Chapter 27 Content Filtering
USG20(W)-VPN Series User’s Guide
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Allow Web traffic for trusted
web sites only
When this box is selected, the USG blocks Web access to sites that are not
on the
Trusted Web Sites
list. If they are chosen carefully, this is the most
effective way to block objectionable material.
Check Common Trusted/
Forbidden List
Select this check box to check the common trusted and forbidden web sites
lists. See
for
information on configuring these lists.
Restricted Web Features
Select the check box(es) to restrict a feature. Select the check box(es) to
restrict a feature.
•
When you download a page containing ActiveX or Java, that part of the
web page will be blocked with an X.
•
When you download a page coming from a Web Proxy, the whole web
page will be blocked.
•
When you download a page containing cookies, the cookies will be
removed, but the page will not be blocked.
Block
ActiveX
ActiveX is a tool for building dynamic and active web pages and distributed
object applications. When you visit an ActiveX web site, ActiveX controls are
downloaded to your browser, where they remain in case you visit the site
again.
Java
Java is a programming language and development environment for building
downloadable Web components or Internet and intranet business
applications of all kinds.
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.
Allow Java/ActiveX/Cookies/
Web proxy to trusted web sites
When this box is selected, the USG will permit Java, ActiveX and Cookies
from sites on the
Trusted Web Sites
list to the LAN. In certain cases, it
may be desirable to allow Java, ActiveX or Cookies from sites that are known
and trusted.
Trusted Web Sites
These are sites that you want to allow access to, regardless of their content
rating, can be allowed by adding them to this list.
Add
Click this to create a new entry.
Edit
Select an entry and click this to be able to modify it.
Remove
Select an entry and click this to delete it.
#
This displays the index number of the trusted web sites.
Trusted Web Site
This column displays the trusted web sites already added.
Enter host names such as www.good-site.com into this text field. Do not
enter the complete URL of the site – that is, do not include “http://”. All
subdomains are allowed. For example, entering “*zyxel.com” also allows
“www.zyxel.com”, “partner.zyxel.com”, “press.zyxel.com”, and so on. You
can also enter just a top level domain. For example, enter “*.com” to allow
all .com domains.
Use up to 127 characters (0-9a-z-). The casing does not matter. “*” can be
used as a wildcard to match any string. The entry must contain at least one
“.” or it will be invalid.
Forbidden Web Site List
Sites that you want to block access to, regardless of their content rating, can
be allowed by adding them to this list.
Add
Click this to create a new entry.
Edit
Select an entry and click this to be able to modify it.
Table 166
Configuration > UTM Profile > Content Filter > Profile > Custom Service (continued)
LABEL
DESCRIPTION
Summary of Contents for ZyWall USG20-VPN
Page 17: ...17 PART I User s Guide ...
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Page 99: ...99 PART II Technical Reference ...
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