Cisco Cisco Web Security Appliance S360 User Guide

The Web Security appliance generates high-level reports, allowing you to understand what is happening 
on the network and also allowing you to view traffic details for a particular domain, user, or category. 
You can run reports to view an interactive display of system activity over a specific period of time, or 
you can schedule reports and run them at regular intervals. 

When you enable authentication, reports list users by their usernames when they authenticate with the 
Web Proxy. By default, usernames are written as they appear in the authentication server. However, you 
can choose to make usernames unrecognizable in all reports. 

Administrators always see usernames in reports.

Choose Security Services > Reporting, and click Edit Settings.

Under Local Reporting, select Anonymize usernames in reports.

Submit and Commit Changes.