{"id":3333,"date":"2016-01-05T07:04:29","date_gmt":"2016-01-05T07:04:29","guid":{"rendered":"https:\/\/cpanelplesk.com\/wp62\/?p=3333"},"modified":"2021-02-06T10:42:55","modified_gmt":"2021-02-06T10:42:55","slug":"installing-apf-firewall-on-your-system","status":"publish","type":"post","link":"https:\/\/cpanelplesk.com\/wp62\/installing-apf-firewall-on-your-system\/","title":{"rendered":"How to install APF Firewall on Your System"},"content":{"rendered":"<p><span style=\"color: #000000;\">In this article we will\u00a0explain how you can install and configure APF , which lets you easily configure a full featured firewall to secure servers your servers. In this guide we describes an example installation on a server with cPanel but APF can be used on any system.<\/span><!--more--><\/p>\n<p><span style=\"color: #000000;\">First, download the current version of the firewall:<\/span><\/p>\n<div class=\"command-sh\">\n<pre class=\"lang:default decode:true \">wget www.rfxn.com\/downloads\/apf-current.tar.gz\r\n<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">Next, uncompressed the archive, and enter the directory.<\/span><\/p>\n<div class=\"command-sh\">\n<pre class=\"\">tar -xzvf apf-current.tar.gz ; cd apf-*\r\n<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">Run the install.sh script, and make sure to check\u00a0the ports marked as Listening TCP Ports:<\/span><\/p>\n<div class=\"command-sh\">\n<pre>sh install.sh\r\n<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">After running install,\u00a0You&#8217;ll receive output such as below<\/span> :<\/p>\n<div class=\"output-sh\">\n<pre class=\"\"># sh install.sh\r\nInstalling APF 9.7-2: Completed.\r\nInstallation Details:\r\n  Install path:         \/etc\/apf\/\r\n  Config path:          \/etc\/apf\/conf.apf\r\n  Executable path:      \/usr\/local\/sbin\/apf\r\nOther Details:\r\n  Listening TCP ports: 21,25,80,110,143,443,465,587,993,995,2077,2078,2082,2083,2086,2087,2095,2096,2222,3306\r\n  Listening UDP ports:\r\n  Note: These ports are not auto-configured; they are simply presented for information purposes. You must manually configure all port options.\r\nroot@cpanel#\r\n<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">In this example, the ports we&#8217;ll be allowing within the configuration are : 21,25,80,110,143,443,465,587,993,995,2077,2078,2082,2083,2086,2087,2095,2096,2222,3306\u00a0<\/span><br \/>\n<span style=\"color: #000000;\">Open basic configuration file\u00a0<strong>\/etc\/apf\/conf.apf<\/strong> with your preferred text editor :<\/span><\/p>\n<div class=\"cpanel-files\"><\/div>\n<pre class=\"\">nano \/etc\/apf\/conf.apf\r\n<\/pre>\n<p><span style=\"color: #000000;\">Scroll and find the section with IG_TCP_CPORTS, these are the allowed inbound TCP ports where you will be pasting the existing opened ports on your server, see below for the original configuration.<\/span><\/p>\n<div class=\"command-sh\">\n<pre># Common inbound (ingress) TCP ports\r\nIG_TCP_CPORTS=\"22\"\r\n<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">Replace port 22 and paste the ports that APF returned as currently listening TCP ports during installation.<\/span><\/p>\n<div class=\"command-sh\">\n<pre># Common inbound (ingress) TCP ports\r\nIG_TCP_CPORTS=\"21,25,80,110,143,443,465,587,993,995,2077,2078,2082,2083,2086,2087,2095,2096,2222,3306\"\r\n<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">If your install returned any UDP ports, such as 53, add them to IG_UDP_CPORTS, which is directly below IG_TCP_CPORTS.<\/span><\/p>\n<p><span style=\"color: #000000;\">Next, search for the term monokern to change the Monolithic Kernel option to &#8216;1&#8217; so the kernel works same with our Cloud Kernel.<\/span><\/p>\n<div class=\"command-sh\">\n<pre># This allows the firewall to work around modular kernel issues by assuming\r\n# that the system has all required firewall modules compiled directly into\r\n# kernel. This mode of operation is not generally recommended but can be used\r\n# scale APF to unique situations.\r\nSET_MONOKERN=\"1\"\r\n<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">Save the file, and start APF with <strong>\/etc\/apf\/apf -r<\/strong><\/span><\/p>\n<div class=\"cpanel-files\"><\/div>\n<pre class=\"\">root@cpanel# \/etc\/apf\/apf -r\r\n<\/pre>\n<p><span style=\"color: #000000;\">Once the firewall has been loaded you will see a Development Mode message. Make sure that all connectivity is working correctly on your server before turning off Development Mode, it will flush the firewall every 5 minutes as a fail-safe so you do not lose access to your server.<\/span><br \/>\n<span style=\"color: #000000;\">\u00a0<\/span><br \/>\n<span style=\"color: #000000;\">Once you&#8217;ve confirmed the firewall is working properly, open \/etc\/apf\/conf.apf, and change DEVEL_MODE at top to 0.<\/span><\/p>\n<div class=\"command-sh\">\n<pre># When set to enabled; 5 minute cronjob is set to stop the firewall. Set\r\n# this off (0) when firewall is determined to be operating as desired.\r\nDEVEL_MODE=\"0\"\r\n<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">Save and close the file, then restart APF with \/etc\/apf\/apf -r to start your firewall without development mode.<\/span><\/p>\n<div class=\"cpanel-files\"><\/div>\n<pre class=\"\">root@cpanel# \/etc\/apf\/apf -r\r\n<\/pre>\n<p><span style=\"color: #000000;\">Additionally you can use the following parameters:<\/span><\/p>\n<div class=\"command-sh\">\n<pre class=\"lang:default decode:true\">-s - start APF\r\n-r - restart APF\r\n-f - stop APF\r\n-l - list statistics\r\n-st - status of APF\r\n-a host - allow connections from \"host\"\r\n-d host - deny connections from \"host\"<\/pre>\n<\/div>\n<p><span style=\"color: #000000;\">APF Firewall is now installed and now\u00a0we make sure APF started at boot time, so using <span class=\"system\">setup<\/span> command we go to <span class=\"system\">System Services<\/span>, tick APF and save the settings. After restarting the system APF should start automatically server.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this article we will\u00a0explain how you can install and configure APF , which lets you easily configure a full featured firewall to secure servers your servers. In this guide we describes an example installation on a server with cPanel but APF can be used on any system. [&#8230;]<\/p>\n<p><a class=\"understrap-read-more-link\" href=\"https:\/\/cpanelplesk.com\/wp62\/installing-apf-firewall-on-your-system\/\">Continue Reading&#8230;<\/a><\/p>\n","protected":false},"author":2,"featured_media":3335,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,14],"tags":[],"class_list":["post-3333","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cpanel","category-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to install APF Firewall on Your System - cPanel Plesk<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cpanelplesk.com\/wp62\/installing-apf-firewall-on-your-system\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"How to install APF Firewall on Your System - cPanel Plesk\" \/>\n<meta name=\"twitter:description\" content=\"In this article we will\u00a0explain how you can install and configure APF , which lets you easily configure a full featured firewall to secure servers your servers. 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