THOMSON TG608, Руководство по установке и эксплуатации

Страница: 39 / 52

E-DOC-CTC-20080118-0035 v4.0 33
4 Internet Security
4.2 Web Site Filtering
Introduction
The Thomson Gateway allows you to deny access to specific web sites.
Access Denied page
When a user tries to access a page that is being blocked, the following page is displayed:
Address-based filtering
With address-based filtering (or URL-filtering) you can block web sites based on their address (for example
www.porn.com).
Content-based filtering
As you know, the Internet consists of a large number of web sites, and that number still increases every day.
This makes it almost impossible to keep the list of addresses up-to-date.
To solve this problem Thomson Gateway introduced content-based filtering.
With content-based filtering you can block web sites based on their content category (for example
pornography) instead of their URL. This way, you only need to select the appropriate categories and the
content category server takes care of the rest. This content category server is updated at regular intervals.
Combining the two filters
Address-based filtering has priority over content-based filtering . This means that when you are blocking a
specific category, you can still access a specific address provided you create a rule to allow access to that
URL.
For example, if you are blocking content from the Finance / Investment category, you can create a rule to
make an exception for netbanking.mybank.com.
Activating content-based filtering
Before you can use content-based filtering you must first activate it by purchasing a license key at your
service provider or by activating the 30-day trial.
Proceed as follows:
1 Browse to the Thomson Gateway GUI .
2 On the Toolbox menu, click Web Site Filtering .