Hello,
after testing with different working and not working configs of proftpd we
think we found a workaround.
The login is working with the following config:
<IfModule mod_sftp.c>
<VirtualHost X.X.X.X>
SFTPEngine on
SFTPPAMEngine off
SFTPLog /var/log/proftpd/sftp.log
Port 115
SFTPHostKey /etc/ssh/ssh_host_rsa_key
SFTPHostKey /etc/ssh/ssh_host_dsa_key
SFTPAuthorizedUserKeys file:~/.sftp/authorized_keys
SFTPCompression delayed
MaxLoginAttempts 6
SFTPClientAlive 3 15
DefaultRoot ~
ListOptions -la
AuthUserFile /etc/proftpd/proftpd.passwd
RequireValidShell off
</VirtualHost>
</IfModule>
Now if you remove the part "SFTPPAMEngine off" the login doesn't work anymore.
We tried it several times and the login doesn't work if the SFTPPAMEngine is
active.
If you login via Shell and you have to enter a password, you can see the
difference in the password request.
Normally it is displayed like that:
$ sftp -P 115 <Username>@172.31.XXX.XXX
> user@server password:
If the SFTPPAMEngine is active only the "password:" part is displayed, so the
user@server part is lost.
Kind regards,
Timo.
