Pass the Fortinet Fortinet Network Security Expert NSE7_SSE_AD-25 Questions and answers with CertsForce

The VPN tunnel between the FortiSASE spoke and the FortiGate hub is not establishing due to the configuration of mode config, which is not supported by FortiSASE spoke devices. Mode config is used to assign IP addresses to VPN clients dynamically, but this feature is not applicable to FortiSASE spokes.

Mode Config in IPsec:

The configuration snippet shows that mode config is enabled in the IPsec phase 1 settings.

Mode config is typically used for VPN clients to dynamically receive an IP address from the VPN server, but it is not suitable for site-to-site VPN configurations involving FortiSASE spokes.

Configuration Adjustment:

To establish the VPN tunnel, you need to disable mode config in the IPsec phase 1 settings.

This adjustment will allow the FortiSASE spoke to properly establish the VPN tunnel with the FortiGate hub.

Steps to Disable Mode Config:

Access the VPN configuration on the FortiSASE spoke.

Edit the IPsec phase 1 settings to disable mode config.

Ensure other settings such as pre-shared key, remote gateway, and BGP configurations are correct and consistent with the FortiGate hub.

Zero-trust tags are critical in implementing zero-trust network access (ZTNA) policies. Here are the two key advantages of using zero-trust tags:

Access Control (Allow or Deny):

Zero-trust tags can be used to define policies that either allow or deny access to specific network resources based on the tag associated with the user or device.

This granular control ensures that only authorized users or devices with the appropriate tags can access sensitive resources, thereby enhancing security.

Determining Security Posture:

Zero-trust tags can be utilized to assess and determine the security posture of an endpoint.

Based on the assigned tags, FortiSASE can evaluate the device's compliance with security policies, such as antivirus status, patch levels, and configuration settings.

Devices that do not meet the required security posture can be restricted from accessing the network or given limited access.

The exhibit (image_6361c9.jpg) displays a standard SASE onboarding email sent from the FortiSASE platform to an end user to facilitate the enrollment of their device.

Communication Source (D): This email is generated by the FortiSASE administrator through the Onboard Users menu in the FortiSASE portal. It provides the user with direct download links for the FortiClient application and a unique Invitation Code required for telemetry connection.

Installer Types and Automation (B): FortiSASE provides two primary methods for deploying the client agent:

Pre-configured Installer: This version is pre-packaged with the organization's unique invitation code built-in. When a user runs this installer, the invitation code step is skipped as the client automatically registers to the correct FortiSASE instance upon installation.

Manual Installer: This version requires the user to manually copy and paste the invitation code from the onboarding email into the FortiClient "Zero Trust Telemetry" menu to complete enrollment.

Analysis of Incorrect Options:

Option A: FortiSASE utilizes a unified agent (FortiClient). The components (VPN, ZTNA, Web Filter, etc.) are managed via Endpoint Profiles assigned in the SASE portal and pushed to the client automatically; they are not manually selected by the user during installation.

Option C: As noted above, if the administrator provides a pre-configured installer, the manual entry of the code is not required, making the statement that it must "always" be entered manually false.

To resolve internal hostnames using internal DNS servers for remotely connected endpoints, the following two components must be configured on FortiSASE:

Split DNS Rules:

Split DNS allows the configuration of specific DNS queries to be directed to internal DNS servers instead of public DNS servers.

This ensures that internal hostnames are resolved using the organization's internal DNS infrastructure, maintaining privacy and accuracy for internal network resources.

Split Tunneling Destinations:

Split tunneling allows specific traffic (such as DNS queries for internal domains) to be routed through the VPN tunnel while other traffic is sent directly to the internet.

By configuring split tunneling destinations, you can ensure that DNS queries for internal hostnames are directed through the VPN to the internal DNS servers.

FortiSASE Secure Private Access (SPA) is designed to provide remote users with seamless and secure access to private applications hosted behind an organization's FortiGate Next-Generation Firewall (NGFW) or SD-WAN hubs.2

Hub-and-Spoke Architecture: In this deployment model, the organization’s FortiGate (either a standalone NGFW or an SD-WAN hub) acts as the hub, while the global FortiSASE Security Points of Presence (PoPs) act as spokes.3

IPsec and BGP Integration: The connectivity between the FortiSASE PoPs and the corporate hub is established via IPsec VPN tunnels. To manage routing and ensure that remote users can reach the correct internal subnets, Border Gateway Protocol (BGP) is used for dynamic route exchange.4 This allows the hub to advertise internal prefixes to FortiSASE, enabling the PoPs to route user traffic effectively without requiring complex static route management.

Simplified Configuration: To reduce administrative overhead and prevent manual configuration errors on the FortiOS side, Fortinet introduced the SPA easy configuration key (also known as an invitation code or simplified SPA setup). An administrator generates this key in the FortiSASE portal and enters it on the FortiGate hub. This triggers the Fabric Overlay Orchestrator to automatically provision the necessary IPsec tunnels, BGP peerings, and firewall policies required for SPA connectivity.

According to the FortiSASE 25 Architecture Guide, this method is preferred over legacy VPNs because it supports both TCP and UDP traffic, integrates natively with existing SD-WAN deployments, and automatically finds the shortest path to applications using ADVPN (Auto-Discovery VPN) shortcuts where applicable.

Based on the settings shown in the provided exhibits, the vulnerability remediation workflow is determined by the Endpoint Profile and the Vulnerability Dashboard.

Endpoint Profile Evaluation: The top exhibit displays the Scan for Vulnerabilities settings. The toggle for Automatically patch vulnerabilities is explicitly set to Disabled. Consequently, the system will not perform automated remediation when a scan completes.

Manual Patching Requirement: The Vulnerability Dashboard (bottom exhibit) lists several application vulnerabilities with a Patching status of Manual patching required. In a FortiSASE environment, "Manual" indicates that the vulnerability cannot be handled by the client's autonomous update process and requires a direct instruction from the management plane.

Administrative Intervention: The dashboard includes a Patch endpoints action button. Since auto-patching is disabled in the profile, an administrator must manually select the vulnerabilities and click the "Patch endpoints" button to remotely trigger the patching sequence on the managed endpoints via the FortiSASE cloud service.

Workflow Logic: While FortiClient acts as the "conductor" on the local machine to facilitate the download and installation, the trigger for this specific scenario is the administrator's remote action within the portal. This differentiates it from Option D (which is disabled) and Option C (which would involve a user manually browsing a website outside the managed SASE workflow).

In FortiSASE, the accuracy of application usage reports depends on two primary factors: the ability to identify the application (visibility) and the configuration to log that data (reporting).

Deep Inspection Requirement (D): Modern applications frequently use encryption (SSL/TLS) and dynamic ports. Without Deep Inspection (SSL decryption), the FortiSASE security engine cannot see the application payload and is limited to inspecting headers or SNI. This results in many applications being identified only by their generic protocol (e.g., "SSL" or "HTTPS") and subsequently appearing as Unknown in reports because the specific Layer 7 application signature cannot be matched.

Application Control Monitor Setting (B): Even when an application is correctly identified, it must be properly logged to appear accurately in the "Daily report for application usage". In the inline-CASB (Application Control) profile, categories are assigned actions such as "Allow", "Block", or "Monitor". If categories are set to "Allow" instead of Monitor, the traffic is permitted but granular session details—including the specific application category—may not be logged for reporting purposes, causing them to be grouped into an "Unknown" or "Uncategorized" bucket in high-level summaries.

Analysis of Incorrect Options:

Option A: While certificate inspection provides more visibility than no inspection, it is still insufficient for many applications that require deep packet inspection for identification. Therefore, the lack of Deep inspection (Option D) is the more accurate technical explanation for "Unknown" results.

Option C: ZTNA tags are used for access control and posture-based policy enforcement; they do not impact the application identification engine's ability to categorize traffic flows.

In the user connection monitor, the random characters shown for the username indicate that log anonymization is enabled. Log anonymization is a feature that hides the actual user information in the logs for privacy and security reasons. To display proper user information, you need to disable log anonymization.

Log Anonymization:

When log anonymization is turned on, the actual usernames are replaced with random characters to protect user privacy.

This feature can be beneficial in certain environments but can cause issues when detailed user monitoring is required.

Disabling Log Anonymization:

Navigate to the FortiSASE settings.

Locate the log settings section.

Disable the log anonymization feature to ensure that actual usernames are displayed in the logs and user connection monitors.

According to the NSE7 SASE Enterprise Guide (Pages 46 & 61), deploying Secure Private Access (SPA) with SD-WAN provides advanced security and networking capabilities by routing traffic through global Points of Presence (PoPs).

Inline Security Inspection (D): A major advantage of this approach is that traffic is routed through FortiSASE PoPs before it reaches private applications. This enables inline security inspection, providing robust protection against threats by applying the full SASE security stack—including antivirus, intrusion prevention, and deep packet inspection—to private access traffic.

Support for TCP and UDP (B): Organizations with existing FortiGate SD-WAN deployments benefit from broader and seamless access to privately hosted applications. The SD-WAN SPA use case explicitly supports both TCP- and UDP-based applications, ensuring that legacy or specialized services that rely on UDP function correctly over the secure tunnel.

SD-WAN Optimization: This method leverages the benefits of SD-WAN to optimize traffic flow between the SASE PoP and the corporate SD-WAN hub or data center FortiGate. It is particularly useful for mission-critical applications that require an extra layer of security combined with path optimization.

Architecture: In this configuration, the FortiSASE Security PoPs act as spokes in the organization’s SD-WAN network, relying on IPsec VPN overlays and BGP for secure dynamic routing.

While ZTNA posture checks are a feature of the broader ecosystem, the NSE7 Guide specifically highlights inline inspection and application support (TCP/UDP) as primary advantages of the SD-WAN integrated SPA approach.

In a FortiSASE environment, the ability of a remote user to establish a VPN tunnel is governed not only by their credentials and firewall policies but also by geographic access controls.

Geofencing Mechanism: FortiSASE includes a Geofencing feature (found under Configuration > Restrictions or Configuration > Geofencing in newer versions) that allows administrators to restrict or allow access to SASE services based on the geographic location of the endpoint's public IP address.

Connection Failure vs. SSO Success: The scenario describes a situation where users can successfully authenticate via SSO to reach third-party SaaS apps like Office 365 (O365) or Salesforce (SFDC) but cannot connect to the SASE VPN. This occurs because the SSO authentication is handled directly by the Identity Provider (IdP) (e.g., Microsoft Entra ID), which may not have the same geographic restrictions. However, when the FortiClient attempts to establish the tunnel to the FortiSASE Point of Presence (PoP), the SASE gateway checks the Geofencing list. If the country the user is visiting is on the Deny list (or not on the Allow list), the connection is dropped at the "local-in" policy level on the SASE backend, preventing the tunnel from forming.

Verification and Resolution: To resolve this, the administrator must verify the Geofencing settings and ensure that the countries where the traveling users are located are permitted to connect. If the feature is enabled with a "Deny" list, the specific country must be removed from that list; if it uses an "Allow" list, the country must be added.

Analysis of Other Options:

Option A: Firewall policies govern traffic after the tunnel is established; they cannot resolve a failure to connect the tunnel itself.

Option B: Restarting the device is a general troubleshooting step but will not bypass a server-side geographic block.

Option D: While keeping clients updated is a best practice, the issue described (specific to overseas travel while other functions work) points to a configuration restriction rather than a software bug.