I: Security --> Access Control page
Example: Filter and block MSN usage.
For example, a company does not wish to allow employees to use MSN. The system administrator can set up an ACL action: rejecting the traffic going out to External IP Range at 207.46.110.*/24.
II: Security --> Web Filtering
Example: Block a URL with Keyword
Step 1: [Web Filtering]: mark "enable".
Step 2: If one need to block Facebook related web page, can follow the settings as below.