{"id":2082,"date":"2013-09-28T21:36:32","date_gmt":"2013-09-29T02:36:32","guid":{"rendered":"https:\/\/www.rosehosting.com\/blog\/?p=2082"},"modified":"2025-07-24T06:52:55","modified_gmt":"2025-07-24T11:52:55","slug":"install-fail2ban-on-centos","status":"publish","type":"post","link":"https:\/\/www.rosehosting.com\/blog\/install-fail2ban-on-centos\/","title":{"rendered":"Install Fail2ban on CentOS"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div>\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"1200\" height=\"600\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS.jpg\" alt=\"Install Fail2ban on CentOS\" class=\"wp-image-26527\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS.jpg 1200w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-150x75.jpg 150w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-300x150.jpg 300w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-768x384.jpg 768w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-1024x512.jpg 1024w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-860x430.jpg 860w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-680x340.jpg 680w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-500x250.jpg 500w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-400x200.jpg 400w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-200x100.jpg 200w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2013\/09\/Install-Fail2ban-on-CentOS-50x25.jpg 50w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"h-status-this-os-is-no-longer-supported\">Status: This OS is no longer supported<\/h5>\n\n\n\n<p><em>This article, &#8220;Install Fail2ban on CentOS,&#8221; covers a version of CentOS that reached end of life (EOL). It is no longer supported. As such, this guide is no longer maintained. If you are currently operating a server running CentOS 6, we highly recommend contacting <a href=\"https:\/\/www.rosehosting.com\/support\/\">RoseHosting&#8217;s fully managed support<\/a>. They can upgrade or migrate you to a supported version of AlmaLinux.<\/em><\/p>\n\n\n\n<!--more-->\n\n\n<p>In this article, we will explain how to install fail2ban on <a title=\"CentOS VPS Hosting\" href=\"https:\/\/www.rosehosting.com\/centos-hosting.html\" target=\"_blank\" rel=\"noopener noreferrer\">CentOS<\/a>. Fail2ban is a free and open-source framework developed in Python. It is an excellent and very helpful tool for stopping the endless brute force attacks on your services and preventing intrusions into your system. Fail2ban scans the log files on your server for repeated password failures and bans the offending IP addresses. Installing Fail2Ban on CentOS is an easy task if you carefully follow the steps below.<\/p>\n<h2>Installation Guide<\/h2>\n<p>Fail2ban is not available by default under CentOS, so first we need to enable the third party EPEL repository.<\/p>\n<p>CentOS 6 32 bit:<\/p>\n<pre class=\"brush: shell; gutter: true\"># rpm -Uvh http:\/\/mirror.pnl.gov\/epel\/\/6\/i386\/epel-release-6-8.noarch.rpm<\/pre>\n<p>CentOS 6 64 bit:<\/p>\n<pre class=\"brush: shell; gutter: true\"># rpm -Uvh http:\/\/mirror.us.leaseweb.net\/epel\/6\/x86_64\/epel-release-6-8.noarch.rpm<\/pre>\n<p>You can verify that the EPEL repository is enabled by executing:<\/p>\n<pre class=\"brush: shell; gutter: true\"># yum repolist\nRepository base is listed more than once in the configuration\nrepo id                                   repo name                                                              status\nbase                                      CentOS 6 - i686 - Base                                                 4,787+15\nepel                                      Extra Packages for Enterprise Linux 6 - i386                              7,959\nextras                                    CentOS-6 - Extras                                                            12\nupdates                                   CentOS-6 - Updates                                                       844+50\nupdates-released                          CentOS 6 - i686 - Released Updates                                       844+50\nrepolist: 14,446<\/pre>\n<p>Install fail2ban using the standard way for installing rpm packages:<\/p>\n<pre class=\"brush: shell; gutter: true\"># yum install fail2ban<\/pre>\n<p>Set fail2ban to start automatically on boot:<\/p>\n<pre class=\"brush: shell; gutter: true\"># chkconfig --add fail2ban\n# chkconfig fail2ban on<\/pre>\n<p>With this, the installation is done. Now you need to tweak fail2ban&#8217;s settings according to your needs by editing the default configuration file &#8216;jail.conf&#8217; located in the &#8216;\/etc\/fail2ban&#8217; directory on your server. In this file you can set which services you want to be monitored, the number of failed login attempts before the IP address is banned, the ban time of the IP address, etc&#8230;<\/p>\n<p>Open the \/etc\/fail2ban\/jail.conf file and add your own IP address and all your trusted IP addresses into the <strong>ignoreip<\/strong> line. Each IP address\/network can be separated with a space. For example:<\/p>\n<pre class=\"brush: shell; gutter: true\"># \"ignoreip\" can be an IP address, a CIDR mask or a DNS host. Fail2ban will not\n# ban a host which matches an address in this list. Several addresses can be\n# defined using space separator.\nignoreip = 127.0.0.1 1.2.3.4 123.123.123.0\/24<\/pre>\n<p>The next thing you will notice is <strong>bantime<\/strong>. This number shows how long the IP address will be blocked for by the server in seconds. The default number is 600 seconds and you can decrease or increase this number according to your needs.<\/p>\n<p><strong>maxretry<\/strong> is the number of failed login attempts before fail2ban bans an IP address.<\/p>\n<p><strong>findtime<\/strong> is a time frame in which a host has to log in. This means that if a host fails to log in to some of your services in this time frame it will be banned. The default findtime is 600 seconds.<\/p>\n<p>This file also contains default sections with basic rules about a few services that can be monitored.<\/p>\n<p>Once you have made the desired changes in the default jail.conf file you need to restart fail2ban:<\/p>\n<pre class=\"brush: shell; gutter: true\"># service fail2ban restart<\/pre>\n<p>You can check the iptables rules added by fail2ban by executing:<\/p>\n<pre class=\"brush: shell; gutter: true\"># iptables -L<\/pre>\n<h2>In Conclusion<\/h2>\n<p>Of course, if you are one of our <a title=\"Linux VPS Hosting\" href=\"https:\/\/www.rosehosting.com\/managed-vps-hosting.html\" target=\"_blank\" rel=\"noopener noreferrer\">Linux VPS Hosting<\/a> customers, you don\u2019t have to Install Fail2ban on CentOS, simply ask our admins, sit back and relax. Our admins will install Fail2Ban for you immediately.<\/p>\n<p><span style=\"color: #ff0000;\"><strong>PS.<\/strong><\/span> If you liked this post, on how to\u00a0Install Fail2ban on CentOS,\u00a0 please share it with your friends on the social networks using the buttons on the left or simply leave a reply below. Thanks<\/p>","protected":false},"excerpt":{"rendered":"<p>Status: This OS is no longer supported This article, &#8220;Install Fail2ban on CentOS,&#8221; covers a version of CentOS that reached &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Install Fail2ban on CentOS\" class=\"read-more button\" href=\"https:\/\/www.rosehosting.com\/blog\/install-fail2ban-on-centos\/#more-2082\" aria-label=\"Read more about Install Fail2ban on CentOS\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":26527,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1699,1701,1703,13],"tags":[124,280,281,177,1152,65],"class_list":["post-2082","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-centos","category-networking-and-domains","category-security","category-tutorials","tag-centos-vps","tag-fail2ban","tag-iptables","tag-linux-vps","tag-rosehosting","tag-security","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Install Fail2ban on CentOS | RoseHosting<\/title>\n<meta name=\"description\" content=\"Follow our guide to install Fail2ban on CentOS and protect your system from unauthorized access and 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