I'd like to ask sth about ports

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  • am5a03
    New Member
    • Mar 2008
    • 1

    I'd like to ask sth about ports

    Hello, everyone. I'm a networking n00b from HK :P

    I'd like to ask what's those ports means?
    LISTENING
    TIME_WAIT
    ESTABLISHED
    CLOSE_WAIT


    I hope you can help me.
  • Arulmurugan
    New Member
    • Jan 2008
    • 90

    #2
    Originally posted by am5a03
    Hello, everyone. I'm a networking n00b from HK :P

    I'd like to ask what's those ports means?
    LISTENING
    TIME_WAIT
    ESTABLISHED
    CLOSE_WAIT


    I hope you can help me.
    I don't see any port from you attachment, but any have LISTENING, TIME_WAIT, ESTABLISHED and CLOSE_WAIT are diiferent states in TCP.

    LISTEN - represents waiting for a connection request from any remote
    TCP and port.

    SYN-SENT - represents waiting for a matching connection request
    after having sent a connection request.

    SYN-RECEIVED - represents waiting for a confirming connection
    request acknowledgment after having both received and sent a
    connection request.

    ESTABLISHED - represents an open connection, data received can be
    delivered to the user. The normal state for the data transfer phase
    of the connection.

    FIN-WAIT-1 - represents waiting for a connection termination request
    from the remote TCP, or an acknowledgment of the connection
    termination request previously sent.

    FIN-WAIT-2 - represents waiting for a connection termination request
    from the remote TCP.

    CLOSE-WAIT - represents waiting for a connection termination request
    from the local user.

    CLOSING - represents waiting for a connection termination request
    acknowledgment from the remote TCP.

    LAST-ACK - represents waiting for an acknowledgment of the
    connection termination request previously sent to the remote TCP
    (which includes an acknowledgment of its connection termination
    request).
    TIME-WAIT - represents waiting for enough time to pass to be sure
    the remote TCP received the acknowledgment of its connection
    termination request.

    CLOSED - represents no connection state at all.

    For more info at at the TCP's RFC.
    Regards,
    Arul

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