Palo Alto Networks Certified Network Security Administrator (PCNSA)Palo Alto Networks Security PlatformMedium
A security engineer is integrating a Palo Alto Networks firewall into an existing network where minimal disruption and no IP address changes are permitted. The firewall needs to provide threat prevention and application control for traffic passing between two internal network segments. Which deployment mode is most suitable for this scenario?
- ANAT Mode
- BTap Mode
- CLayer 3 Mode
- DVirtual Wire Mode
Show answer & explanationAnswer & explanation
Correct answer: D. Virtual Wire Mode
Virtual Wire Mode allows the firewall to be transparently inserted into a network segment without requiring changes to existing IP addressing or routing, making it ideal for scenarios where minimal disruption is a priority. It functions like a 'bump in the wire' while still providing full security features.
Why the other options are wrong
- A. NAT Mode is not a primary deployment mode but a feature often used in Layer 3 deployments, and it would involve IP address changes.
- B. Tap Mode is for passive monitoring only and does not provide inline security enforcement like threat prevention.
- C. Layer 3 Mode requires the firewall to act as a router, necessitating IP address and routing changes.
Virtual Wire Mode
A deployment mode for Palo Alto Networks firewalls where the device acts as a transparent bump-in-the-wire, allowing for inline security enforcement without requiring changes to network topology or IP addressing.
- No IP address or routing changes needed.
- Functions transparently at Layer 2.
- Provides full security features (App-ID, Content-ID, Threat Prevention).
Memory trick: Think of a 'Virtual Wire' as an invisible cable for security.