The answer is to change the default administrative port and restrict administrative access to trusted hosts. Changing the default port from 443 to a non-standard port reduces the risk of automated scanning tools easily discovering the management interface, while configuring a trusted host list ensures that only specific source IP addresses can initiate administrative sessions via HTTPS, SSH, or Telnet. On the Fortinet NSE 4 exam, this question tests your understanding of foundational access control principles, often appearing alongside common traps like confusing trusted hosts with firewall policies or assuming port changes alone are sufficient. A solid memory tip is to think of the "two locks" approach: change the port to hide the door, then restrict the key holders to trusted hosts.
NSE4 System and Network Administration Practice Question
This NSE4 practice question tests your understanding of system and network administration. 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.
Which TWO configuration changes can reduce the risk of unauthorized administrative access to a FortiGate?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Restrict administrative access to trusted hosts
Restricting administrative access to trusted hosts (Option B) is a fundamental security best practice that limits the source IP addresses allowed to connect to the FortiGate management interface. By configuring a trusted host list, the FortiGate will only accept administrative sessions (e.g., HTTPS, SSH, or Telnet) from specified IP addresses or subnets, effectively blocking all unauthorized sources. This reduces the attack surface and prevents brute-force or credential-stuffing attacks from untrusted networks.
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.
✗
Use the default 'admin' account for all administrators
Why it's wrong here
Using default accounts is a security risk.
✓
Restrict administrative access to trusted hosts
Why this is correct
Limits source IPs that can initiate admin sessions.
Related concept
Read the scenario before looking for a memorised answer.
✓
Change the default administrative port
Why this is correct
Changing default ports reduces exposure to automated attacks.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set a simple password for ease of use
Why it's wrong here
Simple passwords increase risk of unauthorized access.
✗
Disable both HTTPS and HTTP administrative access
Why it's wrong here
This would only leave SSH, but disabling all HTTPS/HTTP is not required to reduce risk.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think disabling HTTPS entirely is a valid security measure, but the NSE4 exam expects you to recognize that HTTPS must remain enabled for secure remote GUI access, and that disabling both HTTP and HTTPS would render the web interface inaccessible, which is not a recommended security practice.
Detailed technical explanation
How to think about this question
The trusted host feature in FortiGate uses an access control list (ACL) that is evaluated before authentication; if the source IP does not match any trusted host entry, the connection is dropped at the TCP level without consuming authentication resources. Changing the default administrative port (Option C) is effective against automated scanners that target well-known ports (e.g., 443 for HTTPS), but it is not a substitute for proper access control—it only provides security through obscurity. In real-world deployments, combining trusted hosts with port changes and strong authentication (e.g., two-factor authentication) provides defense-in-depth against unauthorized access.
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 network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
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.
System and Network Administration — This question tests System and Network Administration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Restrict administrative access to trusted hosts — Restricting administrative access to trusted hosts (Option B) is a fundamental security best practice that limits the source IP addresses allowed to connect to the FortiGate management interface. By configuring a trusted host list, the FortiGate will only accept administrative sessions (e.g., HTTPS, SSH, or Telnet) from specified IP addresses or subnets, effectively blocking all unauthorized sources. This reduces the attack surface and prevents brute-force or credential-stuffing attacks from untrusted networks.
What should I do if I get this NSE4 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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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.
Question Discussion
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