Клиент-серверное приложение, работающее с числами

Traceback (most recent call last):File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python37\client1.py", line 6, in <module> client_socket.connect(('192.168.1.43', 5000)) ConnectionRefusedError: [WinError 10061] Подключение не установлено, т.к. конечный компьютер отверг запрос на подключение

import socket
import json
 
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 
server_socket.bind(('192.168.1.43', 5000))
 
server_socket.listen(5)
print("Server listenning for connections")
 
client1, addr = server_socket.accept()
client2, addr = server_socket.accept()
client3, addr = server_socket.accept()
print("Connected with addr1, addr2 and addr3")
 
number1 = client1.recv(1024).decode()
number2 = client2.recv(1024).decode()
print("Received numbers from clients number1 and number2")
 
client3.send(str(number1).encode())
client3.send(str(number2).encode())
print("Numbers sent to client3")
 
#client1.close()
#client2.close()
#client3.close()
#server_socket.close()

import socket
import json
 
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 
client_socket.connect(('192.168.1.43', 5000))
 
number1 = input("Enter a first number: ")
client_socket.send(str(number1).encode())
print("Number1 sent to server")
 
#client_socket.close()

import socket
import json
 
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 
client_socket.connect(('192.168.1.43', 5000))
 
number2 = input("Enter a second number: ")
client_socket.send(str(number2).encode())
print("Number2 sent to server")
 
#client_socket.close()

import socket
import json
 
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 
client_socket.connect(('192.168.1.43', 5000))
 
number1 = client_socket.recv(1024).decode()
number2 = client_socket.recv(1024).decode()
print("Received numbers from server number1 and number2")
 
result = int(number1) + int(number2)
print("Received numbers addition")
 
with open('result.json', 'w') as file:
    json.dump(result, file)
 
#client_socket.close()