{"id":50890,"date":"2026-07-20T12:44:06","date_gmt":"2026-07-20T06:44:06","guid":{"rendered":"https:\/\/fluentsupport.com\/?p=50890"},"modified":"2026-07-20T14:45:40","modified_gmt":"2026-07-20T08:45:40","slug":"error-code-520","status":"publish","type":"post","link":"https:\/\/fluentsupport.com\/error-code-520\/","title":{"rendered":"Error Code 520: What It Means and How to Fix It"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Error code 520 shows up as &#8220;Web server is returning an unknown error&#8221; on any site that runs behind Cloudflare. It means Cloudflare reached your server but got back a response it could not read.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you run a website, this error can appear at the worst possible moment, right when traffic peaks or a deploy goes out. If you are just a visitor, it can look like the whole internet broke for you and nobody else.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this blog, we will break down what causes error 520, how to fix it from both sides, and how it differs from other Cloudflare error codes.<\/p>\n\n\n<style>.kb-row-layout-id50890_78645e-2e > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id50890_78645e-2e > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id50890_78645e-2e > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id50890_78645e-2e{border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;overflow:clip;isolation:isolate;}.kb-row-layout-id50890_78645e-2e > .kt-row-layout-overlay{border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;}.kb-row-layout-id50890_78645e-2e{border-top:1px solid #15be7c;border-right:1px solid #15be7c;border-bottom:1px solid #15be7c;border-left:1px solid #15be7c;}.kb-row-layout-id50890_78645e-2e > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id50890_78645e-2e > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id50890_78645e-2e{border-top:1px solid #15be7c;border-right:1px solid #15be7c;border-bottom:1px solid #15be7c;border-left:1px solid #15be7c;}}@media all and (max-width: 767px){.kb-row-layout-id50890_78645e-2e > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id50890_78645e-2e{border-top:1px solid #15be7c;border-right:1px solid #15be7c;border-bottom:1px solid #15be7c;border-left:1px solid #15be7c;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id50890_78645e-2e alignnone has-theme-palette8-background-color kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column50890_0a36f2-0d > .kt-inside-inner-col,.kadence-column50890_0a36f2-0d > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column50890_0a36f2-0d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column50890_0a36f2-0d > .kt-inside-inner-col{flex-direction:column;}.kadence-column50890_0a36f2-0d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column50890_0a36f2-0d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column50890_0a36f2-0d{position:relative;}@media all and (max-width: 1024px){.kadence-column50890_0a36f2-0d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column50890_0a36f2-0d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column50890_0a36f2-0d\"><div class=\"kt-inside-inner-col\">\n<p class=\"wp-block-paragraph\" style=\"font-size:27px\">Key Takeaways<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Error 520 means Cloudflare got an empty or broken response from your origin server.<\/li>\n\n\n\n<li>It is not a standard HTTP code. Cloudflare created it specifically for this scenario.<\/li>\n\n\n\n<li>Common causes include server crashes, blocked Cloudflare IPs, oversized headers, and bad HTTP\/2 setup.<\/li>\n\n\n\n<li>Visitors can clear cookies, switch browsers, or wait a few minutes before trying again.<\/li>\n\n\n\n<li>Site owners should check server logs, whitelist Cloudflare IPs, and review header size.<\/li>\n\n\n\n<li>The fix depends on the origin server. Cloudflare is only the messenger here.<\/li>\n<\/ul>\n<\/div><\/div>\n\n<\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">What Is Error Code 520<\/h2>\n\n\n\n<p class=\"has-theme-palette-8-background-color has-background wp-block-paragraph\"><strong>Error code 520 is a Cloudflare-specific status that appears when the origin server sends back an empty, unknown, or malformed response. <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike error codes such as 502 or 503, it is not part of the official HTTP standard. You will sometimes see it written as http 520, 520 status code, or 520 error code. All three point to the same Cloudflare specific message.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/developers.cloudflare.com\/support\/troubleshooting\/http-status-codes\/cloudflare-5xx-errors\/error-520\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Cloudflare docs<\/a> describe it plainly: the origin server returned an empty, unknown, or unexpected response. In simple terms, your server picked up the connection and then sent back nothing useful. This can happen because of a crash, a firewall block, or a response that breaks Cloudflare&#8217;s formatting rules.<\/p>\n\n\n<style>.kb-image50890_ea8944-9b .kb-image-has-overlay:after{opacity:0.3;border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;}.kb-image50890_ea8944-9b img.kb-img, .kb-image50890_ea8944-9b .kb-img img{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;}@media all and (max-width: 1024px){.kb-image50890_ea8944-9b img.kb-img, .kb-image50890_ea8944-9b .kb-img img{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-image50890_ea8944-9b img.kb-img, .kb-image50890_ea8944-9b .kb-img img{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);}}<\/style>\n<figure class=\"wp-block-kadence-image kb-image50890_ea8944-9b size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/1.-Error-Code-520-Web-Server-is-Returning-an-Unknown-Error-Fluent-Support.webp\" alt=\"Error Code 520 - Web Server is Returning an Unknown Error - Fluent Support\" class=\"kb-img wp-image-50891\" srcset=\"https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/1.-Error-Code-520-Web-Server-is-Returning-an-Unknown-Error-Fluent-Support.webp 1000w, https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/1.-Error-Code-520-Web-Server-is-Returning-an-Unknown-Error-Fluent-Support-300x200.webp 300w, https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/1.-Error-Code-520-Web-Server-is-Returning-an-Unknown-Error-Fluent-Support-768x512.webp 768w, https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/1.-Error-Code-520-Web-Server-is-Returning-an-Unknown-Error-Fluent-Support-360x240.webp 360w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Common Causes of Error 520<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Error 520, sometimes labeled cloudflare error 520 or just cloudflare 520, almost always traces back to a handful of repeat offenders on the origin side.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Server crashes:<\/strong> Server crashes happen when a PHP process runs out of memory or hits a fatal error mid request. That leaves Cloudflare with nothing coherent to relay.<\/li>\n\n\n\n<li><strong>Blocked Cloudflare IPs:<\/strong> Blocked Cloudflare IPs occur when a firewall or security plugin rejects Cloudflare&#8217;s requests, so the origin never replies properly.<\/li>\n\n\n\n<li><strong>Oversized headers:<\/strong> Oversized headers appear when cookies or custom headers push past Cloudflare&#8217;s size limit, currently capped at 128 KB.<\/li>\n\n\n\n<li><strong>HTTP\/2 mismatches:<\/strong> HTTP\/2 mismatches happen when a server announces HTTP\/2 support but does not actually honor the protocol once Cloudflare connects.<\/li>\n\n\n\n<li><strong>Empty responses:<\/strong> Empty responses occur when the server closes the connection before it sends a status code or response body.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix Error 520<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Most Error 520 issues are server-side, but these simple checks are worth trying before contacting the site owner.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">For Visitors<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If error 520 shows up while you are just browsing, the problem sits on the site&#8217;s server, not your device. A few checks are still worth trying.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Clear cookies: <\/strong>Clear cookies for that specific site since a bloated cookie file can trip Cloudflare&#8217;s header limit.<\/li>\n\n\n\n<li><strong>Switch browsers:<\/strong> Switch browsers or try an incognito window to rule out a corrupted local cache.<\/li>\n\n\n\n<li><strong>Check your VPN:<\/strong> Check your VPN status, since some proxy setups get flagged differently by the origin server.<\/li>\n\n\n\n<li><strong>Wait it out:<\/strong> Wait it out for a few minutes. The site owner is likely already fixing a server side crash.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">For Site Owners<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If your own site is throwing error 520, start with the origin server, since that is where the fault lives.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Check server logs:<\/strong> Check server logs for PHP fatal errors or crash timestamps that line up with the 520 reports.<\/li>\n\n\n\n<li><strong>Whitelist Cloudflare IPs:<\/strong> Whitelist Cloudflare IPs in your firewall so legitimate proxy requests never get silently dropped.<\/li>\n\n\n\n<li><strong>Trim response headers:<\/strong> Trim response headers and cookies if a HAR file shows you are close to the size limit.<\/li>\n\n\n\n<li><strong>Review HTTP\/2 settings:<\/strong> Review HTTP\/2 settings at the origin, or disable HTTP\/2 to origin in Cloudflare&#8217;s Speed settings as a quick test.<\/li>\n\n\n\n<li><strong>Pause Cloudflare temporarily: <\/strong>Pause Cloudflare temporarily to confirm whether the issue disappears once the proxy is out of the picture.<\/li>\n<\/ul>\n\n\n<style>.kb-image50890_446916-eb .kb-image-has-overlay:after{opacity:0.3;border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;}.kb-image50890_446916-eb img.kb-img, .kb-image50890_446916-eb .kb-img img{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;}@media all and (max-width: 1024px){.kb-image50890_446916-eb img.kb-img, .kb-image50890_446916-eb .kb-img img{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-image50890_446916-eb img.kb-img, .kb-image50890_446916-eb .kb-img img{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);}}<\/style>\n<figure class=\"wp-block-kadence-image kb-image50890_446916-eb size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"667\" src=\"https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/2.-5-Quick-Fixes-for-Error-Code-520-Fluent-Support-Blog.webp\" alt=\"5 Quick Fixes for Error Code 520 - Fluent Support Blog\" class=\"kb-img wp-image-50892\" srcset=\"https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/2.-5-Quick-Fixes-for-Error-Code-520-Fluent-Support-Blog.webp 1000w, https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/2.-5-Quick-Fixes-for-Error-Code-520-Fluent-Support-Blog-300x200.webp 300w, https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/2.-5-Quick-Fixes-for-Error-Code-520-Fluent-Support-Blog-768x512.webp 768w, https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/2.-5-Quick-Fixes-for-Error-Code-520-Fluent-Support-Blog-360x240.webp 360w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Error 520 vs Other Cloudflare Errors<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Error 520 gets mixed up with Cloudflare&#8217;s other 5xx codes fairly often, so it helps to separate them clearly.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Error 520:<\/strong> Error 520 means Cloudflare connected fine, but the response it got back was empty or broken.<\/li>\n\n\n\n<li><a href=\"https:\/\/fluentsupport.com\/http-error-521-fix\/\" target=\"_blank\" rel=\"noreferrer noopener\">Error 521<\/a>: Error 521 means the origin server refused the connection outright, often because it is offline.<\/li>\n\n\n\n<li><a href=\"https:\/\/fluentsupport.com\/error-522-meaning-and-how-to-fix\/\" target=\"_blank\" rel=\"noreferrer noopener\">Error 522<\/a>: Error 522 means Cloudflare could not even establish a TCP connection before it timed out.<\/li>\n\n\n\n<li><a href=\"https:\/\/fluentsupport.com\/502-bad-gateway-fix\/\" target=\"_blank\" rel=\"noreferrer noopener\">502 error<\/a>: A 502 error is a standard HTTP code that usually points to a misconfigured proxy or upstream server, separate from Cloudflare&#8217;s own numbering.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The core difference is simple: connection success versus connection failure versus a bad response.<\/p>\n\n\n<style>.kb-image50890_fb61f7-ea .kb-image-has-overlay:after{opacity:0.3;border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;}.kb-image50890_fb61f7-ea img.kb-img, .kb-image50890_fb61f7-ea .kb-img img{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;}@media all and (max-width: 1024px){.kb-image50890_fb61f7-ea img.kb-img, .kb-image50890_fb61f7-ea .kb-img img{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-image50890_fb61f7-ea img.kb-img, .kb-image50890_fb61f7-ea .kb-img img{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);}}<\/style>\n<figure class=\"wp-block-kadence-image kb-image50890_fb61f7-ea size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"597\" src=\"https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/3.-Error-520-vs-521-vs-522-vs-502-Quick-Comparison-of-Cloudflare-Errors-Fluent-Support-Blog.webp\" alt=\"Error 520 vs 521 vs 522 vs 502 - Quick Comparison of Cloudflare Errors - Fluent Support Blog\" class=\"kb-img wp-image-50893\" srcset=\"https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/3.-Error-520-vs-521-vs-522-vs-502-Quick-Comparison-of-Cloudflare-Errors-Fluent-Support-Blog.webp 1000w, https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/3.-Error-520-vs-521-vs-522-vs-502-Quick-Comparison-of-Cloudflare-Errors-Fluent-Support-Blog-300x179.webp 300w, https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/3.-Error-520-vs-521-vs-522-vs-502-Quick-Comparison-of-Cloudflare-Errors-Fluent-Support-Blog-768x458.webp 768w, https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/07\/3.-Error-520-vs-521-vs-522-vs-502-Quick-Comparison-of-Cloudflare-Errors-Fluent-Support-Blog-360x215.webp 360w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Prevent Error 520<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A little prevention goes a long way toward keeping error 520 out of your logs for good.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Monitor resources:<\/strong> Monitor resources like CPU and memory so a slow leak gets caught before it crashes your server.<\/li>\n\n\n\n<li><strong>Keep IP lists current:<\/strong> Keep IP lists current by updating your Cloudflare allowlist whenever Cloudflare publishes new ranges.<\/li>\n\n\n\n<li><strong>Raise timeout limits:<\/strong> Raise timeout limits on your server above 300 seconds to match Cloudflare&#8217;s own connection timeout.<\/li>\n\n\n\n<li><strong>Update PHP regularly:<\/strong> Update PHP regularly, since outdated versions and plugins are a frequent trigger for mid request crashes.<\/li>\n<\/ul>\n\n\n<style>.kadence-column49863_e0055e-94 > .kt-inside-inner-col,.kadence-column49863_e0055e-94 > .kt-inside-inner-col:before{border-top-left-radius:16px;border-top-right-radius:16px;border-bottom-right-radius:16px;border-bottom-left-radius:16px;}.kadence-column49863_e0055e-94 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column49863_e0055e-94 > .kt-inside-inner-col{flex-direction:column;}.kadence-column49863_e0055e-94 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column49863_e0055e-94 > .kt-inside-inner-col{background-image:url('https:\/\/fluentsupport.com\/wp-content\/uploads\/2026\/04\/Customer-Support-Trends-2026-scaled.webp');background-size:cover;background-position:15% 78%;background-attachment:scroll;background-repeat:no-repeat;}.kadence-column49863_e0055e-94 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column49863_e0055e-94{position:relative;}@media all and (max-width: 1024px){.kadence-column49863_e0055e-94 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column49863_e0055e-94 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column49863_e0055e-94 kvs-sm-false\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id49863_3aaba4-70{margin-top:0px;margin-bottom:0px;}.kb-row-layout-id49863_3aaba4-70 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id49863_3aaba4-70 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id49863_3aaba4-70 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-right:var(--global-kb-spacing-xxs, 0.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);padding-left:var(--global-kb-spacing-xxs, 0.5rem);grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}.kb-row-layout-id49863_3aaba4-70 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id49863_3aaba4-70 > .kt-row-column-wrap{grid-template-columns:minmax(0, 2fr) minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id49863_3aaba4-70 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id49863_3aaba4-70 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-left-golden kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column49863_180c7a-a3 > .kt-inside-inner-col{padding-top:var(--global-kb-spacing-5xl, 10rem);padding-bottom:var(--global-kb-spacing-lg, 3rem);padding-left:var(--global-kb-spacing-sm, 1.5rem);}.kadence-column49863_180c7a-a3 > .kt-inside-inner-col,.kadence-column49863_180c7a-a3 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column49863_180c7a-a3 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column49863_180c7a-a3 > .kt-inside-inner-col{flex-direction:column;}.kadence-column49863_180c7a-a3 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column49863_180c7a-a3 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column49863_180c7a-a3{position:relative;}@media all 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.kt-modal-close:focus{color:var(--global-palette9, #ffffff);}@media all and (max-width: 1024px){#kt-modal49863_728561-bf .kt-blocks-modal-link{font-size:17px;}}@media all and (max-width: 1024px){#kt-modal49863_728561-bf .kt-blocks-modal-link svg{width:17px;}}@media all and (max-width: 1024px){#kt-modal49863_728561-bf .kt-modal-container, #kt-target-modal49863_728561-bf .kt-modal-container, .kb-modal-content49863_728561-bf .kt-modal-container{width:100%;border-top:0px solid #ffffff;border-right:0px solid #ffffff;border-bottom:0px solid #ffffff;border-left:0px solid #ffffff;}}@media all and (max-width: 1024px){#kt-modal49863_728561-bf .kt-modal-close svg, #kt-target-modal49863_728561-bf .kt-modal-close svg, .kb-modal-content49863_728561-bf .kt-modal-close svg{width:24px;height:24px;}}@media all and (max-width: 767px){#kt-modal49863_728561-bf .kt-modal-container, #kt-target-modal49863_728561-bf .kt-modal-container, .kb-modal-content49863_728561-bf .kt-modal-container{width:100%;border-top:0px solid #ffffff;border-right:0px solid #ffffff;border-bottom:0px solid #ffffff;border-left:0px solid #ffffff;}#kt-modal49863_728561-bf .kt-modal-close svg, #kt-target-modal49863_728561-bf .kt-modal-close svg, .kb-modal-content49863_728561-bf .kt-modal-close svg{width:24px;height:24px;}}<\/style>\n<div class=\"wp-block-kadence-modal alignnone kt-modal-linkalign-left downloadmodalBox\" id=\"kt-modal49863_728561-bf\"><button class=\"kb-btn-global-custom kt-modal-label-show kt-blocks-modal-link\" data-modal-open=\"kt-target-modal49863_728561-bf\"><span class=\"kt-blocks-modal-link-inner\">DOWNLOAD<\/span><\/button><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column49863_1f1abe-1c > .kt-inside-inner-col,.kadence-column49863_1f1abe-1c > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column49863_1f1abe-1c > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column49863_1f1abe-1c > .kt-inside-inner-col{flex-direction:column;}.kadence-column49863_1f1abe-1c > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column49863_1f1abe-1c > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column49863_1f1abe-1c{position:relative;}@media all and (max-width: 1024px){.kadence-column49863_1f1abe-1c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column49863_1f1abe-1c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column49863_1f1abe-1c\"><div class=\"kt-inside-inner-col\"><\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Wrapping Up<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Error 520 is annoying, but it is rarely permanent. The message is really Cloudflare&#8217;s way of saying it could not make sense of what your server sent back.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For visitors, a refresh or a cleared cache often solves it. For site owners, the fix lives in the error logs, the firewall rules, or the header sizes on your origin server. Once that root cause gets addressed, the error goes away and stays away.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A stable site keeps support conversations moving, and that matters as much as the fix itself.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Is error 520 the same as my site being down?&nbsp;<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Not exactly. Your server is reachable. It just sent Cloudflare a response that Cloudflare could not process, so the effect looks similar to visitors even though the cause is different.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Does error 520 affect SEO?&nbsp;<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Persistent 520 errors can lower crawl rates and delay indexing, since search engines treat repeated 5xx responses as a signal the page is unreliable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Can Cloudflare cause error 520 on its own?&nbsp;<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rarely. The error almost always originates at the origin server. Checking Cloudflare&#8217;s status page first can rule out a platform wide incident.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How long does error 520 usually last?&nbsp;<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It depends on the cause. A crashed process can recover in minutes, while a firewall block or header issue stays until someone fixes the configuration.<\/p>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25, .wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25[data-kb-block=\"kb-adv-heading45604_b618d9-25\"]{padding-top:32px;padding-right:32px;padding-bottom:32px;padding-left:32px;margin-bottom:0px;font-style:normal;background-color:#fbfffc;border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;}.wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25[data-kb-block=\"kb-adv-heading45604_b618d9-25\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25[data-kb-block=\"kb-adv-heading45604_b618d9-25\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 1024px){.wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25, .wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25[data-kb-block=\"kb-adv-heading45604_b618d9-25\"]{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25, .wp-block-kadence-advancedheading.kt-adv-heading45604_b618d9-25[data-kb-block=\"kb-adv-heading45604_b618d9-25\"]{border-top:2px solid var(--global-palette1, #3182CE);border-right:2px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:2px solid var(--global-palette1, #3182CE);}}<\/style>\n<p class=\"kt-adv-heading45604_b618d9-25 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading45604_b618d9-25\">Want a system that makes ticket handling this smooth? Fluent Support brings structure and clarity to every request so your team always knows exactly what to do next. See how it works.<\/p>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns45604_86ed75-ca{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns45604_86ed75-ca .kt-button{font-weight:normal;font-style:normal;}.kt-btns45604_86ed75-ca .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns45604_86ed75-ca .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns45604_86ed75-ca .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns45604_86ed75-ca .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns45604_86ed75-ca .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns45604_86ed75-ca .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns45604_86ed75-ca .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns45604_86ed75-ca\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn45604_ad6cfe-1c.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn45604_ad6cfe-1c.kb-button{background:#44c78a;margin-top:-20px;}.wp-block-kadence-advancedbtn .kb-btn45604_ad6cfe-1c.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn45604_ad6cfe-1c.kb-button:focus{background:#ffc865;}<\/style><a class=\"kb-button kt-button button kb-btn45604_ad6cfe-1c kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-fill kt-btn-has-text-true kt-btn-has-svg-false wp-block-kadence-singlebtn\" href=\"https:\/\/fluentsupport.com\/features\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"kt-btn-inner-text\">Explore Fluent Support Now!<\/span><\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Error code 520 means Cloudflare got an empty or broken response from your server. Here&#8217;s what causes it and how to fix it fast.<\/p>\n","protected":false},"author":23,"featured_media":50894,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[341],"tags":[37,967],"class_list":["post-50890","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-web","tag-customer-support","tag-error-code-520"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Error Code 520: What It Means and How to Fix It - Fluent Support<\/title>\n<meta name=\"description\" content=\"Error code 520 means Cloudflare got an empty or broken response from your server. 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