Question 726 of 940
NSE7 Advanced VPN and Zero Trust Practice Question
A company uses FortiGate ZTNA to provide remote access to an internal web application. The application requires client certificates for authentication. The administrator has configured the ZTNA rule to use certificate authentication. However, users report that they are prompted for credentials repeatedly. What is the most likely cause?
⚠ Common exam trap
Candidates often assume repeated credential prompts are caused by password issues or SAML misconfiguration, but in a certificate-based ZTNA rule, the root cause is almost always a trust issue with the client certificate's CA on the FortiGate.
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
✓
The client certificate is not trusted by the FortiGate.
When a ZTNA rule is configured for certificate authentication, the FortiGate must trust the client certificate's issuing CA. If the CA certificate is not imported into the FortiGate's trusted CA list, the certificate chain validation fails, causing the authentication to be rejected and the client to be repeatedly prompted for credentials. This is the most common cause of repeated credential prompts in certificate-based ZTNA setups.
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 user's password has expired.
Why it's wrong here
Certificate authentication does not use passwords.
- ✗
The ZTNA rule is configured to use SAML authentication instead.
Why it's wrong here
The rule is set to certificate authentication.
- ✓
The client certificate is not trusted by the FortiGate.
Why this is correct
An untrusted certificate causes authentication failures.
- ✗
The FortiClient EMS server is not reachable from the client.
Why it's wrong here
EMS is not required for certificate authentication.
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Last reviewed: Jun 11, 2026
This NSE7 practice question is part of Courseiva's free Fortinet 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 NSE7 exam.
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