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Question 47 - NSE8_812 discussion

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A customer with a FortiDDoS 200F protecting their fibre optic internet connection from incoming traffic sees that all the traffic was dropped by the device even though they were not under a DoS attack. The traffic flow was restored after it was rebooted using the GUI. Which two options will prevent this situation in the future? (Choose two)

A.
Change the Adaptive Mode.
Answers
A.
Change the Adaptive Mode.
B.
Create an HA setup with a second FortiDDoS 200F
Answers
B.
Create an HA setup with a second FortiDDoS 200F
C.
Move the internet connection from the SFP interfaces to the LC interfaces
Answers
C.
Move the internet connection from the SFP interfaces to the LC interfaces
D.
Replace with a FortiDDoS 1500F
Answers
D.
Replace with a FortiDDoS 1500F
Suggested answer: A, B

Explanation:

To prevent the situation where all the traffic was dropped by the FortiDDoS 200F even though there was no DoS attack, the following options can be considered:

Change the Adaptive Mode. The Adaptive Mode is a feature that allows the FortiDDoS 200F to automatically adjust its detection and prevention thresholds based on the traffic patterns and behavior. However, if the Adaptive Mode is not configured properly, it may cause false positives and drop legitimate traffic. Therefore, changing the Adaptive Mode settings or disabling it may help to avoid this situation.

Create an HA setup with a second FortiDDoS 200F. The HA setup is a feature that allows two FortiDDoS 200F devices to work together as a cluster and provide redundancy and load balancing. If one device fails or drops traffic, the other device can take over and continue to protect the network.

Therefore, creating an HA setup with a second FortiDDoS 200F may help to avoid this situation.

Reference: https://docs.fortinet.com/document/fortiddos-f/6.2.0/handbook/380639/understandingfortiddos-adaptive-mode https://docs.fortinet.com/document/fortiddosf/ 6.2.0/handbook/380639/configuring-fortiddos-ha

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asked 18/09/2024
Marcelo Rubio Caiado
44 questions
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