HTTPS:443 people

MySQL:3306

PHP:9000

Tomcat: 8080

DHCP: The server port number is 67 and the client port number is 68.

POP3:POP3 is just a receiving protocol, and POP3 clients use SMTP to send mail to the server. The port number used by POP3 is 1 10.

SMTP: the port number is 25.

Telnet: the port number is 23

FTP:FTP uses ports 20 and 2 1. Port 20 is used for data transmission and port 2 1 is used for control signaling transmission. Control information and data can be transmitted at the same time, which is a feature of FTP. FTP uses TCP connection.

TFTP: Port number 69, using UDP connection.

DNS:53, name service

NetBIOS: 137, 138, 139, in which 137 and 138 are UDP ports, which are used when transmitting files through online neighbors. And port 139: enter through this port.

QQ: Use 8000 (server) and 4000 (client) ports.