Fortinet FortiGate 100A, Administration Manual

Page: 317 / 374

Web filter FortiGuard managed web filtering service
FortiGate-100A Administration Guide 01-28007-0068-20041203
317
Category block
You can filter http content by specific categories using the FortiGuard managed web
filtering service.
This section describes:
• FortiGuard managed web filtering service
• Category block configuration options
• Category block reports
• Category block reports options
• Generating a category block report
• Category block CLI configuration
FortiGuard managed web filtering service
FortiGuard is a managed web filtering solution provided by Fortinet. FortiGuard sorts
hundreds of millions of web pages into a wide range of categories that users can
allow, block, or monitor. The FortiGate unit accesses the nearest FortiGuard Service
Point to determine the category of a requested web page and then follows the firewall
policy configured for that user or interface.
FortiGuard categories and ratings
FortiGuard includes over 60 million individual ratings of web sites applying to
hundreds of millions of pages. Pages are rated into 56 categories that users can
allow, block, or monitor. Categories may be added to or updated as the Internet
evolves. Users can also choose to allow, block, or monitor entire groups of categories
to make configuration simpler. Blocked pages are replaced with a message indicating
that the page is not accessible according to the Internet usage policy.
FortiGuard ratings are performed by a combination of proprietary methods including
text analysis, exploitation of the Web structure, and human raters. Users can notify
the FortiGuard Service Points if they feel a web page is not categorized correctly, and
new sites are quickly rated as required.
See “FortiGuard categories” on page 357 for a complete list and description of the
FortiGuard web filter categories.
FortiGuard Service Points
FortiGuard Service Points provide worldwide coverage. By default, the FortiGate unit
will communicate with the closest Service Point. If the Service Point becomes
unreachable for any reason, the FortiGate unit will contact another Service Point and
rating information will be available within seconds. FortiGuard Service Points are
highly scalable and new Service Points are added as required. The FortiGate unit
communicates with the Service Point over UDP on port 8888. You can change the
FortiGuard hostname if required, using the CLI. See
“Category block CLI
configuration” on page 320 .