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PCNSE · Question #595

A network security administrator wants to begin inspecting bulk user HTTPS traffic flows egressing out of the internet edge firewall. Which certificate is the best choice to configure as an SSL Forwar

The correct answer is A. A self-signed Certificate Authority certificate generated by the firewall. To inspect outbound HTTPS traffic using SSL Forward Trust, the firewall requires a Certificate Authority (CA) certificate to dynamically sign forged server certificates.

Submitted by tom_us· Apr 18, 2026Deploy and Configure

Question

A network security administrator wants to begin inspecting bulk user HTTPS traffic flows egressing out of the internet edge firewall. Which certificate is the best choice to configure as an SSL Forward Trust certificate?

Options

  • AA self-signed Certificate Authority certificate generated by the firewall
  • BA Machine Certificate for the firewall signed by the organization's PKI
  • CA web server certificate signed by the organization's PKI
  • DA subordinate Certificate Authority certificate signed by the organization's PKI

How the community answered

(26 responses)
  • A
    92% (24)
  • B
    4% (1)
  • C
    4% (1)

Why each option

To inspect outbound HTTPS traffic using SSL Forward Trust, the firewall requires a Certificate Authority (CA) certificate to dynamically sign forged server certificates.

AA self-signed Certificate Authority certificate generated by the firewallCorrect

A self-signed Certificate Authority certificate generated by the firewall is the best choice because it acts as the trusted root for the dynamically generated server certificates during SSL Forward Trust decryption. This self-signed CA must then be distributed and installed as a trusted root CA on all client devices that will be subject to decryption.

BA Machine Certificate for the firewall signed by the organization's PKI

A Machine Certificate for the firewall is used to identify the firewall itself (e.g., for GlobalProtect or management access), not to sign other certificates for SSL Forward Trust decryption.

CA web server certificate signed by the organization's PKI

A web server certificate is used by a specific server to present its identity to clients and cannot function as a Certificate Authority to sign other certificates needed for SSL Forward Trust.

DA subordinate Certificate Authority certificate signed by the organization's PKI

While a subordinate CA certificate signed by the organization's PKI is a technically valid option for SSL Forward Trust, a self-signed CA generated directly on the firewall is often simpler to implement and distribute for this specific purpose if an existing PKI integration is not strictly required or preferred, making it a strong candidate for "best choice" in some scenarios.

Concept tested: SSL Forward Trust certificate requirements

Source: https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-admin/decryption/configure-ssl-forward-proxy.html

Topics

#SSL Decryption#SSL Forward Proxy#Certificates#Firewall Configuration

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