failed to convert data

  • 08 Sep

    Failed to convert data connection to TLS

    Failed to convert data connection

    Q: What could be the reason of this?

    When trying to FTP, This is the error message –

    9/4/2024 3:36:11 PM FTPListDirectory, CK GetDirCount Error: ChilkatLog:
    GetDirCount:
    VerboseLogging: 0
    listPattern: *
    fetchDirListing:
    pattern: *
    supportsMLSD: 0
    fetchDirListing2:
    pbsz_protp:
    simpleCommand:
    sendCommand:
    sendingCommand: PBSZ 0
    –sendCommand
    readCommandResponse:
    replyLineQP: 200 OK.
    –readCommandResponse
    –simpleCommand
    simpleCommand:
    sendCommand:
    sendingCommand: PROT P
    –sendCommand
    readCommandResponse:
    replyLineQP: 200 Data connections set to secure (SSL) mode
    –readCommandResponse
    –simpleCommand
    –pbsz_protp
    setupDataConnection:
    passive transfer mode
    setupPassiveDataSocket:
    sendCommand:
    sendingCommand: PASV
    –sendCommand
    readCommandResponse:
    replyLineQP: 227 Entering Passive Mode (XXX,XXX,XXX,XXX,XXX,XXX)
    –readCommandResponse
    dataConnect:
    hostname: XXX.XXX.XXX.XXX
    port: 49434
    Setting SNI hostname for data connection.
    SNI_hostname: XXXXXXXX
    socketOptions:
    SO_SNDBUF: 262144
    SO_RCVBUF: 4194304
    TCP_NODELAY: 0
    SO_KEEPALIVE: 1
    –socketOptions
    dataConnectSuccess: 1
    –dataConnect
    –setupPassiveDataSocket
    –setupDataConnection
    sendCommand:
    sendingCommand: LIST
    –sendCommand
    readCommandResponse:
    replyLineQP: 125 Secure data connection open; transfer starting.
    –readCommandResponse
    convertDataConnToSsl:
    ConvertToTls: Elapsed time: 0 millisec
    Failed to convert data connection to TLS
    –convertDataConnToSsl
    Failed to convert data connection to TLS.
    –fetchDirListing2
    –fetchDirListing
    Failed to get and cache directory listing…
    N: -1
    Failed.
    –GetDirCount
    –ChilkatLog

    Could you please help in this?

    A: The error indicates that while the initial control connection to the FTP server was established successfully, the client failed to upgrade the data connection to a secure TLS (Transport Layer Security) connection.

    Possible causes:

    • Misconfiguration on the server or client side
    • Incompatible TLS versions between client and server
    • Firewall or network issues blocking the necessary ports
    • Outdated software that doesn’t support the required encryption methods

    Common scenarios:

    • The FTP client is set to use explicit FTPS, but the server doesn’t support it
    • The server requires implicit FTPS, but the client is not configured for it
    • There’s a mismatch in the supported TLS versions between client and server

    To resolve this issue, you could try the following:

    1. Check your FTP client settings to ensure you’re using the correct encryption method (implicit or explicit FTPS).
    2. Verify with your FTP server administrator that FTPS is supported and properly configured.
    3. Try using a different FTP client to rule out client-specific issues.
    4. Ensure your firewall isn’t blocking the necessary ports for FTPS (usually port 990 for implicit FTPS).
    5. Update your FTP client and server software to the latest versions.

    The The reason here was a mismatch in the supported TLS versions between client and server. Somehow the server has an issue with TLS and the only way to transfer the data was to disable our ‘Encrypt Data Channel” option.

    C:\Data\Foto\v2023\FTP\Failed to convert data connection\Failed to convert data connection

    The customer was using Implicit FTPS on port 990

    limagito file mover ftps setup

    If you need any help with this question, please let us know.

    Best Regards,

    Limagito Team

    #ftp #managedfiletransfer #filetransfer #filemanagement

    By Limagito-Team FTP ,
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