Chapter 30 Content Filtering

 

 

 

 

Table 142 Configuration > Anti-X > Content Filter > Filter Profile > Add (continued)

 

LABEL

DESCRIPTION

 

Action When Category

Select Pass to allow users to access any requested web page if

 

Server Is Unavailable

the external content filtering database is unavailable.

 

 

Select Block to block access to any requested web page if the

 

 

external content filtering database is unavailable.

 

 

Select Warn to display a warning message before allowing

 

 

users to access any requested web page if the external content

 

 

filtering database is unavailable.

 

 

The following are possible causes for the external content

 

 

filtering server not being available:

 

 

• 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.

 

 

 

 

Select Categories

 

 

 

 

 

Select All Categories

Select this check box to restrict access to all site categories

 

 

listed below.

 

 

 

 

Clear All Categories

Select this check box to clear the selected categories below.

 

 

 

 

Security Threat

These are categories of web pages that are known to pose a

 

(unsafe)

threat to users or their computers.

 

 

 

 

Phishing

This category includes pages that are designed to appear as a

 

 

legitimate bank or retailer with the intent to fraudulently

 

 

capture sensitive data (i.e. credit card numbers, pin numbers).

 

 

 

 

Spyware/Malware

This category includes pages which distribute spyware and other

 

Sources

malware. Spyware and malware are defined as software which

 

 

takes control of your computer, modifies computer settings,

 

 

collects or reports personal information, or misrepresents itself

 

 

by tricking users to install, download, or enter personal

 

 

information. This includes drive-by downloads; browser

 

 

hijackers; dialers; intrusive advertising; any program which

 

 

modifies your homepage, bookmarks, or security settings; and

 

 

keyloggers. It also includes any software which bundles

 

 

spyware (as defined above) as part of its offering. Information

 

 

collected or reported is "personal" if it contains uniquely

 

 

identifying data, such as e-mail addresses, name, social security

 

 

number, IP address, etc. A siteis not classified as spyware if the

 

 

user is reasonably notified that the software will perform these

 

 

actions (that is, it alerts that it will send personal information,

 

 

be installed, or that it will log keystrokes). Note: Sites rated as

 

 

spyware should have a second category assigned with them.

 

 

 

 

499

ZyWALL USG 20/20W User’s Guide