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Old 09-17-2019, 05:07 AM   #1
Pieter Cardoen
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Registered: Apr 2017
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Extremely high ksoftirqd when UDP flooding an embedded device


I am trying to make my embedded device robust against DoS attack but I notice that the system has a tremendously high ksoftirqd load causing the system to hang completely.

I am testing the system by pushing a large number of UDP messages to the system (> 250k messages per second).

Is there a way to protect our system against an attack of this kind?
Could we use traffic control or iptables for this?

This has been tested on a custom board with imx6ul processor.

Old 09-19-2019, 03:02 PM   #2
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You can try ebtables tool, working on layer 2.
Old 09-20-2019, 03:09 AM   #3
Pieter Cardoen
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I have got a look at ebtables cause I never heard about it. I however have some doubts if it could be useful for my use case. If I look at the example of rate shaping, then it relies on tc to implement the traffic shaping. See example 'rate shaping':

Thanks for the input!



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