Stateful firewall
Also called: dynamic packet filtering
Course: AP® Cybersecurity Shows up in: Unit 3: Securing Networks
A firewall that tracks the state of connections passing through it and filters by connection-related rules as well as header information.
Appears in the course and exam description (CED): 3.4.A.3
Why it matters in Unit 3
It gives more control over what is allowed in and out.
Example
Allow a reply from a website only if a device inside asked for it.
Learn it properly, with a checkpoint 3.4 Protecting Networks: Firewalls