Fortinet NSE6_FNC_AD-7.6 Exam Dumps

The correct answer is D. In a Layer 3 registration or isolation network design, DHCP requests from the isolated registration VLAN are not served locally on that VLAN by a normal production DHCP server. Instead, the registration VLAN's DHCP relay must forward DHCP traffic to FortiNAC-F port2, because port2 is the captive network service interface. The study guide states that in Layer 3 captive networks, DHCP traffic is relayed to port2 from the captive networks, and that the FortiNAC-F port2 interface provides DHCP, DNS, and captive portal services for hosts assigned to those captive networks.

In the exhibit, the registration VLAN is 192.168.10.x/24, with gateway 192.168.10.254. That gateway is where the DHCP relay would be configured, but it is not the relay destination. The relay destination must be the FortiNAC-F port2 address, shown as 192.168.200.10. The corporate DHCP server 192.168.100.75 is for production network addressing, not registration isolation. The FortiNAC-F port1 address 192.168.100.20 is the administrative or production-facing interface, not the captive network service interface. Therefore, the DHCP relay should point to 192.168.200.10.

The firewall policy for an unauthorized VPN host is an isolation policy. When a remote endpoint first establishes its VPN tunnel, FortiGate assigns the client an IP address plus two DNS servers: the production DNS server as primary and the FortiNAC-F Port2 VPN-context address as secondary. Until FortiNAC-F validates the endpoint, FortiGate firewall policies restrict the client's traffic so that it can communicate only with the FortiNAC-F Port2 VPN interface.

This restriction deliberately prevents access to the primary production DNS server. Consequently, DNS resolution against the primary server fails and the endpoint falls back to the secondary DNS server---FortiNAC-F. FortiNAC-F then resolves the request toward its VPN isolation interface and presents the VPN captive portal. The user can subsequently run or download the required FortiNAC-F agent, allowing FortiNAC-F to perform identification and endpoint-compliance validation.

After successful authorization, FortiNAC-F sends the appropriate group/tag information to FortiGate, causing the host to match a different firewall policy that permits the required production resources and blocks the isolation interface.

Study Guide Reference: Advanced Features FortiGate VPN Integration VPN Host Isolation and Firewall Policies, pp. 346--354.

FortiNAC-F integration with third-party systems leverages two key capabilities: (1) native support for syslog and SNMP trap input, which allows external systems to send events to FortiNAC-F, and (2) security rules that parse these incoming events and define automated responses (remediation). Additionally, (3) administrative groups for alarm notification provide centralized visibility and logging of these third-party events, enabling coordinated response across the organization.

The incorrect options represent improper integration approaches: direct API access bypasses FortiNAC-F's security controls and event parsing mechanisms; custom security rule parsers are designed for analyzing security events from integrated security devices, not raw network traffic from third-party systems; and treating the third-party system as a managed device would require it to support the FortiNAC-F management protocol, which is not applicable for generic syslog/SNMP devices. The proper method leverages FortiNAC-F's built-in event ingestion and response capabilities.

When troubleshooting network access in FortiNAC-F, it is often necessary to verify exactly why a host has been granted a specific level of access. Since FortiNAC-F evaluates policies from the top down and assigns access based on the first match, an administrator needs a clear way to see the results of this evaluation for a specific live endpoint.

ThePolicy Details (C)view is the designated tool for this purpose. By navigating to theHosts > Hosts(or Adapter View) in the Administration UI, an administrator can search for the specific MAC address or IP of the host in question. Right-clicking on the host record reveals a context menu from whichPolicy Detailscan be selected. This view provides a real-time 'look' into the policy engine's decision for that specific host, showing theNetwork Access Policythat was matched, theUser/Host Profilethat triggered the match, and the resultingNetwork Access Configuration(VLAN/ACL) currently applied.

WhilePolicy Logs (A)provide a historical record of all policy transitions across the system, they are often too high-volume to efficiently find a single host's current state. TheConnections view (B)shows the physical port and basic status but lacks the granular policy logic breakdown. ThePort Properties (D)view shows the configuration of the switch interface itself, which is only one component of the final access determination.

'To identify which policy is currently applied to a specific endpoint, use thePolicy Detailsview. Navigate toHosts > Hosts, select the host, right-click and choosePolicy Details. This window displays the specificNetwork Access Policy, User/Host Profile, and Network Access Configuration currently in effect for that host record.' ---FortiNAC-F Administration Guide: Policy Details and Troubleshooting.

Correct Answer: FortiNAC-F must create firewall tags that are passed to FortiGate for policy enforcement

FortiNAC-F integrates with the Security Fabric by creating firewall tags based on group and tag information derived from network access policies and host profiles. These tags are passed to FortiGate, where firewall administrators can use them in access control policies to enforce segmentation and restrict access at the network perimeter.

Why other options are incorrect:

• Raw syslog messages for manual rule creation: Integration with Security Fabric is automated through tag passing, not manual syslog-based rule creation.
• SNMP trap monitoring on each FortiGate: SNMP traps are used for third-party device integration into FortiNAC-F, not for FortiGate integration or device discovery.
• VPN policies on each FortiGate: While VPN integration exists, it is for managing FortiGate VPN sessions within FortiNAC-F, not for network access policy enforcement through tags.