1. Authentication port: 18 12. Mainly used for user authentication, for example, in a wireless network, users need to be authenticated when connecting to the wireless network.

2. Charging port: 18 13. It is mainly used to record users' network usage, such as recording users' online time, traffic and other information.

3. UDP ports used by 3.RADIUS protocol: 1645 and 18 12. Both ports are authentication ports of RADIUS protocol, but different port numbers can be used in different environments.

It should be noted that these port numbers are just common port numbers, which can be customized according to needs in practical applications. In addition, when using RADIUS protocol, we also need to pay attention to network security, such as encrypting transmission and preventing man-in-the-middle attacks.

If you want to pass RADIUS authentication for two-factor authentication or wired wireless network authentication, you can look at these.