Fortinet Fortinet NSE 5 - FortiNAC-F 7.6 Administrator NSE5_FNC_AD_7.6 Exam Dumps: Updated Questions & Answers (June 2026)

FortiNAC-F provides a robust engine for processing security notifications from third-party devices. For standard integrations, such as FortiGate or Check Point, the system comes pre-loaded with templates to interpret incoming data. However, when an administrator needs FortiNAC-F to process syslog messages from a vendor or device that is not supported by default, they must configure aSecurity Event Parser.

TheSecurity Event Parseracts as the translation layer. It uses regular expressions (Regex) or specific field mappings to identify key data points within a raw syslog string, such as the source IP address, the threat type, and the severity. Without a parser, FortiNAC-F may receive the syslog message but will be unable to " understand " its contents, meaning it cannot generate the necessarySecurity Eventrequired to trigger automated responses. Once a parser is created, the system can extract the host ' s IP address from the message, resolve it to a MAC address via L3 polling, and then apply the appropriate security rules. This allows for the integration of any security appliance capable of sending RFC-compliant syslog messages.

" FortiNAC parses the information based onpre-defined security event parsersstored in FortiNAC ' s database... If the incoming message format is not recognized, a newSecurity Event Parsermust be created to define how the system should extract data fields from the raw syslog message. This enables FortiNAC to generate a security event and take action based on the alarm configuration. " —FortiNAC-F Administration Guide: Security Event Parsers.

The correct answer is C . The exhibit shows a guest template with Login Availability set to Specify Time , allowing login only Monday through Friday from 6:00 AM to 7:00 PM . The study guide explains that the Account Duration and Login Availability fields define when the account is deleted from the database or what days and times the account is enabled. Therefore, outside the allowed login window, the guest cannot authenticate successfully using that guest account.

To stop network access outside those permitted times, FortiNAC-F must isolate hosts that are in the Not Authenticated state. The guide maps the Authentication captive network to hosts in the Not Authenticated state, and the isolation logic table shows that hosts in the Not Authenticated state are moved to the Authentication network when the point of connection is in the Forced Authentication group.

Option A is wrong because At-risk hosts are isolated to remediation/quarantine due to compliance or security posture problems, not because a guest login is outside allowed hours. Option B is wrong because Disabled hosts are intentionally disabled and sent to the dead-end network; the account here is time-restricted, not necessarily disabled. Option D is wrong because Rogue applies to unregistered or unclassified devices, while this scenario is about a known guest account that is not allowed to authenticate outside its login schedule.

In a1+1 High Availability (HA)deployment, FortiNAC-F supports two primary methods for management access: individual IP addresses or aShared IP Address(also known as a Virtual IP or VIP). The Shared IP option is part of aLayer 2 HAdesign, which simplifies administration by providing a single URL or IP that always points to whichever appliance is currently in the " Active " or " In Control " state.

For a Shared IP configuration to function correctly, thePrimary and Secondary administrative interfaces (port1) must be on the same subnet. This requirement exists because the Shared IP is a logical address that is dynamically assigned to the physical interface of the active unit. Since only one unit can own the IP at a time, both units must reside on the same broadcast domain (Layer 2) to ensure that ARP requests for the Shared IP are correctly answered and that the gateway remains reachable regardless of which unit is active. If the appliances were on different subnets (a Layer 3 HA design), a shared IP could not be used because it cannot " float " across different network segments; instead, administrators would need to manage each unit via its unique physical IP or use a FortiNAC Manager.

" For L2 HA configurations, click theUse Shared IP Addresscheckbox and enter the Shared IP Address information...If your Primary and Secondary Servers are not in the same subnet, do not use a shared IP address.The shared IP address moves between appliances during a failover and recovery and requires both units to reside on the same network. " —FortiNAC-F High Availability Reference Manual: Shared IP Configuration.

In a FortiNAC-F deployment, the configuration of theDHCP scopefor isolation networks (Registration, Remediation, etc.) must perfectly align with the underlying network infrastructure to ensure that isolated hosts can communicate with the FortiNAC appliance. In the provided exhibits, there is a clear discrepancy between theDHCP configurationand theNetwork Topology.

As shown in the " Network Topology " exhibit, theRegistration Networkresides on a router interface (or sub-interface) with the IP address192.168.180.1. This address represents the default gateway for any host placed into the Registration VLAN. However, the " DHCP configuration " exhibit shows the scope " REG-ScopeOne " configured with aGateway of 10.0.1.254. This 10.0.1.254 address belongs to the management/service network (port2 of FortiNAC), not the registration subnet. If a host in the Registration VLAN receives this incorrect gateway via DHCP, it will attempt to send all off-link traffic to an unreachable IP, preventing it from loading theCaptive Portalor communicating with the FortiNAC server.

According to theFortiNAC-F Configuration Wizard Reference, when defining a Layer 3 network scope, the " Gateway " field must contain the IP address of the router interface that acts as the gateway for that specific isolation VLAN. The FortiNAC appliance itself usually sits on a different subnet, and traffic is directed to it via the router ' s DHCP Relay (IP Helper) and DNS redirection.

" When configuring scopes for a Layer 3 network, theGatewayvalue must be the IP address of the router interface for that subnet. This allows the host to reach its local gateway to route traffic. If the gateway is misconfigured, the host will be unable to reach the FortiNAC eth1/port2 interface for registration... Ensure the Gateway matches the network topology for the isolation VLAN. " —FortiNAC-F Configuration Wizard Reference Manual: DHCP Scopes.

The correct answer is D . The question is about guest onboarding , and the exhibit shows the Guest Network using gateway 10.20.1.250 . In a Layer 3 captive network design, FortiNAC-F provides DHCP and DNS services to isolated or captive-network hosts, but the DHCP scope must still give the endpoint the correct default gateway for the network where that endpoint is placed. The study guide specifically warns that, when configuring Layer 3 captive network scopes, the administrator must think from the isolated host’s perspective for the IP pool and gateway configuration . It also states that each captive network interface configuration includes an IP address, subnet mask, default gateway, and one or more DHCP scopes.

Option A , 10.0.1.254 , is the infrastructure gateway on the FortiNAC-F service/production-side segment, not the guest network gateway. Option B , 10.0.1.110 , is the FortiNAC-F interface address shown in the diagram, not the default gateway for guest clients. Option C , 10.10.1.250 , is the gateway for the Isolation Network , not the Guest Network . Since the administrator is configuring guest onboarding, the DHCP scope for guest users must hand out 10.20.1.250 as the gateway.

The correct answer is A . In a FortiNAC-F 1+1 HA deployment, failover from primary to secondary is automatic, but failback to the primary is not automatic . The study guide states that if the primary device or its network connectivity fails, the secondary assumes control automatically, but restoration of a failed-over HA deployment is a manual administrator-driven process. It further explains that after the cause of the failover is resolved, the administrator must use the Resume Control button to transfer control back to the primary server.

That means when the primary comes back online, it does not immediately take over again. The pair can resume HA communication, but the secondary remains the in-control node until an administrator deliberately returns control to the primary. Option B is wrong because FortiNAC-F 1+1 HA is active-passive, not load-balanced. Option C is wrong because the restored primary does not power itself down for maintenance. Option D is a trap: five failed heartbeats are used in failure detection and gateway validation logic, not as an automatic failback timer. The exam point is simple: automatic failover, manual failback .

The correct answer is C . The Port Changes view is the correct troubleshooting location when FortiNAC-F changes endpoint network access, such as moving a switch port into a different VLAN. The study guide states that any time FortiNAC-F changes network access for an endpoint, the change is documented in Network > Port Changes . This view shows the date and time of the change, whether a CLI configuration was executed, the reason for the change, the role or access policy that caused it, the port that was changed, and the VLAN the port was changed to.

This directly matches the troubleshooting requirement in the question: the administrator needs to know when the VLAN change happened and why FortiNAC-F made that network access decision. Option A , Security Event view, is used for security-related events, not detailed port-level VLAN-change history. Option B , Reports view, is too broad and not the operational audit trail for a specific access change. Option D , Admin Auditing, tracks administrative actions, but an automatic policy-driven VLAN assignment is documented under Port Changes, not primarily as an admin audit event.

In FortiNAC-F, theGuest & Contractor Templateis a configuration object that defines the parameters for accounts created by sponsors or through self-registration. One of the critical security controls within this template is theLogin Availabilitysetting. This setting restricts the specific days and times during which a guest or contractor is permitted to authenticate and access the network.

As shown in the exhibit, the " StandardGuest " template hasLogin Availabilityset to " Specify Time " , with a schedule defined asMon-Fri, 6:00 AM to 7:00 PM. If a guest user attempts to connect or authenticate at8:00 PM, which is outside of the permitted window, FortiNAC-F ' s policy engine will automatically deny the authentication request. When an authentication attempt is denied due to schedule restrictions, the system does not move the host into the " Authenticated " or " Registered " state required for production access. Instead, the host ismarked as non-authenticatedin the adapter or host view.

This behavior ensures that even if a guest possesses valid credentials, their access is strictly bound by the organizational policy for visitor hours. The host will typically remain in its current isolation or registration VLAN, and the user will see a message on the captive portal indicating that their account is not currently authorized for login. It is important to distinguish this from " at-risk " (C), which relates to security scan failures, or " rogue " (B), which typically refers to unknown devices that have not yet been associated with a valid account or profiling rule.

" Login Availabilitydefines the timeframe during which the guest or contractor account is valid for network access. This schedule is enforced at the time of authentication. If a user attempts to log in outside of the designated window, the authentication is rejected by the system. Consequently, the host record will reflect anon-authenticatedstatus, and the device will remain restricted to the isolation or registration network until a valid login window is reached. " —FortiNAC-F Administration Guide: Guest and Contractor Templates Section.

The correct answer is A . The exhibit shows two adapters learned on the same wired port: one appears as a rogue/unknown host, and the other is associated with the Lab Hosts rule. The port is in both Role-Based Access and Forced Registration . FortiNAC-F state-based control takes precedence over policy-based provisioning, and the study guide states that when a rogue host connects to a port in the Forced Registration group, FortiNAC-F isolates that host by moving it into the registration captive network. The guide also explains that the Isolation network can be used as a single network for abnormal host states while still presenting state-specific portal pages.

Because this is a wired switch port using VLAN-based control, FortiNAC-F cannot put one host on the production VLAN and the other host on the isolation portal VLAN at the same time on the same access port. The VLAN change applies to the port, not independently to each MAC address behind that port. Therefore, the presence of the rogue host on a Forced Registration port causes the port to be provisioned to the isolation network. Option B is technically unrealistic for this access-port scenario. Option C is wrong because two MAC addresses alone do not make the port an uplink; FortiNAC-F uses uplink logic for infrastructure-device MACs, manually marked uplinks, or a threshold such as more than 20 MAC addresses. Option D is unrelated because Access Point Management is not triggered by learning two wired hosts on a port.

In FortiNAC-F, theSecurity Incidentsengine is used to automate responses to security threats reported by external devices. When an administrator wants to enforce a policy, such as quarantining contractors who access restricted websites, they must create aSecurity Rule. A Security Rule acts as the " if-then " logic that correlates incoming security data with the internal host database.

The documentation specifies that a Security Rule consists of three primary configurable components:

User/Host Profile:This identifieswhoorwhatthe rule applies to (in this case, " Contractors " ).

Trigger:This is theeventthat initiates the rule evaluation. In this scenario, the Trigger would be configured to match specific syslog messages or NetFlow data indicating access to prohibited websites. Triggers use filters to match vendor-specific data, such as a " Web Filter " event from a FortiGate.

Action:This defineswhathappens when the Trigger and User/Host Profile are matched. For this scenario, the administrator would select a " Quarantine " action, which instructs FortiNAC-F to move the endpoint to a restricted VLAN or apply a restrictive ACL.

While " Methods " (A) relate to authentication and " Security Strings " (E) are used for specific SNMP or CLI matching, they are not the structural components of a Security Rule in the Security Incidents menu.

" Security Rules are used to perform a specific action based on certain criteria... To configure a Security Rule, navigate toLogs > Security Incidents > Rules. Each rule requires aTriggerto define the event criteria, anActionto define the automated response (such as Quarantine), and aUser/Host Profileto limit the rule to specific groups. " —FortiNAC-F Administration Guide: Security Rules and Incident Management.