{"id":4364,"date":"2025-03-31T13:07:34","date_gmt":"2025-03-31T21:07:34","guid":{"rendered":"https:\/\/cheapsslsecurity.com\/blog\/?p=4364"},"modified":"2025-06-19T04:00:46","modified_gmt":"2025-06-19T12:00:46","slug":"how-to-fix-err_ssl_version_or_cipher_mismatch-error","status":"publish","type":"post","link":"https:\/\/cheapsslsecurity.com\/blog\/how-to-fix-err_ssl_version_or_cipher_mismatch-error\/","title":{"rendered":"How to Fix the Error &#8216;ERR_SSL_VERSION_OR_CIPHER_MISMATCH&#8217;"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Learn ways to kick the &#8216;ERR_SSL_VERSION_OR_CIPHER_MISMATCH&#8217; Error to the curb in a few quick steps<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Are website visitors facing the <strong>ERR_SSL_VERSION_OR_CIPHER_MISMATCH<\/strong> error on your website? Of course they are; why else would you be here, reading this article? This error is pretty common, and thousands of users around the world face it every single day.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We too faced the same error, but fortunately, we&#8217;re lucky to have SSL experts that have spent years solving these errors. This was just another error and needless to say, we\u2019ve come up with accurate solutions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The ERR_SSL_VERSION_OR_CIPHER_MISMATCH error often stems from the depreciation of the RC4 cipher. (The RC4 cipher was deemed insecure almost a decade ago, and Chrome doesn&#8217;t want you or your users to be in danger.) However, this isn&#8217;t the only causes<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-white-color has-text-color has-link-color wp-elements-8316013ea824fc2778f07762629b868e\">How to Fix Other SSL and Certificate-Related Errors<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Want to learn about <a href=\"https:\/\/cheapsslsecurity.com\/blog\/how-to-fix-common-security-certificate-error-issues\/\">10 common SSL\/TLS security certificate errors and issues<\/a> in Firefox and Chrome and what you can do to fix them? Check out our related resource.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Examples of This Error on Different Platforms<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chrome: <\/strong>ERR_SSL_VERSION_OR_CIPHER_MISMATCH (formerly SSL_OBSOLETE_VERSION)<\/li>\n\n\n\n<li><strong>Firefox: <\/strong>Error code: SSL_ERROR_NO_CYPHER_OVERLAP<\/li>\n\n\n\n<li><strong>OpenSSL: <\/strong>X509_V_ERR_SIGNATURE_ALGORITHM_MISMATCH<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Here&#8217;s a quick peek at what this error looks like in the wild:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"975\" height=\"549\" src=\"https:\/\/cheapsslsecurity.com\/blog\/wp-content\/uploads\/2018\/07\/chrome-ssl-certificate-error-ssl_version_or_cipher_mismatch.jpg\" alt=\"A screenshot of the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error in Firefox\" class=\"wp-image-8424\" title=\"err_ssl_version_or_cipher_mismatch error\" srcset=\"https:\/\/cheapsslsecurity.com\/blog\/wp-content\/uploads\/2018\/07\/chrome-ssl-certificate-error-ssl_version_or_cipher_mismatch.jpg 975w, https:\/\/cheapsslsecurity.com\/blog\/wp-content\/uploads\/2018\/07\/chrome-ssl-certificate-error-ssl_version_or_cipher_mismatch-300x169.jpg 300w\" sizes=\"(max-width: 975px) 100vw, 975px\" \/><figcaption class=\"wp-element-caption\">Image caption: A screenshot of the error &#8220;ERR_SSL_VERSION_OR_CIPHER_MISMATCH&#8221; in Firefox.<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">What Causes the &#8216;ERR_SSL_VERSION_OR_CIPHER_MISMATCH<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There can be three main reasons behind this error:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Your server is using an obsolete <a href=\"https:\/\/cheapsslsecurity.com\/blog\/tls-versions-what-they-are-and-which-ones-are-still-supported\/\">TLS version<\/a> (i.e., TLS 1.0 or 1.1).<\/li>\n\n\n\n<li>Your website doesn&#8217;t use SSL (or uses a content delivery network [CDN] that doesn&#8217;t support it)<\/li>\n\n\n\n<li>Your server still supports the <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Mozilla\/Firefox\/Releases\/50\">deprecated RC4 cipher<\/a>.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Alright. Now that we know what the error is and what its common causes are, let\u2019s get straight to solving ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to Fix ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"go_to_ssllabs\">Step 1: Go to SSL Labs<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Test your server using Qualys&#8217; free <a href=\"https:\/\/www.ssllabs.com\/ssltest\/analyze.html\">SSL check tool<\/a>. This will help you identify the root cause of your error and fix the problem accordingly. <\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"check_ssl\">Step 2: Check Your SSL Certificate<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Go to <strong>Test your server<\/strong><\/li>\n\n\n\n<li>Enter your hostname. For example, yourdomainname.com<\/li>\n\n\n\n<li>Click <strong>Submit<\/strong><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"ssl_name_mismatch\">Step 3: Is Your SSL Certificate Name Mismatched?<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Often, certificate name mismatching could be causing ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. As SSL Labs will show you, there are numerous reasons behind certificate name mismatch. Here are possible reasons:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The site does not use SSL but shares an IP address with some other site that does.<\/li>\n\n\n\n<li>The site no longer exists, yet the domain still points to the old IP address, where some other site is now hosted.<\/li>\n\n\n\n<li>The site uses a content delivery network (CDN) that doesn\u2019t support SSL.<\/li>\n\n\n\n<li>The domain name alias is for a website whose name is different, but the alias was not included in the certificate.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Check for each and try to fix it.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"older_tls_ssl_version\">Step 4: Are you running older SSL\/TLS versions?<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">If you\u2019re running an older version of SSL\/TLS, it could be causing ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. When you run your server check-in using the free SSL Labs tool, you\u2019d find SSL\/TLS versions under the configuration section. See whether any old, insecure protocols (i.e., SSL 2, SSL 3, TLS 1.0 and\/or TLS 1.1) are still being supported. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If so, disable it on your server ASAP.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"rc4_cipher\">Step 5: Does your server support the RC4 cipher?<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The main reason why your Chrome throws up ERR_SSL_VERSION_OR_CIPHER_MISMATCH error is that of the RC4 cipher. Deprecated a long time ago, the RC4 cipher was deemed insecure. When you run the scan in SSL labs, go to the Cipher Suites section to check RC4 cipher. If your server supports it, disable it ASAP!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you can\u2019t turn it off, enable other ciphers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We hope one of these solutions has helped you get rid of the <strong>ERR_SSL_VERSION_OR_CIPHER_MISMATCH<\/strong> error.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong>Editor&#8217;s Note:<\/strong> This article was originally published in July 2018. It&#8217;s been updated as of March 31, 2025 with newer, more current information.  <\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Related Posts<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/cheapsslsecurity.com\/blog\/mixed-content-error-how-to-disable-it-on-chrome\/\">What is Mixed Content Error &amp; How to Disable it on Chrome<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cheapsslsecurity.com\/blog\/brief-account-ssl-certificate-technical-errors\/\">Brief Account on SSL Certificate Technical Errors<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cheapsslsecurity.com\/blog\/apache-server-common-ssl-errors-and-troubleshooting-guide\/\">Apache Server: Common SSL Errors and Troubleshooting Guide<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cheapsslsecurity.com\/blog\/your-connection-is-not-private-error-a-fixing-guide-for-all-devices\/\">Your Connection is not Private Error \u2013 A Fixing Guide for all devices<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cheapsslsecurity.com\/blog\/troubleshoot-secure-connection-failed-error-firefox\/\">HowTroubleshoot \u2018Secure Connection Failed\u2019 Error in Firefox<\/a><\/li>\n<\/ul>\n\n\n\n<div class=\"graysection\">\n<h2>Buy SSL Certificate at Cheap Prices<\/h2>\n<p>Get maximum discounts of up to 89% on DV, Wildcard, Multi-Domain, OV &amp; EV SSL Certificate at CheapSSLsecurity. Boost up customer trust and secure their confidential information with high level encryption.<br>\n<a class=\"comparebtn\" href=\"https:\/\/cheapsslsecurity.com\/\">Shop for SSL Certificates at $5.45<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Learn ways to kick the &#8216;ERR_SSL_VERSION_OR_CIPHER_MISMATCH&#8217; Error to the curb in a few quick steps Are website visitors facing the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error on your website? Of course they are; why else would you be here, reading this article? This error is pretty common, and thousands of users around the world face it every single day.<\/p>\n","protected":false},"author":8,"featured_media":8428,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[5],"tags":[983,982,49],"class_list":["post-4364","post","type-post","status-publish","format-standard","has-post-thumbnail","category-ssl-pki","tag-cipher-mismatch","tag-protocol-version-error","tag-troubleshoot-ssl-error"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Fix ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error<\/title>\n<meta name=\"description\" content=\"If your site faces the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error regarding insecure ciphers, here&#039;s how to fix it within just a few minutes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cheapsslsecurity.com\/blog\/how-to-fix-err_ssl_version_or_cipher_mismatch-error\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Fix ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error\" \/>\n<meta property=\"og:description\" content=\"If your site faces the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error regarding insecure ciphers, here&#039;s how to fix it within just a few minutes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cheapsslsecurity.com\/blog\/how-to-fix-err_ssl_version_or_cipher_mismatch-error\/\" \/>\n<meta property=\"og:site_name\" content=\"Savvy Security\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/cheapsslsecurities\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-31T21:07:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-19T12:00:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cheapsslsecurity.com\/blog\/wp-content\/uploads\/2018\/07\/err_ssl_version_or_cipher_mismatch-feature2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Savvy Security\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@sslsecurity\" \/>\n<meta name=\"twitter:site\" content=\"@sslsecurity\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Savvy Security\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/cheapsslsecurity.com\\\/blog\\\/how-to-fix-err_ssl_version_or_cipher_mismatch-error\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/cheapsslsecurity.com\\\/blog\\\/how-to-fix-err_ssl_version_or_cipher_mismatch-error\\\/\"},\"author\":{\"name\":\"Savvy Security\",\"@id\":\"https:\\\/\\\/cheapsslsecurity.com\\\/blog\\\/#\\\/schema\\\/person\\\/1ce9a5743b7f25b5be6e4972864b4493\"},\"headline\":\"How to Fix the Error &#8216;ERR_SSL_VERSION_OR_CIPHER_MISMATCH&#8217;\",\"datePublished\":\"2025-03-31T21:07:34+00:00\",\"dateModified\":\"2025-06-19T12:00:46+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/cheapsslsecurity.com\\\/blog\\\/how-to-fix-err_ssl_version_or_cipher_mismatch-error\\\/\"},\"wordCount\":770,\"image\":{\"@id\":\"https:\\\/\\\/cheapsslsecurity.com\\\/blog\\\/how-to-fix-err_ssl_version_or_cipher_mismatch-error\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/cheapsslsecurity.com\\\/blog\\\/wp-content\\\/uploads\\\/2018\\\/07\\\/err_ssl_version_or_cipher_mismatch-feature2.jpg\",\"keywords\":[\"Cipher Mismatch\",\"Protocol Version Error\",\"Troubleshoot SSL Error\"],\"articleSection\":[\"SSL &amp; 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