{"id":20794,"date":"2016-11-14T07:50:30","date_gmt":"2016-11-14T13:50:30","guid":{"rendered":"https:\/\/www.rosehosting.com\/blog\/?p=20794"},"modified":"2022-06-03T03:42:32","modified_gmt":"2022-06-03T08:42:32","slug":"set-up-firewall-with-ufw-on-ubuntu","status":"publish","type":"post","link":"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/","title":{"rendered":"How To Set Up a Firewall with UFW on Ubuntu 16.04"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><p><img decoding=\"async\" class=\"alignnone size-full wp-image-25021\" src=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu.jpg\" alt=\"Set up a Firewall with UFW on Ubuntu\" width=\"1200\" height=\"600\" srcset=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu.jpg 1200w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-150x75.jpg 150w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-300x150.jpg 300w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-768x384.jpg 768w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-1024x512.jpg 1024w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-860x430.jpg 860w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-680x340.jpg 680w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-500x250.jpg 500w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-400x200.jpg 400w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-200x100.jpg 200w, https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2016\/11\/Set-up-a-Firewall-with-UFW-on-Ubuntu-50x25.jpg 50w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><br \/>\nWe&#8217;ll show you, how to set up a firewall with UFW on Ubuntu 16.04. If you have an Ubuntu server and you like to control the incoming and outgoing network traffic you need to configure the firewall that is included with your system. Linux kernel includes the <code>netfilter<\/code> subsystem which is a system for packet filtering. The traditional interface for manipulating netfilter is via <code>iptables<\/code>, which is primarily a database of firewall rules. The <code>Uncomplicated Firewall<\/code> or <code>ufw<\/code> is a frontend for iptables and it makes the <a href=\"https:\/\/www.rosehosting.com\/blog\/securing-your-ubuntudebian-based-vps-using-iptablesnetfilter-firewall\/\">iptables firewall configuration<\/a> and <a href=\"https:\/\/www.rosehosting.com\/blog\/blocking-abusive-ip-addresses-using-iptables-firewall-in-debianubuntu\/\">blocking IP addresses<\/a> much easier. In this guide, we will show you how to set up a firewall using UFW on a Linux VPS running <code>Ubuntu 16.04<\/code> as an operating system.<\/p>\n<p><!--more--><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-662d2d86dcc91\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-662d2d86dcc91\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/#1-Install-ufw\" title=\"1. Install ufw\">1. Install ufw<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/#2-Enable-ufw\" title=\"2. Enable ufw\">2. Enable ufw<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/#3-Check-the-default-configuration\" title=\"3.\u00a0\u00a0Check the default configuration\">3.\u00a0\u00a0Check the default configuration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/#4-Allow-connections-to-SSH\" title=\"4. Allow connections to SSH\">4. Allow connections to SSH<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/#5-Enable-other-services\" title=\"5. Enable other services\">5. Enable other services<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/#6-Allow-connections-from-specific-IP-addresses\" title=\"6. Allow connections from specific IP addresses\">6. Allow connections from specific IP addresses<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/#7-How-to-disable-uwf\" title=\"7. How to disable uwf\">7. How to disable uwf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/#8-Most-common-uwf-commands\" title=\"8. Most common uwf commands\">8. Most common uwf commands<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"1-Install-ufw\"><\/span>1. Install ufw<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Before you start, you should make sure that ufw is installed and running on your server. If not, you can use the apt package manager to install it.<\/p>\n<pre>sudo apt-get install ufw<\/pre>\n<h2><span class=\"ez-toc-section\" id=\"2-Enable-ufw\"><\/span>2. Enable ufw<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To enable ufw, you can use the command below:<\/p>\n<pre>sudo ufw enable<\/pre>\n<h2><span class=\"ez-toc-section\" id=\"3-Check-the-default-configuration\"><\/span>3.\u00a0\u00a0Check the default configuration<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Once enabled, ufw will be active and will start on system boot. Please note that all the incoming connections will be denied by default while the outgoing connections will be allowed. To check the default configuration, you can use the following command:<\/p>\n<pre>sudo ufw show raw<\/pre>\n<h2><span class=\"ez-toc-section\" id=\"4-Allow-connections-to-SSH\"><\/span>4. Allow connections to SSH<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Since the incoming connections to your <a href=\"https:\/\/www.rosehosting.com\/ubuntu-hosting.html\">Ubuntu VPS<\/a> are blocked by your firewall, nobody would be able to connect to it, including you. Therefore, you will need to allow connections to SSH.<\/p>\n<pre>sudo ufw allow ssh<\/pre>\n<p>or<\/p>\n<pre>sudo ufw allow 22\/tcp<\/pre>\n<p>where <code>22<\/code> is the port number where your SSH service is listening to.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"5-Enable-other-services\"><\/span>5. Enable other services<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Other services that may be enabled for incoming connections could be the following:<\/p>\n<pre>sudo ufw allow 80\/tcp\nsudo ufw allow 443\/tcp\nsudo ufw allow 21\/tcp<\/pre>\n<h2><span class=\"ez-toc-section\" id=\"6-Allow-connections-from-specific-IP-addresses\"><\/span>6. Allow connections from specific IP addresses<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Using ufw, you can allow connections from specific IP addresses too. For that purpose you can use the following command:<\/p>\n<pre>sudo ufw allow from 111.111.111.111<\/pre>\n<p>where 111.111.111.111 is the IP address you would like to allow connections from.<\/p>\n<p>To check the status, enter the command:<\/p>\n<pre>sudo ufw status<\/pre>\n<p>To delete a rule, you can prefix the original rule with delete. For example, to delete the rule you previously created enter the following command:<\/p>\n<pre>sudo ufw delete allow from 111.111.111.111<\/pre>\n<h2><span class=\"ez-toc-section\" id=\"7-How-to-disable-uwf\"><\/span>7. How to disable uwf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In case you would like to disable ufw, you can use:<\/p>\n<pre>sudo ufw disable<\/pre>\n<p>For more usage commands you can use the <code>--help<\/code> flag:<\/p>\n<pre>sudo ufw --help<\/pre>\n<h2><span class=\"ez-toc-section\" id=\"8-Most-common-uwf-commands\"><\/span>8. Most common uwf commands<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The most commonly used ufw commands are the following:<\/p>\n<pre> enable                          enables the firewall\n disable                         disables the firewall\n default ARG                     set default policy\n logging LEVEL                   set logging to LEVEL\n allow ARGS                      add allow rule\n deny ARGS                       add deny rule\n reject ARGS                     add reject rule\n limit ARGS                      add limit rule\n delete RULE|NUM                 delete RULE\n insert NUM RULE                 insert RULE at NUM\n route RULE                      add route RULE\n route delete RULE|NUM           delete route RULE\n route insert NUM RULE           insert route RULE at NUM\n reload                          reload firewall\n reset                           reset firewall\n status                          show firewall status\n status numbered                 show firewall status as numbered list of RULES\n status verbose                  show verbose firewall status\n show ARG                        show firewall report\n version                         display version information\n\nApplication profile commands:\n app list                        list application profiles\n app info PROFILE                show information on PROFILE\n app update PROFILE              update PROFILE\n app default ARG                 set default application policy<\/pre>\n<hr \/>\n<p>Of course you don\u2019t have to Set up a Firewall with UFW on Ubuntu, if you use one of our <a href=\"https:\/\/www.rosehosting.com\/ubuntu-hosting.html\">Ubuntu VPS hosting services<\/a>, in which case you can simply ask our expert Linux admins to Set up a Firewall with UFW on Ubuntu,\u00a0 for you. They are available 24\u00d77 and will take care of your request immediately.<\/p>\n<p>PS. If you liked this post, on how to\u00a0Set up a Firewall with UFW on Ubuntu,\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>\n","protected":false},"excerpt":{"rendered":"<p>We&#8217;ll show you, how to set up a firewall with UFW on Ubuntu 16.04. If you have an Ubuntu server &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How To Set Up a Firewall with UFW on Ubuntu 16.04\" class=\"read-more button\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/#more-20794\" aria-label=\"Read more about How To Set Up a Firewall with UFW on Ubuntu 16.04\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":25021,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1236,1703,1698],"tags":[147,59,1450],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How To Set Up a Firewall with UFW on Ubuntu 16.04 - RoseHosting<\/title>\n<meta name=\"description\" content=\"How To Set Up a Firewall with UFW on Ubuntu 16.04 - RoseHosting\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rosehosting.com\/blog\/set-up-firewall-with-ufw-on-ubuntu\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How To Set Up a Firewall with UFW on Ubuntu 16.04 - 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