No, I can't manage it to work properly
First of all, what user cjoseph linked it's not related, since it's point to cloud4wi service, which I don't have (you have to pay to get it)
What I did :
I've added facebook domains under walled garden whitelist, and blocked everything else with "*", but in this way it's blocking everything (captive portal it's not working anymore), but not 443, so it's not useful .
Please note also that a lot of smartphones apps are using 443 to exchange data, so , for example, not only 443 website but also whatsapp is always working.
So I tried to assing a pre-auth role :
Under my SSID, section 4, restriction :
Based on roles : Allow access for every destination
Preauth role : Access Control -> any -> Deny -> Every Destination
But 443 it's always working, even if I don't authenticate ! Youtube, Google, Whatspp and so on are perfectly working, and they shouldn't.
Surely I'm doing something wrong, please help me understand what.
My firmware version is 6.4.2.6-4.1.1.11_52666