The answer is a service mismatch, specifically that the FortiGate policy allows HTTP but HTTPS fails because the service object 'HTTP' only includes TCP port 80, not port 443. When users from 10.0.1.0/24 can ping web servers at 10.0.2.0/24 but cannot access them, it confirms routing and connectivity are functional, isolating the issue to the firewall policy’s service definition. On the Fortinet NSE 7 Advanced Security NSE7 exam, this scenario tests your understanding of how FortiGate service objects map to specific ports and protocols, a common trap where administrators assume HTTP covers all web traffic. The ping success rules out IP connectivity problems, forcing you to focus on the policy’s permitted services. A reliable memory tip: “Ping works, web fails? Check the port—HTTP is 80, HTTPS is 443, and they are not the same service.”
NSE7 Troubleshooting and Diagnostics Practice Question
This NSE7 practice question tests your understanding of troubleshooting and diagnostics. 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.
Exhibit
Refer to the exhibit.
```
config firewall policy
edit 1
set name "Allow Web"
set srcintf "port1"
set dstintf "port2"
set srcaddr "10.0.1.0/24"
set dstaddr "10.0.2.0/24"
set action accept
set schedule "always"
set service "HTTP"
set logtraffic all
next
end
```
An administrator applies the above policy but users from 10.0.1.0/24 cannot access web servers at 10.0.2.0/24. However, they can ping the servers. 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.
Refer to the exhibit.
```
config firewall policy
edit 1
set name "Allow Web"
set srcintf "port1"
set dstintf "port2"
set srcaddr "10.0.1.0/24"
set dstaddr "10.0.2.0/24"
set action accept
set schedule "always"
set service "HTTP"
set logtraffic all
next
end
```
A
The service 'HTTP' does not include port 443 or the web application is using HTTPS.
The service 'HTTP' only covers port 80; if the web server uses HTTPS (port 443), the policy won't match.
B
The destination address is incorrect.
Why wrong: The policy specifies 10.0.2.0/24, which matches the servers.
C
The schedule 'always' is not correctly configured.
Why wrong: 'always' is a valid schedule that applies at all times.
D
The source interface is incorrect.
Why wrong: The policy specifies port1, and if users are on port1, it should match.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The service 'HTTP' does not include port 443 or the web application is using HTTPS.
The policy allows HTTP traffic (port 80), but the web servers are likely using HTTPS (port 443). Since the service object 'HTTP' in FortiGate typically only includes TCP/80, HTTPS traffic is denied by default. The administrator can ping the servers because ICMP is permitted by an implicit or explicit policy, confirming that routing and connectivity are functional.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 service 'HTTP' does not include port 443 or the web application is using HTTPS.
Why this is correct
The service 'HTTP' only covers port 80; if the web server uses HTTPS (port 443), the policy won't match.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The destination address is incorrect.
Why it's wrong here
The policy specifies 10.0.2.0/24, which matches the servers.
✗
The schedule 'always' is not correctly configured.
Why it's wrong here
'always' is a valid schedule that applies at all times.
✗
The source interface is incorrect.
Why it's wrong here
The policy specifies port1, and if users are on port1, it should match.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume 'HTTP' covers all web traffic, but FortiGate strictly matches the defined ports in the service object, so HTTPS (port 443) is blocked unless explicitly permitted.
Detailed technical explanation
How to think about this question
FortiGate policies match traffic based on source/destination interface, address, service (port/protocol), and schedule. The service object 'HTTP' by default includes only TCP port 80, not 443. HTTPS traffic (TCP/443) requires a separate service object or a custom service. Ping uses ICMP, which is often allowed by a separate policy or an implicit permit, explaining why ICMP succeeds while HTTP/HTTPS fails.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Troubleshooting and Diagnostics — This question tests Troubleshooting and Diagnostics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The service 'HTTP' does not include port 443 or the web application is using HTTPS. — The policy allows HTTP traffic (port 80), but the web servers are likely using HTTPS (port 443). Since the service object 'HTTP' in FortiGate typically only includes TCP/80, HTTPS traffic is denied by default. The administrator can ping the servers because ICMP is permitted by an implicit or explicit policy, confirming that routing and connectivity are functional.
What should I do if I get this NSE7 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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?
Read the scenario before looking for a memorised answer.
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