This NSE7 practice question tests your understanding of advanced threat protection. 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 why a custom IPS signature is not triggering on traffic matching the pattern. Which TWO checks should be performed?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Confirm the IPS sensor is applied to the correct firewall policy
Custom IPS signatures must be enabled in the IPS sensor and applied to a firewall policy that processes the traffic.
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.
✗
Check the signature's severity level in the IPS sensor
Why it's wrong here
Severity affects logging, not triggering.
✗
Ensure the FortiGate is in proxy-based inspection mode
Confirm the IPS sensor is applied to the correct firewall policy
Why this is correct
Without policy attachment, no inspection occurs.
Related concept
Static NAT maps one inside address to one outside address.
✗
Verify the signature uses correct protocol decoder
Why it's wrong here
Protocol decoder is part of signature definition, but if it's wrong, it's a design issue, not a check.
✓
Verify that the custom signature is enabled in the IPS sensor
Why this is correct
If disabled, it will not trigger.
Related concept
Static NAT maps one inside address to one outside address.
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.
Advanced Threat Protection — This question tests Advanced Threat Protection — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Confirm the IPS sensor is applied to the correct firewall policy — Custom IPS signatures must be enabled in the IPS sensor and applied to a firewall policy that processes the traffic.
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.
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Question Discussion
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