pfSense » pfSense Packages

# Tested on Python 3.9

import time

import socket

import urllib3

from urllib3.exceptions import SSLError

from urllib3.util import ssl_

# hostname to query

hostname = "eu-irl-00001.s3.dualstack.eu-west-1.amazonaws.com"

#hostname = "res.cdn.office.net"

#hostname = "uk.ng.msg.teams.microsoft.com"

#hostname = "gspe79-ssl.ls.apple.com"

ip_address = socket.gethostbyname(hostname)

print(f"Resolved hostname {hostname} to {ip_address}. This will be used for all further requests to simulate an application internally caching the resolved IP address.")

print()

# Create a new SSL context with the correct SNI

ssl_context = ssl_.create_urllib3_context()

ssl_context.load_default_certs()

while True:

    # Resolve all IP addresses

    ip_addresses = set([info[4][0] for info in socket.getaddrinfo(hostname, None)])

    print(f"All currently resolved IP addresses for hostname {hostname}: {ip_addresses}")

    print(f"Sending request to originally resolved IP address: {ip_address}")

    print()

    # Create a connection pool

    http = urllib3.HTTPSConnectionPool(

        ip_address, 

        port=443, 

        ssl_context=ssl_context, 

        server_hostname=hostname,

        assert_hostname=hostname,

    )

    try:

        response = http.request('GET', '/', retries=False)

        print(f"HTTP response code: {response.status}")

        print("HTTP response headers:")

        for header, value in response.headers.items():

            print(f"{header}: {value}")

    except SSLError as e:

        print(f"An SSL error occurred: {e}")

    except Exception as e:

        print(f"An error occurred: {e}")

    time.sleep(25)

    print()