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| Certification Vendor: | Fortinet |
|---|---|
| Exam Name: | FCSS - Network Security 7.6 Support Engineer |
| Exam Number: | FCSS_NST_SE-7.6 |
| Real Exam Qty: | 40 |
| Passing Score: | Pass/Fail (No specific score published) |
| Available Languages: | English, Japanese |
| Exam Price: | USD 200 |
| Exam Duration: | 75 minutes |
| Exam Format: | Multiple-choice |
| Certificate Validity Period: | 2 years |
| Related Certifications: | FCSS in Network Security |
| Sample Questions: | Fortinet FCSS_NST_SE-7.6 Sample Questions |
| Exam Way: | Pearson VUE (Online or Onsite) |
| Pre Condition: | Recommended NSE 4 and NSE 5 certifications. |
| Official Syllabus URL: | https://training.fortinet.com/local/staticpage/view.php?page=nse_certs |
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NEW QUESTION # 109
Refer to the exhibit.
If the default settings are m place, what can you conclude about the conserve mode shown in the exhibit?
Answer: C
Explanation:
The exhibit shows:
memory conserve mode: on
memory used: 2706 MB 89% of total RAM
memory used threshold red: 2675 MB 88% of total RAM
memory used + freeable threshold extreme: 2887 MB 95% of total RAM
The study guide states that the default thresholds are:
Extreme = 95%
Red = 88%
Green = 82%
So this FortiGate is in conserve mode because memory usage is 89%, which is above the red threshold (88%), but it has not yet reached the extreme threshold (95%).
The study guide then explains exactly what happens during conserve mode:
"For traffic that requires proxy-based inspection (and if memory usage has not exceeded the extreme threshold):
config system global
set av-failopen [off | pass | one-shot]
...
pass (default): All new sessions pass without inspection"
It also says:
"The av-failopen setting also applies to flow-based antivirus inspection." And the same page adds:
"If memory usage exceeds the extreme threshold, all new sessions that require inspection (flow-based or proxy-based) are blocked." Therefore, with default settings and with memory usage below the extreme threshold, FortiGate is allowing new sessions that require inspection, but bypassing inspection. That matches C.
Why the other options are wrong:
A is wrong because the default behavior is not to block proxy-based inspected sessions; the default is pass, meaning they pass without inspection B is wrong because if memory rises another 6%, it reaches 95%, which is the extreme threshold. At that point, the study guide says all new sessions that require inspection are blocked D is wrong because FortiGate blocks all new inspected sessions only when memory usage exceeds the extreme threshold, and the exhibit shows it is currently at 89%, not 95%
NEW QUESTION # 110
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
NEW QUESTION # 111
What are two reasons you might see iprope_in check () check failed, drop when using the debug How? (Choose two.)
Answer: A,C
Explanation:
The debug flow message iprope_in_check() check failed, drop specifically indicates a failure in the Local-In Policy check. The "iprope" (IP ROouting Policy Enforcement) engine handles policy lookups. The _in_check suffix confirms that the decision is regarding traffic destined to the FortiGate itself (Local-In traffic), rather than traffic passing through it.
D . The packet was dropped because the requested service is not enabled on FortiGate:
This is the most common cause. When a packet arrives destined for the FortiGate's interface IP (e.g., an HTTPS or SSH request), the kernel checks if that specific service is enabled in the interface settings (set allowaccess). If the service is not enabled (e.g., trying to Ping an interface where PING access is disabled), the iprope_in_check function fails and drops the packet immediately.
C . The packet was dropped because the trusted host list is misconfigured:
Even if the service (e.g., HTTPS) is enabled on the interface, the FortiGate checks the Administrator settings. If Trusted Hosts are configured, the source IP of the incoming packet is compared against the allowed list. If the IP is not on the list, the Local-In policy check (iprope_in_check) fails, and the packet is dropped to secure the management plane.
Why other options are incorrect:
A: If traffic is dropped by a standard Firewall Policy (traffic passing through the device from one interface to another), the debug message will typically state denied by policy x or no matching policy. It would generally be a forward check (iprope_fwd_check or similar), not an _in_check.
B: If there is no route to the source, the error is a Reverse Path Forwarding (RPF) failure. The debug flow logs this explicitly as reverse path check fail, drop.
Reference:
FortiGate Troubleshooting Guide (Debug Flow): "The message iprope_in_check() check failed indicates the packet was denied by the Local-In policy. This occurs when traffic destined to the FortiGate is not allowed by the allowaccess configuration or is blocked by Trusted Host settings."
NEW QUESTION # 112
Refer to the exhibit.
A network topology and a partial routing table are shown.
FortiGate has already been configured with a firewall policy that allows all ICMP traffic to flow from port1 to port3.
Which two changes can the administrator perform to ensure the server at 10.4.0.1/24 receives the ICMP echo reply from the laptop at 10.1.0.1/24? (Choose two.)
Answer: B,D
Explanation:
The correct answers are A and C .
The study guide describes this exact asymmetric ICMP scenario. It states:
"The server sends an echo request to the PC through port2 of the local router, effectively bypassing FortiGate. When it receives the echo request, the PC responds with an echo reply through its default gateway, 10.1.0.2, which is port1 on FortiGate. Because there is no existing session, the echo reply is dropped. All subsequent echo replies are blocked." That means the current problem exists because:
* the ICMP request bypasses FortiGate
* the ICMP reply goes through FortiGate
* FortiGate has no matching session , so it drops the reply
The study guide then shows the exact corrective option:
"Allowing asymmetric routing:"
config system settings
set asymroute enable
end
It further explains:
"After the packet passes through the FortiGate CPU, FortiGate forwards the packet using the FIB, even though there are no session matches. FortiGate forwards all subsequent echo replies using the FIB." So A is correct.
The other valid fix is to make the traffic symmetric by changing the laptop's default gateway so the reply no longer goes through FortiGate. In the exhibit, the alternate gateway is 10.1.0.254 , which is the local router on the same subnet. If the laptop uses 10.1.0.254 instead of 10.1.0.2, the ICMP echo reply follows the same bypass path as the echo request, so the server receives it without involving FortiGate session validation. This makes C correct.
Why the other options are wrong:
* B is wrong because this is not an RPF problem. The study guide explains RPF as a reverse path lookup used to validate whether a packet arrived on a legitimate interface, mainly for spoofing protection. The issue in this scenario is a missing session due to asymmetric routing , not a strict-versus-feasible RPF failure
* D is wrong because FortiGate already has the specific route 10.4.0.0/24 through port3 in the routing table shown in the exhibit, so adding a default static route to port3 is unnecessary and not the reason the echo reply is being dropped So the verified answers are: A, C .
NEW QUESTION # 113
What are two reasons you might see iprope_in_check() check failed, drop when using the debug flow?
(Choose two.)
Answer: C,D
NEW QUESTION # 114
......
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