Hi friend!
Configuring Built-in portal authentication for local users.
The configuration roadmap is as follows:
Select WLAN Wizard to configure WLAN services on the FAT AP. On the web platform, the HTTPS service is enabled and an SSL policy is applied. When configuring a built-in Portal server, configure the same SSL policy for the built-in Portal server.
Configure a DNS server address in the DHCP address pool of the service VLAN to provide the DNS service for the STA.
Specify network resources accessible to authentication-free users.
Complete service verification.
You can refer to the link
https://support.huawei.com/enterprise/en/doc/EDOC1100008298/935606edHope to help you!