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Accepted
Josep Giner
Asked: 2022-03-14 02:07:21 +0800 CST 2022-03-14 02:07:21 +0800 CST

I get a port scanner error using an IP range

  • 772

I have a problem with my python script. When doing a port scanner through an IP range, the range works fine for me, but it doesn't do a scan for each IP and I don't know what's wrong with it. Can someone tell me what's wrong. I've been trying for a few days, but I can't.

The error that comes out is:

Traceback (most recent call last): 
File "C:\Users\josep\PycharmProjects\pythonProject2\main.py", 
line 11, in result=hola.connect_ex((ip,port)) 
socket.gaierror: [Errno 11001] getaddrinfo failed

Here is the code I have.

import socket
ip=input("Introduce solo 3 octetos ")
for port in range(80,90):
    for i in range(1, 11):
        print(f"{ip}.{i}")
    hola=socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
    result=hola.connect_ex((ip,port))

    if result == 0:
        print(f"Disponible -> %s:%s" % (ip, port) + "\n")
    else:
        print(f"Puerto {port} no abierto \n")
        hola.close()
python

1 Answers

  1. Best Answer

    You must specify the full address, 4 octets, in

    result=hola.connect_ex((ip,port))

    There you are passing only the three octets that the user entered.

    It is also poorly indented; You make the connection once per port, not per (address, port).

    The correct code is:

    import socket

ip=input("Introduce solo 3 octetos ")

for port in range(80,90):
    for i in range(1, 11):
        direccion = f"{ip}.{i}"
        print(direccion)
        hola=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        result=hola.connect_ex((direccion,port))

        if result == 0:
            print(f"Disponible -> %s:%s" % (direccion, port) + "\n")
        else:
            print(f"Puerto {port} no abierto \n")
        hola.close()

    produces:

    Introduce solo 3 octetos 172.16.0
172.16.0.1
Disponible -> 172.16.0.1:80

172.16.0.2
Disponible -> 172.16.0.2:80

172.16.0.3
Puerto 80 no abierto 


... etc, etc, etc
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