Host Based Firewalls
A host-based firewall is basically firewall software running on a PC or file server. When running on a personal PC, this commonly is called a personal firewall. This typically is used to enhance your security solution or to provide additional protection to your desktop. You can use literally dozens of free, shareware, and premium software-based firewall products to protect Microsoft Wndows, Apple Macintosh, and the many flavors of UNIX that you might have running as your operating system.
Host-based firewalls usually do not have the same capabilities of the other firewall categories that I already discussed. They are typically a simplified packet-filtering firewall that filter on the IP protocol, such as TCP or UDP, source and destination IP addresses, and protocol information such as TCP or UDP port numbers. Host-based firewalls were built to provide a low-cost alternative to other firewall categories yet still provide a decent level of protection: They typically have fewer filtering and logging capabilities.
Figure 2-21 shows two examples of using host-based firewalls. On the left, the file server has firewall software loaded on it, providing an additional layer of protection along with the packet-filtering router/firewall. At the bottom right is a user who is connected directly to the
This document was created by an unregistered ChmMagic, please go to http://www.bisenter.com to register it. Thanks Internet and who has a host-based firewall installed on his desktop.
Continue reading here: Advantages of Host Based Firewalls
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