Problem with CopyToAnotherServer

Question

Hi,

I have tried to use this functionnality between two servers (those servers have TLS both and I use proxy sock 5 to connect).

When i call the method, I have this error :

2011-07-18 14:21:10.751 ERROR Ftp(2) Info: Rebex.Net.TlsException: Fatal error 'ProtocolVersion' has been encountered on the local connection end. ---> Rebex.Net.TlsException: Fatal error 'ProtocolVersion' has been encountered on the local connection end.
   at wWGvS.ckSCApZ.AePCoRZ()
   at wWGvS.ckSCApZ.cDtmAOZ()
   --- End of inner exception stack trace ---
   at wWGvS.ckSCApZ.cDtmAOZ()
   at Rebex.Net.TlsSocket.Poll(Int32 microSeconds, SocketSelectMode mode)
   at wWGvS.AgXIfM.NYQdX(Int32 )
   at wWGvS.AgXIfM.BMJzdYZ(Byte[] , Int32 )
   at wWGvS.AgXIfM.BbLKfs(String& , Int32 )
   at wWGvS.AgXIfM.KsZclZ(Int32 )
   at wWGvS.AgXIfM.KsZclZ()
   at Rebex.Net.Ftp.cLttUyZ(String , String , Ftp , Ftp )
   at Rebex.Net.Ftp.CopyToAnotherServer(Ftp destinationServer, String sourcePath, String destinationPath)

Can you help please ?

Thanks in advance

Answer 1

This exception is thrown by the TLS/SSL packet parser when the 'protocol version' field of the packet contains a different version than the one negotiated. In practice, the this usually indicates that the received data might not have been a TLS/SSL packet at all - we have seen some FTP servers that have a habit of 'forgetting' that TLS/SSL was in use when sending certain error messages.

To make it possible to tell what might be going on, please try this code:

        try
        {
            ftp.CopyToAnotherServer(...);
        }
        catch (error as TlsException)
        {
            string data = error.GetData(null);
            // what's the content of 'data' string?
        }

And let us know the content of 'data' string.

Answer 2

I have added the line and error.getData(nothing) returns to me : ?n

Answer 3

You were right, it's my fault! I forgot to put 'SecureTransfers' property to 'True' for the servers. It works now.

Thanks

Comments

Thanks for letting us know! It looks like your FTP server doesn't allow non-secured server-to-server transfers, but behaves in a strange way when you attempt that. A normal behavior would be to report an error, which would then be received by Rebex FTP/SSL and reported via an FtpException. But I'm glad to know you solved that anyway!