NSE7_SSE_AD-25 Exam Dumps - Fortinet Network Security Expert Questions and Answers

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.

When remote users connected to FortiSASE require access to internal resources on Branch-2, the following process occurs:

SD-WAN Capability:

FortiSASE leverages SD-WAN to optimize traffic routing based on performance metrics and priorities.

In the priority settings, HUB-1 is configured with the highest priority (P1), whereas HUB-2 has a lower priority (P2).

Traffic Routing Decision:

FortiSASE evaluates the available hubs (HUB-1 and HUB-2) and selects HUB-1 due to its highest priority setting.

Once the traffic reaches HUB-1, it is then routed to the appropriate branch based on internal routing policies.

Branch-2 Access:

Since HUB-1 has the highest priority, FortiSASE directs the traffic to HUB-1.

HUB-1 then routes the traffic to Branch-2, providing the remote users access to the internal resources.

In FortiSASE Secure Private Access (SPA) deployments, establishing a stable connection between the FortiSASE PoPs and the corporate FortiGate hub relies on two primary layers: the IPsec Tunnel and the BGP Peering .

Exhibit Analysis: The exhibit (image_577e17.jpg) shows the status of several Security PoPs (Singapore, Tokyo, Frankfurt, and San Jose) connected to an " FGT-Hub " .

Tunnel Status vs. BGP Status: For all listed PoPs, the Health Check IP Status and Tunnel status are both shown with a green " Up " icon. This confirms that the underlying IPsec connectivity and the physical path between the SASE cloud and the hub are functioning correctly.

Identifying the Failure: The BGP Peering State is reported as Active . In BGP terminology, the " Active " state specifically indicates that the router is attempting to initiate a TCP connection with its peer but has not yet received a response. A fully functional and successful BGP connection must reach the Established state.

Root Cause Determination: Since the tunnel is up (eliminating Gateway or Authentication Method issues as the primary suspects) but the BGP state remains stuck in " Active, " the most likely cause is a mismatch or misconfiguration in the BGP Peer IP or BGP neighbor settings. This prevents the exchange of routing information necessary for users to access private applications.

To resolve the connectivity problem, the administrator must ensure that the BGP neighbor IPs configured on the FortiGate hub match those assigned by the FortiSASE orchestration and that firewall policies on the hub allow BGP traffic (TCP port 179) across the tunnel.

The correct answers are C and D . FortiSASE branch on-ramp is designed for site-based or branch users by creating IPsec connectivity from a branch location to FortiSASE. The study guide states that branches can use on-premises FortiGate or third-party routers, and that supported devices include FortiGate and third-party VPN-capable devices , so option B is false because support is not limited to FortiExtender and FortiAP. The guide further explains that the branch device is configured as the dial-up client and the branch on-ramp location acts as the server; the branch device uses the on-ramp location FQDN as the remote gateway. It also states that FortiSASE supports only IKEv2 for IPsec dial-up tunnels and that IKEv2 supports the network ID feature for establishing multiple tunnels.

Option D is also correct. Fortinet documentation states directly that BGP configuration is shared between Branch On-ramp and Secure Private Access (SPA) and that SPA network configuration must be configured before deploying a Branch On-ramp location. Option A is false because when deep inspection is enabled, FortiSASE requires the FortiSASE CA certificate to be manually installed on endpoints for Branch On-Ramp/site-based users to avoid certificate errors and allow encrypted traffic inspection.

In the context of Zero Trust Network Access (ZTNA) , security posture tagging is the fundamental mechanism used to enforce compliance and security standards before granting access to protected resources.

Granular Access Control: The primary purpose of tagging is to provide granular access control . 3 Instead of relying solely on static credentials, ZTNA uses these dynamic tags to determine if a device or user meets specific security requirements at the moment of the connection request.

Compliance-Based Enforcement: Tags are assigned based on the compliance status of the endpoint. For example, the FortiSASE Endpoint Management Service (EMS) can verify if a device has an active antivirus, is running a specific OS version, or is joined to the corporate domain. 5 If the device fails any of these checks, the " Compliant " tag is removed, and access is automatically revoked.

Dynamic and Continuous Assessment: Unlike traditional VPNs that check posture only at login, ZTNA posture tagging allows for continuous assessment . If a device ' s security posture changes—for instance, if the user disables their firewall—the tag is updated in real-time across the Security Fabric, and the ZTNA policy will immediately deny further access. 8

Integration with Policies: On the FortiGate (acting as a ZTNA proxy) or within FortiSASE, these tags are used as source criteria in ZTNA policies . 9 Only traffic originating from endpoints with the required tags (e.g., " EMS-Tag: Corporate-Managed " ) is permitted to reach the protected application.

FortiSASE supports zero trust network access (ZTNA) principles by identifying attributes on the endpoint for security posture checks. ZTNA principles require continuous verification of user and device credentials, as well as their security posture, before granting access to network resources.

Security Posture Check:

FortiSASE can evaluate the security posture of endpoints by checking for compliance with security policies, such as antivirus status, patch levels, and configuration settings.

This ensures that only compliant and secure devices are granted access to the network.

Zero Trust Network Access (ZTNA):

ZTNA is based on the principle of " never trust, always verify, " which requires continuous assessment of user and device trustworthiness.

FortiSASE plays a crucial role in implementing ZTNA by performing these security posture checks and enforcing access control policies.