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Hi I have problem figuring out what's happening during clinet server communication. After three way handshake client sends a data packet which server ACKnowledge. Immediately after that client sends (FIN, ...
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  1. #1
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    Client sending RST packet


    Hi

    I have problem figuring out what's happening during clinet server communication.

    After three way handshake client sends a data packet which server ACKnowledge. Immediately after that client sends (FIN, ACK) packet which is acknowledged by server. Then server sends a data packet and immediately after that client sends RST packet

    Can somebody help me on this.

  2. #2
    Linux Guru Lazydog's Avatar
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    Not enough information.

    What is the client trying to do?

    What program is being used?

    Regards
    Robert

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  3. #3
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    Thanks for responding. Actually program in this case is a printer driver and sever is a printer. so I am running driver on the client and printer is connected over LAN. Driver needs some data from the printer which is trying to fetch from printer. but unable to do so. This happens in linux only. On window it can read data. On window communication happnes in this way.

    After three way handshake client sends a data packet which printer acknowledges. then after that printer sends a data packet. but in linux this is not happening instead client is sending FIN, ACK packet.

    I hope things are clear now.

  4. #4
    Linux Guru Lazydog's Avatar
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    Have you packet captured this session?

    Regards
    Robert

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  5. #5
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    Quote Originally Posted by Lazydog View Post
    Have you packet captured this session?
    yes I have here is the linux flow
    Attached Images Attached Images

  6. #6
    Linux Guru Lazydog's Avatar
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    Yeah, I cannot read this it is too small.

    Regards
    Robert

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