{"id":53403,"date":"2020-03-05T08:28:20","date_gmt":"2020-03-05T13:28:20","guid":{"rendered":"https:\/\/www.inmotionhosting.com\/support\/?p=53403"},"modified":"2021-11-19T01:23:53","modified_gmt":"2021-11-19T06:23:53","slug":"dns-over-https-encrypted-sni-in-firefox","status":"publish","type":"post","link":"https:\/\/www.inmotionhosting.com\/support\/security\/dns-over-https-encrypted-sni-in-firefox\/","title":{"rendered":"How to Enable DNS-over-HTTPS and Encrypted SNI in Firefox"},"content":{"rendered":"<p>Starting in Firefox 73, users can easily use DNS-over-HTTPS (DoH) and Encrypted Server Name Indication (SNI) for better privacy without extra software. These newer DNS security features help protect user privacy during web activity. <\/p>\n\n\n\n<p><strong>What is DNS-over-<\/strong><strong>HTTPS<\/strong><strong> (<\/strong><strong>DoH<\/strong><strong>)?<\/strong> DoH encrypts DNS traffic with HTTPS (port 443) and HTTP\/2 and requires authentication of the requested server.<\/p>\n\n\n\n<p><strong>DNS-over-HTTPS (DoH) or DNS-over-TLS (DoT)?<\/strong> Each handles DNS differently. DoT uses a dedicated port (853) for DNS queries over TLS but <em>doesn\u2019t require<\/em> the user system to authenticate the requested server. DoT is easy to block because although you won\u2019t see the encrypted traffic, it\u2019s using a dedicated port. DNS-over-HTTPS (DoH) travels alongside other SSL connections and has more support than DNS-over-TLS (DoT). Learn more about <a href=\"https:\/\/support.mozilla.org\/en-US\/kb\/dns-over-https-doh-faqs#w_why-is-firefox-implementing-doh-and-not-dot\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">why Firefox implemented DoH instead of DoT<\/a>.<\/p>\n\n\n\n<p class=\"alert alert-danger\">There are cybersecurity and enterprise professionals concerned about whether DoH actually improves internet security and\/or adds issues that negate its benefits. Learn more about the concerns with DoH and DoT at <a rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\" href=\"https:\/\/www.thesslstore.com\/blog\/dns-over-tls-vs-dns-over-https\/\" target=\"_blank\">SSLStore.com<\/a>.<\/p>\n\n\n\n<p class=\"alert alert-warning\">DoH can negatively affect the performance of some content delivery networks (CDNs) including Cloudflare and MaxCDN.<\/p>\n\n\n\n<p><strong>What is Encrypted SNI?<\/strong> The Server Name Indication (SNI) shares the hostname for outgoing TLS connections in plain-text. Encrypting SNI is another way to <a href=\"https:\/\/www.inmotionhosting.com\/blog\/6-ways-to-secure-your-web-activity-from-your-computer\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">secure your web activity<\/a> from man-in-the-middle (MITM) attacks. Encrypted SNI is enabled by default with the Cloudflare DNS resolver.<\/p>\n\n\n\n<p class=\"alert alert-danger\">You should note your current settings before changing anything. Some changes may affect connectivity to your local network resources. Check your internet access after changing each setting to help you troubleshoot any issues you have.<\/p>\n\n\n\n<p>Below, we cover:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"#doh\">DNS-over-HTTPS (DoH)<\/a><\/li><li><a href=\"#sni\">Encrypted Server Name Indication (SNI)<\/a><\/li><li><a href=\"#dnssec\">DNS Security Extensions (DNSSEC)<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"doh\">DNS-over-HTTPS (DoH)<\/h2>\n\n\n\n<p>There are two ways to enable DoH in Firefox:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"menu\">Preferences Menu<\/h3>\n\n\n\n<p>The easiest, preferred option is to use the browser preferences menu.<\/p>\n\n\n\n<ol class=\"article_list wp-block-list\"><li>Open your Firefox Preferences page<\/li><li>Under <em>Network Settings<\/em>, select <strong>Settings<\/strong><\/li><li>Check <strong>Enable DNS over HTTPS<\/strong><\/li><li>(Optional) Change your default DNS provider from Cloudflare to NextDNS or Custom (e.g. QuadDNS, Quad101, or another resolver listed in the <a href=\"https:\/\/github.com\/curl\/curl\/wiki\/DNS-over-HTTPS\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">curl Github page<\/a> or <a href=\"https:\/\/kb.adguard.com\/en\/general\/dns-providers\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">AdGuard listing<\/a>)<\/li><li>Select <strong>OK<\/strong><\/li><\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"config\">about:config<\/h3>\n\n\n\n<p>For more advanced options, you can edit the Firefox configuration file directly.<\/p>\n\n\n\n<ol class=\"article_list wp-block-list\"><li>Navigate to <code>about:config<\/code><\/li><li>Type <code>network.trr.uri<\/code><\/li><li>Replace the URI with your preferred DNS resolver<\/li><li>Select the checkmark icon on the right<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"trr\">Trusted Recursive Resolver<\/h2>\n\n\n\n<p>Enabling <a href=\"https:\/\/wiki.mozilla.org\/Security\/DOH-resolver-policy\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">Trusted Recursive Resolver (TRR) mode<\/a> affects how Firefox switches between DNS resolvers <em>to improve DNS-over-HTTPS (DoH)<\/em>. This is off by default.<\/p>\n\n\n\n<ol class=\"article_list wp-block-list\"><li>From <code>about:config<\/code>, type <code>network.trr.mode<\/code><\/li><li>Select the edit button on the right<\/li><li>Change the setting to one listed below and select the checkmark on the right<\/li><\/ol>\n\n\n\n<ul class=\"wp-block-list\"><li>0 \u2013 <strong>TRR off<\/strong>, only native DNS resolving (default)<\/li><li>2 \u2013 <strong>Try TRR first<\/strong>, and use native resolver as a fallback (recommended)<\/li><li>3 \u2013 <strong>Only use TRR<\/strong>, requires bootstrapAddress pref to be set in version 73 and lower; version 74 bootstraps browser using native resolver, unless the DoH server domain can\u2019t be resolved \u2013 <a href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1593873\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">Bug 1593873<\/a> regards portal detection and telemetry (most strict)<\/li><li>5 \u2013 <strong>TRR off by choice<\/strong>, similar to 0 but marked as by choice<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sni\">Encrypted SNI<\/h2>\n\n\n\n<ol class=\"wp-block-list\"><li>In your browser, navigate to <code>about:config<\/code>;<\/li><li>Type <code>network.security.esni.enabled<\/code><\/li><li>Select the toggle button to the right of <em>false<\/em> to <em>true<\/em><\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"dnssec\">DNSSEC<\/h2>\n\n\n\n<p>While DoH is DNS encrypted in port 443, DNSSEC is a protocol extension to ensure the query hasn\u2019t suffered from DNS poisoning. Ideally, DNSSEC and DoH would work together to improve user privacy. <\/p>\n\n\n\n<p>There are two sides to DNSSEC support \u2013 user-side verification and server-side support.<\/p>\n\n\n\n<p><strong>As an internet user<\/strong>, your internet service provider (ISP) may use DNS Security Extensions (DNSSEC) already. If not, there are ways to use a DNS resolver that does DNSSEC validation:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Change your router DNS settings<\/li><li>Install DNS configuration software \u2013 e.g. <a href=\"https:\/\/www.sordum.org\/7952\/dns-jumper-v2-1\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">DNS Jumper<\/a> or <a href=\"https:\/\/www.nlnetlabs.nl\/projects\/dnssec-trigger\/about\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">DNS-Trigger<\/a><\/li><li>Use a <a href=\"https:\/\/www.inmotionhosting.com\/blog\/6-ways-to-secure-your-web-activity-from-your-computer\/#2\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\">Virtual private network (VPN)<\/a> \u2013 e.g. NordVPN, TunnelBear, and Private Internet Access (PIA)<\/li><\/ul>\n\n\n\n<p><strong>As a server administrator<\/strong>, you should enable support for <a href=\"https:\/\/www.inmotionhosting.com\/support\/product-guides\/vps-hosting\/dnssec-managed-vps-dedicated\/\">DNSSEC on Managed VPS \/ Dedicated servers<\/a> or with <a href=\"https:\/\/www.inmotionhosting.com\/support\/edu\/cpanel\/enable-dnssec-cloudflare\/\">Cloudflare<\/a>.<\/p>\n\n\n\n<p class=\"alert alert-info\">You can test your DNS security settings at <a rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\" href=\"https:\/\/www.cloudflare.com\/ssl\/encrypted-sni\/\" target=\"_blank\">Cloudflare.com\/ssl\/encrypted-sni<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"319\" src=\"https:\/\/www.inmotionhosting.com\/support\/wp-content\/uploads\/2020\/03\/cloudflare-dns-security-testing-1024x319.png\" alt=\"\" class=\"wp-image-53406\" srcset=\"https:\/\/www.inmotionhosting.com\/support\/wp-content\/uploads\/2020\/03\/cloudflare-dns-security-testing-1024x319.png 1024w, https:\/\/www.inmotionhosting.com\/support\/wp-content\/uploads\/2020\/03\/cloudflare-dns-security-testing-300x93.png 300w, https:\/\/www.inmotionhosting.com\/support\/wp-content\/uploads\/2020\/03\/cloudflare-dns-security-testing-768x239.png 768w, https:\/\/www.inmotionhosting.com\/support\/wp-content\/uploads\/2020\/03\/cloudflare-dns-security-testing.png 1104w\" sizes=\"auto, (min-width: 1360px) 876px, (min-width: 960px) calc(61.58vw + 51px), calc(100vw - 80px)\" \/><figcaption>Common results for the DNS security test.<\/figcaption><\/figure>\n\n\n\n<p>Improve your server security with these 10 ways to harden your VPS. Or enhance your brand with these <a href=\"https:\/\/www.inmotionhosting.com\/blog\/5-web-hosting-new-years-resolutions-for-2020\/\">5 Web Hosting New Year\u2019s Resolutions for 2020<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Starting in Firefox 73, users can easily use DNS-over-HTTPS (DoH) and Encrypted Server Name Indication (SNI) for better privacy without extra software. These newer DNS security features help protect user privacy during web activity. What is DNS-over-HTTPS (DoH)? DoH encrypts DNS traffic with HTTPS (port 443) and HTTP\/2 and requires authentication of the requested server.<a class=\"moretag\" href=\"https:\/\/www.inmotionhosting.com\/support\/security\/dns-over-https-encrypted-sni-in-firefox\/\"> Read More ><\/a><\/p>\n","protected":false},"author":57014,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4299],"tags":[],"class_list":["post-53403","post","type-post","status-publish","format-standard","hentry","category-security"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DNS-over-HTTPS (DoH) and Encrypted SNI in Firefox | InMotion Hosting<\/title>\n<meta name=\"description\" content=\"Learn how to enable multiple types of DNS security - DNS-over-HTTPS (DoH), TRR DNS Resolver mode, Encrypted Server Name Indication (SNI), and DNSSEC in the Firefox internet browser.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.inmotionhosting.com\/support\/security\/dns-over-https-encrypted-sni-in-firefox\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DNS-over-HTTPS (DoH) and Encrypted SNI in Firefox | InMotion Hosting\" \/>\n<meta property=\"og:description\" content=\"Learn how to enable multiple types of DNS security - 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