Quick Reference Guide

Table Of Contents
62 | Chapter 4: Firewall Protection and Content Filtering
ProSafe Dual WAN Gigabit Firewall with SSL & IPsec VPN FVS336Gv2 Reference Manual
Blocking Internet Sites (Content Filtering)
To restrict internal LAN users from access to certain sites on the Internet, you can use the
VPN firewall’s Content Filtering and Web Components filtering. By default, these features are
disabled; all requested traffic from any website is allowed. If you enable one or more of these
features and users try to access a blocked site, they will see a “Blocked by NETGEAR”
message.
Several types of blocking are available:
Web Components blocking. You can filter the following Web Component types: Proxy,
Java, ActiveX, and Cookies. For example, by enabling Java filtering, “Java” files will be
blocked. Certain commonly used web components can be blocked for increased security.
Some of these components are can be used by malicious Websites to infect computers
that access them.
- Proxy. A proxy server (or simply, proxy) allows computers to route connections to
other computers through the proxy, thus circumventing certain firewall rules. For
example, if connections to a specific IP address are blocked by a firewall rule, the
requests can be routed through a proxy that is not blocked by the rule, rendering the
restriction ineffective. Enabling this feature blocks proxy servers.
- Java. Blocks java applets from being downloaded from pages that contain them. Java
applets are small programs embedded in web pages that enable dynamic
functionality of the page. A malicious applet can be used to compromise or infect
computers. Enabling this setting blocks Java applets from being downloaded.
- ActiveX. Similar to Java applets, ActiveX controls install on a Windows computer
running Internet Explorer. A malicious ActiveX control can be used to compromise or
infect computers. Enabling this setting blocks ActiveX applets from being
downloaded.
- Cookies. Cookies are used to store session information by websites that usually
require login. However, several websites use cookies to store tracking information
and browsing habits. Enabling this option filters out cookies from being created by a
website.
Note: Many websites require that cookies be accepted in order for the site
to be accessed properly. Blocking cookies may interfere with useful
functions provided by these websites.
Keyword Blocking (Domain Name Blocking). You can specify up to 32 words that,
should they appear in the website name (URL) or in a newsgroup name, will cause that
site or newsgroup to be blocked by the VPN firewall.
You can apply the keywords to one or more groups. Requests from the PCs in the groups
for which keyword blocking has been enabled will be blocked. Blocking does not occur for
the PCs that are in the groups for which keyword blocking has not been enabled.