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v1.0, September 2009
Chapter 4
Content Filtering and Optimizing Scans
This chapter describes how to apply the content filtering features of the STM and how to optimize
scans to protect your network. This chapter contains the following sections:
• “About Content Filtering and Scans” on this page.
• “Configuring E-mail Protection” on page 4-4.
• “Configuring Web and Services Protection” on page 4-22.
• “Configuring Application Control” on page 4-44.
• “Setting Scanning Exclusions and Web Access Exceptions” on page 4-46.
About Content Filtering and Scans
The STM provides very extensive Web content and e-mail content filtering options, Web browsing
activity reporting, e-mail anti-virus and anti-spam options, and instant alerts via e-mail. You can
establish restricted Web access policies that are based on the time-of-day, Web addresses, and Web
address keywords. You can also block Internet access by applications and services, such as instant
messaging and peer to peer file sharing clients.
Note: For information about how to monitor blocked content and malware threats in real-
time, see “Monitoring Real-Time Traffic, Security, Statistics, and Web Usage” on
page 6-11. For information about how to view blocked content and malware threats
in the logs, see “Querying the Logs” on page 6-22. For information about how to
view quarantined content, see “Viewing and Managing the Quarantine Files” on
page 6-33.