The correct answer is to configure a security policy with source and destination interfaces set to the bridge, action ACCEPT, and a web filter profile applied. This is required because a FortiGate in transparent mode operates as a Layer 2 bridge, meaning it does not route traffic between different interfaces but instead forwards frames through a single bridge interface. Consequently, any security policy inspecting traffic between the two broadcast domains must use that same bridge interface for both source and destination, ensuring the web filter can inspect HTTP traffic flowing across the bridge. On the Fortinet NSE 7 Advanced Security NSE7 exam, this concept tests your understanding of how transparent mode fundamentally alters policy construction compared to NAT or routed mode. A common trap is selecting a policy with different interfaces or forgetting that the action must be ACCEPT to allow inspection; a deny action would block traffic entirely. Memory tip: In transparent mode, think “bridge both sides, same interface for the ride.”
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.
An enterprise deploys a FortiGate in transparent mode to bridge two broadcast domains. The administrator needs to apply a web filter to HTTP traffic between these domains. Which configuration is required?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a security policy with source and destination interfaces as the bridge, action ACCEPT, and a web filter profile
In transparent mode, FortiGate bridges traffic at Layer 2, so security policies must use the bridge interface as both source and destination. Option B correctly configures a security policy with source and destination interfaces set to the bridge, action ACCEPT, and a web filter profile applied. This allows the FortiGate to inspect HTTP traffic between the two broadcast domains and apply the web filter.
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.
✗
Apply the web filter profile directly to the bridge interface
Why it's wrong here
Profiles are applied via policies, not directly to interfaces.
✓
Configure a security policy with source and destination interfaces as the bridge, action ACCEPT, and a web filter profile
Why this is correct
Correct.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable web filtering globally under Config -> Features
Why it's wrong here
Web filtering must be applied per policy, not globally.
✗
Create a policy with action SET_PERMIT and enable web filtering
Why it's wrong here
There is no SET_PERMIT action.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think web filter profiles can be applied directly to interfaces (like in NAT/route mode) or that global settings enable filtering, but in transparent mode, all Layer 7 inspection must be configured via security policies with the bridge interface as both source and destination.
Detailed technical explanation
How to think about this question
In transparent mode, FortiGate acts as a Layer 2 bridge, forwarding frames based on MAC addresses while inspecting traffic at higher layers. Security policies in transparent mode require the bridge interface to be both source and destination, and the web filter profile is applied in the policy's security profiles section. A common real-world scenario is deploying a FortiGate between a switch and a router to filter web traffic without changing the IP addressing scheme.
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: Configure a security policy with source and destination interfaces as the bridge, action ACCEPT, and a web filter profile — In transparent mode, FortiGate bridges traffic at Layer 2, so security policies must use the bridge interface as both source and destination. Option B correctly configures a security policy with source and destination interfaces set to the bridge, action ACCEPT, and a web filter profile applied. This allows the FortiGate to inspect HTTP traffic between the two broadcast domains and apply the web filter.
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.
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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