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16-7
User Guide for AsyncOS 9.7 for Cisco Email Security Appliances
 
Chapter 16      Protecting Against Malicious or Undesirable URLs
  Taking Action Based on the Reputation or Category of URLs in Messages
Note
If you do not customize the notification page, end users see a Cisco branded notification page. 
Before You Begin
Enable URL filtering. See 
Procedure
Step 1
Select Security Services > Block Page Customization.
Step 2
Click Enable.
Step 3
Check the Enable Block Page customization check box and enter the following details:
URL of the organization’s logo. It is recommended that the logo image is hosted on a publicly 
accessible server.
Organization’s name
Organization’s contact information
Step 4
Choose the language of the notification. You can choose any one of the languages supported by the web 
interface.
Note
The default language of the end user's browser takes precedence over the language you have 
selected here. Also, if the default language of the end user's browser is not supported by 
AsyncOS, then the notification is displayed in the language you have selected here. 
Step 5
(Optional) Preview the notification page by clicking Preview Block Page Customization link.
Step 6
Submit and commit your changes. 
Next Steps
Set up URL rewriting in one of the following ways:
Using Outbreak Filters. See 
Using Content or Message Filters. See 
Taking Action Based on the Reputation or Category of URLs in 
Messages 
You can take action based on the reputation or category of URL links in messages using message filters 
and content filters in incoming and outgoing mail policies. 
Because Outbreak Filters take many factors into consideration when evaluating messages for malware, 
and URL reputation alone may not trigger aggressive message handling, you may want to create filters 
based on URL reputation. 
For example, you can use URL Reputation filters to: