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Computer Security
C.5 Electronic Security
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C.4d Network Applications
Network applications (such as software programs) that allow remote access
to the computer also make the computer vulnerable to access from other
people on the Internet. If using a network application that allows remote access,
consider installing a firewall.
C.5 Electronic Security
The following are two methods to secure your computer electronically.
C.5a Network Address Translation
If a local area network and a PPP connection to the ISP using dynamic IP
addresses through a DHCP server are being used, Network Address Translation
(NAT) is being used. NAT provides a very basic level of security.
C.5b Firewalls
The safest way to prevent attacks on the computer is through a firewall – a
hardware device or software program that protects the computer from
unauthorized access by controlling who can access your computer and by
monitoring the transmissions between the computer and the Internet
Windows XP has a built-in firewall. For more information, select Help and
Support Center from the Help menu. Search for “Internet Connection Firewall.”
If Windows 98 SE, Me, NT 4.0, or 2000 is running on the computer, consider
installing a firewall. Hardware and software firewall products are changing
rapidly as more homes and businesses establish high-speed digital connections
between their