Firewall Software and Hardware Firewall solutions are both designed to block unauthorized access to computers in your network. A firewall software program is installed on each individual PC it’s meant to protect. To safeguard all your company’s computers, however, each one must have a software firewall installed. This can become expensive and difficult to maintain and support. But, a hardware-based firewall is easier to maintain and administer than individual software firewalls. It protect all the computers on your network.