The answer is an FSSO collector agent installed on a Windows server in the domain and a properly configured LDAP server on the FortiGate. These two components are essential because the collector agent actively polls domain controllers for user logon events, while the LDAP configuration allows the FortiGate to resolve those usernames into group memberships for policy enforcement. On the Fortinet NSE 4 Network Security Professional NSE4 exam, this question tests your understanding of the FSSO polling architecture, often appearing as a two-part selection where a common trap is to forget that the FortiGate itself does not poll domain controllers directly—it relies on the collector agent. A helpful memory tip is "Collect then Connect": the collector agent gathers logon data, and LDAP connects that data to groups.
NSE4 Authentication and VPN Practice Question
This NSE4 practice question tests your understanding of authentication and vpn. 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 is configuring Active Directory polling for FSSO. Which two components must be set up correctly for FSSO to work?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A firewall policy that allows LDAP traffic from FortiGate to the domain controller
FSSO requires the FortiGate to have an FSSO agent (or collector agent) that can poll the domain controllers for logon events, and the FortiGate must have LDAP configured to resolve usernames to groups, and the polling must be enabled.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
A RADIUS server configured for user authentication
An IPsec tunnel between FortiGate and the domain controller
Why it's wrong here
No VPN is needed; FSSO typically uses local network.
✗
FortiToken license for each user
Why it's wrong here
FortiToken is for two-factor, not FSSO.
✓
A firewall policy that allows LDAP traffic from FortiGate to the domain controller
Why this is correct
FortiGate uses LDAP to query group membership information.
Related concept
Authentication checks who the user is.
✓
An FSSO collector agent installed on a Windows server in the domain
Why this is correct
The collector agent polls AD for logon events and sends them to FortiGate.
Related concept
Authentication checks who the user is.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related NSE4 questions on access control and AAA configuration.
Authentication and VPN — This question tests Authentication and VPN — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: A firewall policy that allows LDAP traffic from FortiGate to the domain controller — FSSO requires the FortiGate to have an FSSO agent (or collector agent) that can poll the domain controllers for logon events, and the FortiGate must have LDAP configured to resolve usernames to groups, and the polling must be enabled.
What should I do if I get this NSE4 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related NSE4 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. An administrator wants to use Fortinet Single Sign-On (FSSO) with Active Directory to transparently authenticate users. Which component is responsible for polling Active Directory for user logon events?
medium
A.Active Directory Domain Controller
B.FortiGate directly with NTLM authentication
C.FortiAuthenticator
✓ D.FSSO Collector Agent
Why D: The FSSO Collector Agent (or the FortiGate itself with embedded agent) polls AD for logon events.
Variation 2. A company uses Active Directory for user authentication. They want users to automatically authenticate to the FortiGate without entering credentials when accessing the internet. Which authentication method should the administrator configure?
medium
A.LDAP authentication with captive portal
B.RADIUS authentication with PAP
C.Local user authentication
✓ D.FSSO with Active Directory polling
Why D: FSSO (Fortinet Single Sign-On) polls Active Directory for user logon events and maps users to IP addresses, allowing transparent authentication without prompting for credentials.
Variation 3. An admin wants users to authenticate once via AD and have their network access controlled without repeated logins. Which feature should be used?
medium
A.Local user authentication
✓ B.FSSO with Active Directory polling
C.Captive portal with LDAP
D.SSL VPN with certificate authentication
Why B: FSSO (Fortinet Single Sign-On) captures AD logon events and maps user IP addresses to user identities, allowing transparent authentication without repeated logins.
Last reviewed: Jun 21, 2026
Question Discussion
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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.
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