Python UDP Network not receiving data

Question

Computer A "sender":

import socket
UDP_IP = "computer b ip address"
UDP_PORT 5005
MESSAGE = "HELLO!"

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

while True:
    sock.sendto((bytes(MESSAGE, 'UTF-8')), (UDP_IP, UDP_PORT))

Computer B "receiver":

import socket
UDP_IP = "computer b ip address"
UDP_PORT = 5005

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind((UDP_IP, UDP_PORT)) 

while True:
    data = sock.recv(1024)
    print("received: ", data)

Observations

• I sent data successfully once but have consequently failed despite using the exact setup only moments apart.
• When I loop to send data from computer A to computer B, it disrupts my usb-headphones on computer B only when computer A is sending to the IP Address of computer B.

Can anyone give me direction in my attempt to send data between computer A and computer B using UDP?

Answer 1

Try to check telnet serverip 4000 from your machine, to check if 4000 port is reachable. If not most likely it is firewall issue as pointed by Steffen.