Cisco Cisco Email Security Appliance C160 Mode D'Emploi

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Cisco AsyncOS 8.5.6 for Email User Guide
 
Chapter 15      URL Filtering
  Taking Action Based on the Reputation or Category of URLs in Messages
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. 
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. 
Redirect to a custom proxy or web security service: 
http://custom_proxy/$URL
 
This becomes: http://custom_proxy/http://example.com 
The reputation and category of URLs that are included on the selected URL whitelist or on the global 
URL whitelist are not evaluated. 
If you defang or replace URLs, you can choose to ignore URLs in signed messages. 
Pairing a URL Reputation or URL Category action with a URL Reputation or URL Category condition 
(or rule) is not recommended. If you pair a condition (rule) and action that include different categories, 
then no match occurs. 
Tip
To check the category of a particular URL, visit the link in 
Related Topics 
 
 
Redirected URLs: What Does the End User Experience? 
Based on the evaluation by the Cisco Cloud Web Security proxy service: 
If the site is benign, the user is directed to the target web site and has no knowledge that the link has 
been redirected. 
If the site is malicious, the user sees a notice that the site is malicious and access to it has been 
blocked.