Chapter 12

Content filtering

This chapter provides a brief overview of content filtering using the embedded

WebGUI.

187

Introduction to content filtering

With Internet content filtering, you can create and enforce Internet access policies tailored to their needs. Content filtering is the ability to block certain web features or specific URL keywords and is not to be confused with packet filtering through

SMT menu 21.1. To access these functions, from the Main Menu, click Content

Filter to expand the Content Filter menus.

Restrict web features

The BCM50a Integrated Router can block web features such as ActiveX controls,

Java applets, and cookies and disable web proxies.

Days and Times

With the BCM50a Integrated Router, you can also define time periods and days during which the BCM50a Integrated Router performs content filtering.

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188 Chapter 12 Content filtering

Configure Content Filtering

Click Content Filter on the navigation panel, to open the screen show in

Figure 61 .

Figure 61 Content filter

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Chapter 12 Content filtering 189

Table 42

describes the fields in Figure 61

.

Table 42 Content filter

Label

Restrict Web

Features

ActiveX

Java

Cookies

Web Proxy

Enable URL

Keyword

Blocking

Keyword

Keyword List

Add

Delete

Clear All

Day to Block

Description

Select the boxes to restrict a feature. When you download a page containing a restricted feature, that part of the web page appears blank or grayed out.

A tool for building dynamic and active Web pages and distributed object applications. When you visit an ActiveX Web site, ActiveX controls are downloaded to your browser, where they remain in case you visit the site again.

A programming language and development environment for building downloadable Web components or Internet and intranet business applications of all kinds.

Used by Web servers to track usage and provide service based on ID.

A server that acts as an intermediary between a user and the Internet to provide security, administrative control, and caching service. When a proxy server is located on the WAN, it is possible for LAN users to circumvent content filtering by pointing to this proxy server.

The BCM50a Integrated Router can block Web sites with URLs that contain certain keywords in the domain name or IP address. For example, if the keyword bad was enabled, all sites containing this keyword in the domain name or IP address will be blocked, for example, URL http://www.website.com/bad.html is blocked. Select this check box to enable this feature.

Type a keyword in this field. You can use any character (up to 64 characters). Wildcards are not allowed. You can also enter a numerical

IP address.

This list displays the keywords already added.

Click Add after you have typed a keyword.

Repeat this procedure to add other keywords. Up to 64 keywords are allowed.

When you try to access a web page containing a keyword, you will receive a message telling you that the content filter is blocking this request.

Highlight a keyword in the lower box and click Delete to remove it. The keyword disappears from the text box after you click Apply.

Click this button to remove all of the listed keywords.

Select check boxes for the days that you want the BCM50a Integrated

Router to perform content filtering. Select the Everyday check box to have content filtering turned on all days of the week.

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190 Chapter 12 Content filtering

Table 42 Content filter

Label

Time of Day to

Block

Apply

Reset

Description

Time of Day to Block allows the administrator to define during which time periods content filtering is enabled. Time of Day to Block restrictions only apply to the keywords (see above). Restrict web server data, such as ActiveX, Java, Cookies and Web Proxy are not affected.

Enter the time period, in 24-hour format, during which content filtering will be enforced. Select the All Day check box to have content filtering always active on the days selected in Day to Block with time of day limitations not enforced.

Click Apply to save your changes.

Click Reset to begin configuring this screen afresh

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