ZyXEL Communications ZyWALL USG 300 User Manual page 519

Table 174 Anti-X > Content Filter > Filter Profile > Add (continued)
LABEL
Action for Unrated Web
Pages
Action When Category
Server Is Unavailable
Content Filter Category
Service Timeout
Select Categories
Select All Categories
Clear All Categories
Unsafe Categories
Phishing
ZyWALL USG 300 User's Guide
DESCRIPTION
Select Pass to allow users to access web pages that the external web
filtering service has not categorized.
Select Block to prevent users from accessing web pages that the
external web filtering service 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 Warn to display a warning message before allowing users to
access web pages that the external web filtering service has not
categorized.
Select Log to record attempts to access web pages that are not
categorized.
Select Pass to allow users to access any requested web page if 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.
Specify a number of seconds (1 to 60) 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.
This setting applies to all of your content filtering profiles.
Select this check box to restrict access to all site categories listed below.
Select this check box to clear the selected categories below.
These are categories of web pages that are known to pose a threat to
users or their computers.
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).
Chapter 32 Content Filtering
519