ZyWALL 2 Series User’s Guide

 

 

Table 12-1 Content Filter : General

 

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

 

 

Enable Content Filter

Select this check box to enable the content filter.

 

 

 

 

 

 

Restrict Web Features : Select the check box(es) to restrict a feature. When you download a page

 

 

containing a restricted feature, that part of the web page will appear blank or grayed out.

 

 

Block

ActiveX is a tool for building dynamic and active web pages and distributed

 

 

ActiveX

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.

 

 

 

 

 

Java

Java is a programming language and development environment for building

 

 

 

downloadable Web components or Internet and intranet business applications

 

 

 

of all kinds.

 

 

Cookies

Cookies are files stored on a computer’s hard drive. Some web servers use

 

 

 

them to track usage and provide service based on ID.

 

 

 

 

 

 

Web Proxy

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.

 

 

 

 

 

 

Schedule to Block : Content filtering scheduling applies to the Filter List, Customized sites and Keywords.

 

 

Restricted web server data, such as ActiveX, Java, Cookies and Web Proxy are not affected.

 

 

 

 

 

 

Always Block

Click this option button to have content filtering always active with Time of Day

 

 

 

limitations not enforced. This is enabled by default.

 

 

 

 

 

 

Block From/To

Click this option button to have content filtering only active during the time

 

 

 

interval specified. In the Block From and To fields, enter the time period, in 24-

 

 

 

hour format, during which content filtering will be enforced.

 

 

Message to display when a site is blocked

 

 

 

 

 

 

Denied Access

Enter a message to be displayed when a user tries to access a restricted web

 

 

Message

site. The default message is “Please contact your network administrator!!”

 

 

 

 

 

 

Exempt Computers

 

 

 

 

 

 

 

Enforce content filter

Select this checkbox to have all users on your LAN follow content filter policies

 

 

policies for all

(default).

 

 

computers

 

 

 

Include specified

Select this checkbox to have a specific range of users on your LAN follow

 

 

address ranges in the

content filter policies.

 

 

content filter

 

 

 

enforcement

 

 

Content Filtering Screens

12-3