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| Section | Objectives |
|---|---|
| Enterprise Firewall | - Authentication and identity - Routing and advanced networking - High availability - Advanced firewall deployment - Security Fabric integration - Centralized management and analytics - VPN technologies - Troubleshooting |
| SD-WAN | - Application steering - Deployment and troubleshooting - SD-WAN architecture - Overlay VPN - SD-WAN routing - Performance SLA |
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問題 #167
Refer to the exhibit.
A network topology and a partial routing table are shown.
FortiGate has already been configured with a firewall policy that allows all ICMP traffic to flow from port1 to port3.
Which two changes can the administrator perform to ensure the server at 10.4.0.1/24 receives the ICMP echo reply from the laptop at 10.1.0.1/24? (Choose two.)
答案：A,D
解題說明：
The correct answers are A and C .
The study guide describes this exact asymmetric ICMP scenario. It states:
"The server sends an echo request to the PC through port2 of the local router, effectively bypassing FortiGate. When it receives the echo request, the PC responds with an echo reply through its default gateway, 10.1.0.2, which is port1 on FortiGate. Because there is no existing session, the echo reply is dropped. All subsequent echo replies are blocked." That means the current problem exists because:
* the ICMP request bypasses FortiGate
* the ICMP reply goes through FortiGate
* FortiGate has no matching session , so it drops the reply
The study guide then shows the exact corrective option:
"Allowing asymmetric routing:"
config system settings
set asymroute enable
end
It further explains:
"After the packet passes through the FortiGate CPU, FortiGate forwards the packet using the FIB, even though there are no session matches. FortiGate forwards all subsequent echo replies using the FIB." So A is correct.
The other valid fix is to make the traffic symmetric by changing the laptop's default gateway so the reply no longer goes through FortiGate. In the exhibit, the alternate gateway is 10.1.0.254 , which is the local router on the same subnet. If the laptop uses 10.1.0.254 instead of 10.1.0.2, the ICMP echo reply follows the same bypass path as the echo request, so the server receives it without involving FortiGate session validation. This makes C correct.
Why the other options are wrong:
* B is wrong because this is not an RPF problem. The study guide explains RPF as a reverse path lookup used to validate whether a packet arrived on a legitimate interface, mainly for spoofing protection. The issue in this scenario is a missing session due to asymmetric routing , not a strict-versus-feasible RPF failure
* D is wrong because FortiGate already has the specific route 10.4.0.0/24 through port3 in the routing table shown in the exhibit, so adding a default static route to port3 is unnecessary and not the reason the echo reply is being dropped So the verified answers are: A, C .
問題 #168
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?
答案：C
解題說明：
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.
References:
FortiGate 7.6.4 Administration Guide: Certificate Inspection
SSL/SSH Inspection Profile Configuration
問題 #169
Which two statements about Security Fabric communications are true? (Choose two.)
答案：A,B
解題說明：
FortiTelemetry is a critical part of Security Fabric communications and requires explicit configuration for each participating FortiGate interface. The administrative access setting " fabric " (corresponding to FortiTelemetry) must be manually enabled per interface on both upstream and downstream devices. This is performed in the GUI under Administrative Access or via the CLI using the command set allowaccess fabric for the relevant network interface. Without this step, FortiTelemetry communications will not occur on that interface.
Additionally, the default communication between downstream and upstream FortiGate units in the Security Fabric is over TCP port 8013. This port is well-documented as the standard for Security Fabric and FortiTelemetry connections, and must be open and permitted across the network path for connectivity and status enforcement between units. The downstream FortiGate initiates the connection to the upstream via this port unless otherwise configured. This has also been documented as a PCI-relevant port, showing its default usage.
Other options:
Neighbor Discovery in FortiOS uses IPv6 ND protocol, not TCP.
FortiTelemetry port (8013) can be modified, but the interface Administrative Access for the Security Fabric must be manually enabled; Neighbor Discovery port modification is not documented as a supported change for FortiGate.
References:
FortiGate/FortiOS Administration Guide: Enabling FortiTelemetry (fabric) on interfaces Fortinet Technical Tip: FortiTelemetry uses TCP port 8013 by default PCI compliance documentation on port 8013 usage for Security Fabric Fortinet Security Fabric setup procedures and interface options
問題 #170
Refer to the exhibit.
The ADVPN IPsec interface represents the VPN IPsec phase 1 from Hub A to Spoke 1 and Spoke 2, and from Hub B to Spoke 3 and Spoke 4.
You must configure an ADVPN using iBGP and eBGP to connect Overlay 1 with Overlay 2.
Which parameters must you configure in the phase 1 IPsec VPN configuration of the ADVPN tunnels?
答案：C
解題說明：
The Enterprise Firewall 7.6 Administrator Study Guide ' s multiregion ADVPN example uses iBGP inside each region and eBGP between the two regions. On the hubs ' spoke-facing ADVPN phase 1 interfaces, Fortinet configures auto-discovery-sender enable so the hub can initiate ADVPN shortcut negotiation. It also configures network-id to identify the corresponding overlay. Therefore, B matches the documented configuration.
auto-discovery-receiver is associated with the spoke role and does not pair with remote-ip for this hub configuration. The separate hub-to-hub IPsec tunnel uses auto-discovery-forwarder enable to forward ADVPN shortcut information between regions. However, remote-as is a BGP neighbor parameter, not an IPsec phase 1 parameter. Consequently, D combines settings belonging to different configuration contexts.
問題 #171
Refer to the exhibit.
You update the spokes configuration of an existing auto-discovery VPN (ADVPN) topology by adding the parameters shown in the exhibit.
Which is a valid objective of those settings?
答案：A
解題說明：
The configuration enables network-overlay and assigns a different network-id to each overlay. The SD-WAN
7.6 Enterprise Administrator Study Guide explains that these settings distinguish overlays and prevent shortcut establishment across incompatible overlay networks. Consequently, the valid objective is preventing cross-overlay shortcuts.
The additional auto-discovery-shortcuts dependent setting controls shortcut lifetime: a shortcut is brought down when its parent tunnel goes down. It does not convert an existing ADVPN deployment to ADVPN 2.0.
It also does not prevent multiple legitimate shortcuts from using the same overlay. Although network-overlay enable identifies an IPsec tunnel as an overlay, the combination of network-overlay with distinct network-id values specifically provides overlay separation. Therefore, C is the correct answer.
問題 #172
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