Free FCSS_NST_SE-7.6: FCSS - Network Security 7.6 Support Engineer Exam Questions and Answers
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Last updated: September 19, 2026
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Question #1
What are two reasons you might see iprope_in_check() check failed, drop when using the debug flow? (Choose two.)
Select 2 answers.
Please select an optionIncorrectCorrect answer: C, D
iprope_in_check() handles local-in and DNAT related checks, so the drop typically points to traffic denied by the trusted host configuration for administrative access, or to a VIP or IP pool that does not match the destination.
Was this answer correct?Question #2
Refer to the exhibits. An administrator Is expecting to receive advertised route 8.8.8.8/32 from FGT-A. On FGT-B, they confirm that the route is being advertised and received, however, the route is not being injected into the routing table. What is the most likely cause of this issue?
Please select an optionIncorrectCorrect answer: D
Was this answer correct?Question #3
Exhibit 1. Exhibit 2. Refer to the exhibits, which show the configuration on FortiGate and partial internet session information from a user on the internal network. An administrator would like to lest session failover between the two service provider connections. Which two changes must the administrator make to force this existing session to immediately start using the other interface? (Choose two.)
Select 2 answers.
Please select an optionIncorrectCorrect answer: A, D
Was this answer correct?Question #4
Consider the scenario where the server name indication (SNI) does not match either the common name (CN) or any of the subject alternative names (SAN) in the server certificate. Which action will FortiGate take when using the default settings for SSL certificate inspection?
Please select an optionIncorrectCorrect answer: D
When FortiGate performs SSL certificate inspection with default settings, it checks if the Server Name Indication (SNI) matches either the Common Name (CN) or any Subject Alternative Name (SAN) in the server certificate. If there is no match, FortiGatedoes not block the connection; instead, it uses the CN value from the certificate's subject field to continue web filtering and categorization. This behavior is described in the official Fortinet 7.6.4 Administration Guide: "Check the SNI in the hello message with the CN or SAN field in the returned server certificate: Enable: If it is mismatched, use the CN in the server certificate." This is the default (Enable) mode, which differs from the Strict mode that would block the mismatched connection. By default, this policy ensures service continuity and prevents disruptions due to certificate mismatches, allowing FortiGate to log and inspect based on the CN even when the requested SNI does not match. It provides a balance between connection reliability and the accuracy of filtering by certificate identity, allowing security policies to remain functional without unnecessary blocks. This approach is recommended by Fortinet to maintain usability for end-users while still supporting granular inspection. [References:, FortiGate 7.6.4 Administration Guide: Certificate Inspection?, SSL/SSH Inspection Profile Configuration, ]
Was this answer correct?Question #5
Which three common FortiGate-to-collector-agent connectivity issues can you identify using the FSSO real-time debug? (Choose three.)
Select 3 answers.
Please select an optionIncorrectCorrect answer: B, C, D
The FSSO real-time debug shows the FortiGate side of the connection, so it reveals an unreachable collector agent IP, refused connections from a TCP port mismatch, and a mismatched pre-shared password. A full log or a software version issue is not visible there.
Was this answer correct?Question #6
The local OSPF router is unable to establish adjacency with a peer. Which two things should the administrator do to troubleshoot the issue? (Choose two.)
Select 2 answers.
Please select an optionIncorrectCorrect answer: C, D
OSPF neighbors must be on the same subnet to exchange hellos, and those hellos ride directly on IP protocol 89, so a filter blocking protocol 89 stops adjacency. TCP 179 belongs to BGP.
Was this answer correct?Question #7
Which statement about protocol options is true?
Please select an optionIncorrectCorrect answer: D
Protocol options tell the proxy which Layer 4 ports to associate with each upper-layer protocol such as HTTP, SMTP or FTP, so traffic on non-standard ports is still inspected as the right protocol.
Was this answer correct?Question #8
Which two statements about conserve mode are true? (Choose two.)
Select 2 answers.
Please select an optionIncorrectCorrect answer: B, C
FortiGate enters conserve mode at the red threshold and begins applying the configured action to new sessions needing content inspection, and it leaves conserve mode only after memory falls below the green threshold; the extreme threshold is what triggers dropping all new sessions.
Was this answer correct?Question #9
Refer to the exhibit, which shows one way communication of the downstream FortiGate with the upstream FortiGate within a Security Fabric. What three actions must you take to ensure successful communication? (Choose three.)
Select 3 answers.
Please select an optionIncorrectCorrect answer: A, C, D
One way communication means the downstream device is not authorized on the root FortiGate, Security Fabric/FortiTelemetry is not enabled on the upstream receiving interface, or TCP port 8013 is blocked in between.
Was this answer correct?Question #10
Which exchange lakes care of DoS protection in IKEv2?
Please select an optionIncorrectCorrect answer: D
TheIKE_SA_INITexchange in IKEv2 is responsible for DoS protection measures. During IKE_SA_INIT, before authentication and further exchange, the responder can use cookie challenges (per RFC 7296 and Fortinet VPN documentation). If a DoS attack is suspected (many requests from the same source), the responder replies with a cookie. Only after the initiator returns the correct cookie does the exchange proceed, protecting the responder from state exhaustion and certain forms of DoS traffic at the handshake stage. FortiOS VPN Manual: IKEv2 Exchange Process and DoS Protections IKEv2 RFC 7296: Description of IKE_SA_INIT and DoS Cookie Mechanism
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