Forum Discussion

cwkim_261931's avatar
cwkim_261931
Icon for Nimbostratus rankNimbostratus
Oct 18, 2018

The client sends a push-ack instead of ack to the response packet to syn-ack.

Hi

 

I have strange issue.

 

I know 3way-handshake is SYN->SYN-ACK->ACK.

 

But Someone is SYN->SYN-ACK->PUSH-ACK.....

 

What happen it is?

 

Is it normal?!

 

I guess, BIG-IP dorp it as not sequence 3way hand-shake..

 

somebody help me!!!

 

Plz.

 

application delivery
BIG-IP
LTM
  • F5_Learner_3295's avatar
    F5_Learner_3295
    Icon for Nimbostratus rankNimbostratus
    Oct 19, 2018

    Hi ,

     

    Can you paste the logs which shows sequence process.

     

    This is basic TCP communications flow. The ACK indicates that a host is acknowledging having received some data, and the PSH,ACK indicates the host is acknowledging receipt of some previous data and also transmitting some more data.

    Regards