扫描已经使用的端口

scan_port.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
import socket

def scan_port(port_num, host):
  s = socket.socket()
  socket.setdefaulttimeout(2)
  try:
      s = s.connect((host, port_num))
      print port_num, "[+] has used"

  except Exception, e:
      pass


if __name__ == '__main__':
    try:
        max_port_numbers = int(sys.argv[1])
    except IndexError:
        max_port_numbers = 65536

    max_port_numbers = max_port_numbers if max_port_numbers <= 65536 else 65536

    host = 'localhost'
    for i in xrange(max_port_numbers):
        scan_port(i, host)