Hi to all,

@Olaf Hopp I've this filter enabled for fail2ban, my question is: could my filters overlap or interfere with those suggested by you?

this is my filter:

Contents of /etc/fail2ban/jail.conf:

[postfix]

Ban for 10 minutes if it fails 6 times within 10 minutes

enabled = true port = smtp,ssmtp filter = postfix logpath = /var/log/mail.log maxretry = 6 bantime = 600 findtime = 600

Contents of /etc/fail2ban/filter.d/postfix.conf:

Fail2Ban configuration file

Author: Cyril Jaquier

$Revision$

[Definition]

Option: failregex

Notes.: regex to match the password failures messages in the

logfile. The

host must be matched by a group named "host". The tag

"<HOST>" can

be used for standard IP/hostname matching and is only an

alias for

(?:::f{4,6}:)?(?P<host>[\w\-.^_]+)

Values: TEXT

Jul 11 02:35:08 mail postfix/smtpd[16299]: lost connection after AUTH

from unknown[196.12.178.73]

failregex = lost connection after AUTH from unknown\[<HOST>\]

Option: ignoreregex

Notes.: regex to ignore. If this regex matches, the line is ignored.

Values: TEXT

ignoreregex =

Many thanks!