simplePortScan.py

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

import sys, socket

if len(sys.argv)<4:
  print "\n\nusage: ./portscan.py <host> <startport> <end port>"
  print "\n Example: portscan.py www.domain.com 1 1000"
  sys.exit(0)

host=sys.argv[1]
start=sys.argv[2]
end=sys.argv[3]

for port in range (int(start),int(end)):
  try:
    #print "\n[-] Scanning port",port
    s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.settimeout(5)
    s.connect((socket.gethostbyname(host), int(port)))
    print "\n Found Open Port ",port
    s.close()
  except:
    pass