Re: different version of squirrelmail - different behavior when log-in with wrong username/password

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On 09/09/2015 02:50 AM, Miroslav Geisselreiter wrote:
> dovecot-1.0.7-9.el5_11.4, php-5.1.6-45.el5_11,
> httpd-2.2.3-91.el5.centos, fail2ban-0.8.14-1.el5, CentOS 5 with kernel
> 2.6.18-406.el5.
> When I try login to squirrelmail with bad user or bad password, I get
> message: Unknown user or password incorrect. squirrel-plugin write about
> that to logfile and fail2ban read that bad attempts and do its work (I
> want to use fail2ban for blocking attacks).
>
> New servers:
> CentOS 6: squirrelmail-1.4.22-4.el6.noarch, plugin
> squirrel_logger-2.3.1-1.2.7, sendmail-8.14.4-9.el6.x86_64,
> dovecot-2.0.9-19.el6.1.x86_64, php-5.3.3-46.el6_6.x86_64,

Miroslav,

   It looks like the primary difference is:

dovecot-1.0.7-9.el5_11.4
<snip>

New servers:
CentOS 6:
<snip>
dovecot-2.0.9-19.el6.1.x86_64

   If I understand that the problem you have is the difference in reporting a 
bad username between Centos 5 & 6, the most likely culprit is the difference in 
the way dovecot itself responds between versions 1 & 2.

   I don't have a dovecot 1 box to test, but I would check the dovecot 
documentation to see if that is the source of the reporting difference. fail2ban 
itself should be capable of working with either

-- 
David C. Rankin, J.D.,P.E.

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