Cisco Cisco Email Security Appliance C190 Guia Do Utilizador
15-6
Cisco AsyncOS 8.5 for Email User Guide
Chapter 15 URL Filtering
Taking Action Based on the Category of URLs in Messages
If you want to modify URLs in a message, or modify their behavior, configure only a URL Category
action. You do not need a separate URL Category condition or rule for this purpose.
action. You do not need a separate URL Category condition or rule for this purpose.
Tip
To check the category of a particular URL, visit the link in
.
Related Topics
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Modifying URLs in Messages: Using URL Category Actions in Filters
Use a URL Category action to modify URLs in a message, or their behavior, based on the category of
the URL.
the URL.
URL Category actions do not require a separate condition. Instead, the selected action is applied based
on the categories that you select in the URL Category action.
on the categories that you select in the URL Category action.
The action is applied only to URLs that meet the criteria specified in the action. Other URLs in the
message are not modified.
message are not modified.
The following URL-related actions are available:
•
Defang a URL so that it is unclickable. Message recipients can still see and copy the URL.
•
Redirect a URL so that if the message recipient clicks the link, the transaction is routed to a Cisco
web security proxy in the cloud, which blocks access if the site is malicious.
web security proxy in the cloud, which blocks access if the site is malicious.
Example: You might want to redirect all URLs in the Uncategorized category to the Cisco Cloud
Web Security proxy service, as malicious sites used in phishing attacks often do not exist long
enough to be classified.
Web Security proxy service, as malicious sites used in phishing attacks often do not exist long
enough to be classified.
See also
To redirect URLs to a different proxy, see the example in the following bullet.
Note
The Cisco Cloud Web Security proxy service has no configurable options in this release. For
example, there is no threat score threshold to adjust or action to specify based on threat
score.
example, there is no threat score threshold to adjust or action to specify based on threat
score.
•
Replace the URL with any text.
To include the original URL in the text that appears in the message, use the
$URL
variable.
Examples:
–
Replace all URLs in the Illegal Downloads category with a note:
Message from your system administrator: A link to an illegal downloads web site
has been removed from this message.
–
Include the original URL along with a warning:
WARNING! The following URL may contain malware: $URL
This becomes: WARNING: The following URL may contain malware: http://example.com.