NSE7 Enterprise Firewall and VDOMs Practice Question
A FortiGate is configured with multiple VDOMs. The administrator needs to allow traffic from a VDOM named 'CustomerA' to reach a server in VDOM 'SharedServices'. Both VDOMs are on the same FortiGate. Which configuration is necessary?
⚠ Common exam trap
Many candidates think a VDOM link is mandatory for inter-VDOM communication, but FortiOS actually allows direct policy-based routing between VDOMs once inter-VDOM routing is enabled globally, making the VDOM link optional.
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
✓
Enable inter-VDOM routing and create policies allowing traffic between the VDOMs
Inter-VDOM routing is required to route traffic between VDOMs on the same FortiGate. This is enabled globally via the CLI command 'config system global' and 'set inter-vdom-routing enable'. Once enabled, you must create firewall policies between the VDOMs (using the VDOM link or directly referencing the VDOMs in policies) to permit the traffic. Without inter-VDOM routing, VDOMs are isolated Layer 3 domains and cannot communicate.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Place both VDOMs in the same ADOM in FortiManager
Why it's wrong here
ADOMs are for management, not for routing.
- ✓
Enable inter-VDOM routing and create policies allowing traffic between the VDOMs
Why this is correct
Inter-VDOM routing is required, and policies control the flow.
- ✗
Create a VDOM link between the two VDOMs
Why it's wrong here
VDOM links are an alternative method but not the only way; inter-VDOM routing can be used directly.
- ✗
Configure the FortiGate in transparent mode
Why it's wrong here
Transparent mode does not affect inter-VDOM routing.
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