- A
Verify that the routing table on the FortiGate includes the remote networks
Without routes to the remote networks, traffic will not be forwarded through the tunnel.
- B
Check the firewall policy to ensure it allows traffic from the VPN to internal networks
A firewall policy must explicitly permit traffic from the VPN interface to the internal network.
- C
Restart the IKE daemon on the FortiGate
Why wrong: This would disrupt existing connections and is a drastic step not suitable for initial troubleshooting.
- D
Disable NAT on the VPN policy
Why wrong: NAT is often required; disabling it may cause issues but not the primary diagnostic step.
- E
Increase the DPD retry count
Why wrong: DPD is for liveness detection; increasing retries won't help if routing or policies are wrong.
Quick Answer
The answer is to check the firewall policy and verify the routing configuration. When a VPN tunnel is established but users cannot access internal resources, the connection is up at the transport layer, but traffic is not being forwarded correctly, which typically points to either a missing route on the FortiGate or a firewall policy that is not permitting the traffic from the VPN interface to the internal network. On the Fortinet NSE 7 Advanced Security NSE7 exam, this scenario tests your understanding of the traffic flow logic: the tunnel being up does not guarantee that return routes or security policies are in place, and a common trap is to focus solely on the VPN configuration while ignoring the policy and routing tables. A reliable memory tip is to think of the VPN as a door that is unlocked—you still need a path (routing) and permission (firewall policy) to walk through to the internal resources.
NSE7 Advanced VPN and Zero Trust Practice Question
This NSE7 practice question tests your understanding of advanced vpn and zero trust. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Related concept
Static NAT maps one inside address to one outside address.
- ✓
Check the firewall policy to ensure it allows traffic from the VPN to internal networks
- ✗
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.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related NSE7 NAT questions on configuration and troubleshooting.
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Advanced VPN and Zero Trust — study guide chapter
Learn the concepts, then practise the questions
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Advanced VPN and Zero Trust practice questions
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FAQ
Questions learners often ask
What does this NSE7 question test?
Advanced VPN and Zero Trust — This question tests Advanced VPN and Zero Trust — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this NSE7 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related NSE7 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways 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: Common issues: firewall policies must allow traffic from VPN IP pool to internal network; routing must be correct; NAT should not be applied to VPN traffic (unless required). Checking these three areas typically resolves connectivity issues.
Last reviewed: Jun 21, 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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