What is a Firewall?
A Firewall is a security device or software that monitors and controls incoming and outgoing network traffic based on predefined rules. It acts as a barrier between trusted and untrusted networks.
Firewalls can be network-based or host-based and are a foundational component of network security.
What is a Firewall used for?
Firewalls are used to prevent unauthorized access, block malicious traffic, and enforce security policies. They protect against threats such as Exploits, Malware, and Denial of Service (DoS / DDoS) attacks.
Organizations use firewalls as part of Defense in Depth and Zero Trust strategies to secure network boundaries.
