Firewalls
Also known as: Firewall
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What is Firewalls?
A firewall enforces network security policy by allowing, rejecting or inspecting traffic between trust boundaries. This profile connects the concept to KBY's practical engineering guidance.
Firewalls may filter by addresses, ports and connection state or inspect applications and content at higher layers. Effective policy begins with clear zones and ownership, uses least privilege, records decisions and removes obsolete rules rather than accumulating permanent exceptions.
Control network communication according to an explicit security policy.
- Perimeter security
- Network segmentation
- Intrusion prevention
1 resource for Firewalls
Browse by purpose, from definitions and learning through operations, diagnostics and controlled recovery.
Learn and operate with Firewalls
Ordered as a reader progression -- from core definitions through to operational reference -- using only the content already connected in the technology registry.
Lexicon Definitions(1)
Start here: understand the core vocabulary.