How to write a port scanner listening for 'ACK' in python?

Question

please can anyone help me with the port scanner program to scan ports on the IP address provided,for ACK. i want to know the technique used to scan for ACK & use multi-threading so please help me in that perspective.

Thank you

Answer 1

Just a heads-up - Windows XP SP2 and later disable raw sockets, so you won't be able to scan for TCP ACK messages specifically on Windows. Since an ACK message is the last message in establishing a TCP connection, you can implicitly detect the ACK message by attempting to establish a connection with a simple socket.connect call (if it connects, you've sent your ACK).

If you want to see an example of a multithreaded port scanner that I wrote, see inet.py and scanner.py in jaraco.net.

Answer 2

this is a multi-threaded port scanner i wrote

http://appusajeev.wordpress.com/2009/08/13/optimized-port-scanner-with-threading/

theres no way to track ACKs though.