Thunder's minefield registration and landing use 5200 and 6200.

4000 port opened by QQ client.

The port used by QQ server is 8000

The port of HTTP is 80, which is used for web browsing.

Telnet port 23 for remote login.

The FTP server opens port 2 1 for uploading and downloading.

Port 25 opened by SMTP server for sending mail.

POP3 server opens 109 port to receive mail.