Daemon to ban hosts that cause multiple authentication errors http://www.fail2ban.org/
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
sebres 579c6a94af filter.d/postfix.conf: mode `ddos` (and `aggressive`) extended to consider abusive handling of clients hitting command limit (gh-3040) 4 days ago
.github Merge branch '0.11' 2 months ago
bin DOC: minor typos spotted around comments etc 3 years ago
config filter.d/postfix.conf: mode `ddos` (and `aggressive`) extended to consider abusive handling of clients hitting command limit (gh-3040) 4 days ago
doc - performance of fail2ban optimized 6 years ago
fail2ban filter.d/postfix.conf: mode `ddos` (and `aggressive`) extended to consider abusive handling of clients hitting command limit (gh-3040) 4 days ago
files fail2ban.service systemd unit template: don't add user site directory to python system path (avoids accessing of `/root/.local` directory, prevents SE linux audit warning at daemon startup, gh-2688) 1 year ago
man docs: Typo. (#3025) 1 month ago
.coveragerc coverage 3 years ago
.gitignore Add .idea dir to .gitignore 7 years ago
.mailmap ENH: .mailmap file to bring some names together for git shortlog -sn 6 years ago
.project - Added Eclipse project file 15 years ago
.pylintrc ENH: added a .pylintrc to help with consistent appearance and catch obvious problems 10 years ago
.travis.yml fix travis build (unsupported pythons and pypy versions), update 3.10 in GH actions 2 months ago
CONTRIBUTING.md Added to CONTRIBUTING.md minimal guidelines for PRs 6 years ago
COPYING - Added ISO 8601 date/time format. 13 years ago
ChangeLog Update ChangeLog 1 month ago
DEVELOP Update information reg. ipdns.py as successor for dnsutils.py 3 years ago
FILTERS Add blank line so markdown renders correctly 5 months ago
MANIFEST Merge pull request #2565 from caronc/0.11 2 months ago
MANIFEST.in Add ignorecommands to MANIFEST*'s 6 years ago
README.Solaris DOC: minor changes just to trigger the build 7 years ago
README.md readme: amend to bump version (v.1.0.1 is master now) 1 year ago
RELEASE Merge branch '0.9-fix-regex-using-journal' into 0.10-fix-regex-using-journal (merge point against 0.9 after back-porting gh-1660 from 0.10) 4 years ago
THANKS Merge pull request #1460 from sebres/0.10-full 4 years ago
TODO DOC: deadlock resolved with locking introduced in 3a58d0e and d07df66 now uses subprocess.Popen. 7 years ago
Vagrantfile Vagrant with two Ubuntu Trusty64 boxes 7 years ago
fail2ban-2to3 TST: Fix up fail2ban python3 scripts 8 years ago
fail2ban-testcases-all ENH+TST: Move fail2ban-* scripts to bin/ 8 years ago
fail2ban-testcases-all-python3 TST: Fix up fail2ban python3 scripts 8 years ago
kill-server - Initial commit of the new development release 0.7 15 years ago
setup.cfg Merge branch 'master' into 0.9 8 years ago
setup.py setup.py: small amend to d2d3762ba9fa82b7983bae74cd567702e5c1b96c: allow build without tests also (both build and install accepting `--without-tests` option now) 7 months ago


                     __      _ _ ___ _               
                    / _|__ _(_) |_  ) |__  __ _ _ _  
                   |  _/ _` | | |/ /| '_ \/ _` | ' \ 
                   |_| \__,_|_|_/___|_.__/\__,_|_||_|
                   v1.0.1.dev1            20??/??/??

Fail2Ban: ban hosts that cause multiple authentication errors

Fail2Ban scans log files like /var/log/auth.log and bans IP addresses conducting too many failed login attempts. It does this by updating system firewall rules to reject new connections from those IP addresses, for a configurable amount of time. Fail2Ban comes out-of-the-box ready to read many standard log files, such as those for sshd and Apache, and is easily configured to read any log file of your choosing, for any error you wish.

Though Fail2Ban is able to reduce the rate of incorrect authentication attempts, it cannot eliminate the risk presented by weak authentication. Set up services to use only two factor, or public/private authentication mechanisms if you really want to protect services.

Since v0.10 fail2ban supports the matching of IPv6 addresses.

This README is a quick introduction to Fail2Ban. More documentation, FAQ, and HOWTOs to be found on fail2ban(1) manpage, Wiki, Developers documentation and the website: https://www.fail2ban.org


It is possible that Fail2Ban is already packaged for your distribution. In this case, you should use that instead.



To install:

tar xvfj fail2ban-1.0.1.tar.bz2
cd fail2ban-1.0.1
sudo python setup.py install

Alternatively, you can clone the source from GitHub to a directory of Your choice, and do the install from there. Pick the correct branch, for example, master or 0.11

git clone https://github.com/fail2ban/fail2ban.git
cd fail2ban
sudo python setup.py install 

This will install Fail2Ban into the python library directory. The executable scripts are placed into /usr/bin, and configuration in /etc/fail2ban.

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 verify that you have the correct version installed with

fail2ban-client version

Please note that the system init/service script is not automatically installed. To enable fail2ban as an automatic service, simply copy the script for your distro from the files directory to /etc/init.d. Example (on a Debian-based system):

cp files/debian-initd /etc/init.d/fail2ban
update-rc.d fail2ban defaults
service fail2ban start


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 fail2ban-client(1) manpage. Also see fail2ban(1) and jail.conf(5) manpages for further references.

Code status:

  • travis-ci.org: tests status / tests status (0.11 branch) / tests status (0.10 branch)

  • coveralls.io: Coverage Status / Coverage Status (0.11 branch) / Coverage Status / (0.10 branch)

  • codecov.io: codecov.io / codecov.io (0.11 branch) / codecov.io (0.10 branch)


Bugs, feature requests, discussions?


You just appreciate this program:

Send kudos to the original author (Cyril Jaquier) or better to the mailing list since Fail2Ban is "community-driven" for years now.


See THANKS file.


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 version.

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., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA