{"id":2654,"date":"2020-12-10T06:11:47","date_gmt":"2020-12-10T06:11:47","guid":{"rendered":"https:\/\/ubiq.co\/tech-blog\/?p=2654"},"modified":"2025-08-29T04:45:15","modified_gmt":"2025-08-29T04:45:15","slug":"how-to-disable-etags-in-apache-server","status":"publish","type":"post","link":"https:\/\/ubiq.co\/tech-blog\/how-to-disable-etags-in-apache-server\/","title":{"rendered":"How To Disable ETags in Apache Server"},"content":{"rendered":"\n<p>ETags are useful response headers that allow web servers to identify specific version of resource such as files, images &amp; videos. They help improve server performance and network bandwidth. But they can cause security issues for some websites, if not used properly. In some cases, you may even need to remove etag completely. In this article, we will look at how to disable ETags in Apache server.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/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:\/\/ubiq.co\/tech-blog\/how-to-disable-etags-in-apache-server\/#What_is_ETag\" >What is ETag?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ubiq.co\/tech-blog\/how-to-disable-etags-in-apache-server\/#How_To_Disable_ETags_in_Apache_Server\" >How To Disable ETags in Apache Server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ubiq.co\/tech-blog\/how-to-disable-etags-in-apache-server\/#1_Open_htaccess\" >1. Open .htaccess<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/ubiq.co\/tech-blog\/how-to-disable-etags-in-apache-server\/#2_Disable_ETag_header\" >2. Disable ETag header<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/ubiq.co\/tech-blog\/how-to-disable-etags-in-apache-server\/#Using_htaccess\" >Using .htaccess<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/ubiq.co\/tech-blog\/how-to-disable-etags-in-apache-server\/#Using_Apache_Configuration\" >Using Apache Configuration<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/ubiq.co\/tech-blog\/how-to-disable-etags-in-apache-server\/#3_Restart_Apache_web_server\" >3. Restart Apache web server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/ubiq.co\/tech-blog\/how-to-disable-etags-in-apache-server\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_ETag\"><\/span>What is ETag?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>ETag is a server response header that allows browsers to make conditional requests and perform cache validation efficiently. They are resource identifiers added by servers on website&#8217;s resources such as files, images, videos and more. This allows them to cache content more efficiently and save network bandwidth. For example, a server need not send full response correctly if the content has not changed. On the other hand, it poses security risks in case it gets leaked by your code, and can result in <a href=\"https:\/\/owasp.org\/www-community\/attacks\/Cache_Poisoning\" target=\"_blank\" rel=\"noreferrer noopener\">cache poisoning attack<\/a> on your website. So it is better to disable ETag if your website does not need it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_To_Disable_ETags_in_Apache_Server\"><\/span>How To Disable ETags in Apache Server<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>It is very easy to disable ETag in Apache server. We will need to use mod_rewrite module for this purpose.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Open_htaccess\"><\/span>1. Open .htaccess<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Before proceeding, please enable mod_rewrite (.htaccess) in your Apache web server. Open .htaccess file, typically located at \/var\/www\/html\/.htaccess<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">$ sudo vi \/var\/www\/html\/.htaccess<\/pre>\n\n\n\n<p>Please note, you can also make the following changes in your server&#8217;s main configuration file at \/etc\/apache2\/apache2.conf. But in many cases, the site administrator may not have access to main configuration file. Also, it is risky to modify this file unless absolutely necessary. Therefore, we strongly recommend enabling mod_rewrite on your Apache server and use .htaccess file for this purpose. Nevertheless, in the next step, we have described both ways to solve this problem &#8211; using .htaccess file as well as using configuration file.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Disable_ETag_header\"><\/span>2. Disable ETag header<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Using_htaccess\"><\/span>Using .htaccess<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Add the following two lines to your .htaccess file<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>&lt;IfModule mod_headers.c&gt; <\/code>\n    <code>Header unset ETag <\/code>\n<code>&lt;\/IfModule&gt; <\/code>\n<code>FileETag None<\/code><\/pre>\n\n\n\n<p>The above line uses Header Apache directive. Header unset basically removes the specific header. In our case, we want to remove ETag header so we add &#8216;Header unset Etag&#8217;. The FileEtag directive is used to create Etag response header when the response is due to a static file. We need to turn this off too.<\/p>\n\n\n\n<p>To re-enable ETag header just remove or comment the above lines.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Using_Apache_Configuration\"><\/span>Using Apache Configuration<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>If you have decided to modify your Apache configuration file instead of using .htaccess, then look for the Directory block for your site&#8217;s web document root. Add &#8216;FileTag None&#8217; directive to it.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">&lt;Directory ...&gt;<br>    Options Indexes FollowSymLinks<br>    AllowOverride None<br>    Require all granted<br><strong>    FileETag None<\/strong><br>&lt;\/Directory&gt;<\/pre>\n\n\n\n<p>Save and close the file.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Restart_Apache_web_server\"><\/span>3. Restart Apache web server<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Restart Apache web server to apply changes.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"># service httpd restart\nOR \n# systemctl restart httpd\nOR\n# sudo service apache2 restart<\/pre>\n\n\n\n<p>Use a <a href=\"https:\/\/hackertarget.com\/http-header-check\/\">third-party tool<\/a> to check if your server response still contains ETag header.<\/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\n<p>ETags are very handy for large websites that have many users and serve a large amount of content. ETags can make your server cache more efficient by clearly identifying each version of every resource and serving only that aspects of response that have been updated. If the resource is not updated, the cache will serve it thereby improving website performance and reducing network bandwidth. However, this can pose a security problem in some cases, such as if a website uses shared cache. Therefore, use it only if you absolutely need it. Otherwise, disable Etag on your site using the above steps.<\/p>\n\n\n\n<p><a href=\"http:\/\/ubiq.co\/\">Ubiq<\/a>&nbsp;makes it easy to visualize data in minutes, and monitor in real-time dashboards.&nbsp;<a href=\"http:\/\/ubiq.co\/accounts\/register\">Try it<\/a> today!<\/p>\n\n\n\n<p>Also read : <br><a href=\"https:\/\/ubiq.co\/tech-blog\/how-to-fix-414-request-uri-too-large-in-apache\/\">How to Fix 414 Request URI too large<\/a><br><a href=\"https:\/\/ubiq.co\/tech-blog\/apache-restrict-access-to-url-by-ip\/\">Apache Restrict Access to URL by IP<\/a><br><a href=\"https:\/\/ubiq.co\/tech-blog\/how-to-enable-http2-in-apache\/\">How to Enable HTTP2 in Apache<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here are the steps to disable ETags in Apache web server and improve website security. Prevent Etags from causing security issue by disabling it.<\/p>\n","protected":false},"author":1,"featured_media":2659,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[252],"class_list":["post-2654","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-apache","tag-disable-etag"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How To Disable ETags in Apache Server - Ubiq BI<\/title>\n<meta name=\"description\" content=\"Here are the steps to disable ETags in Apache web server and improve website security. 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