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550 Security server forbids STOR before PORT/PASV !??

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  • 550 Security server forbids STOR before PORT/PASV !??

    I have a problem with checkpoint firewall-1 (FTP) by upload and download.

    Authentication - OK.
    ...
    TCP PRINT hSocket, "TYPE I" <-- Ok
    ...
    TCP PRINT hSocket, "PASV" <-- Ok
    ...
    TCP OPEN PORT ... AT ... AS hSocket <-- open data port on Firewall, Ok
    ...
    TCP PRINT hSocket, "STOR " + remoteFile <-- Firewall blocked this command with
    550 Security server forbids STOR before PORT/PASV.


    I have no problem with ftp-proxy servers. Data communication (upload/download) works fine.

    Is this false command sequence for checkpoint firewall-1? :shhh:
    Where is mistake in this procedure?

    Thanks
    Last edited by Alexander Holzer; 21 Mar 2009, 02:00 PM.
    Yours sincerely

  • #2
    The problem is solved!
    WSAStartUp() - WSACleanUp

    TCP OPEN ... opening of TCP port/services does not provide synchronous process of performance of procedures. ..from personal experience
    Yours sincerely

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