Glossary: Hardening, Firewalls and Intrusion Detection

Firewall

Also written: firewalls, firewall rules

A device or program that allows or blocks traffic by rules. At Kettle & Crane it controls what may cross between the office VLANs and what may reach the shop.

Where the book teaches it

Chapter 1: Segmentation, Access Controls and Hardening
Chapter 3: Deception and Disruption Technology
Chapter 4: Monitoring, Mobile Devices and Application Control
Chapter 5: Intrusion Detection and Prevention
Chapter 6: Firewalls
Chapter 7: What's next

Related terms

Network firewall Host-based firewall Rule-based firewall Stateful firewall Layer 4 firewall Layer 7 firewall