On Sun, Nov 5, 2017 at 2:31 AM, brandon wallace <nodn...@gmx.us> wrote: > > I have this code that tests a server to see if it is listening on port 123 > runs and evaluates to True every time. Even if the server does not exist but > it is not supposed to do that. I am getting no error message at all. What is > going on with this code? > > > > #!/usr/bin/env python > > import socket > > hostname = ["192.168.1.22", "192.168.1.23", "200.168.1.24", "19.0.0.0"] > port = 123 > > def check_udp(hosts, port_num): > '''Test the UDP port on a remove server.''' > s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) > for host in hosts: > try: > s.connect((host, port_num)) > return "Port 53 is reachable on: %s" % host > except socket.error as e: > return "Error on connect: %s" % e > > check_udp(hostname, port)
Do you understand what it actually means to connect a UDP socket? If not, I suggest reading up on the nature of UDP. You can't probe a remote server this way; it simply doesn't work like that. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
