NSE7 Troubleshooting and Diagnostics Practice Question
An administrator needs to verify that a FortiGate is correctly matching a firewall policy for traffic from 192.168.1.0/24 to 10.0.0.0/8. Which command provides a list of policies that match a given source and destination?
⚠ Common exam trap
Watch out — candidates often confuse configuration display commands like 'show firewall policy' with dynamic lookup tools that actually simulate the policy matching process.
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
✓
diagnose firewall policy lookup
The 'diagnose firewall policy lookup' command is designed to simulate a policy lookup based on specified parameters such as source IP, destination IP, and incoming interface. It returns the policy ID that would be matched, making it the ideal tool for verifying policy matching for specific traffic.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
diagnose debug flow filter
Why it's wrong here
This command sets filters for debug flow output, but it does not list policies. It is used in conjunction with debug flow to trace packets, but it does not directly answer which policy matches a given source and destination without additional steps and interpretation.
- ✗
diagnose firewall iprope list 100004
Why it's wrong here
This command lists the IP rope entries, which are used for early packet processing and do not directly show firewall policy matches. While it can be useful for troubleshooting policy routing, it does not provide a direct list of policies that match specific source and destination criteria as needed here.
- ✓
diagnose firewall policy lookup
Why this is correct
The 'diagnose firewall policy lookup' command allows the administrator to specify source and destination IP addresses, interfaces, and other parameters, and it returns the policy that matches the traffic. This is exactly what is needed to verify which policy is being applied to the given traffic.
- ✗
show firewall policy
Why it's wrong here
This command displays the entire firewall policy configuration, but it does not simulate a lookup for specific traffic. The administrator would have to manually parse the list to determine which policy matches, which is error-prone. It does not provide the dynamic matching capability needed.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Fortinet exam blueprint
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