[Python] myknock.py client

[pyth0n3]

Description:

Makes port-hits by sending a TCP packet with syn flag set .

#!/usr/bin/python
#Author: pyth0n3 
#Date:19.09.2011
#Purpose:Knock client (SYN-sequence)  

from __future__ import print_function
import logging
logging.getLogger('scapy.runtime').setLevel(logging.ERROR)
import sys
import socket
try:
	from scapy.all import IP,TCP,sr1
except ImportError:
	print('[+] Need to install python-scapy first')
	print('[+] http://www.secdev.org/projects/scapy/')
	sys.exit()

def display():
	print('#'*50)
	hand = '\n# Usage: myknock.py <ip> <seq 1> <seq 2> <seq n> #\n#'
	print('#',' '*47 + '#',hand ,' '*47 +'#') 
	print('#'*50)
	sys.exit()

if len(sys.argv) < 3:
                display()


seq = sys.argv[2:]
addr = sys.argv [1]


try:
	socket.inet_aton(addr)	
except socket.error:
	print ('[+] You have entered an ilegal address')
	sys.exit()


def getinteger(n):
	try:
		return int(n)
	except ValueError:
		print ('[+] Bad sequence numbers')
		sys.exit()

ports = map(getinteger,seq)

hand = range(1,65536)
for sq in ports:
	if sq in hand:
		pass
	else:
		print('[+] Sequence out of range')
		sys.exit()

def session():
	i = IP()
	i.dst=addr
	t = TCP()
	t.dport = ports
	t.flags = 'S'
	get = sr1(i/t,timeout=1)
	print('[+] Knock done!')

if __name__ == '__main__':
	session()

Download:

wget http://sprunge.us/QNDJ -O mycknock.py