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Fortinet FCSS_NST_SE-7.6 Exam Syllabus Topics:

TopicDetails
Topic 1
  • System troubleshooting: This section of the exam measures the skills of Network Security Support Engineers and addresses diagnosing and correcting issues within Security Fabric setups, automation stitches, resource utilization, general connectivity, and different operation modes in FortiGate HA clusters. Candidates work with built-in tools to effectively find and resolve faults.
Topic 2
  • Security profiles: This part measures skills of Security Operations Specialists and covers identifying and resolving problems linked to FortiGuard services, web filtering configurations, and intrusion prevention systems to maintain protection across network environments.
Topic 3
  • VPN: This section is aimed at IT Professionals and includes diagnosing and addressing issues with IPsec VPNs, specifically IKE version 1 and 2, to secure remote and site-to-site connections within the network infrastructure.
Topic 4
  • Routing: This section focuses on Network Engineers and involves tackling issues related to packet routing using static routes, as well as OSPF and BGP protocols to support enterprise network traffic flow.
Topic 5
  • Authentication: This section evaluates the abilities of System Administrators and requires troubleshooting both local and remote authentication methods, including resolving Fortinet Single Sign-On (FSSO) problems for secure network access.

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Fortinet FCSS - Network Security 7.6 Support Engineer Sample Questions (Q92-Q97):

NEW QUESTION # 92
Refer to the exhibit.

The administrator did not override the FortiGuard FODN or IP address in the FortiGate configuration Which IP address did FortiGate get when resolving the servicem,fortiguard.net name?

Answer: D

Explanation:
The study guide explicitly explains the FortiGuard flags shown by diagnose debug rating:
D = Default
"IP addresses of servers received from DNS resolution"
It then clarifies even more specifically:
"D = The IP address FortiGate got when resolving the service.fortiguard.net name (usually two or three servers have this flag, if the administrator didn't overwrite the FortiGuard FQDN or IP address in the FortiGate configuration)" In the exhibit, among the answer choices, the IP address marked with the D flag is 208.91.112.194. Therefore, that is the IP FortiGate got from resolving service.fortiguard.net.
Why the other options are wrong:
B . 209.22.147.36 is not the correct choice because in the exhibit it is not the DNS-resolution entry identified by the D flag C . 64.26.151.37 has no D flag D . 96.45.33.65 has no D flag So the verified answer is: A.


NEW QUESTION # 93
Refer to the exhibit.

A partial output from an IKE real-time debug is shown
The administrator does not have access to (he remote gateway
Based on the debug output, which two conclusions can you draw? (Choose two.)

Answer: B,C

Explanation:
To determine the correct conclusions, we analyze the specific lines in the IKE real-time debug output provided in the exhibit:
Analysis for Option A (The remote peer is the initiating peer):
Evidence: The very first line of the debug output reads: ike 0:624000:98: responder: main mode get 1st message...
The keyword responder indicates that this local FortiGate is receiving the connection request. Consequently, the remote peer must be the initiator sending the request. The phrase "get 1st message" confirms the local unit is receiving the initial packet of the negotiation sequence.
Conclusion: This statement is True.
Analysis for Option B (This is a phase 1 negotiation):
Evidence: The same line mentions main mode.
In IPsec VPNs, Main Mode and Aggressive Mode are exclusively used for Phase 1 (IKE SA) negotiations. Phase 2 (Child SA) negotiations use Quick Mode. The presence of "main mode" definitively identifies this as a Phase 1 exchange.
Conclusion: This statement is True.
Analysis for Option C (There is a Diffie-Hellman group mismatch):
Evidence:
Incoming proposal (Remote): Lists type=OAKLEY_GROUP, val=MODP2048 (Group 14) in the first proposal proposal.
My proposal (Local): Lists type=OAKLEY_GROUP, val=MODP2048 (Group 14).
Since both the remote peer and the local gateway support and are proposing MODP2048 (Group 14), there is no Diffie-Hellman group mismatch. The actual mismatch visible in the logs is between the Encryption/Hash algorithms (Remote proposes AES-256/SHA2-256, while Local proposes AES-128/SHA), but the DH groups match.
Conclusion: This statement is False.
Analysis for Option D (This is a phase 2 negotiation):
As established in the analysis for Option B, "Main Mode" is a Phase 1 protocol. If this were Phase 2, the debug would show "Quick Mode".
Conclusion: This statement is False.
Reference:
FortiGate Security 7.6 Study Guide (IPsec VPN): "Phase 1 modes: Main mode and Aggressive mode." FortiOS Debugging documentation: Explains that "responder" indicates the device receiving the IKE initialization.


NEW QUESTION # 94
Refer to the exhibits.

An administrator is attempting to advertise the network configured on port3. However, FGT-A is not receiving the prefix.
Which two actions can the administrator take to fix this problem? (Choose two.)

Answer: B,C


NEW QUESTION # 95
What can cause an IKEv2 tunnel to go down after it was initially brought up successfully?

Answer: A

Explanation:
The correct answer is D .
The study guide explains that IKEv2 has two initial exchanges:
* IKE_SA_INIT
* IKE_AUTH
and then later exchanges such as:
* CREATE_CHILD_SA
It also states the roles of those exchanges:
* IKE_SA_INIT negotiates the security settings for IKE traffic
* IKE_AUTH performs mutual authentication and sets up the piggyback child SA
* CREATE_CHILD_SA creates a new child SA or rekeys an existing child SA Most importantly, the study guide explicitly says:
"By IKEv2 design, no Diffie-Hellman public key is exchanged during an IKE_AUTH exchange.
Consequently, any phase 2 Diffie-Hellman group configuration mismatch between FortiGate and the peer is experienced only during the first rekey (CREATE_CHILD_SA exchange) of the child SA created during IKE_AUTH." This proves the key idea behind the question: an IKEv2 tunnel can come up successfully first, then fail later during a CREATE_CHILD_SA rekey/renegotiation event because of a phase 2 mismatch. Among the provided options, the matching later-stage cause is mismatched quick-mode selectors during CREATE_CHILD_SA .
Why the other options are wrong:
* A is wrong because if the proposal mismatch were in the initial negotiation path, the tunnel would fail during establishment, not after it was already up. The study guide places initial tunnel establishment in IKE_SA_INIT and IKE_AUTH
* B is wrong because a mismatch in IKE_SA_INIT affects the initial establishment stage, not a tunnel that was already brought up successfully
* C is wrong because a pre-shared key mismatch is part of authentication during IKE_AUTH , so the tunnel would not come up successfully in the first place


NEW QUESTION # 96
Refer to the exhibit.

The output of diagnose sys session list command is shown.
If the HA ID for the primary device is 9, what happens if the primary fails and the secondary becomes the primary?

Answer: D

Explanation:
The output of the diagnose sys session list command provides the critical evidence needed to determine the behavior during a failover:
* Session Synchronization (synced):
* The most important indicator in the exhibit is the synced flag located in the state= line (state=may_dirty synced none app_ntf).
* In FortiOS HA (High Availability), the synced flag confirms that this specific session has been successfully synchronized from the primary device to the secondary (backup) device.
* Session synchronization (Session Pickup) ensures that if the primary unit fails, the secondary unit already has the session in its table and can resume traffic processing immediately.
* TCP State (proto_state=01):
* The output shows proto=6 (TCP) and proto_state=01.
* In the FortiGate session table, proto_state=01 for TCP indicates that the session is in the ESTABLISHED state (post-three-way handshake).
* This invalidates Option B, which claims the TCP session is not fully established.
* Failover Outcome:
* Because the session is ESTABLISHED and SYNCED, the secondary device will seamlessly take over the session upon primary failure.
* The traffic continues to flow through the new primary without requiring the user/client to restart the connection. This is the primary function of HA Session Pickup.
Why other options are incorrect:
* A: While the output shows app_ntf (Application Control notification) and may_dirty, the presence of the synced flag overrides this concern regarding failover. If the session type were not supported for failover (e.g., certain proxy sessions in older versions), it would not be marked as synced. Since it is synced, it persists.
* B: As noted, proto_state=01 means established, not "not fully established".
* D: While the kernel updates routing tables, the purpose of syncing the session is to preserve the state so it does not need to be re-evaluated as a new packet would, preventing traffic drops.
Reference:
FortiGate Security 7.6 Study Guide (High Availability): "If session pickup is enabled, the primary unit synchronizes its session table... to the backup unit. If the primary unit fails, the backup unit... continues to process the sessions with no interruption."


NEW QUESTION # 97
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