A firewall or firewall is a device that acts in the first line of defense against any incoming attack or misuse of our network. It can deflect or soften the effect of many types of attacks and protect our internal servers and workstations from the internet.
The least known and rarely advertised secret in some firewalls is that they are covered by freeware software.
Application Firewall
It protects applications and Web services from malicious attacks, increasing the performance and scalability of applications.
It concentrates the incoming and outgoing traffic of all servers and web applications in a single point.