FCSS_LED_AR-7.6 Exam Dumps - Fortinet Certified Solution Specialist Questions and Answers

The SSL-VPN configuration hasRequire Client Certificateenabled. When this is enabled, FortiOS performs two checks:

Normal user authentication(username/password or PKI user)

Additional client certificate check– the client certificatemust be signed by a CA that FortiGate trusts

FortiOS documentation for “SSL VPN with certificate authentication” states:

“The client certificate only needs to be signed by a known CA in order to pass authentication.”

“The CA certificate is the certificate that signed both the server certificate and the user certificate… The CA certificate is available to be imported on the FortiGate.”

The debug output shows key lines:

__quick_check_peer-CA does not match.

Issuer of cert depth 0 is not detected in CMDB.

This tells us:

FortiGatedoes see the user’s certificate,

Butcannot find the issuing CAin its local CA certificate store (“CMDB” = configuration database).

This means theCA that signed the user certificate has not been importedinto FortiGate.

Now evaluate the options:

A. Enable Redirect HTTP to SSL-VPN– affects only redirection from HTTP to HTTPS; it has nothing to do with certificate validation.

B. Import the CA that signed the SSL VPN Server Certificate– the server certificate is already working (the portal comes up) and its CA is not what the debug complains about; the error is about thepeer (user) certificate. Often the same CA signs both, but the failing check specifically says the issuer of the client cert is not in CMDB.

C. Set the user certificate as the Server Certificate– incorrect; server and client certificates serve different roles.

D. Import the CA that signed the user certificate to FortiGate– this directly addresses the debug error and aligns with the documented requirement that the CA which issued the user certificate must be known to FortiGate.

The FortiOS documentation explicitly states that a CSR used for certificate signing must contain accurate and valid fields, especially:

Common Name (CN)

Organization (O)

Country (C)

Public key parameters

According to the FortiGate certificate section:

Incorrect CSR field information can cause the CA to reject the request.

Reasons include:

The CA validates identity and organizational information.

Missing or malformed data invalidates PKI requirements.

The CSR is not corrected automatically by the CA.

Therefore:

✔A is correct.

Options B–D contradict PKI principles:

B is false: CAs do not issue certificates with mismatched identity fields for public trust.

C is false: CSR fields are not only for internal use; they define certificate identity.

D is false: CAs do not auto-correct CSR fields.

FortiLink NACis the NAC (Network Access Control) engine built into FortiGate when it manages FortiSwitch devices.

It performs:

✔Automated device onboarding

Automatically detects new devices connecting to switches.

Uses MAC, vendor, DHCP fingerprinting, or IoT database to classify devices.

No manual VLAN assignment required.

✔Security posture verification

Works with FortiClient EMS, ZTNA tags, IoT detection.

Applies policies based on:

Device type

User role

Endpoint compliance

IoT vulnerability status

✔Dynamic VLAN assignment

Automatically moves devices into proper VLANs, quarantine networks, or guest zones.

✔Integration with LAN Edge & Zero Trust

Uses FortiGate + FortiSwitch + FortiAP to enforce zero-trust access.

This matches the LAN Edge 7.6 Architect explanation of FortiLink NAC.

❌Why other answers are wrong

A. Extend security policies across FortiGate firewalls

Not NAC. That refers to Security Fabric or SD-WAN.

C. Apply manual firewall rules

FortiLink NAC is specifically designed toautomateaccess control.

D. Manually place devices in VLANs

NAC eliminates manual VLAN assignment — it is dynamic.

The correct answer is D.

The LAN Edge 7.6 Architect study guide states: “Note that suppression of rogue APs is becoming increasingly more difficult, because new wireless security standards are beginning to mandate management frame protection (802.11w). This requires that clients authenticate management frames as being legitimate, preventing spoofing attacks. Because rogue suppression is a form of spoofing attack, an AP that the client is not connected to is trying to send deauthentication frames and, as a result, 802.11w prevents the client from taking notice of the dedicated monitoring AP.”

This exactly matches option D. Rogue AP suppression relies on spoofed deauthentication behavior, and 802.11w protects management frames, making that suppression method less effective.

Why the other options are incorrect:

A. Incorrect. The study guide does not say 802.11w makes suppression harder because of processing overhead. It specifically points to management frame protection and spoofing prevention

B. Incorrect. The study guide does not mention reduced wireless range as the reason.

C. Incorrect. The issue is not data traffic encryption. The study guide specifically refers to authentication of management frames, not general traffic encryption