From the Interface Association page, you can associate a configured captive
portal with specific interfaces. The captive portal feature only runs on the
interfaces that you specify. A captive portal can have multiple interfaces
associated with it, but an interface can be associated to only one Captive
Portal at a time.
To display the Interface Association page, click System → Captive Portal →
Figure 17-18. Captive Portal Interface Association
When you associate an interface with a Captive Portal, the interface is
disabled in the Interface List. Each interface can be associated with only one
Captive Portal at a time.
Configuring a Captive Portal