Engineer Briefing

A network connects users, applications, and the Internet.

However, not every connection should be allowed.

A company needs a security device that can answer:

"Should this traffic be allowed or blocked?"

That device is:

Firewall

Mission Objectives

By the end of this mission, students should understand:

• What a firewall does.
• Types of firewalls.
• How firewall rules work.
• Stateful inspection.
• Firewall placement in enterprise networks.

1. What Is a Firewall?

A firewall is a security device that controls network traffic based on rules.

It sits between trusted and untrusted networks.

Example: