{"id":117,"date":"2022-02-02T12:19:31","date_gmt":"2022-02-02T12:19:31","guid":{"rendered":"https:\/\/yohost.org\/library\/?p=117"},"modified":"2022-11-20T20:16:52","modified_gmt":"2022-11-20T20:16:52","slug":"cloudflare-anti-ddos-configuration","status":"publish","type":"post","link":"https:\/\/yohost.org\/library\/cloudflare-anti-ddos-configuration\/","title":{"rendered":"Cloudflare Anti-DDOS configuration"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Cloudflare is a popular DNS and traffic proxy provider. Besides it&#8217;s known for its robust DDOS protection which in most cases is free, especially when you know how to configure it right. In this article, we will share some of the techniques we at <a href=\"https:\/\/yohost.org\" target=\"_blank\" rel=\"noreferrer noopener\">yohost.org<\/a> use when our customers face DDOS attacks.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"basic-configuration\">Basic configuration<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-enable-proxying\">1. Enable proxying<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">First, you need to make sure that proxying is enabled in your Cloudflare DNS settings and all traffic is directed through Cloudflare. On the <em>Picture 1<\/em>, you can see where and how to enable traffic proxy. It&#8217;s important that proxy is enabled because otherwise attackers can find out your server&#8217;s IP and attack it directly.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><span class=\"placeholder-el\" data-svq-align=\"\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"336\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings.png\" alt=\"enable cloudflare proxy\" class=\"wp-image-127 lazy\" data-srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings-1024x336.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings-300x98.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings-768x252.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings.png 1115w\" data-sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-width=\"1024\" data-height=\"336\" data-src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings-1024x336.png\" style=\"height: 0; width: 1024px; padding-bottom: 32.81%;\"><span class=\"svq-img-loader\"><\/span><\/span><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"336\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings-1024x336.png\" alt=\"enable cloudflare proxy\" class=\"wp-image-127\" srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings-1024x336.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings-300x98.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings-768x252.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/proxy-settings.png 1115w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/noscript><figcaption class=\"wp-element-caption\">Picture 1. Enable proxy in Cloudflare.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-one-click-protection\">2. One click protection<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Simple DDOS protection is available with a click of a button. If you enable &#8220;Under Attack Mode&#8221;, visitors will have to enter CAPTCHA before they can enter the website.  On the <em>Picture 2<\/em>, you can see how to enable &#8220;Under Attack&#8221; mode.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><span class=\"placeholder-el\" data-svq-align=\"\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"300\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode.png\" alt=\"under attack cloudflare anti ddos mode\" class=\"wp-image-128 lazy\" data-srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode-1024x300.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode-300x88.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode-768x225.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode.png 1382w\" data-sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-width=\"1024\" data-height=\"300\" data-src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode-1024x300.png\" style=\"height: 0; width: 1024px; padding-bottom: 29.30%;\"><span class=\"svq-img-loader\"><\/span><\/span><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"300\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode-1024x300.png\" alt=\"under attack cloudflare anti ddos mode\" class=\"wp-image-128\" srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode-1024x300.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode-300x88.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode-768x225.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/under-attack-mode.png 1382w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/noscript><figcaption class=\"wp-element-caption\">Picture 2. Enable Under Attack Mode.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">There are two simple steps you need to take in order to start the fight against attackers. However usually this is not enough if attackers seriously want to take down your website.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"basic-advanced-configuration\">Basic-Advanced Configuration<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">I could not call it Advanced configuration because it&#8217;s still Basic for the tech savvy people. But for non-professionals we can call it advanced. The next step is to do a little bit of traffic analysis and configure some Firewall rules.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-traffic-analysis\">1. Traffic analysis<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cloudflare provides a lot of data about your website visitors including showing &#8220;good&#8221; and &#8220;bad&#8221; traffic and where it comes from. This data may help you to identify the attackers and apply some Firewall rules to better filter the incoming traffic. Go to <em>&#8220;Analytics&#8221; &gt; &#8220;Security&#8221;<\/em> to find out some information about your incoming traffic. See, <em>Picture 3<\/em>.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><span class=\"placeholder-el\" data-svq-align=\"\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"606\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics.png\" alt class=\"wp-image-129 lazy\" data-srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics-1024x606.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics-300x178.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics-768x455.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics.png 1365w\" data-sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-width=\"1024\" data-height=\"606\" data-src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics-1024x606.png\" style=\"height: 0; width: 1024px; padding-bottom: 59.18%;\"><span class=\"svq-img-loader\"><\/span><\/span><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"606\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics-1024x606.png\" alt=\"\" class=\"wp-image-129\" srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics-1024x606.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics-300x178.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics-768x455.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/traffic-analytics.png 1365w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/noscript><figcaption class=\"wp-element-caption\">Picture 3. Traffic Analytics tab.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">On the picture above you can see that Cloudflare identified 4 threats (visitors) within the last 24 hours and all of them came from Belgium. In this particular case, we are not going to do anything since the threat number is not significant. During attack you can see amount of threats count measured in thousands. In this case you can go ahead and create custom Firewall rules. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-firewall-configuration\">2. Firewall configuration<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">There are quite a few tools available to counter the attack in the free version of Cloudflare. Let&#8217;s go through them.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Bot Fight Mode. <\/strong>This tool aims to protect against attacks with automated traffic. Should be enabled in case of DDOS.  <\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><span class=\"placeholder-el\" data-svq-align=\"\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"543\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot.png\" alt=\"Bot fight mode cloudflare\" class=\"wp-image-131 lazy\" data-srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot-1024x543.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot-300x159.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot-768x407.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot.png 1366w\" data-sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-width=\"1024\" data-height=\"543\" data-src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot-1024x543.png\" style=\"height: 0; width: 1024px; padding-bottom: 53.03%;\"><span class=\"svq-img-loader\"><\/span><\/span><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"543\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot-1024x543.png\" alt=\"Bot fight mode cloudflare\" class=\"wp-image-131\" srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot-1024x543.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot-300x159.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot-768x407.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/anti-bot.png 1366w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/noscript><figcaption class=\"wp-element-caption\">Enable Bot Protection<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>DDOS protection.<\/strong> This tool provides automated mitigation of DDOS attacks. It analyses your traffic and decides which traffic is good or bad. You can configure Ruleset Action (either to block or show CAPTCHA) and Ruleset sensitivity (The higher the sensitivity is, the more chances that Firewall will block legit traffic). During the attack I recommend to set <strong>Rule Sensitivity<\/strong> to <strong>High<\/strong> and <strong>Rule Action<\/strong> to <strong>Captcha<\/strong>.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><span class=\"placeholder-el\" data-svq-align=\"\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"435\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure.png\" alt=\"auto ddos protection\" class=\"wp-image-132 lazy\" data-srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure-1024x435.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure-300x127.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure-768x326.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure.png 1337w\" data-sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-width=\"1024\" data-height=\"435\" data-src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure-1024x435.png\" style=\"height: 0; width: 1024px; padding-bottom: 42.48%;\"><span class=\"svq-img-loader\"><\/span><\/span><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"435\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure-1024x435.png\" alt=\"auto ddos protection\" class=\"wp-image-132\" srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure-1024x435.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure-300x127.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure-768x326.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/ddos-configure.png 1337w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/noscript><figcaption class=\"wp-element-caption\">Automated DDOS protection configuration.<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Firewall Rules<\/strong>. Here you can create custom rules based on the incoming traffic analysis. You can block\/challenge certain IPs, Countries, Continents, URL paths, ASNs etc. Mainly you will use these rules to block or challenge countries. Usually, attacks are not coming from the same countries as your customers and sales, so its the easiest and most efficient way to counter the attackers. See the image below for the example of a ruleset.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><span class=\"placeholder-el\" data-svq-align=\"\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"698\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule.png\" alt class=\"wp-image-134 lazy\" data-srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule-1024x698.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule-300x204.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule-768x523.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule.png 1375w\" data-sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-width=\"1024\" data-height=\"698\" data-src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule-1024x698.png\" style=\"height: 0; width: 1024px; padding-bottom: 68.16%;\"><span class=\"svq-img-loader\"><\/span><\/span><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"698\" src=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule-1024x698.png\" alt=\"\" class=\"wp-image-134\" srcset=\"https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule-1024x698.png 1024w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule-300x204.png 300w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule-768x523.png 768w, https:\/\/yohost.org\/library\/wp-content\/uploads\/2022\/02\/firewall-example-rule.png 1375w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/noscript><figcaption class=\"wp-element-caption\">Example of a Firewall Rule<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>About Pro.<\/strong> In most cases Basic configuration you have learned above will be sufficient to stop the attack. However in some cases you will have to go for a Pro version of Cloudflare to enable few more features like <strong>WAF<\/strong> (Web application firewall) and <strong>Rate Limiting<\/strong>. The latter is one of the most efficient tools against DDOS. It works by limiting amount of requests from one IP. Usually, attackers spam with requests from few IPs, sending hundreds of requests per second while regular users send very few. Rate limiting helps in this case.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"conclusion\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">From our experience, every attack is different and requires some skills to identify the method of attack and the best way to filter it. When attack starts, its always about how much time your website will be online VS offline during the attack. If attackers see that their attack does not succeed, they will stop it fast because it&#8217;s not free to run an attack. So, the main purpose of the technical engineer is to actively counter the attack and adjust protection every time attackers change vector of DDOS. <a href=\"http:\/\/www.cloudflare.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Cloudflare<\/a> is a good handy tool for this.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cloudflare is a popular DNS and traffic proxy provider. Besides it&#8217;s known for its robust DDOS protection which in most cases is free, especially when you know how to configure it right. In this article, we will share some of the techniques we at yohost.org use when our customers face DDOS attacks. Basic configuration 1. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":135,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"stax_block_gap":"","stax_show_title_section":"","stax_single_post_media_panel_height":"","stax_single_post_media_panel_text":"","stax_single_post_cateory_breadcrumb":"","stax_single_post_title_position":"","stax_single_post_title_align":"","stax_single_post_title_extra_align":"","stax_single_post_title_size":"","stax_single_post_image_width":"","stax_single_post_image_format":"","stax_single_post_audio_panel":"","stax_single_post_video_panel":"","stax_single_post_video_width":"","stax_single_post_gallery_panel":"","stax_single_post_gallery_width":"","stax_single_post_gallery_slides":"","stax_single_post_meta_author_avatar":"","stax_single_post_meta_author_name":"","stax_single_post_meta_post_date":"","stax_single_post_meta_reading_time":"","stax_single_post_shapes":"","footnotes":""},"categories":[5],"tags":[23],"class_list":["post-117","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-cloudflare-anti-ddos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.12 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Cloudflare Anti-DDOS configuration<\/title>\n<meta name=\"description\" content=\"In this article we describe how to make an anti-DDOS configuration using Cloudlfare service. 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