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| Section | Objectives |
|---|---|
| Routing | - Troubleshoot routing packets using static routes, policy routes, and OSPF |
| FortiAnalyzer | - Troubleshoot device and communication issues - Troubleshoot logs and reports |
| VPNs | - Troubleshoot IPsec IKE version 1 and 2 |
| System Troubleshooting | - Troubleshoot connectivity problems using built-in tools - Troubleshoot resource problems using built-in tools - Troubleshoot automation stitches - Troubleshoot HA - Troubleshoot Security Fabric and FortiOS connectivity |
| FortiManager | - Troubleshoot device-level and ADOM-level issues - Troubleshoot FortiManager HA - Troubleshoot policy and object management |
| 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 |
>> FCSS_NST_SE-7.6 Exam Cram Questions <<
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NEW QUESTION # 85
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,C
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 # 86
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,C
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 # 87
Refer to the exhibit, which shows the output of a debug command.
Which two statements about the output are true? (Choose two.)
Answer: A,D
Explanation:
References:
FortiOS Admin Guide: OSPF, Debug Outputs
NEW QUESTION # 88
Refer to the exhibit, which shows the output of a BGP debug command.
What can you conclude about the router in this scenario?
Answer: D
NEW QUESTION # 89
Exhibit.
Refer to the exhibit, which shows the output of diagnose automation test.
What can you observe from the output? (Choose two.)
Answer: C,D
NEW QUESTION # 90
......
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