Palo Alto Decrypt Mirror Interfaces – PCNSE Study Guide

Overview

Decrypt Mirror Interfaces in Palo Alto Networks firewalls allow the forwarding of decrypted SSL/TLS traffic to a designated interface for analysis by external tools. This feature is essential for organizations requiring deep packet inspection, data loss prevention (DLP), or forensic analysis.

Key Considerations

Configuration Steps

  1. Obtain and install the Decryption Port Mirror license via the Palo Alto Networks Customer Support Portal.
  2. Reboot the firewall to activate the license.
  3. Configure an Ethernet interface with the type 'Decrypt Mirror'.
  4. Enable 'Allow forwarding of decrypted content' in the Content-ID settings.
  5. Create or modify a Decryption Profile to specify the Decrypt Mirror interface and set mirroring options.
  6. Apply the Decryption Profile to the appropriate Decryption Policy rules.
  7. Commit the configuration changes.

Mermaid Diagram: Decrypt Mirror Process 

sequenceDiagram
    participant Client
    participant Firewall
    participant ExternalTool

    Client->>Firewall: Encrypted Traffic
    Firewall->>Client: Decryption Handshake
    Firewall->>ExternalTool: Decrypted Traffic
    Firewall->>Destination: Forwarded Traffic

References

Decrypt Mirror Interfaces Quiz

1. What is the primary purpose of a Decrypt Mirror Interface?

2. Which license is required to enable Decrypt Mirror functionality?

3. True or False: Decrypt Mirror Interfaces can be configured on VM-Series firewalls in public cloud environments.

4. Which interface type must be configured to enable Decrypt Mirror functionality?

5. True or False: Decrypt Mirror functionality is available on all Palo Alto firewall models, including VM-Series in public cloud environments.

6. What must be enabled in the Content-ID settings to allow forwarding of decrypted content?

7. Which of the following tools can receive mirrored decrypted traffic from a Decrypt Mirror interface? (Choose all that apply)

8. What is the primary security concern when using Decrypt Mirror interfaces?

9. True or False: Decryption Port Mirroring requires a paid license from Palo Alto Networks.

10. Which setting in the Decryption Profile determines when traffic is mirrored?