The first thing to do during authentication is to initiate authentication. There are two methods for triggering Portal authentication:
Active authentication
In this mode, a user actively accesses the Portal server for identity authentication. The user accesses the Portal authentication website through a browser, enters the IP address of the Portal server in the browser, and then enters the user name and password on the displayed web page for authentication.
Redirect authentication
In this mode, a user enters a non-authentication website address and is redirected to the Portal authentication website for authentication.