Skip to content
Support
Troubleshooting & FAQ

Guest Wi-Fi captive-portal FAQ

Field notes for running Sign In guest Wi-Fi. The first three cover client-side behaviours that affect onboarding; the last is a support troubleshooting checklist.

iOS captive-portal detection

Why DHCP Addr. Required on the guest SSID makes the login page open reliably on iPhones and iPads.

802.11r Fast Transition

Why Fast Transition should be disabled on guest and public SSIDs, and where it belongs instead.

MAC randomization

iOS 18 / macOS 15 Private Wi-Fi Address modes and what users should set on long-term access.

Support checklist

First- and second-line triage for guest-access issues: portal, IP, disconnects, and login failures.
Section titled “Related pages”

Next

iOS captive-portal detection

Why enabling DHCP Addr. Required on the WLC guest SSID makes the Captive Network Assistant reliably open the login page on iPhones and iPads.

802.11r Fast Transition

Why 802.11r Fast Transition should be disabled on guest and public SSIDs, and enabled only on controlled WPA2/WPA3-Enterprise networks.