ZyXEL Communications ZYWALL 2 PLUS User Manual page 213

Table 58 SECURITY > CONTENT FILTER > General
LABEL
Java Applet
Cookies
Web Proxy
Schedule to Block
Always Block
Block From/To
Message to display
when a site is blocked
Denied Access
Message
Redirect URL
Exempt Computers
Enforce content filter
policies for all
computers
Include specified
address ranges in the
content filter
enforcement
Exclude specified
address ranges from
the content filter
enforcement
Add Address Ranges
From
To
Address List
Add Range
Delete Range
Apply
Reset
ZyWALL 2 Plus User's Guide
DESCRIPTION
Java is a programming language and development environment for building
downloadable Web components or Internet and intranet business
applications of all kinds.
Cookies are files stored on a computer's hard drive. Some web servers use
them to track usage and provide service based on ID.
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.
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.
Click this option button to have content filtering always active with Time of
Day limitations not enforced. This is enabled by default.
Click this option button to have content filtering only active during the time
interval(s) specified. In the Block From and To fields, enter the time
period(s), in 24-hour format, during which content filtering will be enforced.
Enter a message to be displayed when a user tries to access a restricted
web site. The default message is Please contact your network administrator!
Enter the URL of the web page to which you want to send users when their
web access is blocked by content filtering. The web page you specify here
opens in a new frame below the denied access message.
Use "http://" followed by up to 120 ASCII characters. For example, http://
192.168.1.17/blocked access.
Select this checkbox to have all users on your LAN follow content filter
policies (default).
Select this checkbox to have a specific range of users on your LAN follow
content filter policies.
Select this checkbox to exempt a specific range of users on your LAN from
content filter policies.
Type the beginning IP address (in dotted decimal notation) of the specific
range of users on your LAN.
Type the ending IP address (in dotted decimal notation) of the specific range
of users on your LAN, then click Add Range.
This text field shows the address ranges that are blocked.
Click Add Range after you have filled in the From and To fields above.
Click Delete Range after you select the range of addresses you wish to
delete.
Click Apply to save your changes back to the ZyWALL.
Click Reset to begin configuring this screen afresh.
Chapter 12 Content Filtering Screens
213