FCSS NST SE 7.6 – Supporting Social & Emotional Well-Being
                     Fortinet
FCSS_NST_SE-7.6
ExamName: Fortinet NSE 6 - Network Security 7.6 Support Engineer
Exam Version: 8.4
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Question 1. (Multi Select)
Exhibit.
Refer to the exhibit, which contains partial output from an IKE real-time debug. Which two statements about
this debug output are correct? (Choose two.)
A: Perfect Forward Secrecy (PFS) is enabled in the configuration.
B: The local gateway IP address is 10.0.0.1.
C: It shows a phase 2 negotiation.
D: The initiator provided remote as its IPsec peer I
Answer: C, D
Explanation:
From the exhibit, you can observe that the debug output captures an IKEv1 negotiation in aggressive
mode. Let's break down the supporting details in line with official Fortinet IPsec VPN troubleshooting
resources and debug guides:
For Option B:
The very first line of the debug output shows:
comes 10.0.0.2:500->10.0.0.1:500, ifindex=7.
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This indicates the traffic direction—from the remote IP (10.0.0.2) with port 500 to the local IP (10.0.0.1) with
port 500. According to Fortinet's documentation, the right side of the arrow always represents the local
FortiGate gateway. Thus, 10.0.0.1 is the local gateway IP address.
For Option D:
You see the statement:
negotiation result "remote"
and
received peer identifier FQDNCE88525E7DE7F00D6C2D3C00000000
Official debug documentation describes that the "peer identifier" or peer ID sent by the initiator is displayed
here. In the context of IKE/IPsec negotiation, this value is used as the IPsec peer ID for authentication and
identification purposes. The initiator is providing "remote" as the peer ID for its connection.
Why Not A or C:
Perfect Forward Secrecy (PFS): The debug does not show any DH group negotiation in phase 2 (no
reference to group2, group5, etc., for phase 2), so you cannot deduce the presence of PFS solely from this
output.
Phase 2 negotiation: The log focuses on IKE (phase 1) negotiation and establishment; there’s no reference
to ESP protocol, Quick Mode, or other identifiers that would show phase 2 SA negotiation and
establishment.
This interpretation aligns with the explanation in the FortiOS 7.6.4 Administration Guide's VPN section and
the official debug command output samples published in Fortinet’s documentation. It demonstrates how to
distinguish between local and remote addresses and how to identify the use of peer IDs.
FortiOS 7.6.4 Administration Guide: IPsec VPN and Debugging VPNs
Technical Support Resources on interpreting IKE debug output and peer ID roles
Question 2. (Single Select)
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?
A: FortiGate uses the SNI from the user's web browser.
B: FortiGate closes the connection because this represents an invalid SSL/TLS configuration.
C: FortiGate uses the first entry listed in the SAN field in the server certificate.
D: FortiGate uses the CN information from the Subject field in the server certificate.
Answer: D
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Explanation:
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, FortiGate does 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.
FortiGate 7.6.4 Administration Guide: Certificate Inspection 
SSL/SSH Inspection Profile Configuration 
Question 3. (Multi Select)
Exhibit 1.
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Exhibit 2.
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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.)
A: Change the priority of the port1 static route to 11.
B: Change the priority of the port2 static route to 5.
C: Configure unset snat-route-change to return it to the default setting.
D: Configure set snat-route-change enable.
Answer: A, D
Explanation:
FortiOS Admin Guide: Static Routing, SNAT Route Change Feature
Question 4. (Multi Select)
Refer to the exhibit, which shows the output of a debug command.
Which two statements about the output are true? (Choose two.)
A: The interlace is part of the OSPF backbone area.
B: There are a total of five OSPF routers attached to the vorz4 network segment
C: One of the neighbors has a router ID of 0.0.0.4.
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D: In the network connected to port4, two OSPF routers are down.
Answer: A, B
Explanation:
FortiOS Admin Guide: OSPF, Debug Outputs
Question 5. (Multi Select)
Refer to the exhibit.
Which three pieces of information does the diagnose sys top command provide? (Choose three.)
A: The miglogd daemon is running on CPU core ID 0.
B: The diagnose sys top command has been running for 18 minutes.
C: The miglogd daemon would be on top of the list, if the administrator pressed m on the keyboard.
D: The cmdbsvr process is occupying 2.4% of the total user memory space.
E: If the neweli daemon continues to be in the R state, it will need to be manually restarted.
Answer: A, C, D
Explanation:
https://community.fortinet.com/t5/FortiGate/Technical-Tip-Using-the-diagnose-sys-top-CLI-command/ta-p/1
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