The most likely cause is that the protocol in the IPS profile is not enabled for the application being used. Even when a FortiGate policy has the correct IPS profile applied and the IPS engine is running, the profile itself must have the specific protocol—such as HTTP, SMTP, or FTP—toggled on for inspection; if the protocol is disabled, the engine will bypass that traffic entirely, leaving it uninspected. On the Fortinet NSE 7 Advanced Security NSE7 exam, this scenario tests your understanding that IPS profiles are protocol-aware and that a common trap is assuming a profile applied to a policy guarantees full inspection. Remember, an IPS profile is like a filter with individual protocol switches—if the switch for the traffic’s protocol is off, the engine sees nothing. Memory tip: “Profile first, protocol second—if the protocol’s off, the IPS is deaf.”
NSE7 Enterprise Firewall and VDOMs Practice Question
This NSE7 practice question tests your understanding of enterprise firewall and vdoms. 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 FortiGate administrator notices that traffic from a specific subnet is not being inspected by the Intrusion Prevention System (IPS) profile applied to the firewall policy. The policy is configured with the correct profile, and the IPS engine is enabled. 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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The protocol in the IPS profile is not enabled for the application being used
The most likely cause is that the protocol in the IPS profile is not enabled for the application being used. Even when an IPS profile is applied to a firewall policy and the IPS engine is running, the profile must have the specific protocol (e.g., HTTP, SMTP, FTP) enabled for inspection. If the protocol is disabled or not selected, the IPS engine will bypass traffic of that type, resulting in no intrusion detection or prevention for that traffic.
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 traffic is encrypted and SSL inspection is not enabled
Why it's wrong here
While SSL inspection is needed for HTTPS, the stem does not specify encryption.
✓
The protocol in the IPS profile is not enabled for the application being used
Why this is correct
IPS profiles have protocol-specific settings; if the protocol is disabled, traffic is not inspected.
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 IPS profile is configured for signature-based detection only
Why it's wrong here
Signature-based detection is the standard; this would not bypass inspection.
✗
The firewall policy is set to accept mode instead of explicit proxy
Why it's wrong here
Accept mode is not a valid configuration; the policy uses action Accept or Deny.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume an IPS profile will inspect all traffic by default once applied, overlooking the need to enable specific protocol sensors within the profile for the traffic to be inspected.
Detailed technical explanation
How to think about this question
In FortiOS, IPS profiles contain protocol-specific sensors (e.g., HTTP, SMTP, FTP, DNS) that must be individually enabled. When a protocol is disabled, the IPS engine skips all traffic matching that protocol, even if the profile is attached to the policy. This is a common misconfiguration when administrators assume that enabling the IPS profile globally activates all protocol inspections, but each protocol must be explicitly turned on within the profile's configuration.
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.
Enterprise Firewall and VDOMs — This question tests Enterprise Firewall and VDOMs — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The protocol in the IPS profile is not enabled for the application being used — The most likely cause is that the protocol in the IPS profile is not enabled for the application being used. Even when an IPS profile is applied to a firewall policy and the IPS engine is running, the profile must have the specific protocol (e.g., HTTP, SMTP, FTP) enabled for inspection. If the protocol is disabled or not selected, the IPS engine will bypass traffic of that type, resulting in no intrusion detection or prevention for that traffic.
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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