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SonicOS 5.8.1 Administrator Guide
established by the administrator. Almost instantaneously, the Web site request is either allowed
through or a Web page is generated by the SonicWALL security appliance informing the user
that the site has been blocked according to policy.
With SonicWALL CFS, network administrators have a flexible tool to provide comprehensive
filtering based on keywords, time of day, trusted and forbidden domain designations, and file
types such as Cookies, Java™ and ActiveX® for privacy. SonicWALL CFS automatically
updates the filters, making maintenance substantially simpler and less time consuming.
SonicWALL CFS can also be customized to add or remove specific URLs from the blocked list
and to block specific keywords. When a user attempts to access a site that is blocked by the
SonicWALL security appliance, a customized message is displayed on the user’s screen.
SonicWALL security appliance can also be configured to log attempts to access sites on the
SonicWALL Content Filtering Service database, on a custom URL list, and on a keyword list to
monitor Internet usage before putting new usage restrictions in place.
SonicWALL CFS Premium blocks 56 categories of objectionable, inappropriate or
unproductive Web content. SonicWALL CFS Premium provides network administrators with
greater control by automatically and transparently enforces acceptable use policies. It gives
administrators the flexibility to enforce custom content filtering policies for groups of users on
the network. For example, a school can create one policy for teachers and another for students.
Note For complete SonicWALL Content Filtering Service documentation, see the SonicWALL
Content Filtering Service Administrator’s Guide available at http://www.sonicw
all.com/us/
Support.html
CFS 3.0 Policy Management Overview
When a CFS policy assignment is implemented using the Application Control method, it is
controlled by Application Control CFS policies in the Firewall > App Rules page instead of by
Users and Zones.
While the new Application Control method of CFS management offers more control and
flexibility, the administrator can still choose the previous user/zone management method to
perform content filtering.
This section includes the following sub-sections:
• Bandwidth Management Methods — page 1191
• Choosing CFS Policy Management Type — page 1190
• Enabling Application Control and CFS — page 1190
• Bandwidth Management Methods — page 1191
• Policies and Precedence: How Policies are Enforced — page 1192