Python python scanner source code

Code
#!/usr/bin/env python

import socket

import subprocess

import sys

from datetime import datetime



# Clear the screen

subprocess.call('cls', shell=True)



# Ask for input

remoteServer    = raw_input("Enter a remote host to scan: ")

remoteServerIP  = socket.gethostbyname(remoteServer)



# Print a nice banner with information on which host we are about to scan

print "-" * 60

print "Please wait, scanning remote host", remoteServerIP

print "-" * 60



# Check what time the scan started

t1 = datetime.now()



# Using the range function to specify ports (here it will scans all ports between 1 and 1024)



# We also put in some error handling for catching errors



try:

    for port in range(1,1000):  

        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

        result = sock.connect_ex((remoteServerIP, port))

        if result == 0:

            print "Port {}:      Open".format(port)

        sock.close()



except KeyboardInterrupt:

    print "You pressed Ctrl+C"

    sys.exit()



except socket.gaierror:

    print 'Hostname could not be resolved. Exiting'

    sys.exit()



except socket.error:

    print "Couldn't connect to server"

    sys.exit()



# Check the time again

t2 = datetime.now()



# Calculate total time; subtract start time from end time

total = t2 -t1



# Print the total time on screen

print '\n'

print '-' * 60

print "Total scan time: ", total

print '-' * 60