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I need your help~ -> [SYN] seq=0 -> [SYN] seq=0 >>> Retransmission -> [SYN/ACK] seq=0 ack=1 >>> Nomal tcp 3 hand shake syn/ack -> [SYN/ACK] seq=1 ack=1 <<<< what's this? -> [ACK] -> [RST/ACK] seq=1 ack=1 -> [RST] seq=1

All packet has same tcp port number
Have you ever seen syn/ack packet has seq=1 ?

asked 03 Feb '15, 23:04

Ju%20Hoon%20Cha's gravatar image

Ju Hoon Cha
accept rate: 0%

edited 04 Feb '15, 16:18

Guy%20Harris's gravatar image

Guy Harris ♦♦

Looks broken, but can't say for sure with relative sequence numbers. Things like this need to be diagnosed with absolute sequence numbers, no exceptions. You can disable relative sequence numbers in the TCP protocol preferences.

My guess is that is doing something wrong, which would also explain the RST packets.

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answered 04 Feb '15, 00:37

Jasper's gravatar image

Jasper ♦♦
accept rate: 18%

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question asked: 03 Feb '15, 23:04

question was seen: 3,849 times

last updated: 04 Feb '15, 16:18

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