I don't think the filter will work with your timestamp as it is not expecting the epoch time after the hh:mm:ss time. You could try changing
failregex = ^%(__prefix_line)s(?:\d+ |\d{6} \s?\d{1,2}:\d{2}:\d{2} )?\[Warning\] Access denied for user '\w+'@'<HOST>' (to database '[^']*'|\(using password: (YES|NO)\))*\s*$
to
failregex = ^%(__prefix_line)s(?:\d+ |\d{6} \s?\d{1,2}:\d{2}:\d{2} \d* )?\[Warning\] Access denied for user '\w+'@'<HOST>' (to database '[^']*'|\(using password: (YES|NO)\))*\s*$
Even then I am not sure about the ^%(__prefix_line)s(?: bit without looking at that part of the regex.

Nick

On 29/12/2015 18:14, Bill Shirley wrote:
Have you run?:
fail2ban-regex /var/log/mysql.warn /etc/fail2ban/filter.d/mysqld-auth.conf

Bill

On 12/29/2015 10:38 AM, Michiel Hazelhof wrote:
Hi All,

I am running the current default mysqld-auth filter
(https://github.com/fail2ban/fail2ban/blob/master/config/filter.d/mysqld-auth.conf),
and for some reason it is banning ip adresses that do not occur in the
log file and fails to ban ip's that do occur.

Jail.conf:
[mysqld-iptables]
enabled   = true
banaction = iptables-allports
port      = 1:65535
filter    = mysqld-auth
logpath   = /var/log/mysql.warn
bantime   = 604800
findtime  = 86400
maxretry  = 5

mysql.warn (not banned, 148 attempts):
2015-12-29  9:58:48 140359785273088 [Warning] Access denied for user
'root'@'216.99.157.170' (using password: YES)

fail2ban.log (banned, but does not occur in mysql.warn):
2015-12-29 16:32:31,127 fail2ban.actions        [8772]: NOTICE
[mysqld-iptables] Ban 155.94.224.210

Could anybody help me figure out what is going wrong?

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