NSE7 Advanced VPN and Zero Trust Practice Question
A FortiGate administrator is troubleshooting a scenario where remote users can connect to the VPN but cannot access internal resources. The VPN policy is configured correctly. Which TWO steps should the administrator take to diagnose the 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
✓
Verify that the routing table on the FortiGate includes the remote networks
Check routing and firewall policies. If the tunnel is up but traffic is not forwarded, routing may be missing or firewall policies may be blocking or not matching.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Verify that the routing table on the FortiGate includes the remote networks
Why this is correct
Without routes to the remote networks, traffic will not be forwarded through the tunnel.
- ✓
Check the firewall policy to ensure it allows traffic from the VPN to internal networks
Why this is correct
A firewall policy must explicitly permit traffic from the VPN interface to the internal network.
- ✗
Restart the IKE daemon on the FortiGate
Why it's wrong here
This would disrupt existing connections and is a drastic step not suitable for initial troubleshooting.
- ✗
Disable NAT on the VPN policy
Why it's wrong here
NAT is often required; disabling it may cause issues but not the primary diagnostic step.
- ✗
Increase the DPD retry count
Why it's wrong here
DPD is for liveness detection; increasing retries won't help if routing or policies are wrong.
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Same concept, more angles
1 more way this is tested on NSE7
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. A network administrator is troubleshooting a scenario where remote users can connect via FortiClient VPN but cannot access internal resources. The FortiGate has a valid IPsec VPN configuration. Which THREE checks should the administrator perform to resolve the issue?
medium- ✓ A.Check if there is a route on the internal network pointing back to the VPN subnet
- ✓ B.Ensure that NAT is disabled on the VPN policy
- C.Increase the MTU on the VPN interface
- D.Disable DPD on the VPN phase 1
- ✓ E.Verify that the firewall policy allows traffic from the VPN IP pool to the internal network
Why A: If the internal network lacks a route back to the VPN subnet (e.g., 10.10.10.0/24), return traffic from internal resources will be dropped or misrouted, preventing remote users from accessing those resources even though the IPsec tunnel is established. This is a classic asymmetric routing issue where the FortiGate sends traffic to the internal network, but the internal router has no path back to the VPN client IPs.
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.