Windows Vista Forums

Tcp: responding to a server's acknowledgment

  1. #1


    deostroll Guest

    Tcp: responding to a server's acknowledgment

    Hi,

    I am not that experienced with tcp programming. Lately I am trying to
    understand how I can respond to server acknowledgements. I guess they come
    into picture only if you send some IAC DO instructions to the server. I am
    not sure though. I have posted a full account of my problem over @ msdn
    forums. Not got a response so far. Below is the link to it:
    http://social.msdn.microsoft.com/For...8-53df02228eae

    Hoping I can find some advice. Thanx in advance.

    --deostroll

      My System SpecsSystem Spec

  2. #2


    Goran Sliskovic Guest

    Re: responding to a server's acknowledgment


    "deostroll" <deostroll@newsgroup> wrote in message
    news:0FC80D24-DC75-4E8A-9476-891FA26E5B74@newsgroup

    > Hi,
    >
    > I am not that experienced with tcp programming. Lately I am trying to
    > understand how I can respond to server acknowledgements. I guess they come
    > into picture only if you send some IAC DO instructions to the server. I am
    > not sure though. I have posted a full account of my problem over @ msdn
    > forums. Not got a response so far. Below is the link to it:
    > http://social.msdn.microsoft.com/For...8-53df02228eae
    >
    > Hoping I can find some advice. Thanx in advance.
    >
    > --deostroll
    The acknowledgment you are talking about is internal to TCP protocol. It's
    not passed to an application and the application does not need to respond to
    it (it can't). OS will handle that. Your problem is somwhere in the
    implementation of telnet protocol.

    Regards,
    Goran


      My System SpecsSystem Spec

  3. #3


    deostroll Guest

    Re: responding to a server's acknowledgment

    > Your problem is somwhere in the

    > implementation of telnet protocol.
    > Goran
    So how do I implement it? I hope u see there is a challenge here. I
    don't exactly understand what I have to send to the remote machine via
    telnet. I have to keep discovering that using the wireshark tool...

    --deostroll

      My System SpecsSystem Spec

  4. #4


    Goran Sliskovic Guest

    Re: responding to a server's acknowledgment


    "deostroll" <deostroll@newsgroup> wrote in message
    news:0012f052-5e15-47b6-a736-f0dbdd90787b@newsgroup

    >> Your problem is somwhere in the
    >> implementation of telnet protocol.
    >> Goran
    >
    > So how do I implement it? I hope u see there is a challenge here. I
    > don't exactly understand what I have to send to the remote machine via
    > telnet. I have to keep discovering that using the wireshark tool...
    >
    > --deostroll
    Telnet protocol is specified in:
    http://www.faqs.org/rfcs/rfc854.html

    There are probably lot resources on the internet about telnet protocol.
    Reverse engineering using wireshark is a bit tricky and unnecessary IMHO.

    Regards,
    Goran


      My System SpecsSystem Spec

  5. #5


    deostroll Guest

    Re: responding to a server's acknowledgment

    > Telnet protocol is specified in:http://www.faqs.org/rfcs/rfc854.html

    > Goran
    I still can't develop a NVT just by reading that...are there any texts/
    books which explain how to go about implementing it...?

    --deostroll

      My System SpecsSystem Spec

  6. #6


    Goran Sliskovic Guest

    Re: responding to a server's acknowledgment


    "deostroll" <deostroll@newsgroup> wrote in message
    news:08d31853-51f2-4067-99a7-5df6cc340f72@newsgroup

    >> Telnet protocol is specified in:http://www.faqs.org/rfcs/rfc854.html
    >> Goran
    >
    > I still can't develop a NVT just by reading that...are there any texts/
    > books which explain how to go about implementing it...?
    >
    > --deostroll
    Shouldn't be so difficult, you probably could implement only few options and
    refuse most... Anyway, there are lot of free telnet clients with source code
    available on the internet:

    http://www.google.hr/search?q=telnet+client+source

    Regards,
    Goran


      My System SpecsSystem Spec

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