- A
Create an application control profile that sets 'P2P' category to 'block' and 'File Sharing' category to 'allow'
This is the core configuration to differentiate between the two categories.
- B
Set the firewall policy inspection mode to proxy-based
Why wrong: Flow-based can also work with application control if deep inspection is enabled; proxy is not strictly required.
- C
Enable SSL/TLS deep inspection on the firewall policy
Many P2P and File Sharing applications use encryption; deep inspection is needed to identify them.
- D
Ensure that the application control signatures are up to date
Up-to-date signatures are necessary to correctly identify the latest versions of applications.
- E
Apply a web filter profile to override the application control
Why wrong: Web filter does not affect application control decisions.
Quick Answer
The answer is to create an application control profile that blocks the P2P category while allowing the File Sharing category, apply it to a firewall policy with deep inspection enabled, and ensure the application control signatures are up to date. This configuration works because FortiGate’s application control engine relies on signature-based identification to distinguish between P2P and legitimate file-sharing traffic like Dropbox; without deep inspection, encrypted P2P traffic can bypass detection, and outdated signatures may misclassify applications. On the Fortinet NSE 4 exam, this scenario tests your understanding of how application control profiles interact with firewall policies and inspection modes—a common trap is assuming flow-based inspection alone can block encrypted P2P without deep inspection, or forgetting to update signatures for accurate categorization. Remember the mnemonic “PAD” for the three requirements: Profile (block P2P, allow File Sharing), Apply (to policy with deep inspection), and Database (signatures up to date).
NSE4 Security Profiles Practice Question
This NSE4 practice question tests your understanding of security profiles. 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 administrator wants to block all traffic from the 'P2P' application category but allow traffic from 'File Sharing' applications like Dropbox. Which THREE configurations are required to achieve this?
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
Create an application control profile that sets 'P2P' category to 'block' and 'File Sharing' category to 'allow'
To block P2P and allow File Sharing, the administrator needs to create an application control profile that blocks P2P category and allows File Sharing category. This profile must be applied to a firewall policy that has deep inspection enabled for encrypted traffic. Proxy-based inspection might be needed for granular control, but flow-based also works with deep inspection.
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.
- ✓
Create an application control profile that sets 'P2P' category to 'block' and 'File Sharing' category to 'allow'
Why this is correct
This is the core configuration to differentiate between the two categories.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Set the firewall policy inspection mode to proxy-based
Why it's wrong here
Flow-based can also work with application control if deep inspection is enabled; proxy is not strictly required.
- ✓
Enable SSL/TLS deep inspection on the firewall policy
Why this is correct
Many P2P and File Sharing applications use encryption; deep inspection is needed to identify them.
Related concept
Static NAT maps one inside address to one outside address.
- ✓
Ensure that the application control signatures are up to date
Why this is correct
Up-to-date signatures are necessary to correctly identify the latest versions of applications.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Apply a web filter profile to override the application control
Why it's wrong here
Web filter does not affect application control decisions.
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 NSE4 NAT questions on configuration and troubleshooting.
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Security Profiles — study guide chapter
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Security Profiles practice questions
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FAQ
Questions learners often ask
What does this NSE4 question test?
Security Profiles — This question tests Security Profiles — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create an application control profile that sets 'P2P' category to 'block' and 'File Sharing' category to 'allow' — To block P2P and allow File Sharing, the administrator needs to create an application control profile that blocks P2P category and allows File Sharing category. This profile must be applied to a firewall policy that has deep inspection enabled for encrypted traffic. Proxy-based inspection might be needed for granular control, but flow-based also works with deep inspection.
What should I do if I get this NSE4 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 NSE4 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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Last reviewed: Jun 21, 2026
This NSE4 practice question is part of Courseiva's free Fortinet certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NSE4 exam.
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