Fix the “534 Protection level negotiation failed.” error in lftp

If you are using lftp to connect to a secure FTP (SFTP) server using SSL, you may sometimes get the following error during file transfers:

534 Protection level negotiation failed.

In this case, you need to add the following line to the bottom of your /etc/lftp.conf file

set ftp:ssl-protect-data yes

Now try connecting again and hopefully everything should work ok – it sorted my problems when I was trying to connect to the Leeds University SFTP servers using lftp on Ubuntu 9.10 (Karmic).

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This entry was posted on Friday, January 15th, 2010 at 11:40 pm and is filed under Linux. You can follow any comments to this entry through the RSS 2.0 feed. You can leave a comment, or trackback from your own site.

2 comments

  1. Pablo
    July 6, 2010 at 6:34 pm

    Thanks a lot… it really help me.

    Reply
  2. 4uvak
    July 28, 2010 at 12:08 pm

    Helped me too, thanks.

    Reply

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