host port scan with netcat

scancat.sh

#!/bin/bash

if [ $# -ne 1 ]; then
        echo "Usage: port"
        exit 1
fi

local_ip=$(ifconfig | grep "inet " | tail -1 | awk -F ' ' '{print $2}')
port=$1
ips=($(fping -g $local_ip/24 2> /dev/null | grep alive | cut -d" " -f1 | sed -n '1!p'))

for ip in $ips; do
        nc -vz $ip $port 2>&1 | grep succeeded | awk -F ' ' '{print $3}'
        if [ $? -eq 0 ]; then
                echo "[+] Host $ip has port $port open!"
        fi
done

exit 0