by Aaron Koolen-Bourke » Sep 18 13 10:33 am
Hi. This should be very simple by using Web Access Rules.
Go to Web Access Control -> Access Rules
Add Rule
Chose "Deny" as the rule result
Fill out the parameters as you step through the wizard, specifically the "What" section. Add a site called facebook.com here.
Now, when a user browses to Facebook, it should be blocked and you will see the Hit Count increase in the Access Rules panel.
Let me know if you have any other questions.
Aaron