ZyXEL Communications Centralized Network Management Vantage CNM - Manual (Page 163)

Chapter 6 Device Security Settings
Vantage CNM User’s Guide
163
Enable Content Filter
for VPN traffic Select this check box to have the content filter apply to traffic that the device
sends out through a VPN tunnel or receives through a VPN tunnel. The
device applies the content filter to the traffic before encrypting it or after
decrypting it.
Note: The device can apply content filtering on the traffic going
to or from the device’s VPN tunnels. It does not apply to
other VPN traffic for which the device is not one of the
gateways (VPN pass-through traffic).
External Database
Service General Setup The external database content filtering service has the Vantage CNM check
an external database to find to which category a requested web page
belongs.
Enable External
Database Content
Filtering Turn on external database content filtering to have the Vantage CNM block
or forward access to web pages depending on the Vantage CNM’s external
database content filtering settings.
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 Vantage CNM 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 Vantage CNM to wait for a
response from the external content filtering server. If there is still no
response by the time this period expires, the Vantage CNM blocks or allows
access to the requested web page based on the setting in the Block When
Content Filter Server Is Unavailable field.
Table 66 Device Operation > Device Configuration > Security > Content Filter > General
LABEL DESCRIPTION