The answer is an SSL/SSH inspection profile configured with an incorrect CA certificate. This error occurs because FortiGate’s deep inspection proxy must locate the correct CA certificate to dynamically generate a signed proxy certificate for the destination server; when it cannot find the issuer for CN=www.example.com, it means the CA certificate referenced in the profile is either missing, expired, or mismatched. On the Fortinet NSE 7 Advanced Security NSE7 exam, this scenario tests your understanding of how FortiGate performs certificate re-signing during deep inspection, often appearing as a debug output trap where candidates mistakenly blame the server certificate rather than the inspection profile’s CA configuration. A common memory tip is to remember that “proxy cert failure” always points back to the CA cert in the profile, not the remote server’s cert—think “CA is the key to the proxy.”
NSE7 Troubleshooting and Diagnostics Practice Question
This NSE7 practice question tests your understanding of troubleshooting and diagnostics. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A network administrator runs the command 'diagnose debug application ssl -1' and sees the following output: 'ssl_generate_proxy_cert: cannot find CA certificate for issuer CN=www.example.com'. What is the MOST likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The SSL/SSH inspection profile is configured with an incorrect CA certificate
The error indicates that FortiGate cannot find the CA certificate used to generate a proxy certificate for the site. This happens when deep inspection is enabled but the CA certificate used for re-signing is missing or misconfigured.
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.
✗
The FortiGate does not have an internet connection to reach the CA certificate authority
Why it's wrong here
CA certificates are local to the FortiGate, not fetched from the internet.
✗
The firewall policy does not have SSL inspection enabled
Why it's wrong here
The debug output shows the inspection process is active, so SSL inspection is enabled on the policy.
✗
The web server's certificate has expired
Why it's wrong here
An expired server certificate would generate a different error, not a missing CA certificate.
✓
The SSL/SSH inspection profile is configured with an incorrect CA certificate
Why this is correct
If the CA certificate used to sign proxy certificates is missing or invalid, FortiGate cannot generate a new certificate for the inspected site.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
The debug output shows the inspection process is active, so SSL inspection is enabled on the policy.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 practitioner preparing for the NSE7 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which NSE7 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Troubleshooting and Diagnostics — This question tests Troubleshooting and Diagnostics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The SSL/SSH inspection profile is configured with an incorrect CA certificate — The error indicates that FortiGate cannot find the CA certificate used to generate a proxy certificate for the site. This happens when deep inspection is enabled but the CA certificate used for re-signing is missing or misconfigured.
What should I do if I get this NSE7 question wrong?
Identify which NSE7 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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 →
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. An administrator runs 'diagnose debug application ssl-helper -1' and sees that sessions to certain HTTPS sites are being terminated by the FortiGate. What is the MOST likely cause?
medium
A.The FortiGate's certificate authority (CA) certificate has expired, causing SSL inspection to fail
B.The antivirus profile is blocking the HTTPS connections due to a virus signature match
✓ C.The FortiGate is performing TCP RST injection due to a mismatch in the SSL/TLS handshake as part of deep inspection
D.The SSL deep inspection policy is set to 'certificate-inspection' which blocks sessions with mismatched certificates
Why C: Option B is correct because ssl-helper is involved in deep inspection and can terminate sessions by sending RST packets when handshake issues are detected.
Last reviewed: Jun 21, 2026
Question Discussion
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