User Guide

15-2
AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Chapter 15 URL Filtering
Setting Up URL Filtering
• http, https, or www
• domain or IP address
• port number preceded by a colon (:)
• uppercase or lowercase letters
When evaluating URLs to determine whether a message is spam, if necessary for load management, the
system prioritizes screening of incoming messages over outgoing messages.
Setting Up URL Filtering
Related Topics
• Requirements for URL Filtering, page 15-2
• Enable URL Filtering, page 15-2
• About the Connection to Cisco Web Security Services, page 15-3
• URL Filtering in Cluster Configurations, page 15-4
• Creating Whitelists for URL Filtering, page 15-4
Requirements for URL Filtering
In addition to enabling URL filtering, you must enable other features depending on desired functionality.
For enhanced protection against spam:
• Anti-spam scanning must be enabled globally and per applicable mail policy. This can be either the
IronPort Anti-Spam or the Intelligent Multi-Scan feature. See the anti-spam chapter.
For enhanced protection against malware:
• The Outbreak Filters feature must be enabled globally and per applicable mail policy. See the
Outbreak Filters chapter.
To take action based on URL reputation, or to enforce acceptable use policies using message and content
filters:
• The Outbreak Filters feature must be enabled globally. See the Outbreak Filters chapter.
Enable URL Filtering
Before You Begin
• Ensure that the requirements for the individual URL filtering features that you want to use have been
met. See Requirements for URL Filtering, page 15-2.
• (Optional) Create a list of URLs that you want all URL filtering functionalities to ignore. See
Creating Whitelists for URL Filtering, page 15-4.
Procedure
Step 1 Select Security Services > URL Filtering.