Fire Wall

Firewall (computing) In computing, a firewall is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules.What Is a Firewall? A firewall is a network security device that monitors traffic to or from your network. It allows or blocks traffic based on a defined set of security rules.Firewall: What It Is and How It WorksLearn about what a firewall is, how firewalls work, and how to help protect your computer with information from the Safesolution.