NSE7 Enterprise Firewall and VDOMs Practice Question
A FortiGate administrator needs to inspect traffic between two VLANs in the same VDOM. The administrator has configured a firewall policy that applies an antivirus profile, but traffic is passing without inspection. What should the administrator check first?
⚠ Common exam trap
The trap here is that candidates often jump to troubleshooting the antivirus profile itself (e.g., subscription, inspection mode, or scan settings) instead of verifying the fundamental policy matching, which is the first thing to check in any traffic inspection issue.
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
✓
That the firewall policy's source and destination interfaces match the VLAN interfaces
The most common reason for traffic passing without inspection in a VDOM is a misconfiguration in the firewall policy's interface matching. Since the traffic is between two VLANs, the policy must explicitly specify the correct source and destination VLAN interfaces. If the policy uses the wrong interfaces (e.g., a physical interface instead of the VLAN subinterface), the traffic will bypass the policy and its associated security profiles entirely.
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 FortiGuard subscription status
Why it's wrong here
Would not cause complete bypass.
- ✗
Whether the antivirus profile is configured to use flow-based inspection
Why it's wrong here
Both modes inspect traffic.
- ✗
The antivirus profile's scan mode
Why it's wrong here
Not likely the first check.
- ✓
That the firewall policy's source and destination interfaces match the VLAN interfaces
Why this is correct
If the policy uses wrong interfaces, traffic may be matched by a different policy or by implicit deny.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.