{"id":21815,"date":"2026-11-06T01:04:43","date_gmt":"2026-11-05T22:04:43","guid":{"rendered":"https:\/\/sunucun.com.tr\/blog\/fix-err-connection-closed\/"},"modified":"2026-11-06T01:04:43","modified_gmt":"2026-11-05T22:04:43","slug":"fix-err-connection-closed","status":"publish","type":"post","link":"https:\/\/sunucun.com.tr\/blog\/fix-err-connection-closed\/","title":{"rendered":"What Are ERR_CONNECTION_CLOSED and ERR_EMPTY_RESPONSE and How Do You Fix Them?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<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:\/\/sunucun.com.tr\/blog\/fix-err-connection-closed\/#What_Does_ERR_CONNECTION_CLOSED_Mean\" >What Does ERR_CONNECTION_CLOSED Mean?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/sunucun.com.tr\/blog\/fix-err-connection-closed\/#Causes_of_the_Error\" >Causes of the Error<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/sunucun.com.tr\/blog\/fix-err-connection-closed\/#How_to_Fix_It_as_a_Visitor\" >How to Fix It as a Visitor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/sunucun.com.tr\/blog\/fix-err-connection-closed\/#How_to_Fix_It_as_a_Site_Owner\" >How to Fix It as a Site Owner<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/sunucun.com.tr\/blog\/fix-err-connection-closed\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\"><strong>ERR_CONNECTION_CLOSED<\/strong> is an error showing that the browser connected to a site but the server (or a device in between) closed the connection before sending the page data. Chrome then shows &#8220;\u2026 unexpectedly closed the connection&#8221; on the &#8220;This site can&#8217;t be reached&#8221; page. A similar error, <strong>ERR_EMPTY_RESPONSE<\/strong>, appears with the message &#8220;\u2026 didn&#8217;t send any data&#8221;. In this guide we explain the causes of both errors and how to fix them.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Does_ERR_CONNECTION_CLOSED_Mean\"><\/span>What Does ERR_CONNECTION_CLOSED Mean?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p class=\"wp-block-paragraph\">The browser has established a connection with the server and sent its request, but the connection was closed by the other side before a response arrived. This is different from ERR_CONNECTION_RESET, where the connection is cut abruptly by an RST packet: here the connection ends with a normal close, but the browser has not received the data it was waiting for. ERR_EMPTY_RESPONSE belongs to the same family and shows that the server closed the connection without sending any response.<\/p>\n\n\n<p class=\"wp-block-paragraph\">For the case where the connection is reset, see our guide on <a href=\"https:\/\/sunucun.com.tr\/blog\/err_connection_reset-en\/\">ERR_CONNECTION_RESET<\/a>; for the case where it is refused at the start, see <a href=\"https:\/\/sunucun.com.tr\/blog\/fix-err-connection-refused\/\">ERR_CONNECTION_REFUSED<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Causes_of_the_Error\"><\/span>Causes of the Error<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<ul class=\"wp-block-list\"><li><strong>Unstable connection or router problem:<\/strong> Connection drops can close the connection before the data the server sends reaches you.<\/li><li><strong>VPN, proxy or security software:<\/strong> Software that inspects traffic can close connections it finds suspicious.<\/li><li><strong>Network-level filtering:<\/strong> Workplace, school or internet provider filters can close connections to certain sites.<\/li><li><strong>A crashing process on the server:<\/strong> If the PHP or application process crashes before producing a response, the web server may close the connection with an empty response. This is the most common cause of ERR_EMPTY_RESPONSE.<\/li><li><strong>Server limits and security rules:<\/strong> A timeout, a memory limit or a security rule can end the connection without processing the request.<\/li><li><strong>HTTPS\/SSL configuration:<\/strong> Connecting with HTTPS to a port that expects HTTP (or the other way round) can make the connection close without any data.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Fix_It_as_a_Visitor\"><\/span>How to Fix It as a Visitor<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<ol class=\"wp-block-list\"><li><strong>Try opening the site from another network:<\/strong> If it opens on your phone over mobile data, the problem is on your network; if not, it is most likely on the site.<\/li><li><strong>Restart your router.<\/strong><\/li><li><strong>Turn off VPN and proxy:<\/strong> On Windows, check <strong>Settings &gt; Network &amp; Internet &gt; Proxy<\/strong>.<\/li><li><strong>Test your security software:<\/strong> Briefly turn off the antivirus web protection or HTTPS scanning and try again.<\/li><li><strong>Reset network settings:<\/strong> Open Command Prompt as administrator, run these commands and restart the computer:<\/li><\/ol>\n\n\n<pre class=\"wp-block-code\"><code>netsh winsock reset\nnetsh int ip reset\nipconfig \/flushdns<\/code><\/pre>\n\n\n<ol start=\"6\" class=\"wp-block-list\"><li><strong>Clear the browser cache and turn off extensions:<\/strong> Try the site in an incognito window; if it opens, turn extensions off one by one.<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Fix_It_as_a_Site_Owner\"><\/span>How to Fix It as a Site Owner<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<ol class=\"wp-block-list\"><li><strong>Check the error logs:<\/strong> &#8220;segmentation fault&#8221;, &#8220;upstream prematurely closed connection&#8221; or memory limit warnings in the web server and PHP-FPM error logs point to crashing processes.<\/li><li><strong>Check memory and time limits:<\/strong> Review <code>memory_limit<\/code>, <code>max_execution_time<\/code> and the web server&#8217;s timeout settings. Identify heavy plugins or queries.<\/li><li><strong>Review security rules:<\/strong> ModSecurity, WAF or CDN rules can block certain requests by closing the connection.<\/li><li><strong>Verify the port and protocol match:<\/strong> Make sure HTTPS is served on port 443 and HTTP on port 80, and that the SSL certificate is installed correctly.<\/li><li><strong>Monitor resource usage:<\/strong> Servers that reach their process or connection limits may close new requests without a response.<\/li><\/ol>\n\n\n<p class=\"wp-block-paragraph\">If you want full access to server settings and error logs, a <a href=\"https:\/\/sunucun.com.tr\/en\/vds-server\">VDS server<\/a> with root access lets you carry out all of these checks yourself.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p class=\"wp-block-paragraph\">ERR_CONNECTION_CLOSED and ERR_EMPTY_RESPONSE show that the connection was closed without a response being sent. As a visitor, changing the network, checking the VPN, proxy and security software, and resetting network settings is usually enough. If everyone sees the error, review the server&#8217;s error logs, limits and security rules.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ERR_CONNECTION_CLOSED is an error showing that the browser connected to a site but the server (or a device in between) closed the connection before sending the page data. Chrome then shows &#8220;\u2026 unexpectedly closed the connection&#8221; on the &#8220;This site can&#8217;t be reached&#8221; page. A similar error, ERR_EMPTY_RESPONSE, appears with the message &#8220;\u2026 didn&#8217;t send&hellip;<\/p>\n","protected":false},"author":1,"featured_media":21821,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[1523],"tags":[],"class_list":["post-21815","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-network"],"_links":{"self":[{"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/posts\/21815","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/comments?post=21815"}],"version-history":[{"count":0,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/posts\/21815\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/media\/21821"}],"wp:attachment":[{"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/media?parent=21815"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/categories?post=21815"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sunucun.com.tr\/blog\/wp-json\/wp\/v2\/tags?post=21815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}