Exam: FCSS_NST_SE-7.6

Exam details
Exam Name: FCSS - Network Security 7.6 Support Engineer
Exam Code: FCSS_NST_SE-7.6
Duration: 75 minutes
Number of Questions: 40
Question Format: Multiple-choice
Language: English
Product Version: FortiOS 7.6
Scoring: Pass/Fail
Registration: Available through Pearson VU

Description
The FCSS in Secure Networking certification validates your ability to design, administer, monitor, and troubleshoot Fortinet network security solutions. This curriculum covers network security infrastructures using advanced Fortinet solutions.

Who Should Attempt the FCSS in Secure Networking Certification?
We recommend this certification for cybersecurity professionals who require the expertise needed to design, manage, support, and analyze advanced Fortinet network security solutions.
Program Requirements

FCSS_NST_SE-7.6 Exam Topics

FortiGate Core Security Architecture
* FortiOS 7.6 architecture & components
* Security fabric integration
* Traffic flow & session handling
* Inspection modes (Proxy / Flow)
* NGFW features & profiles

Firewall Policies & Access Control
* Policy configuration & sequencing
* Central NAT & IP pools
* Policy-based vs. profile-based NGFW
* Application control & web filtering
* Implicit/Explicit deny behavior

User & Device Authentication
* Local/RADIUS/LDAP authentication
* Single Sign-On (FSSO)
* Certificate-based authentication
* Identity-based policies & device groups
* Zero Trust Network Access concepts

Advanced Security Profiles
* IPS configuration & tuning
* Antivirus & malware protection
* SSL inspection (full / certificate)
* DoS protection & anomaly detection
* DNS filtering & content security

Routing & Network Design
* Static & dynamic routing (OSPF, BGP, RIP)
* ECMP, policy routing & multicast
* Link monitoring
* VRFs & segmentation strategies

VPN & Secure Connectivity
* IPsec site-to-site & remote access
* SSL VPN portal & tunnel modes
* Redundancy, failover & performance
* Troubleshooting VPN phase 1/2
* Certificates & encryption choices

SD-WAN & WAN Optimization
* SD-WAN rules, SLA, performance SLAs
* Link load balancing & steering
* Overlay tunnels
* Application-aware routing

High Availability (HA)
* Active-passive / Active-active modes
* Session sync and failover behavior
* Split-brain & HA troubleshooting
* Virtual clustering (FGSP, FGCP)

Logging, Monitoring & Analytics
* Log types & storage
* FortiAnalyzer & FortiManager integration
* Packet capture, diag debug, flow logs
* Event handling & automation stitches

Troubleshooting & Performance
* CPU/memory analysis
* Hardware acceleration (NP/CP)
* Session table analysis
* Latency, throughput & bottlenecks
* Common CLI diagnostic tools

Recommended Prerequisites
* Strong hands-on FortiGate experience
* Prior NSE 4 / FCNSP-level knowledge
* Understanding of networking (TCP/IP, routing, VPN)

Format (Typical Expectations)
* Scenario-based questions
* Advanced configuration knowledge
* Troubleshooting case studies

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QUESTION 1
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?

A. FortiGate uses the SNI from the user's web browser.
B. FortiGate closes the connection because this represents an invalid SSL/TLS configuration.
C. FortiGate uses the first entry listed in the SAN field in the server certificate.
D. FortiGate uses the CN information from the Subject field in the server certificate.

Answer: D

Explanation:
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:
â€oeCheck 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.
Reference:
FortiGate 7.6.4 Administration Guide: Certificate Inspection
SSL/SSH Inspection Profile Configuration

QUESTION 2
Exhibit.
Refer to the exhibit, which contains partial output from an IKE real-time debug.
Which two statements about this debug output are correct? (Choose two.)

A. Perfect Forward Secrecy (PFS) is enabled in the configuration.
B. The local gateway IP address is 10.0.0.1.
C. It shows a phase 2 negotiation.
D. The initiator provided remote as its IPsec peer ID.

Answer: C, D

Explanation:
From the exhibit, you can observe that the debug output captures an IKEv1 negotiation in aggressive
mode. Let's break down the supporting details in line with official Fortinet IPsec VPN troubleshooting
resources and debug guides:
For Option B:
The very first line of the debug output shows:
comes 10.0.0.2:500->10.0.0.1:500, ifindex=7.
This indicates the traffic direction—from the remote IP (10.0.0.2) with port 500 to the local IP
(10.0.0.1) with port 500. According to Fortinet's documentation, the right side of the arrow always
represents the local FortiGate gateway. Thus, 10.0.0.1 is the local gateway IP address.
For Option D:
You see the statement:
negotiation result "remote"
and
received peer identifier FQDNCE88525E7DE7F00D6C2D3C00000000
Official debug documentation describes that the "peer identifier" or peer ID sent by the initiator is
displayed here. In the context of IKE/IPsec negotiation, this value is used as the IPsec peer ID for
authentication and identification purposes. The initiator is providing "remote" as the peer ID for its
connection.
Why Not A or C:
Perfect Forward Secrecy (PFS): The debug does not show any DH group negotiation in phase 2 (no
reference to group2, group5, etc., for phase 2), so you cannot deduce the presence of PFS solely from
this output.
Phase 2 negotiation: The log focuses on IKE (phase 1) negotiation and establishment; there’s no
reference to ESP protocol, Quick Mode, or other identifiers that would show phase 2 SA negotiation
and establishment.
This interpretation aligns with the explanation in the FortiOS 7.6.4 Administration Guide's VPN
section and the official debug command output samples published in Fortinet’s documentation. It
demonstrates how to distinguish between local and remote addresses and how to identify the use of
peer IDs.
Reference:
FortiOS 7.6.4 Administration Guide: IPsec VPN and Debugging VPNs
Technical Support Resources on interpreting IKE debug output and peer ID roles

QUESTION 3
Exhibit.
Refer to the exhibit, which shows the output of a diagnose command.
What can you conclude about the debug output in this scenario?

A. The first server provided to FortiGate when it performed a DNS query looking for a list of rating servers, was 121.111.236.179.
B. There is a natural correlation between the value in the FortiGuard-requests field and the value in the Weight field.
C. FortiGate used 64.26.151.37 as the initial server to validate its contract.
D. Servers with a negative TZ value are less preferred for rating requests.

Answer: C

Explanation:
The exhibit displays the output from the diagnose debug rating command on a FortiGate device. This
command is used to display information about FortiGuard Web Filtering or other security-related
queries performed by FortiGate to FortiGuard servers. Official Fortinet documentation outlines the
meaning of each field in the server list. The FortiGate maintains a list of available FortiGuard servers,
selecting the optimal server based on factors such as weight, round-trip time (RTT), and regional settings.
The very first entry in the server list after "Server List" is the server FortiGate initially uses, prioritized
by factors such as proximity and RTT. Here, 64.26.151.37 is listed first, and the FortiGuard-requests
value confirms that this server handled the highest number of requests.
The IPs, weights, and lost/failed counters are monitored for server performance and selection over
time. FortiGate's default operational logic is to try the first entry for contract validation and use the
next in the list if the first is unavailable or has high latency or packet loss.
There is no direct correlation between the Weight and the number of FortiGuard-requests. The
servers with higher or lower weights may still handle different request volumes based on availability
and performance.
The TZ (time zone) value's sign (positive or negative) does not affect server preference; it is
informational, showing the server's location relative to UTC, not a rating metric.
DNS query results for FortiGuard servers are not shown here, and the provided servers are not
returned in DNS query order.
This command and interpretation are detailed in the FortiOS Administration Guide’s section
describing FortiGuard server selection and contract validation processes.
Reference:
FortiOS Administration Guide: FortiGuard Service Connectivity and Debugging
Official Technical Notes on diagnose debug rating output structure

QUESTION 4
Refer to the exhibit, which shows the output of a policy route table entry.
Which type of policy route does the output show?

A. An ISDB route
B. A regular policy route
C. A regular policy route, which is associated with an active static route in the FIB
D. An SD-WAN rule

Answer: A

Explanation:
The exhibit for question 4 shows a policy route table entry, and key fields are as follows:
internet service(1) : Fortinet-FortiGuard(1245324,0.0.0.0,0.0.0.0)
According to the Fortinet official documentation, when a policy route is based on Internet Service
Database (ISDB) entries, the route entry will specifically mention â€oeinternet service,†showing the
service being referenced (in this example, Fortinet-FortiGuard). This is fundamentally different from a
regular policy route, which is defined by source, destination, and service wildcards without
referencing an ISDB signature. A regular policy route's output would not contain the line â€oeinternet service.â€
Policy routes that use ISDB allow FortiGate to steer traffic for specific well-known services (like
FortiGuard, Google, Microsoft) based on traffic pattern recognition, even if the destination IP is
dynamic. The matching and route selection follow the ISDB tag and can coexist with static or regular
policy routes.
Thus, this entry is correctly and uniquely an ISDB route, as explained in the FortiOS policy routing
documentation and ISDB configuration references.
Reference:
FortiOS Administration Guide: Policy Routing, ISDB integration and interpretation of route table entries
ISDB-based Routing and Official CLI Outputs in Fortinet’s documentation

QUESTION 5
Exhibit.
Refer to the exhibit, which shows a FortiGate configuration.
An administrator is troubleshooting a web filter issue on FortiGate. The administrator has configured
a web filter profile and applied it to a policy; however the web filter is not inspecting any traffic that
is passing through the policy.
What must the administrator do to fix the issue?

A. Disable webfilter-force-off.
B. Increase webfilter-timeout.
C. Enable fortiguard-anycast.
D. Change protocol to TCP.

Answer: A

Explanation:
The exhibit shows a FortiGate configuration under config system fortiguard related to web filtering
and FortiGuard options. There is a line:
set webfilter-force-off enable
According to official Fortinet documentation, the "webfilter-force-off" option, when enabled, causes

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