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A broadband router, for example, makes a sensible hardware firewall since it also handles part of connecting to the Internet, but there are also hardware firewalls that are sold as individual components. When a hardware firewall is installed it comes with an easy to user interface that lets you set the authentication information such as security certificates and password protection. Even with minimal configuration most hardware firewalls may work well, but configuring and maintaining the requisite settings will ensure optimal security and data protection. Most hardware firewalls have the capability to connect to a fixed number of individual PCs, but larger corporate networks can be handled using business networking hardware. The mode of functioning of a hardware firewall is via the process of packet filtering that is basically the analysis of the data packets that are transferred.