Normally a firewall is installed where your internal network connects to the Internet. Although larger organizations may also place firewalls between different parts of their own network that require different levels of security, most firewalls screen traffic passing between an internal network and the Internet.

What is a firewall and where is a firewall installed?

A software firewall is a program installed on each computer and regulates traffic through port numbers and applications, while a physical firewall is a piece of equipment installed between your network and gateway. ... If packets match those of an “allowed” rule on the firewall, then it is trusted to enter the network.

Where is the best place to place a firewall?

You place the Firebox between the resources that are either not secure or of the greatest threat and the resources you want to protect. The most common case is to put a Firebox between a router to the Internet and your company network.