On 07/29/2017 01:34 PM, Davide Marchi wrote:

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:

Davide, yours is all postfix and thus has got no overlap with dovecot. So no interference. Olaf

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!

-- Karlsruher Institut für Technologie (KIT) ATIS - Abt. Technische Infrastruktur, Fakultät für Informatik

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