Python Powershell Windows Firewall Issue

[Mr Technician]

As part of a project I'm working on, I need a python script to be able to send data through the network to a receiving server script on another computer. Currently, when the client script attempts to send the keypress to the server, a "ConnectionAbortedError: [WinError 10053] An established connection was aborted by the software in your host machine" error occurs. I know this is the firewall but it's not like I have a program that can be added to the firewall to allow the connection. I must admit I am very new to working with powershell so help would be appreciated.

[HunterAP]

I just want clear up something: you say you're sending data and then saying you're sending a keypress to the secondary machine, are you trying to remotely access the secondary machine from your first machine?

 

Are you setting up a TCP connection between both machines? Is the server set up to sit in a "waiting" loop until instructions are received? Is the data sent by the client to the server actually readable by the server (as in, did you set the server to correctly receive the data?)

 

I did this kind of stuff in C/C++, and for the most part this is all that's needed. If you're trying to send an actual keypress to the server, and thus make the server register a keypress on the keyboard, then this might need more work to actually do that.

[Mr Technician]

1 hour ago, HunterAP said:

I just want clear up something: you say you're sending data and then saying you're sending a keypress to the secondary machine, are you trying to remotely access the secondary machine from your first machine?

 

Are you setting up a TCP connection between both machines? Is the server set up to sit in a "waiting" loop until instructions are received? Is the data sent by the client to the server actually readable by the server (as in, did you set the server to correctly receive the data?)

 

I did this kind of stuff in C/C++, and for the most part this is all that's needed. If you're trying to send an actual keypress to the server, and thus make the server register a keypress on the keyboard, then this might need more work to actually do that.

I'll give some more details. My uncle and I are currently working on a join project so he wrote this code (though I generally understand what it's doing). My task is to port this python code to a C# console app. The server will wait to accept the data sent from the client, at least in theory.

 

Server:

Spoiler

#!/usr/bin/python           # This is server.py file

import socket               # Import socket module

s = socket.socket()         # Create a socket object
host = socket.gethostname() # Get local machine name
port = 12345                # Reserve a port for your service.
s.bind((host, port))        # Bind to the port

test = ''

s.listen(5)                 # Now wait for client connection.
c, addr = s.accept()
while test != b'q':
   test = c.recv(1024)
   print(test)
c.close()                # Close the connection

Client:

Spoiler

#!/usr/bin/python           # This is client.py file

import socket               # Import socket module
import sys
import msvcrt

s = socket.socket()         # Create a socket object
host = socket.gethostname() # Get local machine name
port = 12345               # Reserve a port for your service.
if len(sys.argv) > 1:
    port = int(sys.argv[1])

s.connect((host, port))
test = ''
while test != b'q':
        test = msvcrt.getch()
        s.send(test)
s.close                     # Close the socket when done

 

[HunterAP]

I don't believe you need to reserve the port on the client program, that's something you only do on the server program, where the client then sends a connection request to that IP address and port.

 

According to the Python docs page for the Socket module, your uncle should've done something like this is in his python client program:

def mysend(self, msg):
        totalsent = 0
        while totalsent < MSGLEN:
            sent = self.sock.send(msg[totalsent:])
            if sent == 0:
                raise RuntimeError("socket connection broken")
            totalsent = totalsent + sent

As for C#, I would recommend looking at these documents that show how to implement a socket connection between a client and a server.

• The Microsoft Socket documentation page
• Microsoft's Examples
• More examples from InfoWorld.com