7. SYN Cookie: Troubleshooting Stats

Introduction In this article I will explain what SYN Cookie stats you can consult and their meaning. There are more complex stats than the explained in this article but they are intended for helpin...
Updated Feb 14, 2025
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Javier_Velasco's avatar
Javier_Velasco
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Jan 22, 2025

Hi Taut_SRISOMCHAI 

I'm so sorry but never got a warning about your question, or if I received it I missed it. Although clearly this answer reach you late maybe can be useful for someone else.

There are three situations:

  • Accepted: Client sends a correct response to SYN/ACK (cookie).
  • Rejected: Client sends a wrong response to SYN/ACK (cookie).
  • Generated - (accepted+rejected): Client does not even send a response to SYN/ACK (cookie). Typically DoS using tools like hping3 for example.

Regards

Taut_SRISOMCHAI's avatar
Taut_SRISOMCHAI
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Apr 09, 2025

Hi Javier_Velasco ,

Million thanks for your valued answer.  Yes, I found there is no any notice until today login.