> On Apr 9, 2019, at 9:03 AM, Mauricio Tavares via dovecot
> <dovecot@dovecot.org> wrote:
>
> In
> https://urldefense.proofpoint.com/v2/url?u=https-3A__wiki.dovecot.org_HowTo_Fail2Ban&d=DwIBaQ&c=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM&r=X0jL9y0sL4r4iU_qVtR3lLNo4tOL1ry_m7-psV3GejY&m=pvPczF9hPXSNtmAKNFK4BCXvgxuaUKHd2Ur3lh4S7qQ&s=_kg3Hgc3N8Dk4K_fGw94IDAeC1tvlMTQ9w3Ocfzm3Ts&e=,
> for a current (I know for
> a fact in 2.2.36) I believe it should be
>
> filter = dovecot
>
> instead of
>
> filter = dovecot-pop3imap
>
> [root@mail ~]# ls -l /etc/fail2ban/filter.d/doveco*
>
> -rw-r--r-- 1 root root 1875 May 11 2017 /etc/fail2ban/filter.d/dovecot.conf
I believe that’s a different jail:
diff /etc/fail2ban/filter.d/dovecot-pop3imap.conf
/etc/fail2ban/filter.d/dovecot.conf
0a1,7
> # Fail2Ban filter Dovecot authentication and pop3/imap server
> #
>
> [INCLUDES]
>
> before = common.conf
>
2,3c9,47
< failregex = (?: pop3-login|imap-login): .*(?:Authentication failure|Aborted
login \(auth failed|Aborted login \(tried to use disabled|Disconnected \(auth
failed|Aborted login \(\d+ authentication attempts).*rip=`<HOST>`
< ignoreregex =
---
>
> _auth_worker = (?:dovecot: )?auth(?:-worker)?
> _daemon = (?:dovecot(?:-auth)?|auth)
>
> prefregex = ^%(__prefix_line)s(?:%(_auth_worker)s(?:\([^\)]+\))?:
> )?(?:%(__pam_auth)s(?:\(dovecot:auth\))?: |(?:pop3|imap)-login: )?(?:Info:
> )?<F-CONTENT>.+</F-CONTENT>$
>
> failregex = ^authentication failure; logname=<F-ALT_USER1>\S*</F-ALT_USER1>
> uid=\S* euid=\S* tty=dovecot ruser=<F-USER>\S*</F-USER>
> rhost=<HOST>(?:\s+user=<F-ALT_USER>\S*</F-ALT_USER>)?\s*$
> ^(?:Aborted login|Disconnected)(?::(?: [^ \(]+)+)? \((?:auth
> failed, \d+ attempts(?: in \d+ secs)?|tried to use (?:disabled|disallowed)
> \S+ auth|proxy dest auth failed)\):(?: user=<<F-USER>[^>]*</F-USER>>,)?(?:
> method=\S+,)? rip=<HOST>(?:[^>]*(?:, session=<\S+>)?)\s*$
> ^pam\(\S+,<HOST>(?:,\S*)?\): pam_authenticate\(\) failed: (?:User
> not known to the underlying authentication module: \d+
> Time\(s\)|Authentication failure \(password mismatch\?\)|Permission
> denied)\s*$
> ^[a-z\-]{3,15}\(\S*,<HOST>(?:,\S*)?\): (?:unknown user|invalid
> credentials|Password mismatch)\s*$
> <mdre-<mode>>
>
> mdre-aggressive = ^(?:Aborted login|Disconnected)(?::(?: [^ \(]+)+)? \((?:no
> auth attempts|disconnected before auth was ready,|client didn't finish \S+
> auth,)(?: (?:in|waited) \d+ secs)?\):(?: user=<[^>]*>,)?(?: method=\S+,)?
> rip=<HOST>(?:[^>]*(?:, session=<\S+>)?)\s*$
>
> mdre-normal =
>
> # Parameter `mode` - `normal` or `aggressive`.
> # Aggressive mode can be used to match log-entries like:
> # 'no auth attempts', 'disconnected before auth was ready', 'client didn't
> finish SASL auth'.
> # Note it may produce lots of false positives on misconfigured MTAs.
> # Ex.:
> # filter = dovecot[mode=aggressive]
> mode = normal
>
> ignoreregex =
>
> journalmatch = _SYSTEMD_UNIT=dovecot.service
>
> datepattern = {^LN-BEG}TAI64N
> {^LN-BEG}
>
> # DEV Notes:
> # * the first regex is essentially a copy of pam-generic.conf
> # * Probably doesn't do dovecot sql/ldap backends properly (resolved in edit
> 21/03/2016)
> #
> # Author: Martin Waschbuesch
> # Daniel Black (rewrote with begin and end anchors)
> # Martin O'Neal (added LDAP authentication failure regex)
> # Sergey G. Brester aka sebres (reviewed, optimized,
> IPv6-compatibility)
