However, if you have more than one computer on network, and one computer is infected by malware, your network will allow it easily spread it to all of the others in this simple setup. That vulnerability prompts the common firewall configuration hardware firewall facing the raw Internet, plus software firewalls on each computer. If you have just one computer to connect, cascading hardware and software firewalls seem like overkill. The software firewalls prevent malware on one infected computer from attacking the other computers on the local network, and they add second line of defense.
Its simple and not too expensive. Its belt and suspenders solution, but thats more secure. That vulnerability prompts the common firewall configuration hardware firewall facing the raw Internet, plus software firewalls on each computer. Connect router between your internet connection and your computer or network. However, if you have more than one computer on network, and one computer is infected by malware, your network will allow it easily spread it to all of the others in this simple setup. If you have just one computer to connect, cascading hardware and software firewalls seem like overkill.