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| Section | Objectives |
|---|---|
| FortiAnalyzer | - Troubleshoot device and communication issues - Troubleshoot logs and reports |
| System Troubleshooting | - Troubleshoot automation stitches - Troubleshoot connectivity problems using built-in tools - Troubleshoot resource problems using built-in tools - Troubleshoot HA - Troubleshoot Security Fabric and FortiOS connectivity |
| VPNs | - Troubleshoot IPsec IKE version 1 and 2 |
| Security Profiles | - Troubleshoot web filtering issues - Troubleshoot FortiGuard issues - Troubleshoot the intrusion prevention system (IPS) |
| Authentication | - Troubleshoot Fortinet Single Sign-On (FSSO) - Troubleshoot local and remote authentication |
| FortiManager | - Troubleshoot FortiManager HA - Troubleshoot policy and object management - Troubleshoot device-level and ADOM-level issues |
| Routing | - Troubleshoot routing packets using static routes, policy routes, and OSPF |
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NEW QUESTION # 87
Exhibit.
Refer to the exhibit, which contains a screenshot of some phase 1 settings.
The VPN is not up. To diagnose the issue, the administrator enters the following CLI commands on an SSH session on FortiGate:
However, the IKE real-time debug does not show any output. Why?
Answer: C
Explanation:
To display debug output on FortiGate devices, you must always run both the application-specific debug command and the global debug enable command. The command diagnose debug application ike -1 sets up the detail level for the IKE daemon debug, but it does not display any debug output on its own. As described in the FortiOS CLI debugging manuals, the command diagnose debug enable activates debug output on the console, making all previously set debugs visible. This is especially important for VPN troubleshooting- without the enable command, no output appears even if there is VPN traffic.
The correct diagnostic sequence is:
diagnose debug application ike -1
diagnose debug enable
This procedure is found in every FortiOS CLI debug tutorial and troubleshooting workflow.
References:
FortiOS CLI Reference: Debugging VPNs and Real-time Debug Output
FortiGate VPN Troubleshooting Guide: Required Steps for Debug Output
NEW QUESTION # 88
Refer to the exhibit.
The port1 interface configuration on FortiGate and partial session information for ICMP traffic are shown.
Which two things happen to the session information if a routing change occurs that affects this session?
(Choose two answers)
Answer: A,C
Explanation:
The correct answers are A and C .
The exhibit shows that preserve-session-route is enabled on port1:
config system interface
edit " port1 "
set preserve-session-route enable
next
end
The study guide explains the effect of this setting exactly:
"enable: FortiGate marks existing session routing information as persistent, and applies only the modified routes to new sessions" It also states:
"The current route must still be present in the FIB. Otherwise, FortiGate flags the session as dirty and reevaluates it" And the same page further clarifies:
"If you enable this setting, sessions passing through that interface continue to pass without being affected by the routing changes. The routing changes apply only to new sessions. If the route is removed from the FIB, then FortiGate must flag the session as dirty, flush its gateway information, and reevaluate the session." This proves:
* A is correct because with preserve-session-route enable, existing sessions are normally preserved and routing changes apply only to new sessions.
* C is correct because the session remains unchanged unless the current route is removed from the FIB
/routing table, in which case FortiGate dirties and reevaluates the session.
Why the other options are wrong:
* B is wrong because when the active route is removed, FortiGate does not simply mark the session dirty and stop there. The study guide says it "flags the session as dirty and reevaluates it" , which means route lookup happens again.
* D is wrong because the session does change if the active route is removed. FortiGate flushes gateway information and reevaluates the session.
So the verified answers are: A, C .
NEW QUESTION # 89
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: B
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 # 90 
The output of a policy route table entry is shown.
Which type of policy route does the output show?
Answer: B
Explanation:
To determine the type of policy route, we must interpret the specific flags and fields visible in the diagnose firewall proute list (or similar kernel table) output provided in the exhibit
* Identify Key Indicators:
* The most critical field in the output is vwl_service=1(test123).
* It also lists vwl_mbr_seq=1 5.
* Decode the Terminology:
* vwl: This stands for Virtual WAN Link. In FortiOS, "Virtual WAN Link" is the legacy internal name for the SD-WAN feature. Even in newer firmware versions (7.x), the kernel and CLI debugs often still refer to SD-WAN objects as vwl.
* vwl_service: This specifically refers to an SD-WAN Rule (also known as an SD-WAN Service).
The name (test123) is the name given to that specific SD-WAN rule by the administrator.
* Evaluate the Options:
* A & D (Regular Policy Route): Standard policy routes (configured under config router policy) do not carry the vwl_service tag. They are typically identified by simple gateway or interface instructions without the SD-WAN service abstraction.
* B (ISDB Route): While SD-WAN rules can use the Internet Service Database (ISDB) as a destination, the structure of the route entry shown here-specifically defined by a vwl_service ID-classifies it fundamentally as an SD-WAN rule, regardless of the destination object.
* C (An SD-WAN rule): The presence of vwl_service and vwl_mbr_seq (SD-WAN member sequence) definitively identifies this entry as a rule generated by the SD-WAN subsystem.
Conclusion: The output shows a route controlled by the SD-WAN engine (vwl), confirming it is an SD-WAN rule.
Reference:
FortiGate Security 7.6 Study Guide (SD-WAN): "In the kernel routing table and debugs, SD-WAN rules are often referenced as vwl (Virtual WAN Link) services. The vwl_service field indicates the specific SD- WAN rule ID and name."
NEW QUESTION # 91
Exhibit.
Refer to the exhibit, which shows the output of diagnose automation test.
What can you observe from the output? (Choose two.)
Answer: A,C
NEW QUESTION # 92
......
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