Инструкция для ZYXEL ZyWALL 2 EE

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ZyWALL 2 Series User’s Guide

Content Filtering Screens

12-7

The following table describes the labels in this screen.

Table 12-2 Content Filter : Categories

LABEL DESCRIPTION

Enable Web Site Auto
Categorization

Enable external database content filtering to have the ZyWALL check an
external database to find to which category a requested web page belongs.
The ZyWALL then blocks or forwards access to the web page depending on
the configuration of the rest of this page.

Matched Web Pages

Select

Block

to prevent users from accessing web pages that match the

categories that you select below.

When external database content filtering blocks access to a web page, it
displays the denied access message that you configured in the

Content

Filter General

screen along with the category of the blocked web page.

Select

Log

to record attempts to access prohibited web pages.

Unrated Web Pages Select

Block

to prevent users from accessing web pages that the external

database content filtering has not categorized.

When the external database content filtering blocks access to a web page, it
displays the denied access message that you configured in the

Content

Filter General

screen along with the category of the blocked web page.

Select

Log

to record attempts to access web pages that are not categorized.

When Content Filter Server

Is Unavailable

Select

Block

to block access to any requested web page if the external

content filtering database is unavailable. The following are possible causes:

There is no response from the external content filtering server within
the time period specified in the

Content Filter Server Unavailable

Timeout

field.

The ZyWALL is not able to resolve the domain name of the external
content filtering database.

There is an error response from the external content filtering database
This can be caused by an expired content filtering registration
(“External content filtering’s license key is invalid”).

Select

Log

to record attempts to access web pages that occur when the

external content filtering database is unavailable.

Content Filter Server
Unavailable Timeout

Specify a number of seconds (1 to 30) for the ZyWALL to wait for a response
from the external content filtering server. If there is still no response by the
time this period expires, the ZyWALL blocks or allows access to the
requested web page based on the setting in the

Block When Content Filter

Server Is Unavailable

field.