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fail2ban (32) Versions 2.1.2

Installs and configures fail2ban

cookbook 'fail2ban', '= 2.1.2'
cookbook 'fail2ban', '= 2.1.2', :supermarket
knife supermarket install fail2ban
knife supermarket download fail2ban
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Installs and configures fail2ban, a utility that watches logs for failed login attempts and blocks repeat offenders with firewall rules. On Redhat systems this cookbook will enable the EPEL repository in order to retrieve the fail2ban package.


Chef version 0.10.10+ and Ohai 0.6.12+ are required.


  • Debian, Ubuntu
  • Red Hat Enterprise Linux (CentOS/Amazon/Scientific/Oracle)
  • Fedora


  • yum



Installs the fail2ban package, manages 2 templates: /etc/fail2ban/fail2ban.conf and /etc/fail2ban/jail.conf, and manages the fail2ban service.


Typically, include recipe[fail2ban] in a base role applied to all nodes.


This cookbook makes use of a hash to compile the jail.local-file:

default['fail2ban']['services'] = {
  'ssh' => {
        "enabled" => "true",
        "port" => "ssh",
        "filter" => "sshd",
        "logpath" => node['fail2ban']['auth_log'],
        "maxretry" => "6"
  'smtp' => {
        "enabled" => "true",
        "port" => "smpt",
        "filter" => "smtp",
        "logpath" => node['fail2ban']['auth_log'],
        "maxretry" => "6"

The following attributes can be used per service:

  • enabled
  • port
  • filter
  • logpath
  • maxretry
  • protocol
  • banaction

Particular those related to rsyslog

If you are using rsyslog parameter "$RepeatedMsgReduction on" in rsyslog.conf file then you can get "Last message repeated N times" in system log file (for example auth.log). And it will affect the work of fail2ban, so that fail2ban will not work because the internal counter maxretry will not extend their Then you can change parameter "$RepeatedMsgReduction off" in rsyslog.conf file for maximum accuracy of maximum failed login attempts

This rsyslog parameter is default ON for ubuntu 12.04 LTS for example.

License and Author

Author:: Joshua Timberman

Copyright:: 2009-2013, Opscode, Inc

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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