Question

Explain how to perform a basic network scan using Python and the socket library.

Answer 1

import socket

target = "example.com"

def scan_port(host, port):
    try:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.settimeout(1)
        sock.connect((host, port))
        sock.close()
        return True
    except (socket.timeout, ConnectionRefusedError):
        return False

for port in range(1, 1025):  # Scan common ports
    if scan_port(target, port):
        print(f"Port {port} is open")
 

This code attempts to connect to each port in the range 1 to 1024. If the connection is successful, it prints that the port is open.