The Custom List tab on the Content Filter server allows you to customize your URL list to include Allowed Domains and Forbidden Domains. By customizing your URL list, you can include specific domains to be accessed, blocked (including keywords in URL). The settings available on the Custom List page are different for an appliance with a valid SonicWall CFS Premium subscription than they are for an appliance with no CFS Premium license.
By default, the Allowed Domains list is disabled, and the Forbidden Domains list and URL Keyword Blocking list are enabled. When SonicWall CFS Premium is licensed on the appliance, these settings are controlled on a per-policy basis. Without a current SonicWall CFS Premium subscription, these settings are available on the Custom List tab at the bottom of the page.
1. Login to the SonicWall Management Interface. 2. On the Security Services > Content Filter page, select SonicWall CFS under Content Filter Type and click Configure. 3. On the SonicWall Filter Properties page, click the Custom List tab. 4. To enable blocking using Keywords, click Add under Keyword Blocking and enter the keyword (example: MP3) to block in the Add Keyword field. Keywords can be 16 characters maximum length. The maximum number of keywords is 100. 5. To remove a keyword, select it from the list and click Delete. Once the keyword has been removed, the Status bar displays Ready. 6. Click OK when finished.
SonicWall will now block access to all websites with MP3 in the domain name.
Note: By default, when the administrator (“admin” user) is logged into the SonicOS management interface from a system, CFS blocking is suspended for that system’s IP address for the duration of the authenticated session. Make sure you logout of the SonicOS management interface before testing.