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Indeed, a firewall makes a lot of sense especially when connected to a vast and uncontrolled space such as the web, and this is true not just for business users but for anybody with Internet access. The chief function of a firewall is to ensure that all the incoming and outgoing data from a computer is secure, and this can be done using a hardware component or a software configured appropriately. Primarily the firewall provided limited access to a standalone PC or a network, and hardware firewalls make better sense especially since many come inbuilt with networking devices. For instance, some firewalls come as individual products and some are part of broadband routers and work well since routers are also an essential component in networking. 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.