#!/bin/bash

# Check if two arguments are provided
if [ "$#" -ne 2 ]; then
    echo "Usage: $0 <hostname or ip> <port-range>"
    exit 1
fi

hostname=$1
port_range=$2

# Split the port range into start and end
IFS='-' read -ra PORTS <<< "$port_range"
start_port=${PORTS[0]}
end_port=${PORTS[1]}

# Iterate over the port range
for ((port=start_port; port<=end_port; port++))
do
    (echo > /dev/tcp/$hostname/$port) &>/dev/null && echo "Port $port open"
done

exit 0