How to install an FTP client on a Synology NAS

Written by Ingmar Verheij on April 22nd, 2012. Posted in Synology

A Synology NAS can be used as a FTP server out-of-the-box (after enabling it), but there is no FTP client installed that can be used from a interactive shell. You can install a FTP client, lftp by Alexander Lukyanov, using ipkg.

If you haven’t installed ipkg yet, please install it first (link).

Install package lftp

You can install the package lftp in with the command: ipkg install lftp



Disable certificate verification

By default lftp will check the ssl certificate of the destination. If no trusted certificate is found the command is not executed.

$ lftp [email protected]:/directory
cd: Fatal error: Certificate verification: Not trusted

You can disable the certificate verification in lftp by setting an option in the ~/.lftp/rc file. This file does not exist by default, nor does the .lftp directory.

  1. Create the .lftp directory with the command : mkdir /root/.lftp
  2. Create and edit the rc file with the command : vi /root/.lftp/rc
  3. Press ‘i’ for edit mode
  4. Add the line : set ssl:verify-certificate no
  5. Exit edit mode by pressing Escape (twice)
  6. Close and save the file by pressing Z (capital z) twice)

Ingmar Verheij

At the time Ingmar wrote this article he worked for PepperByte as a Senior Consultant (up to May 2014). His work consisted of designing, migrating and troubleshooting Microsoft and Citrix infrastructures. He was working with technologies like Microsoft RDS, user environment management and (performance) monitoring. Ingmar is User Group leader of the Dutch Citrix User Group (DuCUG). RES Software named Ingmar RES Software Valued Professional in 2014.

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Comments (6)

  • Luc Lecocq
    30 January 2013 at 17:18 |


    Thanks for the information, installation went fine.
    Unfortunately, it seems lftp randomly restart the transfer from scratch.
    I used it to xfer 6 big files to my media server, at the end it left 4 temporary files in the destination folder.
    Overall, samba is more reliable, at least in my case

    • Ingmar Verheij
      31 January 2013 at 16:16 |

      Hi Luc,

      Thank you for sharing your experience. It’s good to share real life experience with lftp.
      Personally I haven’t had any problems with lftp but tested only with small files.


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