On Sun, 2021-10-17 at 16:54 -0400, Krzysztof Adamski wrote:
> On Sun, 2021-10-17 at 22:22 +0200, Tim Boneko via Fail2ban-users
> wrote:
> > Am Sonntag, dem 17.10.2021 um 13:33 -0400 schrieb Krzysztof
> > Adamski:
> > > 
> > > ... dovecot: imap-login: Disconnected (auth failed, 4 attempts in
> > > 53
> > > secs): user=<finance@ ...
> > > 
> > > What I was thinking is that "4 attempts" should be counted as 4
> > > instead of as 1.
> > 
> > Hello Krzysztof!
> > I suggest a different solution: Configure logging of dovecot.
> > /etc/dovecot/10-logging.conf has lots of settings to try. 1 line of
> > log for 4 failed attempts is a little sparse, methinks!
> > Cheers,
> >     tim
> 
> That is a very good idea, so I enabled more logging in dovecot, and
> now
> I get this:
> 
> Oct 17 16:33:34 mailserver dovecot: auth-worker(41189): conn
> unix:auth-
> worker (pid=41188,uid=108): auth-worker<119>:
> sql(orders,219.145.118.23,<tABXVZLOhpnbkXYX>): unknown user (given
> password: qwer1234)
> 
> After looking at the regex in the dovecot.conf in the filter.d
> directory, I realize that my knowledge of regex is not up to the
> task.
> 
> I'm glad that somebody has already crafted the regex and now I'm
> banning more IPs.
> 
> 
> Thank you,
> K
> 

I was wrong, the auth-worker failures are not being used in the ban. Is
there anything I can change to enable the ban on this?



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