The Global Gen World

There is a system or group of systems in the computer that acts as the security system within. This is what is called the firewall which enforces an access control policy between two networks. Its primary purpose is to protect a network from unauthorized access.

Firewalls effectively function as a protective boundary between a computer and the outside world by screening incoming and outgoing traffic. They also assist in preventing computers from unwilling participation in attacking other systems aside from shielding them from unsolicited attacks. Firewalls have been quite efficient in various threats such as session hacking, operating system bugs, denial of service attacks, email bombs, spam and viruses.