NSE4_FGT_AD-7.6 Exam Dumps - Fortinet NSE 4 - FortiOS 7.6 Administrator

From the exhibits:

System performance output

Memory used: 90%

Free memory: ~5%

Default memory thresholds (FortiOS 7.6)

memory-use-threshold-green 82%

memory-use-threshold-red 88%

memory-use-threshold-extreme 89%

Because memory usage (90%) exceeds the extreme threshold (89%), the FortiGate enters conserve mode.

Effects of conserve mode (FortiOS 7.6 – verified)

B. FortiGate has entered conserve mode.

Correct

When memory usage exceeds the red/extreme threshold, FortiGate automatically enters conserve mode.

This is exactly the condition shown in the system performance output.

D. Administrators can change the configuration.

Correct

Even in conserve mode:

Administrators can still log in (GUI, SSH, console)

Configuration changes are allowed

FortiGate does not lock configuration access during conserve mode.

This behavior is explicitly documented in the FortiOS 7.6 Conserve Mode section.

Why the other options are incorrect

A. Administrators can access FortiGate only through the console port.

Incorrect

Network access (GUI/SSH) is still available in conserve mode unless otherwise restricted.

Console-only access is not a conserve-mode requirement.

C. FortiGate drops new sessions.

Incorrect (as a general statement)

FortiGate may drop or bypass new inspection-required sessions depending on fail-open/fail-close settings.

It does not universally drop all new sessions, so this statement is not always true.

In FortiOS 7.6, web filter profiles are inspection-mode dependent. Certain advanced web filtering features—such as daily category usage quota—are only supported when the firewall policy is operating in proxy-based inspection mode.

Why the profile is not visible

The profile restrictmedia-profile includes a daily category usage quota.

Daily quotas are a proxy-based web filtering feature.

If the firewall policy is configured with:

Inspection mode: Flow-based

Then FortiGate will not display proxy-only web filter profiles in the Web Filter drop-down list.

FortiGate automatically filters the available profiles based on feature compatibility with the policy’s inspection mode.

This behavior is explicitly documented in the FortiOS 7.6 Web Filtering and Inspection Mode Compatibility sections.

Why the other options are incorrect

A. Already referenced in another firewall policyWeb filter profiles can be reused across multiple policies. This does not hide them.

B. Firewall policy is in no-inspection mode instead of deep-inspectionSSL inspection depth affects HTTPS visibility, not whether a web filter profile appears in the drop-down list.

C. Naming convention restrictionFortiOS does not restrict profile selection based on naming conventions.

“The example on this slide shows how FortiGate handles two incoming connections to the same external address, but on different ports... Both connections match the firewall policy ID, which references two VIPs as destination.”

“In FortiOS, VIPs and firewall address objects are completely different. They are stored separately with no overlap. Starting in version 7.2.4, the parameter match-vip is enable by default and allows the firewall address objects to match VIPs.”

“In the example shown on this slide, the destination of the first firewall policy is set to all . This means all destination addresses (0.0.0.0/0), by default, including the external addresses defined on the VIPs.”

Technical Deep Dive:

The correct answer is C. Set the Destination address as Webserver in the Deny policy.

FortiGate allows VIP objects to be used as destination objects in firewall policies . The study guide explicitly shows incoming connections matching firewall policies that reference VIPs as the destination. That means if the administrator wants to deny only Remote-User2 → Webserver , the clean and specific way is to set the Destination in the Deny policy to the Webserver VIP .

Why this is the best answer:

With the default deny-policy behavior, destination = all plus match-vip enabled by default means the deny rule can match VIP external addresses too.

But that is broader than necessary. If the intent is specifically to block access only to the published Webserver , then the deny rule should explicitly reference the Webserver VIP as the destination.

Why the other options are wrong:

A is incorrect because match-vip is relevant to deny policy behavior, and the study guide notes that match-vip is available only when the firewall policy action is set to DENY . An allow policy is not where this setting applies.

B is unrelated. IP pools are for SNAT behavior, not for selectively denying inbound access to a VIP.

D is incorrect because Deny_IP is the source object representing the remote user, not the destination web server.

So the proper additional configuration is to make the deny policy specific by setting:

Source = Deny_IP

Destination = Webserver

Action = DENY

That blocks Remote-User2 from the VIP-published web server while still allowing Remote-User1 to reach it through the lower allow policy.

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.

From the exhibits:

The Web Filter profile is configured with Feature set = Flow-based.

The Firewall policy is configured with Inspection mode = Proxy-based and has Web Filter enabled.

In FortiOS 7.6, security profiles that have a feature set selection (Flow-based vs Proxy-based) must match the inspection mode used by the firewall policy. If the profile’s feature set does not match the policy’s inspection mode, the profile behavior will not align with what the administrator expects (and in many cases FortiOS will prevent correct use/selection, or the feature behavior will not apply as intended).

That mismatch explains why the configured URL filter entry for www.facebook.com (set to Monitor) is not producing the expected result, and instead the session is being evaluated by category rating and blocked (shown as Malicious Websites on the FortiGuard block page).

Why the other options are not the best fit:

A: A web rating override is not shown in the exhibits, and nothing indicates an override misconfiguration.

C: While the policy inspection mode could be changed, the root cause shown is the profile feature set mismatch (profile is Flow-based).

D: The URL filter action shown is Monitor, which would not produce a block page by itself.