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Filtering dropped packages

Hi.

What is the appropriate way to package capture dropped packets using tcpdump?

Lets say I want to capture all dropped packages on eth3 to or from 1.2.3.4?

I guess it is something like:

tcpdump -i eth3 host 1.2.3.4

... but as I see, this is only capturing passed packets. How to do the opposite?

Regards, Lars.


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