Blocking And Filtering Content And Applications; Blocking Web Applications And Components - Cisco Small Business RV220W Administration Manual

Configuring the Firewall

Blocking and Filtering Content and Applications

Blocking and Filtering Content and Applications
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STEP 3
Cisco RV220W Administration Guide
The Cisco RV220W supports several content filtering options. You can block
certain web applications or components (such as ActiveX or Java). You can set up
trusted domains from which to always allow content. You can block access to
Internet sites by specifying keywords to block. If these keywords are found in the
site's name (for example, web site URL or newsgroup name), the site is blocked.
You also need to turn on content filtering to set up trusted domains.

Blocking Web Applications and Components

Choose Firewall > Access Control > Content Filtering.
Check the Enable box.
Certain commonly-used web components can be blocked for increased security.
Some of these components can be used by malicious websites to infect
computers that access them. With content filtering enabled, select the check box
for each component you wish to block:
• Block 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.
• Block 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.
• Block ActiveX—Similar to Java applets, ActiveX controls are installed on a
Windows computer while running Internet Explorer. A malicious ActiveX
control can be used to compromise or infect computers. Enabling this
setting blocks ActiveX applets from being downloaded.
• Block 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.
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