Restrictions and guidelines for configuring local portal service features
For an interface to use the local portal service, the URL of the portal Web server specified for the interface must meet the following requirements:
The IP address in the URL must be the IP address of a Layer 3 interface (except 127.0.0.1) on the device, and the IP address must be reachable to portal clients.
The URL must be ended with /portal/. For example: http://1.1.1.1/portal/.
The device provides a default authentication page file. To use customized authentication pages, you must edit the authentication pages, compress them to a file, and then upload the file to the device. On the device, specify the file as the default authentication page file.