Firewall Types
Packet, stateful, and app firewalls.
What Is a Firewall
A firewall is a security barrier that controls traffic between networks.
It decides which packets are allowed through and which are blocked, based on a set of rules.
Why Firewalls Matter
Without a firewall, any device on the internet could try to reach your systems directly.
A firewall is the first line of defense, separating trusted internal networks from untrusted external ones.
All lessons in this course
- Firewall Types
- Rules and Policies
- Network Segmentation
- DMZ Design