Free Fortinet NSE4_FGT_AD-7.6 Practice Exam with Questions & Answers

When the Application sensor receives traffic on that port, the protocol decoder will try to determine if the received data matches the HTTPS traffic In this case it will not match because it is P2P traffic, so this will class as violation and blocked The protocol decoder also try to determine what type of traffic it is, and even if it could not figure out it is P2P traffic, it still count as a violation because even though it does not know what it is, it knows for fact it is not HTTPS

From the exhibits:

A VIP named VIP-WEB-SERVER is configured on WAN (port2) with:

External IP: 100.65.0.200

Mapped (internal) IP: 10.0.11.50

Port forwarding enabled (TCP)

External service port: 443

Map to IPv4 port: 4443

The inbound firewall policy Web_Server_Access is:

From WAN (port2) to LAN (port4)

Destination: VIP-WEB-SERVER

Service: HTTPS

NAT: Disabled (meaning no source NAT is applied)

What happens to the packet

A host 100.65.1.111 sends TCP SYN dst-port 443 to 100.65.0.200.

When FortiGate matches the VIP and forwards traffic to the internal server, FortiGate performs destination NAT (DNAT) based on the VIP:

Source IP is unchanged because policy NAT is disabled:

Source remains 100.65.1.111

Destination IP is translated by the VIP:

Destination becomes 10.0.11.50

Destination port is translated by the VIP port-forward:

Destination port becomes 4443

Therefore, at the time FortiGate forwards the packet to the destination (internal server), it will be:

Source address: 100.65.1.111

Destination address: 10.0.11.50

Destination port: 4443

Based on the FortiOS 7.6 Authentication and User Group documentation, the correct answer is A.

Meaning of “Include in every user group” (FortiOS 7.6)

When configuring a RADIUS server on FortiGate, enabling Include in every user group has a very specific and documented effect:

The configured RADIUS server object is automatically added to all FortiGate user groups.

As a result, any user who successfully authenticates against that RADIUS server becomes a valid member of every FortiGate user group, unless additional group filtering (such as RADIUS attributes) is applied.

This simplifies configuration when the same external authentication source must be accepted across multiple firewall policies that reference different user groups.

This behavior is explicitly described in the FortiOS 7.6 Administrator Guide under RADIUS authentication servers and user groups.

Why Option A is Correct

FortiGate user groups can include:

Local users

LDAP servers

RADIUS servers

Enabling Include in every user group causes FortiGate to:

Insert the RADIUS server into all existing and future FortiGate user groups

Therefore, all users authenticating via this RADIUS server are implicitly allowed in every FortiGate user group.

This is exactly what option A describes.

Why the Other Options Are Incorrect

B: FortiGate does not push users or groups into the RADIUS server. Authentication is always initiated by FortiGate toward RADIUS.

C: FortiGate does not manage or modify RADIUS-side group definitions.

D: LDAP and RADIUS user groups are separate authentication mechanisms; this setting does not merge or affect LDAP groups.

In FortiOS 7.6, when FortiGate is integrated with FortiAnalyzer and FortiManager, firewall policies rely on a Universally Unique Identifier (UUID) to ensure proper policy tracking, synchronization, and log correlation across devices.

Why the UUID is required

Every firewall policy in FortiOS has a UUID.

FortiManager uses the UUID to:

Track policies across managed FortiGate devices

Maintain policy consistency during installs and revisions

FortiAnalyzer uses the UUID to:

Correlate logs accurately to the correct firewall policy

Preserve log association even if policy order or policy ID changes

Without a UUID:

Policy-to-log mapping can break

FortiManager cannot reliably manage or synchronize policies

FortiAnalyzer log analysis becomes inconsistent

This is explicitly documented in Fortinet administration and logging architecture references.

Why the other options are incorrect

B. Policy IDPolicy ID can change when policies are moved and is not reliable for long-term correlation across FortiManager and FortiAnalyzer.

C. Sequence IDSequence ID reflects GUI ordering only and has no role in log correlation.

D. Log IDLog ID is generated per log event, not per firewall policy.

“With this method, you must create a user group and add the preconfigured remote server to the group. This setup allows you to select one or more pre-existing groups from the Radius server, enabling any user within those groups to be authenticated.”

“The response from the server reports success, failure, and group membership details.”

“Note that Fortinet has a vendor-specific attributes (VSA) dictionary to identify the Fortinet-proprietary RADIUS attributes. This capability allows you to extend the basic functionality of RADIUS.”

Technical Deep Dive:

The attribute shown in the exhibit is Fortinet-Group-Name = Training. This is a Fortinet RADIUS Vendor-Specific Attribute (VSA) used to return group membership information to FortiGate. FortiGate uses that returned value to match the authenticated user to the corresponding FortiGate user group, in this case Training.

That is why A is correct: the administrator needs this so FortiGate can authenticate users and place or match them into the Training group for identity-based policy control.

Why the others are wrong:

* B is wrong because the RADIUS secret is configured separately as the shared secret between FortiGate and the RADIUS server, not as a Fortinet-Group-Name attribute.

* C is wrong because OU matching is an LDAP concept, not standard RADIUS group matching.

* D is wrong because this attribute is not for “any” group; it is explicitly returning the specific group name Training.

In practice, this lets FortiGate apply firewall policies such as:

```bash

config user group

edit " Training "

set member " RADIUS_Server "

next

end

```

Then the RADIUS server returns Fortinet-Group-Name=Training, and FortiGate matches the user into that group for policy enforcement.

Phase 1 being up confirms the two FortiGate devices can authenticate and build the IKE SA. Phase 2 failing indicates the IPsec (Quick Mode) SA negotiation is failing due to mismatched Phase 2 parameters.

From the exhibit, the Phase 2 mismatches that would prevent SA establishment are:

1) Phase 2 selectors must mirror each other (Proxy IDs)

HQ-NGFW Phase 2 selector shows:

Local: 10.0.11.0/24

Remote: 172.20.1.0/24

BR1-FGT Phase 2 selector shows:

Local: 172.20.1.0/24

Remote: 10.11.0.0/24 ⟵ does not match HQ’s local subnet (10.0.11.0/24)

In FortiOS, Phase 2 comes up only when the peers’ selectors (proxy IDs) match as opposite pairs (local on one side = remote on the other).

✅ Fix: A. On BR1-FGT, set Remote Address to 10.0.11.0/255.255.255.0.

2) Phase 2 proposal must match (encryption/authentication)

HQ-NGFW shows encryption AES128 (with SHA1)

BR1-FGT shows encryption AES256 (with SHA1)

For Phase 2 to establish, both peers must have at least one common proposal (same encryption and authentication settings). With one side set to AES128 and the other to AES256, there is no match.

✅ Fix: D. On HQ-NGFW, set Encryption to AES256.

Why the other options are not correct

B. Enable Diffie-Hellman Group 2: The exhibit’s mismatch is not resolved by adding DH group 2, and DH group must match when PFS is enabled. This option does not align the peers based on what’s shown.

C. Set Seconds to 43200: Phase 2 lifetime mismatches typically do not prevent Phase 2 from coming up (the negotiated lifetime can be adjusted by the peers). The hard blockers here are the selectors and proposal mismatch.

“This slide shows the SD-WAN rule lookup process. SD-WAN rules are essentially policy routes.”

“FortiGate performs a forwarding information base (FIB) lookup for the packet destination IP (dstip). If the resolved interface for the fib-best-match isn’t an SD-WAN member, then FortiGate moves on to the next rule. This behavior follows the key routing principle: SD-WAN rules are skipped if the best route to the destination isn’t an SD-WAN member .”

“If the resolved interface is an SD-WAN member, then FortiGate looks for one or more acceptable members in the oif list... An acceptable member is an alive member that has a route to the destination. This behavior follows the key routing principle: SD-WAN rules are skipped if none of the configured members in the rule have a valid route to the destination .”

“Because regular policy routes have precedence over any other routes...”

“Also note that policy routes have precedence over SD-WAN rules, and over any routes in the FIB.”

Technical Deep Dive:

The correct answers are A, C, and E .

A is correct because an SD-WAN rule is not enough by itself. A selected member must also be alive and have a valid route to the destination. If none of the members referenced by the rule can actually reach the destination, the rule is skipped.

C is correct because a regular policy route is evaluated before SD-WAN rules. This is a classic exam trap. FortiGate treats SD-WAN steering like policy-route logic, but standard policy routes still win if they match and are valid.

E is correct because FortiGate first checks the FIB best match . If that best route resolves to an interface that is not an SD-WAN member, FortiGate skips the SD-WAN rule and continues.

Why the others are wrong:

B is false because SD-WAN rules do not have precedence over everything; regular policy routes do.

D is false because the number of available routes is not the deciding rule. Even with only one route, SD-WAN can still steer traffic if the routing and member conditions are met.

Operationally, think of SD-WAN routing in this order: policy route check → SD-WAN rule lookup → standard FIB fallback . On FortiGate, the practical validation commands are:

get router info routing-table all

diagnose sys sdwan service

diagnose firewall proute list

That combination lets you confirm whether a packet is being captured by a policy route, whether an SD-WAN rule has acceptable members, and what the FIB currently resolves for the destination.

With a dialup IPsec VPN on FortiGate, when add-route is enabled, FortiGate will only install the corresponding route when it has enough negotiated information from the tunnel. In FortiOS 7.6, that means the route is tied to the Phase 2 (Quick Mode) selectors and is created dynamically when the IPsec SA is actually up.

B. The administrator must ensure phase 2 is successfully established

This is required. FortiGate does not install the add-route route just because Phase 1 exists or because the configuration is present. The route is added when the tunnel is effectively usable, which requires Phase 2 (IPsec SA) to be up. If Phase 2 is not established, there is no active SA and FortiGate will not inject the related route into the routing table.

So, if the static route is not showing, one correct explanation is that Phase 2 is not up.

C. The administrator must define the remote network correctly in the phase 2 selectors

This is also required. For dialup tunnels, FortiGate derives what route to add from the remote subnet(s) defined in the Phase 2 selector (proxy ID). If the remote network in Phase 2 is missing, incorrect, or too broad/too narrow in a way that prevents negotiation, the tunnel either won’t come up (so no route), or the route that would be installed won’t match what the administrator expects.

So, another correct explanation is that the Phase 2 remote network is not correctly defined, preventing the correct route from being created.

Why the other options are incorrect

A. Policy route instead of a static route

Add-route does not require policy routes. It is specifically a feature that injects a route (route-table entry) associated with the IPsec tunnel/SA and the Phase 2 selector networks.

D. Enable a dynamic routing protocol

Dynamic routing protocols (OSPF/BGP/RIP) are not required for add-route. Add-route is independent of dynamic routing and works by installing routes locally based on the negotiated selectors.

In the FortiGate Cloud-Native Firewall (CNF) for AWS architecture, traffic from workloads (such as an EC2 instance) in the customer VPC is redirected to the security service (FortiGate CNF) using AWS Gateway Load Balancer (GWLB) technology.

The key AWS component that must exist inside the customer VPC to steer workload traffic to the GWLB is the:

Gateway Load Balancer Endpoint (GWLBe)

This endpoint is what the customer VPC routes point to (for example, default route or subnet route entries), enabling transparent insertion of the FortiGate CNF inspection path for EC2 traffic.

Why the other options are not correct:

A: CNF does not “create the customer VPC” (that is customer-owned), and “GWLBe” is the only relevant created item here, not the whole VPC.

C: Customer VPC is not created by CNF, and GWLB is typically part of the CNF service side; the question specifically asks what must be created to handle traffic from the EC2 instance (that requires GWLBe in the customer VPC).

D: CNF does not create the Internet Gateway (IGW) in the customer VPC, and IGW is not the required CNF-created component for steering traffic to FortiGate CNF.

According to the FortiOS 7.6 Administrator Study Guide and official documentation, SD-WAN rules (services) determine the path selection for traffic matching specific criteria. Version 7.6 provides specific flexibility regarding how these strategies handle multiple member interfaces.

First, Manual with load balancing (Statement B) is a valid configuration. In the Manual strategy, the administrator orders interfaces by preference, but by enabling the Load balancing toggle, the FortiGate can distribute traffic across all members that are up.

Second, the Lowest Cost (SLA) strategy has been enhanced to support two modes. When the load balancing option is disabled, it acts as Lowest Cost (SLA) without load balancing (Statement A), selecting the single lowest-cost link that meets the SLA. Alternatively, by enabling the toggle, it functions as Lowest Cost (SLA) with load balancing (Statement D), where the FortiGate distributes traffic across all interfaces that satisfy the SLA target, regardless of their individual costs.

Statements C and E are incorrect because " Lowest Quality " is not a recognized SD-WAN strategy, and the Best Quality strategy is specifically a priority-based selection for a single " best " link, meaning the load balancing toggle is not available in the GUI when this mode is selected.