How to judge whether a TCP connection is successful

When I enabled packetbeat FLOW
How to judge whether the connection to the port succeeds or fails from the data returned by packetbeat
I compared the successful and unsuccessful two returned data, as if there was no difference

After viewing the previous topic, this function should not be supported yet

Yup, it's more like a wish today: Packetbeat flows enhancements · Issue #3444 · elastic/beats · GitHub

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