User's Manual Part 2

Reference Manual for the ProSafe Wireless 802.11g Firewall/Print Server Model FWG114P
Firewall Protection and Content Filtering 6-3
March 2004, 202-10027-01
To delete a keyword or domain, select it from the list, click Delete Keyword, then click Apply.
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 want to block all Internet browsing access, enter the keyword “.”.
Up to 255 entries are supported in the Keyword list.
To specify a Trusted User, enter that computer’s IP address in the Trusted User box and click
Apply. You may specify one Trusted User, which is a computer that will be exempt from blocking
and logging. Since the Trusted User will be identified by an IP address, you should configure that
computer with a fixed or reserved IP address.
Services and Rules Regulate Inbound and Outbound Traffic
The ProSafe Wireless 802.11g Firewall/Print Server Model FWG114P firewall lets you regulate
what ports are available to the various TCP/IP protocols. Follow these two steps to configure
inbound or outbound traffic:
1. Define a Service
2. Set up an Inbound or Outbound Rule that uses the Service
These steps are discussed below.
Defining a Service
Services are functions performed by server computers at the request of client computers. For
example, Web servers serve Web pages, time servers serve time and date information, and game
hosts serve data about other players’ moves. When a computer on the Internet sends a request for
service to a server computer, the requested service is identified by a service or port number. This
number appears as the destination port number in the transmitted IP packets. For example, a packet
that is sent with destination port number 80 is an HTTP (Web server) request.