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Chapter 12. Security > Choosing a Hardware or Software Firewall

Choosing a Hardware or Software Firewall

Look for a hardware firewall that provides Network Address Translation (NAT). NAT hides your network from outsiders by handling requests on your network for data from the Internet then passing it on to the correct computer within your network (but not letting any requests come from outside your network).

A software firewall, such as those made by McAfee, Symantec, and Zone Labs, can also keep data from going out of your network onto the Internet (Figure 12.2). Software routers are sometimes called personal firewalls because they are installed at each machine (you don't need a network to use a personal firewall).


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