User Guide

Contents
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AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
Outbreak Filters Overview and Rules Listing 14-23
Outbreak Quarantine 14-23
Alerts, SNMP Traps, and Outbreak Filters 14-23
Troubleshooting The Outbreak Filters Feature 14-24
Reporting Incorrectly Classified Messages to Cisco 14-24
Multiple Attachments and Bypassed Filetypes 14-24
Message and Content Filters and the Email Pipeline 14-24
CHAPTER 15 URL Filtering 15-1
Overview of URL Filtering 15-1
Which URLs Are Evaluated 15-1
Setting Up URL Filtering 15-2
Requirements for URL Filtering 15-2
Enable URL Filtering 15-2
About the Connection to Cisco Web Security Services 15-3
URL Filtering in Cluster Configurations 15-4
Creating Whitelists for URL Filtering 15-4
Cisco Web Security Proxy End User Notification Page 15-5
Customizing the Appearance of End User Notification Page 15-6
Taking Action Based on the Reputation or Category of URLs in Messages 15-7
Using URL-Related Conditions (Rules) and Actions 15-7
Filtering by URL Reputation or URL Category: Conditions and Rules 15-8
Modifying URLs in Messages: Using URL Reputation and URL Category Actions in Filters 15-8
Redirected URLs: What Does the End User Experience? 15-10
Monitoring URL Filtering Results 15-10
Troubleshooting URL Filtering 15-10
Viewing Logs 15-11
Alert: SDS: Error Fetching Enrollment Certificate 15-11
Alert: SDS: Certificate Is Invalid 15-11
Unable to Connect to Cisco Web Security Services 15-11
Using the websecurityadvancedconfig Command 15-12
Message Tracking Search Does Not Find Messages with Specified Category 15-12
Malicious URLs and Marketing Messages Are Not Caught by Anti-Spam or Outbreak Filters 15-12
URLs in a Filtered Category Are Not Handled Correctly 15-13
End User Reaches Malicious Site via Rewritten URL 15-13
Manually Configuring a Certificate for Communication with Cisco Web Security Services 15-13
About URL Categories 15-13
URL Category Descriptions 15-14
Determining the Category of a URL 15-21