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Daemon to ban hosts that cause multiple authentication errors

tag: 0.8.5

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Fail2Ban (version 0.8.5)                                              2011/07/26

Fail2Ban scans log files like /var/log/pwdfail and bans IP that makes too many
password failures. It updates firewall rules to reject the IP address. These
rules can be defined by the user. Fail2Ban can read multiple log files such as
sshd or Apache web server ones.

This README is a quick introduction to Fail2ban. More documentation, FAQ, HOWTOs
are available on the project website:


   >=python-2.3 (

   >=gamin-0.0.21 (

To install, just do:

> tar xvfj fail2ban-0.8.4.tar.bz2
> cd fail2ban-0.8.4
> python install

This will install Fail2Ban into /usr/share/fail2ban. The executable scripts are
placed into /usr/bin.

It is possible that Fail2ban is already packaged for your distribution. In this
case, you should use it.

Fail2Ban should be correctly installed now. Just type:

> fail2ban-client -h

to see if everything is alright. You should always use fail2ban-client and never
call fail2ban-server directly.


You can configure Fail2ban using the files in /etc/fail2ban. It is possible to
configure the server using commands sent to it by fail2ban-client. The available
commands are described in the man page of fail2ban-client. Please refer to it or
to the website:


You need some new features, you found bugs or you just appreciate this program,
you can contact me at:


Cyril Jaquier: <>


Kévin Drapel, Marvin Rouge, Sireyessire, Robert Edeker, Tom Pike, Iain Lea,
Andrey G. Grozin, Yaroslav Halchenko, Jonathan Kamens, Stephen Gildea, Markus
Hoffmann, Mark Edgington, Patrick Börjesson, kojiro, zugeschmiert, Tyler, Nick
Munger, Christoph Haas, Justin Shore, Joël Bertrand, René Berber, mEDI, Axel
Thimm, Eric Gerbier, Christian Rauch, Michael C. Haller, Jonathan Underwood,
Hanno 'Rince' Wagner, Daniel B. Cid, David Nutter, Raphaël Marichez, Guillaume
Delvit, Vaclav Misek, Adrien Clerc, Michael Hanselmann, Vincent Deffontaines,
Bill Heaton, Russell Odom, Christos Psonis, Arturo 'Buanzo' Busleiman and many


Fail2Ban is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later

Fail2Ban is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
Fail2Ban; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
Suite 330, Boston, MA  02111-1307  USA
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