You can check which ports are open on your own computer or server.
import socket
target = "127.0.0.1"
ports = [21, 22, 80, 443]
for port in ports:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
result = s.connect_ex((target, port))
if result == 0:
print(f"Port {port} is open")
else:
print(f"Port {port} is closed")
s.close()
⚠️ Only scan your own devices or test servers.
Next Lesson →