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NEW QUESTION # 131
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 # 132
Refer to the exhibit, which shows the output of get router info ospf neighbor.
What can you conclude from the command output?
Answer: D
NEW QUESTION # 133
Refer to the exhibit.
A partial output of diagnose npu up6 port-list on FortiGate 2000E is shown.
An administrator is unable to analyze traffic flowing between port1 and port17 using the diagnose sniffer command.
Which two commands allow the administrator to view the traffic? (Choose two.)
Answer: B,C
Explanation:
The administrator cannot see traffic in the sniffer because it is being offloaded to the NPU (NP6). To view the traffic, offloading must be disabled so packets pass through the CPU.
B). config firewall policy ... set auto-asic-offload disable: This is the recommended method to troubleshoot specific traffic. By disabling ASIC offloading in the relevant firewall policies (Policies 5 and 17 in the exhibit), traffic is forced to the CPU and becomes visible to the sniffer.
C). diagnose npu np6 fastpath disable 1: This command temporarily disables the fastpath processing on the specific NP6 processor (ID 1) handling the ports. This forces all traffic handled by that NPU to the CPU, allowing the sniffer to capture it.
Incorrect Options: Option A uses invalid syntax (port-list disable is not a valid command). Option D (config system npu) is not the standard method for granular troubleshooting.
NEW QUESTION # 134
Refer to the exhibit, which shows the output of a debug command.
Which two statements about the output are true? (Choose two.)
Answer: A,C
Explanation:
References:
FortiOS Admin Guide: OSPF, Debug Outputs
NEW QUESTION # 135
Refer to the exhibits.
FGT-1 is an area border router (ABR) that has interfaces in OSPF areas 0.0.0.0 and 0.0.0.5. FGT-3 acts as an autonomous system border router (ASBR), importing static routes into OSPF. FGT-2 is an internal router with all its interfaces belonging to area 0.0.0.5. FGT-1 is receiving all advertised routes from FGT-2, however, FGT-3 is not receiving any of the advertised routes from FGT-1. What is the most likely reason for this?
(Choose one answer)
Answer: D
Explanation:
The get router info ospf database brief output on FGT-2 clearly indicates that Area 0.0.0.5 is configured as a
[Stub] area.
In OSPF, a Stub Area is specifically designed to reduce the size of the Link State Database (LSDB) on internal routers. The primary behavior of a Stub area is that it does not accept Type 5 (AS External) LSAs.
* FGT-3 is the ASBR (Autonomous System Border Router) and is importing static routes, which are generated as Type 5 LSAs in the OSPF domain.
* FGT-1 acts as the ABR (Area Border Router). Because Area 0.0.0.5 is a Stub area, FGT-1 blocks these Type 5 LSAs from entering Area 0.0.0.5.
* Consequently, FGT-2 will not receive the specific external routes advertised by FGT-3. Instead, the ABR (FGT-1) injects a default route (0.0.0.0/0) into the Stub area to allow connectivity to the external world, which is visible in the database output.
While the question text mentions FGT-3 not receiving routes, the definitive configuration shown in the exhibit is the Stub area setting, which directly corresponds to the blocking of Type 5 LSA propagation (Option A).
NEW QUESTION # 136
......
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