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Appendix c Computer Security
Electronic Security
Here are two methods to secure your computer electronically.
Network Address Translation
If a local area network and a
connection to the
using dynamic
addresses
PPP
ISP
IP
through a
server are being used, Network Address Translation (
) is
DHCP
NAT
being used.
provides a very basic level of security.
NAT
Firewalls
The safest way to prevent attacks on the computer is through a firewall – a hard-
ware device or software program that protects the computer from unauthorized
access by controlling who can access your computer and by monitoring the trans-
missions between the computer and the Internet
Windows
has a built-in firewall. For more information, select Help and
XP
Support Center from the Help menu. Search for Internet Connection Firewall.
If Windows
, Me,
, or
is running on the computer, consider install-
98 SE
NT 4.0
2000
ing a firewall. Hardware and software firewall products are changing rapidly as
more homes and businesses establish high-speed digital connections between their
local area networks and the Internet.
99
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