Python Penetration Testing Essentials - Second Edition

How to create an efficient port scanner

I have stated some points that should be taken into account for a good port scanner:

• Multithreading should be used for high performance
• The socket.setdefaulttimeout(1) method should be set according to the situation
• The port scanner should have the ability to take host names as well as domain names
• The port should provide the service name with the port number
• The total time should be taken into account for port scanning
• To scan ports 0 to 65535, the time taken should be around 3 minutes

So now I have written my port scanner, which I usually use for port scanning:

from threading import Threadimport timeimport socketfrom datetime import datetimeimport cPickle'''Section1'''pickle_file = open("port_description.dat",'r') ...