Firewalls

Summary

A security control filtering network traffic based on defined rules — from simple packet-filtering firewalls to modern next-generation firewalls that inspect traffic more deeply.

• 1Configure a basic firewall rule set allowing only necessary traffic on a practice VM.
• 2Learn the principle of least privilege applied to network access: deny by default, allow explicitly.
• 3Understand the difference between a stateless and a stateful firewall.