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| Certification Vendor: | Fortinet |
|---|---|
| Exam Name: | FCSS - Network Security 7.6 Support Engineer |
| Exam Number: | FCSS_NST_SE-7.6 |
| Exam Format: | Scenario-based questions, Multiple-choice questions |
| Related Certifications: | Fortinet Certified Professional (FCP) - Network Security Fortinet NSE 4 Network Security Professional (legacy equivalent) |
| Available Languages: | English |
| Recommended Training: | Fortinet Network Security Training |
| Exam Registration: | Fortinet Training Institute Certification Portal |
| Sample Questions: | Fortinet FCSS_NST_SE-7.6 Sample Questions |
| Exam Way: | Online proctored exam via Fortinet certification platform or authorized testing delivery systems. |
| Pre Condition: | Recommended: Fortinet Certified Professional (FCP) - Network Security or equivalent practical experience with FortiGate firewalls. |
| Official Syllabus URL: | https://training.fortinet.com |
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NEW QUESTION # 54
Refer to the exhibit.
The output of a BGO debug command is shown.
What is the most likely reason that the local FortiGate is not receiving any prefixes from its neighbors?
Answer: C
Explanation:
To identify the reason for the lack of prefixes, we must interpret the State/PfxRcd and Up/Down columns in the get router info bgp summary exhibit.
Analyze Neighbor Status:
Neighbor 10.125.0.60: State is OpenSent. This session is not established. It is stuck in the negotiation phase.
Neighbor 100.64.3.1: State is Active. This session is not established. The router is actively trying to initiate a TCP connection.
Neighbor 10.127.0.75:
Up/Down: 02:45:55. This indicates the BGP session has been Up (Established) for almost 3 hours.
State/PfxRcd: 0. This number represents the count of prefixes received. The session is fully established, but the neighbor has sent zero routes.
Determine the Cause:
Since the session with 10.127.0.75 is established, connectivity and handshakes (Options A, B, C) are not the issue for this neighbor.
The fact that it is Up but sending 0 prefixes strongly implies that the neighbor is configured to filter out its routes before sending them to the local FortiGate.
Option D correctly identifies this as a RIB-OUT (Routing Information Base - Outbound) configuration issue on the neighbor (Router 10.127.0.75), which prevents it from advertising its routes.
Reference:
FortiGate Security 7.6 Study Guide (BGP): "In the BGP summary, if the State/PfxRcd shows a number (e.g.,
0), the session is Established. A value of 0 means the peering is up, but no routes have been received, often due to route-map or prefix-list filtering on the remote peer."
NEW QUESTION # 55
A VPN tunnel is up. To monitor traffic flow, the administrator enters the following CLI commands on an SSH session on FortiGate:
# diagnose debug enable
# diagnose sniffer packet any 'udp and port 500' 4
However, the sniffer does not show any output. Assuming default configuration values, what are two possible reasons there is no output? (Choose two answers)
Answer: C,D
Explanation:
The correct answers are A and B.
The study guide says:
"If NAT-T is enabled, and there is a FortiGate located in the middle that is running NAT, the sniffer command must use a different filter. In this case, IKE traffic uses UDP port 500, but switches to UDP port 4500 during the tunnel negotiation. Additionally, ESP traffic is encapsulated inside the UDP 4500 channel." It also says:
"In some networks, UDP is blocked by firewalls or ISPs. In those cases, you can configure your VPN tunnel to use IKE over TCP in the phase 1 configuration. The default IKE TCP port is 443..." And the study guide gives the correct capture examples:
No NAT: host <remote-gw> and udp port 500
With NAT and NAT-T: host <remote-gw> and (udp port 500 or udp port 4500) So:
B is correct because with NAT Traversal enabled, the tunnel may no longer be using only UDP 500. It can move to UDP 4500, so the current filter may miss the traffic.
A is correct because the filter may need to be expanded to include UDP 4500 for NAT-T, or TCP 443 when IKE over TCP is used.
Why the other options are wrong:
C is wrong because restricting the filter to the remote peer IP can make the capture more precise, but it is not required for the sniffer to display output. The problem here is the port/protocol choice, not the lack of a host filter. The study guide examples use host filtering as an aid, not as a requirement.
D is wrong because diagnose debug enable is used to enable real-time debug output for applications, but it does not suppress or invalidate sniffer output. Sniffer capture is a separate command path. Fortinet documentation separately documents diagnose sniffer packet ... for packet capture and diagnose debug enable for debug features.
So the verified answers are: A, B.
NEW QUESTION # 56
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: A,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 # 57
Exhibit.
Refer to the exhibit, which shows a FortiGate configuration.
An administrator is troubleshooting a web filter issue on FortiGate. The administrator has configured a web filter profile and applied it to a policy; however the web filter is not inspecting any traffic that is passing through the policy.
What must the administrator do to fix the issue?
Answer: D
Explanation:
The exhibit shows a FortiGate configuration under config system fortiguard related to web filtering and FortiGuard options. There is a line:
set webfilter-force-off enable
According to official Fortinet documentation, the "webfilter-force-off" option, when enabled, causes the FortiGate to bypass web filtering for all traffic-even if a web filter profile is applied to a policy.
This override is typically used for troubleshooting or performance reasons and is documented as an explicit bypass feature.
If an administrator wants to enforce web filtering inspection, this setting must be disabled. The correct way to restore web filtering functionality is to run:
set webfilter-force-off disable
Once done, traffic passing through policies with web filter profiles will be inspected and filtered as per configuration. Other settings such as timeout or cache TTL do not bypass web filtering; they only affect operational nuances.
Reference:
FortiOS Administration Guide: Web Filtering, FortiGuard Options, "webfilter-force-off" CLI
NEW QUESTION # 58
Refer to the exhibit.
Which two observations can you make about the web filter traffic captured using the flow tool? (Choose two.)
Answer: A,D
Explanation:
Analyze the "Send to Application Layer" Message:
The most critical line in the debug output is: id=65308 ... func=av_receive ... msg="send to application layer" Meaning: This message indicates that the FortiGate kernel is handing the packet over to a user-space daemon (specifically the WAD/Proxy process, indicated by av_receive handlers) for deep inspection.
Implication: This behavior is the hallmark of Proxy-based inspection. In Flow-based inspection, the traffic is handled by the IPS engine (often within the kernel or via specific IPS handlers like ips_measure), and you would not typically see a "send to application layer" message for standard web filtering.
Evaluate Option B (Firewall Policy Mode):
Since the traffic is being sent to the application layer proxy, the Firewall Policy controlling this traffic (Policy ID 1, as seen in Allowed by Policy-1) must be configured with Inspection Mode = Proxy. If it were Flow-based, the traffic would stay in the flow path. Thus, Option B is correct.
Evaluate Option C (Web Filter Profile Mode):
In FortiOS, when a firewall policy is set to Proxy-based inspection, the security profiles (like Web Filter) applied to that policy also operate in Proxy-based inspection mode. The presence of the av_receive function confirms that the content inspection (Web Filter/AV) is being performed by the proxy engine. Thus, Option C is correct.
Why Option A is Incorrect (NPU Offload):
The output shows npu_state=0x100. In the context of a flow trace where traffic is being "sent to application layer," this confirms the session is not fully offloaded to the NPU (Network Processor). Offloaded traffic (Fast Path) is handled by the hardware and would not generate these specific CPU-level debug logs for the payload inspection phase. The proxying process requires CPU intervention.
Why Option D is Incorrect (Port Mapping):
While valid protocol mapping is necessary for inspection, the specific debug output shown is a direct result of the Inspection Mode (Proxy vs. Flow). The observation of the traffic moving to the application layer is primarily caused by the policy and profile mode settings, making B and C the direct "observations" derived from the log data.
Reference:
FortiGate Troubleshooting (Debug Flow): "If the debug flow shows msg='send to application layer', it confirms the traffic is being handled by the proxy (WAD) for Proxy-based inspection."
NEW QUESTION # 59
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