SonicWALL TELE3 SP, Руководство администратора

Страница: 39 / 210

Page 38 SonicWALL TELE3 SP Administrator’s Guide
List Updates
It is important to note that Host names, and not TCP/IP addresses, are used for all filtering for
several reasons. One reason is because many blocked sites operate server pools, where many
computers service a single host name, making it impractical and difficult to add and maintain
the numerical addresses of every server in the pool. Another reason is the fact that many sites
which are included in the Content Filter List regularly change the IP address of the server to try
to bypass Content Filter Lists. For this reason, maintaining a current list subscription is critical
for effective content filtering.
Download Automatically every
Selecting Download Automatically every allows you to configure a specific time to
download your Content Filter List. Select a day of the week and a time (24-hour format), for
example, Sun. at 22:00 hours. Or, you can click
Download Now to immediately download
your Content Filter List.
It is recommended to download the URL List at a time when access to the Internet is at a
minimum as downloading the URL List disrupts connectivity to the Internet.
Settings
If you have enabled blocking by Filter Categories and the URL List becomes unavailable,
there are two options available:
•
Block traffic to all Web sites except for Allowed Domains
Selecting this option blocks traffic to all Web sites except Allowed Domains until the URL List
is available.
• Allow traffic to all Web sites
Selecting this option allows traffic to all Web sites without the URL List. However, Forbidden
Domains and Keywords , if enabled, are still blocked.
Select Categories to Block
Block all categories
The SonicWALL uses a Content Filter List generated by CyberPatrol to block access to
objectional Web sites. CyberPatrol classifies objectional Web sites based upon input from a
wide range of social, political, and civic organizations. Select the
Block all categories check
box to block all of these categories. Alternatively, you can select categories individually by
selecting the appropriate check box.
When you register your SonicWALL at <http://www.mysonicwall.com>, you can download a
one month subscription to Content Filter List updates.