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Fortinet FCSS_NST_SE-7.6 Exam Syllabus Topics:

SectionWeightObjectives
Firewall Policies & Access Control20%- Policy configuration, sequencing and optimization
  • 1. Implicit/explicit deny rules and logging
  • 2. NAT, IP pools and central NAT troubleshooting
- Security profiles and inspection
  • 1. Web filtering, application control, IPS and DNS filtering
  • 2. SSL/SSH inspection and certificate management
Authentication & Identity Management5%- Local and remote authentication
  • 1. LDAP, RADIUS and TACACS+ integration
  • 2. Fortinet Single Sign-On (FSSO) issues
Logging, Monitoring & Incident Response10%- Log management and analysis
  • 1. FortiAnalyzer and FortiManager integration
  • 2. Debug commands, packet capture and flow logs
- Incident handling and troubleshooting methodology
  • 1. Change control and problem resolution processes
  • 2. Escalation procedures to Fortinet TAC
Routing & Network Segmentation15%- Network segmentation and VDOMs
  • 1. VLAN, zone-based policy and VDOM operation
  • 2. Packet flow and connectivity diagnosis
- Static and dynamic routing protocols
  • 1. ECMP, policy routing and route redistribution
  • 2. OSPF and BGP configuration and troubleshooting
SD-WAN & WAN Optimization10%- SD-WAN deployment and traffic steering
  • 1. Overlay tunnels and link selection
  • 2. SLA monitoring and performance issues
VPN & Secure Connectivity15%- SSL VPN
  • 1. User authentication and access control
  • 2. Portal and tunnel mode configuration problems
- IPsec VPN
  • 1. Site-to-site and remote access VPN troubleshooting
  • 2. Phase 1/2 negotiation and establishment issues
Security Fabric & System Troubleshooting25%- High Availability (HA) troubleshooting
  • 1. FGCP/FGSP cluster operation and failover issues
  • 2. Session synchronization and split-brain scenarios
- Security Fabric integration and operation
  • 1. Fabric discovery and communication issues
  • 2. Automation stitches and workflow problems
- FortiGate system and resource management
  • 1. Performance and resource utilization diagnosis
  • 2. Firmware upgrade, patch management and hardening

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Fortinet FCSS - Network Security 7.6 Support Engineer Sample Questions (Q122-Q127):

NEW QUESTION # 122
Which statement about IKEv2 is true?

Answer: B


NEW QUESTION # 123
During which phase of IKEv2 does the Diffie-Helman key exchange take place?

Answer: B


NEW QUESTION # 124
Refer to the exhibit, which shows partial outputs from two routing debug commands.

Which change must an administrator make on FortiGate to route web traffic from internal users to the internet, using ECMP?

Answer: C

Explanation:
The 7.6 study guide explains the route selection order:
"Route Selection Process
* Most specific route
* Lowest distance
* Lowest metric (dynamic routes)
* Lowest priority (static routes)
* ECMP (static, BGP, and OSPF routes)"**
It then states:
"If there are multiple routes with the same netmask, distance, metric, and priority, FortiGate shares the traffic among all of them. This is called equal-cost multi-path (ECMP)." The FortiOS administration guide confirms the ECMP prerequisite:
"Routes must have the same destination and costs. In the case of static routes costs include distance and priority." In the exhibit, the kernel/FIB output shows the two default routes as:
* gwy=100.64.1.254 dev=3 (port1) prio=0
* gwy=100.64.2.254 dev=6 (port2) prio=10
So although both are default routes, their priorities are different . Since FortiGate uses the FIB/kernel for forwarding traffic, ECMP will not happen until the static-route priorities are the same. The study guide also notes that the FIB is the table used to perform standard routing Therefore, to make the two default routes eligible for ECMP, the administrator must make the priorities equal.
Since port2 is already 10, the needed change is to set the port1 default route priority to 10.
Why the other options are wrong:
* A is wrong because snat-route-change affects how existing SNAT sessions react to routing changes, not whether static routes qualify for ECMP
* B is wrong because changing port2 to priority 1 still would not match port1 at 0, so the routes still would not have equal cost for ECMP
* C is wrong because preserve-session-route affects existing-session route persistence after routing changes, not ECMP qualification


NEW QUESTION # 125
A VPN tunnel is up. To monitor traffic flow, the administrator enters the following CLI commands on an SSH session on FortiGate:
# diagnose debug enable
# diagnose sniffer packet any ' udp and port 500 ' 4
However, the sniffer does not show any output. Assuming default configuration values, what are two possible reasons there is no output? (Choose two answers)

Answer: A,D

Explanation:
The correct answers are A and B .
The study guide says:
"If NAT-T is enabled, and there is a FortiGate located in the middle that is running NAT, the sniffer command must use a different filter. In this case, IKE traffic uses UDP port 500, but switches to UDP port 4500 during the tunnel negotiation. Additionally, ESP traffic is encapsulated inside the UDP 4500 channel." It also says:
"In some networks, UDP is blocked by firewalls or ISPs. In those cases, you can configure your VPN tunnel to use IKE over TCP in the phase 1 configuration. The default IKE TCP port is 443..." And the study guide gives the correct capture examples:
* No NAT: host < remote-gw > and udp port 500
* With NAT and NAT-T: host < remote-gw > and (udp port 500 or udp port 4500) So:
* B is correct because with NAT Traversal enabled , the tunnel may no longer be using only UDP 500 .
It can move to UDP 4500 , so the current filter may miss the traffic.
* A is correct because the filter may need to be expanded to include UDP 4500 for NAT-T, or TCP 443 when IKE over TCP is used.
Why the other options are wrong:
* C is wrong because restricting the filter to the remote peer IP can make the capture more precise, but it is not required for the sniffer to display output. The problem here is the port/protocol choice , not the lack of a host filter. The study guide examples use host filtering as an aid, not as a requirement.
* D is wrong because diagnose debug enable is used to enable real-time debug output for applications, but it does not suppress or invalidate sniffer output . Sniffer capture is a separate command path.
Fortinet documentation separately documents diagnose sniffer packet ... for packet capture and diagnose debug enable for debug features.
So the verified answers are: A, B .


NEW QUESTION # 126
Refer to the exhibit.

FortiGate is showing continuous high CPU usage During a maintenance window, the CLI command diagnose sys top displays the output shown in the exhibit. The CLI command diagnose twat application ipsmonitor 5 was run. but the CPU usage by daemon ipsengine did not drop Which immediate action can you take to reduce the CPU usage effectively?

Answer: C

Explanation:
To solve this high CPU usage scenario involving the ipsengine, we must understand the specific functions of the diagnose test application ipsmonitor commands shown in the troubleshooting steps.
Analyze the Situation:
Exhibit: The diagnose sys top output shows the ipsengine process is in a run state (R) consuming 99% CPU.
Previous Action: The administrator already ran diagnose test application ipsmonitor 5.
Result: The CPU usage did not drop.
Understand the Commands:
diagnose test application ipsmonitor 5: This command toggles IPS Bypass Mode. When enabled, the IPS engine lets traffic pass through without inspection.
Implication: If the CPU was high due to traffic volume, enabling bypass would drop the CPU load immediately.
Failure: Since the CPU remained at 99% after bypass, the ipsengine process is likely frozen, stuck, or in an internal infinite loop unrelated to the current traffic flow. The process itself is the problem, not the traffic volume.
Evaluate the Solution (Option B):
diagnose test application ipsmonitor 2: This command toggles the IPS engine ' s Enable/Disable status.
Because the engine is stuck (bypass failed to relieve pressure), the " Immediate action " required is to stop or restart the process entirely.
Running option 2 effectively disables/kills the stuck IPS engine instance, which will immediately drop the CPU usage to near zero. (It can then be toggled again to restart it).
Why other options are incorrect:
A (Reduce signatures): This is a tuning measure for normal operation, not an immediate fix for a stuck process at 99% CPU.
C (Disable IPS on policies): This is a configuration change that takes time and requires a commit; it is not the most immediate diagnostic tool available.
D (Bypass all IPS engines): This describes the action of command 5 (Bypass), which the prompt explicitly states was already performed and failed.
Reference:
FortiGate Security 7.6 Study Guide (IPS & Diagnostics): " Troubleshooting IPS high CPU: 1. Check top. 2.
Try bypass (ipsmonitor 5). 3. If CPU persists, restart the engine (ipsmonitor 99 or 2). "


NEW QUESTION # 127
......

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