Enabling portal authentication on an interface

You must first enable portal authentication on an access interface before it can perform portal authentication for connected clients.

When a portal-enabled interface receives a portal packet, it checks the source IP address of the packet. If the packet matches a locally configured portal authentication server, the interface regards the packet valid and sends an authentication response packet to the portal authentication server. Otherwise, the interface drops the packet. After a user logs in to the device, the user interacts with the portal authentication server as needed.