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why only the first packet retransmission I did an experiment about retransmission. I am confused that why from 15:23:17

Hi, We are facing a peculiar issue in our network. From the ethreal packet capture on the client side, I see the following behaviour which appears quite strange to me:

#1 Client --> Server  [SYN] seq=0
#2 Server --> Client  [SYN, ACK] seq=0 ack=1
#3 Client --> Server  [ACK] seq=1 ack =1 
#4 Client --> Server  [PSH] seq=1 ack =1 len=488
#5 Client --> Server  [FIN, ACK] seq =489 ack =1 
#6 Server --> Client  [SYN, ACK] seq=0 ack=1 retransmission 
#7 Client --> Server  [ACK] seq=490 ack=1( I don't know why the seq is 490,because I think it should be seq =1 ack=1)
#8 Client --> Server  [FIN,PSH,ACK] seq=1 ack=1 len=488
#9 Server --> Client  [ACK] seq=1 ack=490

Any ideas as to why this could be happening?

what will happen if the client receives syn ack retransmission when it is in fin-wait-1 Hi, We are facing a peculiar iss