As we've mentioned, firewalls are a very effective type of network security. This section briefly describes what Internet firewalls can do for your overall site security. Firewall Design describes the various types of firewalls in use today, and the other chapters in Part II describe the details of building those firewalls.Network break-ins have increased as the network has grown and become more impersonal, but it is easy to exaggerate the extent of these security breaches. Over-reacting to the threat of break-ins may hinder the way you use the network. Dont make the cure worse than the disease.Firewalls can do a lot for your sites security. In fact, some advantages of using firewalls extend even beyond security, as described below.
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