You can select specific types of websites to block during different times of the day by selecting Custom.
The Configure Policy: <group name> screen appears.
A new screen appears.
Enable URL Filtering
High: Blocks known or potential security threats, inappropriate or possibly offensive content, content that can affect productivity or bandwidth, and unrated pages
Medium: Blocks known security threats and inappropriate content
Low: Blocks known security threats
Custom: Select your own categories, and whether you want to block the categories during business hours or leisure hours.
Filter Rules: Select entire categories or sub-categories to block.
Business Hours: Any days or hours that are not defined under Business Hours are considered Leisure hours.