Cisco Cisco Email Security Appliance C650 Guía Del Usuario
16-6
User Guide for AsyncOS 9.8 for Cisco Email Security Appliances
Chapter 16 Protecting Against Malicious or Undesirable URLs
Setting Up URL Filtering
Procedure
Step 1
Select Mail Policies > URL Lists.
Step 2
Select Add URL List or click a list to edit.
Be sure all URLs that you want to globally whitelist are in a single list. You can select only one global
whitelist for URL filtering.
whitelist for URL filtering.
Step 3
Create and submit the URL list.
To view a list of supported URL formats, enter a semicolon (;) into the URLs box and click Submit.
Then click the more... link that appears.
Then click the more... link that appears.
Each URL, domain, or IP address can be on a separate line, or separate each with a comma.
Step 4
Commit your changes.
What To Do Next
•
•
To designate a URL list as the whitelist for a specific condition (rule) or action in a content or
message filter, see
message filter, see
and
. For message filters, see also
and
.
Related Topics
•
Importing a URL List
You can import a URL list to use as a whitelist for URL filtering.
Procedure
Step 1
Create the text file to import:
•
The first line must be the name of the URL list.
•
Each URL must be on a separate line.
Step 2
Upload the file to the
/configuration
directory on the appliance.
Step 3
Use the
urllistconfig
>
new
command in the command-line interface.
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.