{"id":2272,"date":"2024-08-27T12:10:25","date_gmt":"2024-08-27T12:10:25","guid":{"rendered":"https:\/\/certera.com\/kb\/?p=2272"},"modified":"2024-10-07T07:22:06","modified_gmt":"2024-10-07T07:22:06","slug":"how-to-fix-err-tunnel-connection-failed-error","status":"publish","type":"post","link":"https:\/\/certera.com\/kb\/how-to-fix-err-tunnel-connection-failed-error\/","title":{"rendered":"How to Fix Err_Tunnel_Connection_Failed Error?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Google Chrome is one of the most popular browsers users use (almost 65.38% as of June 2024). It is so because it is the fastest web browser as of now, and we all can agree on one thing \u2013 \u201cSpeed\u201d matters when it comes to browsing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Apart from that, various other features and timely patches that keep this browser secure from hackers and malicious malware are also important factors contributing to its popularity and wide use.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"box-sizing: border-box; margin: 0px; padding: 0px;\">Despite various features and security measures, Google Chrome is&nbsp;<strong>NOT&nbsp;<\/strong>error-free.<\/span> Several errors, such as Err_Cache_Miss, NET::ERR_Cert_Weak_Signature_Algorithm, Err_Tunnel_Connection_Failed, and many more, can be seen displayed on the browser\u2019s screen. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These errors are frustrating and troublesome to remove, especially the Err_Tunnel_Connection_Failed Error. This error mainly occurs when the browser cannot connect securely with the site, leading to a poor browsing experience and delay in performing essential tasks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the Err_Tunnel_Connection_Failed Error repeatedly greets you and want to get it fixed, read the article until the end.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this piece, we will explore everything there is to know about the Err_Tunnel_Connection_Failed warning message. What exactly is this error? What are the reasons why this error popped up in the first place? And most importantly \u2013 How to Fix the Err_Tunnel_Connection_Failed Error?<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/certera.com\/buy-ssl-certificates\"><img decoding=\"async\" width=\"960\" height=\"150\" sizes=\"(max-width: 960px) 100vw, 960px\" src=\"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/buy-cheap-ssl-certs-cta-jpg.webp\" alt=\"Buy SSL Cert CTA\" class=\"wp-image-2030\" srcset=\"https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/buy-cheap-ssl-certs-cta-jpg.webp 960w, https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/buy-cheap-ssl-certs-cta-300x47.webp 300w, https:\/\/certera.com\/kb\/wp-content\/uploads\/2024\/05\/buy-cheap-ssl-certs-cta-768x120.webp 768w\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What is the Err_Tunnel_Connection_Failed Error?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The err_tunnel_connection_failed error refers to an issue with the Domain Name System or proxy. This issue mainly occurs when the browser (in this case \u2013 Google Chrome) cannot establish a secure and encrypted connection with the web server due to problems with the tunnel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The err_tunnel_connection_failed error sometimes also denotes that the website the user is trying to visit or access is either down or moved to a new web address.\u00a0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Reasons Behind this Error?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This error mainly pops up because &#8211; Google Chrome cannot form a secure and encrypted connection with the web server. This happens due to problems with the tunnel. <strong>Apart from that, there are other reasons as well that can give rise to the err_tunnel_connection_failed warning message, such as:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Incorrect VPN configurations or proxy settings<\/li>\n\n\n\n<li>Interference from security software, like &#8211; antivirus and firewall<\/li>\n\n\n\n<li>Issue with local network equipment (example hub) or ISP<\/li>\n\n\n\n<li>Corrupted Google Chrome browser files or settings<\/li>\n\n\n\n<li>Incorrect proxy settings<\/li>\n\n\n\n<li>Incorrect VPN settings<\/li>\n\n\n\n<li>Corrupted cache, cookies, or browser data, etc.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the Err_Tunnel_Connection_Failed Error?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Seven (7) methods or techniques can be employed to get the err_tunnel_connection_failed error resolved. Start with the first method and in case, if it doesn\u2019t work move on to the subsequent (next) one. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>We are sure one of these seven methods or techniques listed below will fix the issue.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Method 1: &#8211;<\/strong> Disable Proxy Settings<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Method 2: &#8211;<\/strong> Update Network Settings<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Method 3: &#8211;<\/strong> Change Domain Name System Settings<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Method 4: &#8211;<\/strong> Clear Chrome\u2019s Cache &amp; History<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Method 5: &#8211;<\/strong> Temporarily Turn Off Chrome Extensions<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Method 6: &#8211;<\/strong> Reset Google Chrome Settings<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Method 7: &#8211;<\/strong> Update Google Chrome Browser<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Let\u2019s explore each of these methods in depth.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Method 1: &#8211; Disable Proxy Settings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Proxies are of great help as you can use them to protect your web privacy by masking your IP address. But sometimes proxies can also experience overloading issues or dead servers, which could lead to an error in the err_tunnel_connection_failed error. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hence, if you are facing an issue in discussion, it\u2019s better to disable the proxy settings and re-access the site.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to disable the proxy settings:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click <strong>Search<\/strong>, placed on the taskbar.<\/li>\n\n\n\n<li>Type <strong>Control Panel<\/strong> and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>The <strong>Control Panel<\/strong> window will appear.<\/li>\n\n\n\n<li>Under the <strong>Adjust your computer&#8217;s settings<\/strong> section, click <strong>Network and Internet<\/strong>.<\/li>\n\n\n\n<li>The <strong>Network and Internet<\/strong> window will appear.<\/li>\n\n\n\n<li>Click <strong>Internet Options<\/strong>.<\/li>\n\n\n\n<li>The <strong>Internet Properties<\/strong> window will appear.<\/li>\n\n\n\n<li>In <strong>the Internet Properties<\/strong> window, click the <strong>Connections<\/strong> tab.<\/li>\n\n\n\n<li>Under <strong>the Local Area Network (LAN) settings<\/strong> section, click <strong>the LAN settings<\/strong> button.<\/li>\n\n\n\n<li>The <strong>Local Area Network (LAN) Settings<\/strong> window will appear.<\/li>\n\n\n\n<li>In the <strong>Local Area Network (LAN) Settings<\/strong> window, in the <strong>Proxy server<\/strong> section, <strong>uncheck<\/strong> the checkbox placed adjacent to the <strong>Use a proxy server for your LAN (These settings will not apply to dial-up or VPN connections)<\/strong> option.<\/li>\n\n\n\n<li>Check the checkbox placed adjacent to the <strong>Automatically detect settings<\/strong> option.<\/li>\n\n\n\n<li>Click <strong>OK<\/strong>.<\/li>\n\n\n\n<li>Re-access the site.<\/li>\n\n\n\n<li>Verify whether the issue persists or not.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 2: &#8211; Update Network Settings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Due to outdated network setting the browser is unable to establish a secure and encrypted connection with the web server, giving rise to the err_tunnel_connection_failed warning message. Hence verify whether the network settings are up to date or not. If not, update them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to update the network settings:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click <strong>Search<\/strong>, placed on the taskbar.<\/li>\n\n\n\n<li>Type <strong>Command Prompt<\/strong>.<\/li>\n\n\n\n<li>Click <strong>Run<\/strong> <strong>as administrator<\/strong>.<\/li>\n\n\n\n<li>The <strong>User Account Control<\/strong> dialogue box will appear.<\/li>\n\n\n\n<li>Input the <strong>credentials<\/strong> and click <strong>Yes<\/strong>.<\/li>\n\n\n\n<li>The <strong>Administrator: Command Prompt<\/strong> window will appear.<\/li>\n\n\n\n<li>In the <strong>Administrator: Command Prompt <\/strong>window, perform the following actions:<ul><li>Type the <strong>IPCONFIG \/FLUSHDNS<\/strong> command.<\/li><\/ul><ul><li>Press <strong>Enter<\/strong>.<\/li><\/ul><ul><li>Type the <strong>NBSTAT \u2013R<\/strong> command.<\/li><\/ul><ul><li>Press <strong>Enter<\/strong>.<\/li><\/ul><ul><li>Type the <strong>NETSH INT IP RESET<\/strong> command.<\/li><\/ul><ul><li>Press <strong>Enter<\/strong>.<\/li><\/ul><ul><li>Type the <strong>NETSH WINSOCK RESET<\/strong> command.<\/li><\/ul>\n<ul class=\"wp-block-list\">\n<li>Press <strong>Enter<\/strong>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Restart<\/strong> the system.<\/li>\n\n\n\n<li>Re-access the site.<\/li>\n\n\n\n<li>Verify whether the error exits or not.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 3: &#8211; Change Domain Name System Settings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Change the Domain Name System settings to alter the path through which Google Chrome retrieves site data. You can also switch to another DNS server, like &#8211; Google&#8217;s Public DNS, as it will enable accurate and updated retrieval of the site\u2019s SSL cert.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to change the Domain Name System settings:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click <strong>Search<\/strong>, placed on the taskbar.<\/li>\n\n\n\n<li>Type <strong>Control Panel<\/strong> and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>The <strong>Control Panel <\/strong>window will appear.<\/li>\n\n\n\n<li>Click <strong>Network and Internet<\/strong>.<\/li>\n\n\n\n<li>The <strong>Network and Internet<\/strong> page will appear.<\/li>\n\n\n\n<li>In the <strong>Network and Internet<\/strong> page, click <strong>Network and Sharing Center<\/strong>.<\/li>\n\n\n\n<li>The <strong>Network and Sharing Center <\/strong>page will appear.<\/li>\n\n\n\n<li>In the left pane, click <strong>Change adapter settings<\/strong>.<\/li>\n\n\n\n<li>The <strong>Network Connections<\/strong> window will appear.<\/li>\n\n\n\n<li>In the Network Connections window, right-click on your connection.<\/li>\n\n\n\n<li>Select <strong>Properties<\/strong>.<\/li>\n\n\n\n<li>Double-click the <strong>Internet Protocol Version 4 (TCP\/IPv4)<\/strong> option.<\/li>\n\n\n\n<li>The <strong>Internet Protocol Version 4 (TCP\/IPv4)<\/strong> tab will appear.<\/li>\n\n\n\n<li>Click <strong>General<\/strong>.<\/li>\n\n\n\n<li>Check the checkbox placed in front of the <strong>Use the following DNS server addresses<\/strong> option.<\/li>\n\n\n\n<li>In the <strong>Preferred DNS<\/strong> server filed, type preferred DNS address (ex &#8211; 8.8.8.8)<\/li>\n\n\n\n<li>In the <strong>Alternate DNS<\/strong> server filed, type alternate DNS address (ex &#8211; 8.8.4.4)<\/li>\n\n\n\n<li>Check the checkbox placed adjacent to the <strong>Validate Settings<\/strong> option.<\/li>\n\n\n\n<li>Click <strong>OK<\/strong>.<\/li>\n\n\n\n<li><strong>Restart<\/strong> the system.<\/li>\n\n\n\n<li>Re-access the site.<\/li>\n\n\n\n<li>Verify whether the error exits or not.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 4: &#8211; Clear Chrome\u2019s Cache &amp; History<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Google Chrome stores data in its cache. It boosts page loading speed and provides the user with a personalized web experience. But, sometimes, outdated cache information can lead to connectivity issues, such as the err_tunnel_connection_failed error.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps given below to clear cookies and cached data:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open a fresh tab in <strong>Chrome<\/strong>.<\/li>\n\n\n\n<li>Click on the <strong>Customize and Control Google Chrome<\/strong> (three horizontal dots in the top right corner) icon.<\/li>\n\n\n\n<li>From the list, select <strong>Delete browsing data.<\/strong><\/li>\n\n\n\n<li>The<strong> Delete browsing data <\/strong>dialoguebox will appear.<\/li>\n\n\n\n<li>In the <strong>Delete browsing <\/strong>data dialogue box, perform the following actions:<\/li>\n\n\n\n<li>From the <strong>Time range<\/strong> list, select the duration. (preferred \u2013 <strong>All time<\/strong>)<\/li>\n\n\n\n<li>Check the checkbox placed adjacent to the <strong>Browsing history<\/strong> option.<\/li>\n\n\n\n<li>Check the checkbox placed adjacent to the <strong>Cookies and other site data<\/strong> option.<\/li>\n\n\n\n<li>Check the checkbox placed adjacent to the <strong>Cached images and files<\/strong> option.<\/li>\n\n\n\n<li>Click <strong>Clear data<\/strong>.<\/li>\n\n\n\n<li>Re-access the site.<\/li>\n\n\n\n<li>Verify whether the error exits or not.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 5: &#8211; Temporarily Turn Off Chrome Extensions<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Specific extensions can interfere with the Google Chrome browser and cause the err_tunnel_connection_failed error. To fix this, temporarily turn off or disable each extension individually to find the culprit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to temporarily turn off Chrome browser extensions individually:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open a fresh tab in Google Chrome.<\/li>\n\n\n\n<li>Click the <strong>Extension<\/strong> icon.<\/li>\n\n\n\n<li>Click Manage extensions.<\/li>\n\n\n\n<li>The Extensions page will appear.<\/li>\n\n\n\n<li>Turn the <strong>toggle button off<\/strong> of the extension that you want to temporarily disable.<\/li>\n\n\n\n<li>Re-access the site.<\/li>\n\n\n\n<li>Verify whether the error exits or not.<\/li>\n\n\n\n<li>If it does, repeat the process from &#8211; <strong>Step 2<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 6: &#8211; Reset Google Chrome Settings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sometimes, because of old or incorrect Chrome browser settings, the err_tunnel_connection_failed error can also pop up. Hence, it is best to reset the Chrome settings and then check whether the discussion issue persists.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to reset Google Chrome browser settings:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open a fresh tab in <strong>Google<\/strong> <strong>Chrome<\/strong>.<\/li>\n\n\n\n<li>Click on the <strong>Customize and control Google Chrome<\/strong> icon (three vertical dots).<\/li>\n\n\n\n<li>From the list, select <strong>Settings<\/strong>.<\/li>\n\n\n\n<li>The <strong>Settings<\/strong> page will appear.<\/li>\n\n\n\n<li>On the <strong>Settings<\/strong> page, in the left pane, click <strong>Reset settings<\/strong>.<\/li>\n\n\n\n<li>Under the <strong>Reset settings<\/strong> section, <strong>click Restore settings to their original defaults<\/strong>.<\/li>\n\n\n\n<li>The <strong>Reset settings?<\/strong> dialogue box will appear.<\/li>\n\n\n\n<li>In the <strong>Reset settings? <\/strong>dialogue box, click <strong>Reset settings<\/strong>.<\/li>\n\n\n\n<li>Re-access the site.<\/li>\n\n\n\n<li>Verify whether the error exits or not.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 7: &#8211; Update Google Chrome Browser<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If, for any reason, you haven\u2019t updated the Chrome browser and are still using an older version of Chrome, then it might be the reason why you are being greeted by the err_tunnel_connection_failed warning message again and again while trying to access a site. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To fix it, simply update the Google Chrome browser.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow the steps mentioned below to update the Google Chrome browser:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open a fresh tab in <strong>Google Chrome<\/strong>.<\/li>\n\n\n\n<li>Click on <strong>Customize and control Google Chrome<\/strong> icon (three vertical dots).<\/li>\n\n\n\n<li>From the list, select <strong>Help<\/strong>, and click <strong>About Google Chrome<\/strong>.<\/li>\n\n\n\n<li>The update will start automatically if it&#8217;s not the &#8211; <strong>latest version<\/strong>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Google Chrome is one of the most popular browsers users use (almost 65.38% as of June 2024). It is so because it is the fastest web browser as of now, and we all can agree on one thing \u2013 \u201cSpeed\u201d matters when it comes to browsing. Apart from that, various other features and timely patches<span class=\"morelink d-block mt-3\"><a href=\"https:\/\/certera.com\/kb\/how-to-fix-err-tunnel-connection-failed-error\/\">Read More<\/a><\/span><\/p>\n","protected":false},"author":5,"featured_media":2273,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[368],"class_list":["post-2272","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ssl-errors","tag-err-tunnel-connection-failed-error","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Resolve Err_Tunnel_Connection_Failed Error?<\/title>\n<meta name=\"description\" content=\"Understand what is Tunnel Connection Failed Error, What causes this error, how to fix Err Tunnel Connection Failed Error in Chrome.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/certera.com\/kb\/how-to-fix-err-tunnel-connection-failed-error\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Resolve Err_Tunnel_Connection_Failed Error?\" \/>\n<meta property=\"og:description\" content=\"Understand what is Tunnel Connection Failed Error, What causes this error, how to fix Err Tunnel Connection Failed Error in Chrome.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/certera.com\/kb\/how-to-fix-err-tunnel-connection-failed-error\/\" \/>\n<meta property=\"og:site_name\" content=\"Knowledge Base - 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