Logout/deauthenticate via URL? External custom Captive Portal

[samuel_morgan]

I am making custom captive portal for my network. I managed to work everything I needed except logout. I want to create a button with logout, but I don't know which URL with which query parameters should I use?

I managed to save "magic" query parameter to cookies(or local browser storage) so far I tried:

https://my-capive-portal-url.com:1003/test.php?logout&magic=<users_magic_string>

http://my-capive-portal-url.com:1000/test.php?logout&magic=<users_magic_string>

https://my-capive-portal-url.com:1003/test.php?logout

http://my-capive-portal-url.com:1000/test.php?logout

and all options mentioned here:

https://community.fortinet.com/t5/Support-Forum/Logout-deauthenticate-via-URL-Captive-Portal/m-p/103...

like:

my-capive-portal-url.com/test.php?logout&<users_magic_string>">logout

my-capive-portal-url.com/test.php?logout

[ebilcari]

Maybe this is not the answer you are expecting but I think that this option is not feasible. After the user is logged in the portal it will get redirect to a page in internet and continue browsing. The user technically will loose access to the portal and basically even if they have the will to do logout they can't do it.