Fortinet FortiGate 1U Quick Start Manual page 151

Method 1
Creating a ratings override
Go to Security Profiles > Web Filter >
Rating Overrides.
Create a new override and enter the URL
fortinet.com. Select Lookup Rating to see
its current FortiGuard Rating.
Set Category to Custom Categories (local
categories) and create a new Sub-Category
for blocked sites.
The sub-category has been added to the list
of FortiGuard Categories, under Local
Categories.
Using web filter overrides to control website access 131