- A
The source interface or destination interface is incorrectly configured
Why wrong: Incorrect interfaces would also prevent matching, but typically policy lookup uses the interface pair. However, the zero hit count suggests a higher priority policy is matching.
- B
The policy has a schedule that does not match the current time
Why wrong: While possible, a schedule mismatch would be less common than a precedence issue.
- C
The policy is placed below a more specific or broader policy that matches the same traffic
Since the hit count is zero, the traffic is being matched by an earlier policy. The policy order determines which policy is used first.
- D
The FortiGate has a routing issue preventing traffic from reaching the internet
Why wrong: A routing issue would cause packets to be dropped after matching a policy, but the hit count would still increment.
Quick Answer
The answer is that the policy is placed below a more specific or broader policy that matches the same traffic. This occurs because FortiGate firewall policies are evaluated sequentially from top to bottom, and the first matching policy is applied; a hit count of zero on a firewall policy indicates that the traffic never reached that rule, meaning a policy above it in the sequence is already matching and processing the traffic. On the Fortinet NSE 4 Network Security Professional NSE4 exam, this scenario tests your understanding of policy order and the use of the diagnose firewall iprope list command to verify rule matching, with a common trap being that administrators assume a zero hit count means the rule is misconfigured rather than simply bypassed. A useful memory tip is to think of firewall policies like a bouncer at a club: the first bouncer who sees your ID lets you in, and the bouncers further down the line never get a chance to check you.
NSE4 Firewall Policies and NAT Practice Question
This NSE4 practice question tests your understanding of firewall policies and nat. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 network administrator has configured a firewall policy allowing traffic from the internal network (10.0.0.0/8) to the internet. Users report that some websites are not loading. The administrator runs 'diagnose firewall iprope list 100000' and sees the policy listed with a hit count of zero. What is the MOST likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
The policy is placed below a more specific or broader policy that matches the same traffic
The hit count of zero indicates the policy is not being matched. Policy order matters; if a policy above this one matches the traffic, this policy will never be used. The administrator should check if a policy above is matching the traffic first.
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.
- ✗
The source interface or destination interface is incorrectly configured
Why it's wrong here
Incorrect interfaces would also prevent matching, but typically policy lookup uses the interface pair. However, the zero hit count suggests a higher priority policy is matching.
- ✗
The policy has a schedule that does not match the current time
Why it's wrong here
While possible, a schedule mismatch would be less common than a precedence issue.
- ✓
The policy is placed below a more specific or broader policy that matches the same traffic
Why this is correct
Since the hit count is zero, the traffic is being matched by an earlier policy. The policy order determines which policy is used first.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
The FortiGate has a routing issue preventing traffic from reaching the internet
Why it's wrong here
A routing issue would cause packets to be dropped after matching a policy, but the hit count would still increment.
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 NSE4 NAT questions on configuration and troubleshooting.
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Firewall Policies and NAT — study guide chapter
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FAQ
Questions learners often ask
What does this NSE4 question test?
Firewall Policies and NAT — This question tests Firewall Policies and NAT — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The policy is placed below a more specific or broader policy that matches the same traffic — The hit count of zero indicates the policy is not being matched. Policy order matters; if a policy above this one matches the traffic, this policy will never be used. The administrator should check if a policy above is matching the traffic first.
What should I do if I get this NSE4 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 NSE4 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
This NSE4 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 NSE4 exam.
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