Ive setup hotspot with radius and as able to block certain websites, the thing that I need to do right now is to block all websites (which is what I can do) and allow certain websites. To block all websites,i just entered *.* on DST host and I was successful in blocking everything, on web proxy, I tried to add the websites that I want to be accessed but it didnt work, any other suggestions?

If am not mistaken, all the rules which allow access to the permitted sites should all be BEFORE the last rule which denies access to everything else.
That's in: IP > Web proxy > Add , then you add all of the allowed sites first (in Dst. Host), after that you creat the rule which denies access to everything else (using *.* on Dst. Host, with Action: deny).

Let me know if that helps.
Goodluck.

thanks, that worked for me!!

Glad it helped.
best of luck