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Make a port scanner in python This is what I have so far, but I need the program to take a host as a command-line argument and the port range to scan.

Make a port scanner in python This is what I have so far, but I need the program to take a host as a command-line argument and the port range to scan.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Make a port scanner in python

This is what I have so far, but I need the program to take a host as a command-line argument and the port range to scan.

import socket import subprocess import sys # Clear Screen subprocess.call('clear', shell=True) # Ask for input remoteServer = input("Enter a remote host to scan: ") remoteServerIP = socket.gethostbyname(remoteServer) # 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 (1,1025): sock = socket.socket(socket. AF INET, socket.SOCK_STREAM) result = sock.connect_ex( (remoteServerIP, port)) if result == 0: print (remoteServer, "results") print ("Port {}: sock.close() print ("portscan complete.") Open". format(port)) 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 ()
Transcribed Image Text:import socket import subprocess import sys # Clear Screen subprocess.call('clear', shell=True) # Ask for input remoteServer = input("Enter a remote host to scan: ") remoteServerIP = socket.gethostbyname(remoteServer) # 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 (1,1025): sock = socket.socket(socket. AF INET, socket.SOCK_STREAM) result = sock.connect_ex( (remoteServerIP, port)) if result == 0: print (remoteServer, "results") print ("Port {}: sock.close() print ("portscan complete.") Open". format(port)) 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 ()
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