pfsense-nagios-checks/check_pf_ipsec_tunnel

#!/bin/sh
#

if [ "$1" = "-e" ] && [ ! -z "$2" ]; then

exitstatus=2 #default

endpoint=$2
name_instead=$4

regex="\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b"

IPTEST=$(echo $endpoint | egrep $regex)
if [ "$?" -eq 0 ]
then
        result=$(/usr/local/sbin/ipsec statusall | grep 'ESTABLISHED' | grep $endpoint | cut -d":" -f2 | cut -d "," -f1 | sed -e 's/^[ \t]*//')||exit 3
else
        hostip=$(dig +short $endpoint)
        result=$(/usr/local/sbin/ipsec statusall | grep 'ESTABLISHED' | grep $hostip | cut -d":" -f2 | cut -d "," -f1 | sed -e 's/^[ \t]*//')||exit 3
fi

if [ "$name_instead" != "" ]
  then
    endpoint=$name_instead
fi

if [ "$result" != "" ]
  then
    echo "OK - IPSEC VPN tunnel to $endpoint - $result"
    exitstatus=0
else
    echo "CRITICAL - IPSEC VPN tunnel not found: $endpoint"
    exitstatus=2
fi

#echo "exit: $exitstatus"
exit $exitstatus

else
        echo "check_pf_ipsec_tunnel.sh - Nagios Plugin for checking IPSEC tunnel status on pfSense "
        echo ""
        echo "Usage:    check_pf_ipsec_tunnel.sh -e <remote gateway> [-name instead of IP address]"
        echo "Note:     must be the same IP or hostname used in IPSEC config"
	echo "Example:  check_pf_ipsec_tunnel.sh -e 4.4.4.4 -name Google"
        exit 3
fi