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)
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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Question
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 ()](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F81d5a591-96a7-4a6a-a47c-fa9f84ec13d3%2F04f2cc89-f740-40d0-9ed0-be0f8d823b61%2Fufrthya_processed.png&w=3840&q=75)
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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