The correct action is to add SMTP to the SSL inspection profile, enabling decryption and scanning of the encrypted email traffic. This is critical because while the FortiGate’s antivirus profile was configured to scan SMTP, the corporate mail server used STARTTLS to receive the spear-phishing email, encrypting the payload before it reached the inspection engine. Without SMTP included in the SSL inspection profile, the FortiGate cannot decrypt the SMTP stream, leaving ransomware hidden inside the encrypted tunnel—even though the VPN policy had SSL inspection enabled for other services. On the Fortinet NSE 7 Advanced Security NSE7 exam, this scenario tests your understanding that SSL inspection profiles are service-specific; a common trap is assuming “SSL inspection enabled for all traffic” covers SMTP, but it only applies to services explicitly listed. The core concept is that antivirus scanning is useless against encrypted threats if the corresponding protocol isn’t decrypted first. Memory tip: “If it’s encrypted, it’s not inspected—add the service to the profile to see the threat.”
NSE7 Advanced Threat Protection Practice Question
This NSE7 practice question tests your understanding of advanced threat protection. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 large enterprise uses FortiGate as their perimeter firewall with ATP features enabled. They have a mix of internal users and remote VPN users. Recently, several remote users reported that their machines became infected with ransomware after connecting to the VPN. The IT team suspects that the ransomware entered through the VPN tunnel. The FortiGate has an antivirus profile applied to the VPN policy with SSL inspection enabled for all traffic. However, the logs show that no malware was detected. Upon investigation, the team finds that the remote users' machines are not managed by the company and do not have any endpoint protection. The ransomware was delivered via a spear-phishing email that the users opened on their remote machines. The email traffic passed through the VPN tunnel to the corporate mail server first, then back to the user. The FortiGate antivirus profile is configured to scan SMTP traffic but the email was sent from an external source to the corporate mail server, and the mail server uses STARTTLS to receive emails. The FortiGate does not perform SSL inspection on the SMTP traffic because the SMTP service is not included in the SSL inspection profile. What action should the administrator take to prevent this in the future?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add SMTP to the SSL inspection profile to decrypt and scan email traffic
Option B is correct because the FortiGate's antivirus profile is configured to scan SMTP traffic, but the email was encrypted via STARTTLS, and SMTP is not included in the SSL inspection profile. By adding SMTP to the SSL inspection profile, the FortiGate can decrypt the SMTP traffic, allowing the antivirus engine to inspect the email content for malware, including ransomware delivered via spear-phishing.
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.
✗
Disable STARTTLS on the corporate mail server to force plaintext SMTP
Why it's wrong here
This weakens security and is not a best practice.
✓
Add SMTP to the SSL inspection profile to decrypt and scan email traffic
Why this is correct
This allows the antivirus to inspect encrypted SMTP traffic and detect malware.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Require remote users to install endpoint protection with FortiClient
Why it's wrong here
This is not directly enforceable via FortiGate configuration.
✗
Block all SMTP traffic from remote VPN users
Why it's wrong here
This would prevent legitimate email access and is too restrictive.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume the antivirus profile is sufficient because it is applied to the VPN policy and includes SMTP scanning, but they overlook that SSL inspection must be explicitly configured for the SMTP service to decrypt STARTTLS-encrypted traffic before scanning can occur.
Detailed technical explanation
How to think about this question
STARTTLS is an SMTP extension that upgrades a plaintext connection to an encrypted TLS session, commonly on port 587 or 25. FortiGate's SSL inspection profile must explicitly include the SMTP service (typically port 25, 465, or 587) to intercept and decrypt this traffic; otherwise, the antivirus scanner sees only encrypted payloads and cannot detect malware. In real-world scenarios, many enterprises overlook adding SMTP to SSL inspection because they assume email traffic is already inspected by the mail server, but perimeter inspection is critical for detecting threats that bypass server-side filters.
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 practitioner preparing for the NSE7 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
Advanced Threat Protection — This question tests Advanced Threat Protection — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add SMTP to the SSL inspection profile to decrypt and scan email traffic — Option B is correct because the FortiGate's antivirus profile is configured to scan SMTP traffic, but the email was encrypted via STARTTLS, and SMTP is not included in the SSL inspection profile. By adding SMTP to the SSL inspection profile, the FortiGate can decrypt the SMTP traffic, allowing the antivirus engine to inspect the email content for malware, including ransomware delivered via spear-phishing.
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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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