ssh is not accessible

gistfile1.txt

#!/bin/bash

##
## Checks that ssh on a host is not accessible.
##

/usr/lib/nagios/plugins/check_ssh -t 5 $1
FOO=$?

# a non-zero output means that it failed, which is what we want
if [ "$FOO" == "0" ]; then
  echo "CRITICAL - ssh is accessible, it should not be."
  exit 1
else
  echo "SSHDOWN OK - ssh seems down, yay."
  exit 0
fi