- A
Decryption is applied globally to all traffic; selective decryption is not possible.
Why wrong: Decryption policy allows selective decryption based on multiple criteria.
- B
The firewall can decrypt all TLS sessions regardless of client certificate authentication.
Why wrong: Sessions with client certificate authentication cannot be decrypted unless the client certificate is imported on the firewall.
- C
When deploying SSL Forward Proxy, the firewall must generate a certificate for each decrypted session to re-encrypt traffic to the client.
The firewall acts as a proxy, generating a certificate signed by a trusted CA to re-encrypt traffic to the client.
- D
Traffic using Server Name Indication (SNI) in TLS must be decrypted at the firewall or it will be dropped.
Why wrong: SNI is used for routing but not required for decryption; traffic without SNI can still be decrypted.
- E
The firewall uses a decryption policy to determine which traffic to decrypt.
Decryption policy rules define which traffic is decrypted based on source, destination, URL category, etc.
Quick Answer
The answer is that the firewall uses a decryption policy to determine which traffic to decrypt, and it dynamically generates a session-specific certificate signed by a trusted CA to re-encrypt traffic to the client. This is correct because in an SSL forward proxy design, the Palo Alto firewall acts as a man-in-the-middle, terminating the client’s TLS connection, inspecting the decrypted payload, and then initiating a new TLS connection to the server. To avoid certificate warnings, the firewall must generate a certificate on the fly for each session, signed by a CA certificate that is pre-installed and trusted on client devices. On the PCNSE exam, this concept tests your understanding of how decryption policies control traffic selection and how certificate handling ensures seamless inspection without breaking client trust. A common trap is confusing forward proxy with inbound inspection, where the server’s original certificate is used. Memory tip: think “policy picks, proxy signs” — the decryption policy decides what to decrypt, and the firewall signs a new cert for each session.
PCNSE Decryption and SSL Inspection Practice Question
This PCNSE practice question tests your understanding of decryption and ssl inspection. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO of the following are valid considerations when designing an SSL Forward Proxy decryption deployment in a Palo Alto Networks firewall?
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
When deploying SSL Forward Proxy, the firewall must generate a certificate for each decrypted session to re-encrypt traffic to the client.
In an SSL Forward Proxy deployment, the firewall acts as a man-in-the-middle: it terminates the client's TLS connection, inspects the decrypted traffic, and then initiates a new TLS connection to the server. To re-encrypt the traffic back to the client, the firewall must dynamically generate a certificate for each session, signed by a trusted CA certificate installed on the client devices. This ensures the client sees a valid certificate chain and does not generate a certificate warning.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Decryption is applied globally to all traffic; selective decryption is not possible.
Why it's wrong here
Decryption policy allows selective decryption based on multiple criteria.
- ✗
The firewall can decrypt all TLS sessions regardless of client certificate authentication.
Why it's wrong here
Sessions with client certificate authentication cannot be decrypted unless the client certificate is imported on the firewall.
- ✓
When deploying SSL Forward Proxy, the firewall must generate a certificate for each decrypted session to re-encrypt traffic to the client.
Why this is correct
The firewall acts as a proxy, generating a certificate signed by a trusted CA to re-encrypt traffic to the client.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Traffic using Server Name Indication (SNI) in TLS must be decrypted at the firewall or it will be dropped.
Why it's wrong here
SNI is used for routing but not required for decryption; traffic without SNI can still be decrypted.
- ✓
The firewall uses a decryption policy to determine which traffic to decrypt.
Why this is correct
Decryption policy rules define which traffic is decrypted based on source, destination, URL category, etc.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume SSL Forward Proxy can decrypt all TLS traffic, including sessions with client certificate authentication, but the firewall cannot possess the client's private key and thus must skip decryption for such sessions.
Detailed technical explanation
How to think about this question
Under the hood, the firewall's SSL Forward Proxy generates a per-session certificate using the configured Forward Trust certificate as the issuer, and the subject/issuer fields are populated from the server's actual certificate. A subtle behavior is that if the server's certificate uses Extended Validation (EV), the firewall's generated certificate will not carry the EV indicator, which may cause some applications or browsers to treat the connection as less trusted. In real-world deployments, organizations must ensure the Forward Trust CA is deployed to all client devices via Group Policy or MDM to avoid certificate errors.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Decryption and SSL Inspection — study guide chapter
Learn the concepts, then practise the questions
- →
Decryption and SSL Inspection practice questions
Targeted practice on this topic area only
- →
All PCNSE questions
516 questions across all exam domains
- →
Palo Alto Networks Certified Network Security Engineer PCNSE study guide
Full concept coverage aligned to exam objectives
- →
PCNSE practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related PCNSE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Manage, Monitor and Operate practice questions
Practise PCNSE questions linked to Manage, Monitor and Operate.
Securing Traffic and App-ID practice questions
Practise PCNSE questions linked to Securing Traffic and App-ID.
Securing Users and Applications with Authentication practice questions
Practise PCNSE questions linked to Securing Users and Applications with Authentication.
Decryption and SSL Inspection practice questions
Practise PCNSE questions linked to Decryption and SSL Inspection.
Managing Troubleshooting and High Availability practice questions
Practise PCNSE questions linked to Managing Troubleshooting and High Availability.
Deploy and Configure Firewalls practice questions
Practise PCNSE questions linked to Deploy and Configure Firewalls.
Core Concepts and Architecture practice questions
Practise PCNSE questions linked to Core Concepts and Architecture.
Secure Access and VPN practice questions
Practise PCNSE questions linked to Secure Access and VPN.
Troubleshoot practice questions
Practise PCNSE questions linked to Troubleshoot.
PCNSE fundamentals practice questions
Practise PCNSE questions linked to PCNSE fundamentals.
PCNSE scenario practice questions
Practise PCNSE questions linked to PCNSE scenario.
PCNSE troubleshooting practice questions
Practise PCNSE questions linked to PCNSE troubleshooting.
Practice this exam
Start a free PCNSE practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this PCNSE question test?
Decryption and SSL Inspection — This question tests Decryption and SSL Inspection — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: When deploying SSL Forward Proxy, the firewall must generate a certificate for each decrypted session to re-encrypt traffic to the client. — In an SSL Forward Proxy deployment, the firewall acts as a man-in-the-middle: it terminates the client's TLS connection, inspects the decrypted traffic, and then initiates a new TLS connection to the server. To re-encrypt the traffic back to the client, the firewall must dynamically generate a certificate for each session, signed by a trusted CA certificate installed on the client devices. This ensures the client sees a valid certificate chain and does not generate a certificate warning.
What should I do if I get this PCNSE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on PCNSE
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which THREE statements are true regarding SSL Forward Proxy decryption on Palo Alto Networks firewalls?
hard- A.SSL Forward Proxy decryption can only be applied to traffic destined for TCP port 443.
- ✓ B.Decryption policy rules can match on source zone, source user, destination IP, URL category, and service.
- ✓ C.The firewall must generate a certificate on-the-fly signed by a trusted CA for each decrypted session.
- D.An 'ssl-decrypt' action in a decryption rule requires that the associated decryption profile includes a certificate for the firewall to use.
- ✓ E.The firewall can inspect the Server Name Indication (SNI) field in the ClientHello to determine the destination hostname.
Why B: Option B is correct because Palo Alto Networks decryption policy rules can match on a wide range of criteria including source zone, source user, destination IP, URL category, and service. This granularity allows administrators to selectively decrypt traffic based on business needs and security policies, not just basic IP/port matching.
Last reviewed: Jun 11, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.