Fortinet NSE7_FSN_AR-7.6 Dumps Questions Answers

The Enterprise Firewall 7.6 Administrator Study Guide specifically warns that all-zero phase 2 selectors can introduce invalid paths during migrations, particularly when many routes are advertised across VPN tunnels or overlapping networks exist. One recommended mitigation is to use dynamic routing protocols to explicitly control which subnets are permitted and advertised through the tunnel, making A correct.

Fortinet also recommends defining the required encryption domains precisely in the phase 2 selectors. Specifying the exact network segments ensures that only designated traffic is eligible for the IPsec tunnel, making D correct. An IPsec aggregate provides redundancy but does not solve inappropriate route or encryption-domain selection. Assigning IP addresses to tunnel interfaces can support routing designs, but it is not the documented mitigation for invalid paths caused by overly broad all-zero selectors.

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Intermittent behavior (working sometimes, failing others) points to resource or connectivity fluctuations rather than static misconfigurations.

B. Check that FortiGate is not entering conserve mode:

Reason: When FortiGate enters Conserve Mode (due to high memory usage), it changes its inspection behavior to save resources. Depending on the av-failopen setting, it may either bypass inspection (allowing blocked sites) or drop traffic (blocking valid sites) temporarily until memory recovers. This flapping between states causes intermittent filtering issues.

D. Check that the communication between FortiGate and FortiGuard is stable:

Reason: The Web Filter engine relies on real-time queries to the FortiGuard Distribution Network (FDN) to categorize URLs that are not in the local cache. If the internet connection or the specific path to FortiGuard is unstable (packet loss, latency), queries will time out. This results in " Rating Errors, " which can block or allow traffic unpredictably based on the " Allow websites when a rating error occurs " setting.

Why other options are incorrect:

A: A mismatch in inspection mode (e.g., Profile set to Proxy, Policy set to Flow) is a static configuration error. It would typically result in the profile not being selectable or consistently failing/not applying, rather than working intermittently.

C: If the wrong port is mapped (e.g., HTTP on 8080 is not mapped), the inspection engine will consistently ignore traffic on that port. It would not be intermittent.

The correct answers are A and D.

The debug output shows:

Sent RADIUS req to server ' RadiusServer ' : IP=172.25.188.164 ... user= " student " using CHAP

Result for radius svr ' RadiusServer ' 172.25.188.164(0) is 0

Sending result 0 for req 2

The study guide explains that in RADIUS real-time debug, FortiGate shows the IP address of the RADIUS server it is querying. In the example, it says FortiGate “creates an access request to the RADIUS server at IP address 10.0.13.130” and shows the line Sent radius req to server ... IP=10.0.13.130

So in your exhibit, the queried server is clearly 172.25.188.164, which makes A correct.

The study guide also states:

“The message fnbamd_comm_send_result-Sending result 0 indicates that the authentication was successful and that FortiGate received the Access-Accept message.”

Since your exhibit also ends with Sending result 0, that makes D correct.

Why the other options are wrong:

B is wrong because result 0 means authentication successful, not failed

C is wrong because the debug explicitly shows using CHAP, and the study guide lists supported RADIUS schemes as CHAP, PAP, MS-CHAP, and MS-CHAPv2

E is wrong because the study guide says two-factor authentication would involve an Access-Challenge response: “If two-factor authentication is enabled on the server, the response is an Access-Challenge message”Your exhibit shows successful result 0 / Access-Accept, not a challenge.

So the verified answers are: A, D.