Простой сканер портов на Python

import socket


def scan_port(ip, port):
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    if client.connect_ex((ip, port)):
        pass
    else:
        print(f"Порт {port} открыт")


ip = socket.gethostbyname("domen")
for i in range(81):
    scan_port(ip, i)