Cisco Cisco Email Security Appliance C160 Mode D'Emploi
16-7
User Guide for AsyncOS 10.0 for Cisco Email Security Appliances
Chapter 16 Protecting Against Malicious or Undesirable URLs
Setting Up URL Filtering
Customizing the Notification That End Users See If a Site Is Malicious
If an end user clicks a malicious URL identified by Outbreak Filtering or a Policy (using Content or
Message Filters), the Cisco Web Security proxy displays a notification in the end user’s web browser.
This notification states that the site is malicious and access to it has been blocked.
Message Filters), the Cisco Web Security proxy displays a notification in the end user’s web browser.
This notification states that the site is malicious and access to it has been blocked.
When an end user clicks on a URL rewritten using Outbreak Filtering, the notification page is displayed
for 10 seconds and then is redirected to the Cisco Web Security proxy for click-time evaluation.
for 10 seconds and then is redirected to the Cisco Web Security proxy for click-time evaluation.
You can customize the appearance of this notification page and display your organization’s branding
such as company logo, contact information, and so on.
such as company logo, contact information, and so on.
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.
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.
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.
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