Filter
Top Products
ProSafe Gigabit 8 Port VPN Firewall FVS318G Reference Manual
Firewall Protection and Content Filtering 4-31
v1.1, August 2010
– 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..
• 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.
You can bypass keyword blocking for trusted domains by adding the exact matching domain
to the list of Trusted Domains. Access to the domains or keywords on this list by PCs, even
those in the groups for which keyword blocking has been enabled, will still be allowed without
any blocking.
Keyword application examples:
• If the keyword “XXX” is specified, the URL <http://www.badstuff.com/xxx.html> is blocked,
as is the newsgroup alt.pictures.XXX.
• If the keyword “.com” is specified, only Web sites with other domain suffixes (such as .edu or
.gov) can be viewed.
• If you wish to block all Internet browsing access, enter the keyword “.”.
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.