NSE7_NST-7.2 Fortinet NSE 7 - Network Security 7.2 Support Engineer Free Practice Exam Questions (2025 Updated)

Remote Gateway IP:

The output shows10.200.5.1as the remote gateway IP, confirming that this is the IP address of the remote gateway involved in the IPsec VPN tunnel.

Quick Mode Selectors:

The quick mode selectors specify the subnets involved in the VPN. The output showssrc: 0:10.1.2.0/255.255.255.0:0anddst: 0:10.1.1.0/255.255.255.0:0, indicating the subnets being tunneled.

DPD (Dead Peer Detection):

DPD is shown asmode=on-demand on=1 idle=20000ms retry=3 count=0 seqno=0, indicating that DPD is enabled in on-demand mode.

Anti-replay:

The output includesreplaywin=2048andreplaywin_lastseq=00000000, which are indicators that anti-replay protection is enabled for the IPsec tunnel.

References

Fortinet Network Security 7.2 Support Engineer Documentation

VPN Configuration and Diagnostic Guides

RTT (Round Trip Time):

RTT in the context of the FortiGuard server list indicates the time it takes for a request to be sent to a FortiGuard server and for a response to be received.

This metric helps determine the latency between the FortiGate device and the FortiGuard servers, which is crucial for ensuring efficient and quick updates and responses for services like web filtering and antivirus updates.

Server Selection:

The FortiGate device uses RTT values to prioritize servers. Servers with lower RTT values are preferred as they respond faster, ensuring minimal delay in processing requests.

This improves the overall performance of FortiGuard services by reducing the time it takes to communicate with the servers.

References:

Fortinet Community: Troubleshooting FortiGuard server connections and RTT values​(Welcome to the Fortinet Community!)​​(Fortinet Docs)​.

Fortinet Documentation: FortiGuard server settings and RTT explanation​(Welcome to the Fortinet Community!)​​(Fortinet Docs)​.

Current Configuration Analysis:

The firewall policy currently allows ICMP traffic from port1 to port3, enabling the ICMP echo request to reach the server.

However, for the server to send an ICMP echo reply back to the laptop, the traffic must be allowed from port3 to port1.

Required Configuration:

To ensure the server at10.4.0.1/24can send the ICMP echo reply back to the laptop at10.1.0.1/24, the administrator needs to configure a new firewall policy.

The policy must explicitly allow ICMP traffic from port3 to port1.

Steps to Configure:

Access the FortiGate configuration interface.

Navigate to the Firewall Policy section.

Create a new policy allowing ICMP traffic from port3 to port1.

Save and apply the new policy to ensure bidirectional ICMP traffic is permitted.

References

Fortinet Network Security 7.2 Support Engineer Documentation

FortiGate Firewall Policy Configuration Guides

IKE_SA_INIT:

This is the first exchange in IKEv2. It establishes a secure, authenticated channel between peers and negotiates cryptographic algorithms and keys.

IKE_Auth:

The second exchange authenticates the IKE SA (Security Association) using the previously negotiated keys and algorithms. This exchange also establishes the first IPsec SA.

Create_CHILD_SA:

This exchange creates additional IPsec SAs after the initial authentication. It can also be used to rekey existing IPsec SAs to maintain security.

Informational:

This is a generic exchange used for various purposes such as error notification, deletion of SAs, and other control messages.

References:

Fortinet Community: IKEv2 packet exchanges and troubleshooting

Fortinet Documentation: IPsec VPN Concepts

Logon Event on Collector Agent:The debug output indicates that the logon event is recorded, showing that the collector agent on Windows is logging user activities and transmitting this data to the FortiGate.

DC Agent Mode:The presence of detailed logon events and their corresponding metadata, such as the domain and workstation information, suggests that the FortiGate is using DC agent mode. This mode involves an agent installed on the Domain Controller (DC) to capture and forward logon events.

References:

Fortinet Community: How FSSO Works and Troubleshooting Steps​(Welcome to the Fortinet Community!)​​(Fortinet GURU)​.

RADIUS Server IP Address:

The debug output shows that the RADIUS request was sent to the server atIP=172.25.188.164. This indicates that the RADIUS server being queried for authentication is indeed located at this IP address.

Authentication Result:

The debug output includes a line indicating the result for the RADIUS server:Result for radius svr 'RadiusServer' 172.25.188.164(0) is 0. A result code of0typically signifies that the authentication attempt was unsuccessful.

Authentication Scheme:

The debug output does not indicate that the authentication scheme used was pop3; it mentions using CHAP (Challenge Handshake Authentication Protocol).

Two-factor Authentication:

There is no indication in the debug output that two-factor authentication was required for this session.

References

Fortinet Network Security 7.2 Support Engineer Documentation

RADIUS Authentication Configuration and Debugging Guides

The commanddiagnose test application ipsmonitor 5is used to restart all IPS (Intrusion Prevention System) engines and monitors on the FortiGate device. This command is part of the diagnostic tools available for troubleshooting and maintaining the IPS functionality on the FortiGate.

Running this command forces the IPS system to reset and reinitialize, which can be useful in situations where the IPS functionality appears to be malfunctioning or not responding correctly.

This action helps in clearing any issues that might have arisen due to internal errors or misconfigurations, ensuring that the IPS engines operate correctly after the restart.

Refused Connection:A refused connection typically indicates a mismatch in the TCP port configuration between the FortiGate and the collector agent. Ensuring both are configured to use the same TCP port is crucial for proper connectivity.

Mismatched Pre-Shared Password:If the pre-shared password configured on the FortiGate does not match the one set on the collector agent, authentication will fail, leading to connectivity issues.

Inability to Reach IP Address:This can occur due to network issues such as incorrect routing, firewall rules blocking traffic, or the collector agent being down. Verifying network connectivity and the status of the collector agent is necessary to resolve this issue.

References:

Fortinet Community: Troubleshooting FSSO Connectivity Issues​(Welcome to the Fortinet Community!)​​(Welcome to the Fortinet Community!)​​(Welcome to the Fortinet Community!)​.

Automation Stitches Overview:

Automation stitches in FortiOS allow administrators to automate responses to specific events, such as running diagnostic commands or taking corrective actions when certain thresholds are exceeded.

Diagnostic Commands and Alerts:

Automation stitches can be configured to run diagnostic commands and attach the results to email alerts. This is useful for monitoring and troubleshooting purposes, particularly when CPU or memory usage exceeds set thresholds.

Sequential Execution with Parameters:

When actions are executed sequentially, each action can take parameters from the previous action as input. This enables more complex workflowsand automation sequences where the output of one action influences the next.

References:

Fortinet Documentation: Configuring and using automation stitches​(Welcome to the Fortinet Community!)​​(Hammertux)​.

Fortinet Community: Automation stitches and their applications in FortiOS​(Hammertux)​​(Fortinet GURU)​.

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 is10.200.3.2as indicated in the exhibit.

Sniffer Command:

The correct command to capture ESP traffic for the VPN namedDialUp_0is:

diagnose sniffer packet any ‘espandhost10.200.3.2’

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

References:

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)​.

BGP Advertisement:The output from the commandget router info bgp neighbors 100.64.2.254 advertised-routesshows the routes that the local router is advertising to its BGP neighbor.

Output Analysis:

TheNetworkcolumn lists the networks being advertised.

TheNext Hopcolumn indicates the next-hop IP address for these routes.

The line*> 10.20.30.40/24 100.64.2.1indicates that the 10.20.30.40/24 network is being advertised with a next-hop of 100.64.2.1.

Local Router's Role:Since the output lists the advertised routes, it means that the local router (with router ID 172.16.1.254) is advertising the 10.20.30.40/24 network to its neighbor 100.64.2.254.

This confirms that the local router is indeed advertising the specified network to its BGP neighbor.

References:

Fortinet Documentation: Understanding BGP Route Advertisements​(Fortinet Document Library)​​(Fortinet Docs)​.