Chapter 15 Unified Threat Management for FortiOS 5.0 : Web filter : Overriding FortiGuard website categorization
  
Overriding FortiGuard website categorization
In most things there is an exception to the rule. When it comes to the rules about who is allowed to go to which websites in spite of the rules or in this case, policies, it seems that there are more exceptions than to most rules. There are numerous valid reasons and scenarios for exceptions so it follows that there needs to be a way to accommodate this exceptions.