Nokia IP60 - Security Appliance, User Manual

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Web Filtering
Chapter 15: SMART Management and Subscription Services 333
Web Filtering
When the Web Filtering service is enabled, access to Web content is restricted according to the categories
specified under
Allow Categories
. If a user attempts to access a blocked page, the
Access Denied
page
appears. For information on customizing this page, see Customizing the Access Denied Page on page 266.
If desired, you can permit specific users to override Web Filtering. Such users will be able to view Web
pages without restriction, after they have provided their username password via the
Access Denied
page.
For information on granting Web Filtering override permissions, see Adding and Editing Users on page
399.
In addition, you can choose to exclude specific network objects from Web Filtering enforcement. Users
connecting from these network objects will be able to view Web pages without restriction, regardless of
whether they have Web Filtering override permissions. For information on configuring network objects, see
Using Network Objects on page 134.
Note:
The Web Filtering service is only available if you are connected to a Service
Center and subscribed to this service.
Note:
The Web Filtering subscription service differs from Web rules in the following
ways:
The category-based Web Filtering service is subscription-based and
requires a connection to the Service Center, while Web rules are
included with the IP60 appliance.
The category-based Web Filtering service is centralized, extracting
URLs from HTTP requests and sending the URLs to the Service Center
to determine whether they should be blocked or allowed. With Web
rules, HTTP requests are analyzed in the gateway itself.
The Web Filtering service is category based; that is, it filters Web sites
based on the category to which they belong. In contrast, Web rules
allow and block specific URLs.
You can use either content filtering solution or both in conjunction. When a user
attempts to access a Web site, the IP60 appliance first evaluates the Web rules. If
the site is not blocked by the Web rules, the Web Filtering service is then consulted.
For information on Web rules, see
Using Web Rules on page 261.
Enabling/Disabling Web Filtering
To enable/disable Web Filtering
1. Click
Services
in the main menu, and click the
Web Filtering
tab.