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I have got a machine (ubuntu 20.04.2) with root access and root authentication is done strictly with pem file. There is need to setup vsftpd & ftp user which has been done. But ftp user cannot login to machine apparently because PasswordAuthentication is set to NO in SSH config file.

filezilla error: no supported authentication methods

Is there a way to maintain status quo for root authentication using PEM file only and still have ftp user strictly authenticated using password?

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You need to specify the following two options in your sshd config file:

PasswordAuthentication yes

This allows the use of passwords for your FTP user (and all other users).

PermitRootLogin prohibit-password

This explicitly allows root to only login via ssh using a keyfile, and prevents logging in as root with password.

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  • Thanks a bunch! Very helpful...
    – John
    Jun 30, 2021 at 12:00

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