Support for External captive portal Php authentication (WBE750)

Support for the ability to use External captive portal Php authentication using your own php code to authenticate clients on a simple click through external portal examples could be posted to sites like Github to allow admins to apply their own pages instead of the built in ones, as I'm aware Meraki Go already do this

WBE750

This is my set up

NOTE: I had to enter X4200 WiFi 6 Access Point (WAX220PA) because the WBE750 WIFI 7 Access Point isn't in the list