old_ScanPort.sh

#!/usr/bin/env bash
#sokdr

tput clear
trap ctrl_c INT

function ctrl_c() {
    echo "** You pressed Ctrl+C... Exiting Script;"
    exit 0;
}

ip="$1"

echo "#######################################"
echo "######### Welcome to ScanPort Script ##########"
echo

# Check if a valid IPv4 address is provided
if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]] ; then
    echo "You entered a valid IPv4 address... let's move on:"
    echo
    echo "Now checking availability of $ip"
    echo
    START=$(date +%s)

    # Ping the IP address to check if the host is up
    ping -c1 $ip >/dev/null 2>&1

    if [ "$?" = 0 ] ; then
        echo "Host seems to be up.... OK ;)"
        echo
        read -p "Do you want TCP or UDP port scan? Just press tcp/udp to continue: " answer

        if [[ $answer = tcp ]] ; then
            echo "Now starting to scan the IP address: $ip for open TCP ports"
            echo "========================================================"
            nc -vz -w 1 -n $ip 1-10000
            echo
        elif [[ $answer = udp ]]; then
            echo "Now starting to scan the IP address: $ip for open UDP ports"
            echo "========================================================"
            nc -vz -u -w 1 $ip 20-443
            echo
        else
            echo "Exiting... Run the script again and type tcp or udp"
        fi

        END=$(date +%s)
        DIFF=$(( $END - $START ))
        echo "Script completed in $DIFF seconds :"
        echo
    else
        echo "Host seems to be down.... exiting"
    fi

else
    echo "Exiting..... Enter a valid IPv4 address:"
fi

exit 0;