PassiveUseHostAddr

Some FTP servers need this option for passive data transfers. In passive mode, the data connection is initiated by the client sending a PASV command to the FTP server, and the FTP server responds with the IP address and port number where it is listening for the client's connection request. When the PassiveUseHostAddr property is set, the IP address in the PASV response is discarded and the IP address of the remote endpoint of the existing control connection is used instead.

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uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATFTP2Lib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
ftp: TChilkatFtp2;
success: Integer;
localFilename: String;
remoteFilename: String;

begin
ftp := TChilkatFtp2.Create(Self);

//  Any string unlocks the component for the 1st 30-days.
success := ftp.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    ShowMessage(ftp.LastErrorText);

  end;

ftp.Hostname := 'ftp.chilkatsoft.com';
ftp.Username := '*myLogin';
ftp.Password := '*myPassword';

//  Connect and login to the FTP server.
success := ftp.Connect();
if (success <> 1) then
  begin
    ShowMessage(ftp.LastErrorText);

  end;

//  Set the PassiveUseHostAddr property.
ftp.PassiveUseHostAddr := 1;

//  Change to the remote directory where the file will be uploaded.
success := ftp.ChangeRemoteDir('junk');
if (success <> 1) then
  begin
    ShowMessage(ftp.LastErrorText);

  end;

//  Upload a file.
localFilename := 'hamlet.xml';
remoteFilename := 'hamlet.xml';

success := ftp.PutFile(localFilename,remoteFilename);
if (success <> 1) then
  begin
    ShowMessage(ftp.LastErrorText);

  end;

ftp.Disconnect();

ShowMessage('File Uploaded!');
end;