I have captured TCP packet handshake in my nodes, the TCP handshake look very strange, I called A is the sender and B is the receiver
then it's strange that A continues send a duplicated ACK, then B sends to A an TCP out of order of packet [SYN,ACK]
Could you please let me know how [SYN,ACK] can be out-of-order and why A sends TCP dup ACK 3 times in this case?
Thanks a lot, Brs Naruto
asked 16 Oct '17, 03:06
I'd say you have problems with the ACKs from A not getting through to B. I guess the picture at node B looks like this:
You should capture at B to verify if packets are lost.
answered 16 Oct '17, 03:48
edited 16 Oct '17, 06:07