{"id":55112,"date":"2025-05-18T17:26:11","date_gmt":"2025-05-18T15:26:11","guid":{"rendered":"https:\/\/iode.tech\/?post_type=docs&#038;p=55112"},"modified":"2025-05-23T11:29:06","modified_gmt":"2025-05-23T09:29:06","password":"","slug":"dns-resolver","status":"publish","type":"docs","link":"https:\/\/iode.tech\/documentation\/dns-resolver\/","title":{"rendered":"DNS Resolver"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">How DNS Works on Android<\/h2>\n\n\n\n<p>By default, Android uses the DNS servers provided by your network via DHCP:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>On Wi-Fi:<\/strong> usually your router\u2019s or ISP\u2019s DNS servers.<\/li>\n\n\n\n<li><strong>On mobile data:<\/strong> your carrier\u2019s DNS servers.<\/li>\n<\/ul>\n\n\n\n<p>Android sends DNS queries to these servers to <strong>translate domain names<\/strong> (like <code>example.com<\/code>) into IP addresses.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DNS Fallback on Android<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If the <strong>primary DNS server<\/strong> doesn\u2019t respond or fails to resolve a domain, Android will try the <strong>secondary DNS servers<\/strong> provided by the network.<\/li>\n\n\n\n<li>As a last resort (though not officially documented), Android may attempt to use other known DNS servers like <strong>Google DNS (8.8.8.8)<\/strong>, depending on the device or manufacturer.<\/li>\n\n\n\n<li><strong>Note:<\/strong> The Android Open Source Project (AOSP) does <strong>not<\/strong> have a hardcoded fallback DNS; fallback behavior relies entirely on the DNS servers provided by your network.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Private DNS (DNS over TLS)<\/h3>\n\n\n\n<p>Since <strong>Android 9<\/strong>, you can enable <strong>Private DNS<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>When activated, Android sends DNS queries to a specified <strong>encrypted DNS provider<\/strong> (e.g., <code>dns.google<\/code>).<\/li>\n\n\n\n<li>If this Private DNS server becomes unreachable, Android <strong>falls back to the unencrypted DNS servers<\/strong> from the network.<\/li>\n\n\n\n<li>This ensures DNS resolution continues even if Private DNS fails, although temporarily without encryption.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">DNS in iod\u00e9OS<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">DNS Fallback in iod\u00e9OS<\/h3>\n\n\n\n<p>If the <strong>primary iod\u00e9 DNS server<\/strong> is unreachable or fails, iod\u00e9OS automatically switches to <strong>Quad9 Unblocked DNS<\/strong> (<code>9.9.9.10<\/code>).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why Quad9 Unblocked DNS?<\/h3>\n\n\n\n<p>Quad9 Unblocked DNS offers a balanced combination of <strong>security, privacy, and uncensored access<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Security:<\/strong> blocks access to known malicious domains (malware, phishing, etc.).<\/li>\n\n\n\n<li><strong>No censorship:<\/strong> does <strong>not block any legitimate websites<\/strong>, ensuring free internet access.<\/li>\n\n\n\n<li><strong>Privacy-respecting:<\/strong> does <strong>not log IP addresses or DNS queries<\/strong>.<\/li>\n\n\n\n<li><strong>Supports encryption:<\/strong> compatible with <strong>DNS over TLS (DoT)<\/strong> and <strong>DNS over HTTPS (DoH)<\/strong> to keep DNS queries private and secure.<\/li>\n\n\n\n<li><strong>Performance:<\/strong> backed by a global network for fast and reliable DNS resolution.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Summary<\/h3>\n\n\n\n<p>iod\u00e9OS strikes a balance between <strong>privacy, security, and freedom<\/strong> by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Prioritizing privacy-focused DNS.<\/li>\n\n\n\n<li>Falling back to Quad9 Unblocked when needed.<\/li>\n\n\n\n<li>Providing encrypted and uncensored DNS access.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>How DNS Works on Android By default, Android uses the DNS servers provided by your network via DHCP: Android sends DNS queries to these servers to translate domain names (like example.com) into IP addresses. DNS Fallback on Android Private DNS (DNS over TLS) Since Android 9, you can enable Private DNS: DNS in iod\u00e9OS DNS &#8230; <a title=\"DNS Resolver\" class=\"read-more\" href=\"https:\/\/iode.tech\/documentation\/dns-resolver\/\" aria-label=\"Read more about DNS Resolver\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[101],"doc_tag":[],"class_list":["post-55112","docs","type-docs","status-publish","hentry","doc_category-system-and-technologies"],"year_month":"2026-04","word_count":330,"total_views":0,"reactions":{"happy":0,"normal":0,"sad":0},"author_info":{"name":"antoine","author_nicename":"antoine","author_url":"https:\/\/iode.tech\/author\/antoine\/"},"doc_category_info":[{"term_name":"System and Technologies","term_url":"https:\/\/iode.tech\/documentation-category\/system-and-technologies\/"}],"doc_tag_info":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DNS Resolver - iod\u00e9<\/title>\n<meta name=\"description\" content=\"If the primary iod\u00e9 DNS server is unreachable or fails, iod\u00e9OS falls back to Quad9 Unblocked DNS (9.9.9.10). Quad9 Unblocked DNS provides strong security by blocking access to known malicious domains such as those used for malware, phishing, and other cyber threats.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/iode.tech\/documentation\/dns-resolver\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DNS Resolver - iod\u00e9\" \/>\n<meta property=\"og:description\" content=\"If the primary iod\u00e9 DNS server is unreachable or fails, iod\u00e9OS falls back to Quad9 Unblocked DNS (9.9.9.10). 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