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Unable to connect to the Plesk server via SFTP: Received unexpected end-of-file from SFTP server

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Mikhail Shport
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Plesk for Linux kb: technical

Applicable to:

  • Plesk for Linux

Symptoms

Unable to connect to SFTP. The following error is shown in an FTP client:

CONFIG_TEXT: Received unexpected end-of-file from SFTP server

Cause

Incorrect value of the Subsystem parameter in the SSH configuration:

# grep Subsystem /etc/ssh/sshd_config
Subsystem sftp /usr/libexec/openssh/sftp-server

Resolution

  1. Connect to the server via SSH

  2. Replace the necessary value:

    # for i in $(grep Subsystem /etc/ssh/sshd_config | awk '{print $3}'); do sed -i 's|'"$i"'|internal-sftp|g' /etc/ssh/sshd_config; done

  3. Reload the SSHD service:

    # service sshd reload

Comments

3 comments

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  • Avatar
    Haïtham Diaz

    Worked like a charm ! Thank you

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  • Avatar
    TJ Rutkowski (Edited )

    I get an error on step 2 when I try this.  

    -bash: syntax error near unexpected token `do'

    So, I 

    sudo nano /etc/ssh/sshd_config

    and commented out the following line

    Subsystem   sftp    /usr/libexec/sftp-server

    then added

    Subsystem sftp internal-sftp

    And restarted the service. SFTP is working for Plesk users.

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  • Avatar
    Stef Graf (Edited )

    In my case, changing it to internal-sftp worked but broke the CHROOT configuration.

    The correct answer was to leave the Subsystem with the original value and instead rebuild the chroot template as described in this article https://support.plesk.com/hc/en-us/articles/115002140654

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