SSCP Systems Security Certified PractitionerNetwork and Communications SecurityMedium
A security architect is designing a network for a new branch office. The design includes a perimeter firewall that must inspect all inbound and outbound traffic, perform deep packet inspection, and apply application-aware policies. Which type of firewall is best suited for these advanced security requirements?
- AStateful firewall
- BPacket-filtering firewall
- CProxy firewall
- DNext-Generation Firewall (NGFW)
Show answer & explanationAnswer & explanation
Correct answer: D. Next-Generation Firewall (NGFW)
A Next-Generation Firewall (NGFW) combines traditional firewall functions with advanced features like deep packet inspection (DPI), intrusion prevention (IPS), and application awareness, making it ideal for comprehensive perimeter security and advanced policy enforcement.
Why the other options are wrong
- A. A stateful firewall tracks connection states but does not typically perform deep packet inspection or have application-awareness capabilities beyond port numbers.
- B. A packet-filtering firewall operates at Layer 3/4 and only inspects header information, lacking the capabilities for deep packet inspection or application awareness.
- C. A proxy firewall (or application-level gateway) operates at the application layer and can inspect traffic deeply but often only for specific applications and might introduce latency; NGFWs offer a more integrated solution for broad application-aware policies.
Next-Generation Firewall (NGFW)
A deep packet inspection firewall that moves beyond port/protocol inspection to include application-level inspection, intrusion prevention, and threat intelligence.
- Performs deep packet inspection (DPI).
- Offers application awareness and control.
- Integrates intrusion prevention system (IPS) capabilities.
Memory trick: Firewall Evolution: Packet is Basic, Stateful is Smart, Next-Gen is Nifty, Proxy is a PITA.