PureFTP: Authentication Failed for all new and existing users

Hi, First I just want to say that I went to check all these questions but did not find solutions to my problem:
https://www.howtoforge.com/community/threads/pureftpd-on-ispconfig-3-wont-connect.39372/
https://www.howtoforge.com/community/threads/ftp-login-authentication-failed.77287/
https://www.howtoforge.com/communit...rver-has-closed-connection.39697/#post-205926

Problem:
All new and existing FTP users cannot login.

Gets this error:
Status: Connecting to 209.208.146.203:21...
Status: Connection established, waiting for welcome message...
Response: 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
Response: 220-You are user number 1 of 50 allowed.
Response: 220-Local time is now 04:23. Server port: 21.
Response: 220-This is a private system - No anonymous login
Response: 220-IPv6 connections are also welcome on this server.
Response: 220 You will be disconnected after 15 minutes of inactivity.
Command: USER ernz
Response: 331 User ernz OK. Password required
Command: PASS ************
Response: 530 Login authentication failed
​

tail -n 100 /var/log/syslog output:

Jul 6 04:08:19 ap pure-ftpd: ([email protected]) [INFO] PAM_RHOST enabled. Getting the peer address
Jul 6 04:08:26 ap pure-ftpd: ([email protected]) [WARNING] Authentication failed for user [ernz]
Jul 6 04:08:26 ap pure-ftpd: ([email protected]) [INFO] Logout.
Jul 6 04:08:51 ap pure-ftpd: ([email protected]) [INFO] New connection from 122.3.53.166
Jul 6 04:08:52 ap pure-ftpd: ([email protected]) [DEBUG] Command [user] [ernz]
Jul 6 04:08:52 ap pure-ftpd: ([email protected]) [DEBUG] Command [pass] [<*>]
Jul 6 04:08:52 ap pure-ftpd: ([email protected]) [INFO] PAM_RHOST enabled. Getting the peer address
Jul 6 04:08:59 ap pure-ftpd: ([email protected]) [WARNING] Authentication failed for user [ernz]
Jul 6 04:08:59 ap pure-ftpd: ([email protected]) [INFO] Logout.
​

iptables -L output

Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination​

Solutions I have tried:

• uninstalled and then installed PureFTP
• update ISPConfig and reconfigured services
• Also tried to login using the MySQL username and PW at /etc/pure-ftpd/db/mysql.conf. Can access the ispconfig DB and ftp_user table

Please help.
Thank you,

 

Hi Till..
I did not use the FTP prefix. My FTP user prefix is blank.
And the FTP user list states the same usernames, no prefix.

I have installed pure-ftpd-mysql.
Here is part of the /etc/pure-ftpd/db/mysql.conf

Code:

##############################################
#                                            #
# Sample Pure-FTPd Mysql configuration file. #
# See README.MySQL for explanations.         #
#                                            #
##############################################


# Optional : MySQL server name or IP. Don't define this for unix sockets.

MYSQLServer    localhost

# Optional : MySQL port. Don't define this if a local unix socket is used.

MYSQLPort       3306

# Optional : define the location of mysql.sock if the server runs on this host.
# MYSQLSocket      /var/run/mysqld/mysqld.sock
# Mandatory : user to bind the server as.

MYSQLUser       ispconfig

# Mandatory : user password. You must have a password.

MYSQLPassword   <password>

# Mandatory : database to open.

MYSQLDatabase   dbispconfig

# Mandatory : how passwords are stored
# Valid values are : "cleartext", "crypt", "md5" and "password"
# ("password" = MySQL password() function)
# You can also use "any" to try "crypt", "md5" *and* "password"

MYSQLCrypt      crypt