PCNSE Decryption and SSL Inspection Practice Question
A security engineer is configuring SSL decryption on a Palo Alto Networks firewall. The engineer wants to ensure that the firewall can decrypt outbound HTTPS traffic and present a valid certificate to internal users. Which certificate must be installed on the firewall to sign the certificates presented to internal users during SSL Forward Proxy decryption?
⚠ Common exam trap
Test-takers frequently confuse the forward trust certificate with the forward untrust certificate or the SSL inbound certificate, which serve different purposes in decryption.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
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Forward trust certificate
The forward trust certificate is specifically designed for SSL Forward Proxy decryption. It is a CA certificate that the firewall uses to sign the certificates presented to internal users. Clients must trust this certificate to avoid errors. The forward untrust certificate is used for untrusted server certificates, and the SSL inbound certificate is for inbound inspection.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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SSL inbound certificate
Why it's wrong here
The SSL inbound certificate is used for SSL Inbound Inspection, where the firewall decrypts traffic destined to internal servers. It is not used for SSL Forward Proxy decryption of outbound traffic. The forward trust certificate is required for outbound decryption to sign certificates for clients.
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Forward untrust certificate
Why it's wrong here
The forward untrust certificate is used when the firewall cannot verify the server's certificate. It is presented to the client to indicate that the server's certificate is not trusted. It is not used to sign certificates for trusted servers; instead, it is used for untrusted connections to alert the user.
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Forward trust certificate
Why this is correct
The forward trust certificate is used by the firewall to sign the certificates it presents to internal clients when decrypting outbound SSL traffic. It must be a CA certificate and be trusted by the clients. This certificate enables the firewall to act as a proxy and establish separate SSL connections with the client and the server.
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Root CA certificate
Why it's wrong here
A root CA certificate is a self-signed certificate that is the top of a certificate chain. While the forward trust certificate is a CA certificate, it is not necessarily a root CA. The firewall uses the forward trust certificate specifically for signing, not a generic root CA certificate. The forward trust certificate must be installed and trusted by clients.
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This PCNSE question is part of Courseiva's 319-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Palo Alto Networks exam blueprint
This PCNSE practice question is part of Courseiva's free Palo Alto Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCNSE exam.