Causes of the “Response 150” error message

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I always get the error: Response 150 everytime I try logging into an FTPS server, what is causing this and how can I avoid this?

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Answered By 0 points N/A #116082

Causes of the “Response 150” error message

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The error code 150 on an FTPS means that the file status is okay and that the server is about to open data connection. It actually uses two ports:

  • 21 for sending commands
  • 20 for sending data

Status code 150 indicates that the server was about to open a new connection on port 20 to send some data but it cannot do so because:

  • Your client may be behind a firewall and is trying to use an Active-mode FTP
  • Your server could be behind a firewall and is trying to use a Passive-mode FTP

To have this resolve:

  • Open the Windows Firewall
  • Click on Allow a program or feature through Windows Firewall
  • Under the Allowed programs and features list check the File Transfer Program
  • Open command prompt and type ftp x.x.x.x
  • Login then ls/dir/get/put

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