nagios-plugins/misc/nagios_autodiscover

#!/bin/bash


IPS=`fping -a -g $1 2>/dev/null`
if [ $? -gt 2 ]; then
	echo failed to run fping
	exit 1
fi

#addgroup --group misc --alias "Misc hosts"

check_port() {
	hostname=$1
	port=$2
	check_tcp -H $hostname -p $port > /dev/null 2>&1
	if [ $? -eq 0 ]; then
		return 0
	fi
	return 1
}

is_windows() {
	hostname=$1
	check_port $hostname 3389 > /dev/null 2>&1
	return $?
}

is_linux() {
	hostname=$1
	check_port $hostname 22
	return $?
}


for ip in $IPS; do
	
	# Check if ip is just fping garbage output
	echo $ip | grep -Eq '\[|\]' 
	if [ $? -eq 0 ]; then
		continue
	fi
	# Check if this host already exists

	grep -qw "$ip" /var/log/nagios/objects.cache > /dev/null 2>&1
	if [ $? -eq 0 ]; then
		continue
	fi
	RES=`host $ip`
	if [ $? -gt 0 ]; then
		HOSTN=$ip
	else
		HOSTN=`echo $RES | head -n 1 | sed 's/.*name pointer //' | sed 's/\.$//'`
	fi
	echo $ip = $HOSTN `is_windows $HOSTN` `is_linux $HOSTN`
	#addhost --host $HOSTN --ip $ip --group misc --templates autodiscover
done