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Master Fortinet NSE 7 - Network Security 7.2 Support Engineer: Ace Your NSE7_NST-7.2 Journey

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Question 1

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?


Correct : A

SNI and Certificate Mismatch: When 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, FortiGate's default behavior is to consider this as an invalid SSL/TLS configuration.

Default Action: FortiGate, under default settings for SSL certificate inspection, will close the connection to prevent potential security risks associated with mismatched certificates.


Fortinet Community: SSL Certificate Inspection Configuration and Behavior (Welcome to the Fortinet Community!).

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Question 2

Exhibit.

Refer to the exhibit, which contains the partial output of the get vpn ipsec tunnel details command. Based on the output, which two statements are correct? (Choose two.)


Correct : A, C

Anti-replay Enabled:

The exhibit shows replay: enabled, which confirms that anti-replay is enabled for this IPsec tunnel. Anti-replay is a security feature that prevents replay attacks by ensuring that packets are not duplicated or reused.

NPU Acceleration:

The NPU acceleration: encryption (outbound) decryption (inbound) line indicates that Network Processing Unit (NPU) acceleration is used.

The npu_flag for this tunnel is 02. This indicates that encryption and decryption are handled by the NPU, improving the performance of the VPN tunnel.


Fortinet Community: Troubleshooting IPsec VPN Tunnels (Welcome to the Fortinet Community!) (Welcome to the Fortinet Community!).

Fortinet Documentation: Verifying IPsec VPN Tunnels (Fortinet Docs) (Fortinet Docs).

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Question 3

Exhibit.

Refer to the exhibit, which contains partial output from an IKE real-time debug.

The administrator does not have access to the remote gateway.

Based on the debug output, which configuration change can the administrator make to the local gateway to resolve the phase 1 negotiation error?


Correct : B

Analyzing Debug Output:

The debug output shows multiple proposals with encryption algorithms like AES CBC and hashing algorithms like SHA256.

The negotiation failure (no SA proposal chosen) suggests that there is a mismatch in the encryption or hashing algorithms between the local and remote gateways.

Configuration Change:

To resolve the phase 1 negotiation error, the local gateway needs to include a compatible proposal.

Adding AES256-SHA256 to the phase 1 proposal configuration ensures that both gateways have a matching set of encryption and hashing algorithms.


Fortinet Documentation: Configuring IPsec Tunnels (Fortinet Docs) (Welcome to the Fortinet Community!).

Fortinet Community: Troubleshooting IKE Negotiation Failures (Welcome to the Fortinet Community!) (Welcome to the Fortinet Community!).

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Question 4

Which two statements about application-layer test commands ate true? (Choose two.)


Correct : A, B

Statistics and Configuration Information:

Application-layer test commands can display detailed statistics and configuration information about specific features or processes. For example, commands like diagnose vpn ipsec tunnel list provide detailed statistics about VPN tunnels.

Real-time Debugs:

These commands also facilitate real-time debugging of applications and processes. For instance, using diagnose debug application followed by the specific application, such as fssod, provides real-time debug information which is crucial for troubleshooting.


Fortinet Community: Useful FSSO Commands and Troubleshooting (Welcome to the Fortinet Community!) (Welcome to the Fortinet Community!).

Fortinet Documentation: Application-layer Test Commands (Fortinet GURU).

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Question 5

Refer to the exhibit. which contains the output of diagnose vpn tunnel list.

Which command will capture ESP traffic for the VPN named DialUp_0?


Correct : C

Capturing ESP Traffic:

ESP (Encapsulating Security Payload) traffic is associated with IPsec and is identified by the protocol number 50. To capture ESP traffic, you need to filter packets based on this protocol.

In this specific case, you also need to filter for the host associated with the VPN tunnel, which is 10.200.3.2 as indicated in the exhibit.

Sniffer Command:

The correct command to capture ESP traffic for the VPN named DialUp_0 is:

diagnose sniffer packet any 'esp and host 10.200.3.2'

This command ensures that only ESP packets to and from the specified host are captured, providing a focused and relevant data set for troubleshooting.


Fortinet Documentation: Verifying IPsec VPN Tunnels (Fortinet Docs) (Welcome to the Fortinet Community!).

Fortinet Community: Troubleshooting IPsec VPN Tunnels (Welcome to the Fortinet Community!) (Fortinet Docs).

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