NSE7 Enterprise Firewall and VDOMs Practice Question
A network admin configures inter-VDOM routing between two VDOMs on a FortiGate. The admin creates a firewall policy in VDOM A allowing traffic to VDOM B, but traffic is still not passing. What additional step is required?
⚠ Common exam trap
Many exam-takers assume a single firewall policy in the source VDOM is sufficient, but FortiGate requires policies in both VDOMs for inter-VDOM traffic to pass, mirroring the behavior of separate physical firewalls.
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
✓
Create a firewall policy in VDOM B to permit the traffic from VDOM A
Inter-VDOM routing on a FortiGate requires firewall policies in both VDOMs to permit traffic in both directions. Even if VDOM A has a policy allowing traffic to VDOM B, VDOM B must have a corresponding policy to allow the return traffic or the initial traffic from VDOM A to be processed. Without this, the FortiGate drops the packets due to asymmetric policy enforcement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure a static route in VDOM B pointing back to VDOM A
Why it's wrong here
Routing is needed but not sufficient; the firewall policy in VDOM B must permit the traffic.
- ✗
Enable inter-VDOM routing under config system global
Why it's wrong here
Inter-VDOM routing is enabled by default; no global command is needed.
- ✗
Assign the inter-VDOM link to both VDOMs
Why it's wrong here
The inter-VDOM link is automatically created; no assignment needed.
- ✓
Create a firewall policy in VDOM B to permit the traffic from VDOM A
Why this is correct
Inter-VDOM traffic requires policies on both VDOMs to allow the session. Without the return policy, the session is blocked.
Quick reference
Asymmetric Encryption Algorithm Comparison
| Algorithm | Key Exchange | Signatures | Equivalent Security Key | Notes |
|---|---|---|---|---|
| RSA-3072 | Yes | Yes | 128-bit | Widely deployed; slow for bulk data |
| ECDSA P-256 | No | Yes | 128-bit | Fast signatures; standard TLS certs |
| ECDH / ECDHE | Yes | No | 128-bit | Perfect forward secrecy in TLS 1.3 |
| DH / DHE | Yes | No | 128-bit (3072-bit key) | Replaced by ECDHE in modern TLS |
| Ed25519 | No | Yes | ~128-bit | SSH keys, modern PKI |
Go deeper
Related to this question
About these practice questions
Courseiva writes every NSE7 question from scratch — 940 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.