ZyXEL Communications ZyXEL ZyWALL 5 User Manual
Page 190
ZyWALL 5 User’s Guide
Chapter 11 Content Filtering Screens
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Cookies
Cookies are files stored on a computer’s hard drive. Some web servers use
them to track usage and provide service based on ID.
Web Proxy
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.
Schedule to Block
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.
Always Block
Click this option button to have content filtering always active with Time of
Day limitations not enforced. This is enabled by default.
Block From/To
Click this option button to have content filtering only active during the time
interval specified. In the Block From and To fields, enter the time period, in
24-hour format, during which content filtering will be enforced.
Message to display
when a site is blocked
Denied Access
Message
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!!
Redirect URL
Enter the URL of a web page to which to send the user when the ZyWALL’s
content filtering blocks access to a web site. Type up to 128 characters.
The web page that you specify displays in the lower part of the screen. The
denied access message displays in the top of the screen. If you do not
specify a redirect URL, only the denied access message displays and the
lower part of the screen is blank.
Exempt Computers
Enforce content filter
policies for all
computers
Select this checkbox to have all users on your LAN follow content filter
policies (default).
Include specified
address ranges in the
content filter
enforcement
Select this checkbox to have a specific range of users on your LAN follow
content filter policies.
Exclude specified
address ranges from the
content filter
enforcement
Select this checkbox to exempt a specific range of users on your LAN from
content filter policies.
Add Address Ranges
From
Type the beginning IP address (in dotted decimal notation) of the specific
range of users on your LAN.
To
Type the ending IP address (in dotted decimal notation) of the specific range
of users on your LAN, then click Add Range.
Address List
This text field shows the address ranges that are blocked.
Add Range
Click Add Range after you have filled in the From and To fields above.
Delete Range
Click Delete Range after you select the range of addresses you wish to
delete.
Apply
Click Apply to save your changes back to the ZyWALL.
Reset
Click Reset to begin configuring this screen afresh.
Table 56 Content Filter : General
LABEL
DESCRIPTION