Question

For this assessment, you will create a simple Python port scanner using Python's built-in functions. You can use Python's default editor IDLE (Integrated Development and Learning Environment) or a Python editor of your choice to complete this assessment.

1. Write a simple port scanner program using the built-in Socket module. Test your port scanner by targeting https://www.hackthissite.org
2. Test your code and document testing by taking screenshots.
3. Explain the approach taken to complete this assessment and the major decisions made.

Here is the code someone sent me however I get an error in my shell console when running.

import socket

def port_scanner():
    # inclusive range 1 to 1024
    for port in range(1, 1024 + 1):
        socket_obj = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        result = socket_obj.connect_ex(("localhost", port))
        # checking for open port
        if result is None:
            print("Port ", port, "open")

        socket_obj.close()

port_scanner()

Answer 1

CODE:

import socket
import sys
# Ask for hostname
host = raw_input("Enter a remote host to scan: ")
host_IP = socket.gethostbyname(remoteServer)

print "Please wait, scanning host", remoteServerIP

# Scan all the ports from 1 t0 1024

try:
for port_no in range(1,1025):
s= socket.socket(socket.AF_INET, socket.SOCK_STREAM)
r = sock.connect_ex((remoteServerIP, port_no))
if r == 0:
print "Port {}:    Open".format(port_no)
s.close()

except socket.gaierror:
print 'Hostname can't be found.'
sys.exit()

except socket.error:
print "Couldn't connect to server"
sys.exit()

NOTE : When it asks for input,input the desired host address and it will show you the port numbers open in your system.Please run it on LINUX based system.