Actiontec electronic GT701A - Manual (Page 102)

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Actiontec USB/Ethernet DSL Modem User Manual
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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 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.
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 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 install-
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.