Fortinet FCSS_LED_AR-7.6 Dumps Questions Answers

The correct answer is C.

The key clue is in the port3 interface exhibit: the RADIUSAccounting administrative access option is not enabled.

The LAN Edge 7.6 Architect study guide states:

“First, you must enable RADIUS Accounting in the Administrative Access section on the FortiGate interface where you expect to receive RSSO messages.”

The FortiOS Administration Guide says the same thing more explicitly:

“In the Administrative Access section select the RADIUS Accounting checkbox. This will open listening for port 1813 on this interface. The FortiGate will then be ready to receive RADIUS accounting messages.”

The study guide also explains what those accounting messages contain:

“These messages are sent by RADIUS clients to report user session details such as start time, stop time, interim updates, and other relevant session information.”

So if port3 is the interface used for this communication, but RADIUSAccounting is not enabled on that interface, the accounting records carrying session and usage details are not handled correctly on that interface. That makes C the best answer.

Why the other options are incorrect:

A. Incorrect. If the RADIUS shared password were wrong, RSSO authentication would not be functioning correctly. The study guide says the shared secret must match the one on the RADIUS accounting server

B. Incorrect. set rsso-radius-response enable is recommended so FortiGate sends responses to the accounting sender. Fortinet documentation says this should be enabled because otherwise some RADIUS servers may resend the same accounting message repeatedly, but it does not describe this as the main cause of missing session-detail visibility

D. Incorrect. A mismatch between sso-attribute and the RSSO group’s RADIUS Attribute Value would affect user-to-group matching on FortiGate. But the question says authentication and RSSO activity are already functioning as expected, so this is not the most likely cause

Final verified conclusion:

Because port3 is the interface carrying the RSSO communication and the exhibit shows RADIUSAccounting is not enabled there, the most likely issue is:

C. Misconfigured interface port3

In FortiGate captive portal workflows (local or external):

Client connects to SSID / interface that has captive portal enabled.

Client makes an HTTP/HTTPS request.

FortiGate intercepts and redirects to alogin page(local or external URL).

The portal form is submitted viaPOSTback to FortiGate.

To prevent tampering and to tie the POST back to thecorrect user session, FortiGate includes a special hidden parameter in the redirect and expects it in the POST:

The parameter is namedmagic.

The magic value:

Is aunique tokengenerated per captive-portal session.

Encodes/session-links the user’s IP, interface, and session info.

Allows FortiGate to ensure that:

The POST comes from the user who initiated the original request.

The request is not a random or replayed submission.

When troubleshooting:

If the external portal does notpreserve and resendthe magic parameter back to FortiGate exactly as received, authentication fails, and you’ll see errors like “session not found” or “invalid magic”.

Why the other fields are not used for this purpose

A. username– Just the login ID; multiple users can use the same username from different locations, so it can’t uniquely track the browser session.

B. redir– Contains the URL the user originally requested, so they can be sent back there after login. It is not a session integrity token.

D. email– Optional field used in some guest/registration flows; irrelevant to session validation.

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.