{"id":3860,"date":"2024-09-10T00:24:04","date_gmt":"2024-09-10T00:24:04","guid":{"rendered":"https:\/\/zynoo.com\/blog\/dns-server-not-responding\/"},"modified":"2026-10-28T16:43:26","modified_gmt":"2026-10-28T16:43:26","slug":"dns-server-not-responding","status":"publish","type":"post","link":"https:\/\/zynoo.com\/blog\/vi\/dns-server-not-responding\/","title":{"rendered":"M\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i? 7 c\u00e1ch kh\u1eafc ph\u1ee5c"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\" id=\"h-\">L\u1ed7i <strong>m\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i<\/strong> xu\u1ea5t hi\u1ec7n khi thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i t\u1eeb m\u00e1y ch\u1ee7 DNS ch\u1ecbu tr\u00e1ch nhi\u1ec7m ph\u00e2n gi\u1ea3i \u0111\u1ecba ch\u1ec9 website. B\u1ea1n v\u1eabn c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i Wi-Fi, nh\u01b0ng c\u00e1c website kh\u00f4ng t\u1ea3i \u0111\u01b0\u1ee3c v\u00ec m\u00e1y t\u00ednh kh\u00f4ng th\u1ec3 tra c\u1ee9u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ch\u00fang.<\/p>\n\n<p class=\"wp-block-paragraph\">V\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn, nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP), c\u00e0i \u0111\u1eb7t DNS kh\u00f4ng ch\u00ednh x\u00e1c ho\u1eb7c ph\u1ea7n m\u1ec1m g\u00e2y c\u1ea3n tr\u1edf c\u00e1c y\u00eau c\u1ea7u m\u1ea1ng.<\/p>\n\n<p class=\"wp-block-paragraph\">May m\u1eafn l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 ch\u1ea9n \u0111o\u00e1n h\u1ea7u h\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ebft n\u1ed1i DNS m\u00e0 kh\u00f4ng c\u1ea7n ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt chuy\u00ean s\u00e2u. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3y c\u00e1ch kh\u1eafc ph\u1ee5c thi\u1ebft th\u1ef1c d\u00e0nh cho Windows v\u00e0 macOS.<\/p>\n\n<h2 id=\"h-what-does-dns-server-not-responding-mean\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"May_chu_DNS_khong_phan_hoi_nghia_la_gi\"><\/span>M\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i ngh\u0129a l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n (DNS) chuy\u1ec3n \u0111\u1ed5i t\u00ean website, ch\u1eb3ng h\u1ea1n nh\u01b0 <code>google.com<\/code>, th\u00e0nh \u0111\u1ecba ch\u1ec9 IP m\u00e0 m\u00e1y t\u00ednh s\u1eed d\u1ee5ng \u0111\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i.<\/p>\n\n<p class=\"wp-block-paragraph\">Khi b\u1ea1n nh\u1eadp \u0111\u1ecba ch\u1ec9 website, thi\u1ebft b\u1ecb s\u1ebd y\u00eau c\u1ea7u m\u1ed9t tr\u00ecnh ph\u00e2n gi\u1ea3i DNS t\u00ecm \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu tr\u00ecnh ph\u00e2n gi\u1ea3i kh\u00f4ng ph\u1ea3n h\u1ed3i trong th\u1eddi gian d\u1ef1 ki\u1ebfn, tr\u00ecnh duy\u1ec7t ho\u1eb7c h\u1ec7 \u0111i\u1ec1u h\u00e0nh c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 b\u00e1o l\u1ed7i DNS.<\/p>\n\n<p class=\"wp-block-paragraph\">C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u1ed3m:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS kh\u00f4ng kh\u1ea3 d\u1ee5ng ho\u1eb7c b\u1ecb qu\u00e1 t\u1ea3i.<\/li>\n\n\n\n<li>S\u1ef1 c\u1ed1 v\u1edbi b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn ho\u1eb7c k\u1ebft n\u1ed1i Internet.<\/li>\n\n\n\n<li>C\u1ea5u h\u00ecnh DNS kh\u00f4ng ch\u00ednh x\u00e1c.<\/li>\n\n\n\n<li>Th\u00f4ng tin DNS \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee5c b\u1ed9 \u0111\u00e3 l\u1ed7i th\u1eddi.<\/li>\n\n\n\n<li>VPN, proxy ho\u1eb7c ph\u1ea7n m\u1ec1m b\u1ea3o m\u1eadt g\u00e2y c\u1ea3n tr\u1edf.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec3m kh\u00e1c bi\u1ec7t quan tr\u1ecdng:<\/strong> M\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i kh\u00e1c v\u1edbi tr\u01b0\u1eddng h\u1ee3p t\u00ean mi\u1ec1n kh\u00f4ng t\u1ed3n t\u1ea1i. X\u00e1c \u0111\u1ecbnh \u0111\u00fang v\u1ea5n \u0111\u1ec1 b\u1ea1n \u0111ang g\u1eb7p ph\u1ea3i s\u1ebd gi\u00fap tr\u00e1nh nh\u1eefng b\u01b0\u1edbc kh\u1eafc ph\u1ee5c kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2024\/09\/DNS-Server-Not-responding-1-1024x576.webp\" alt=\"M\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i\" class=\"wp-image-3717\" srcset=\"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2024\/09\/DNS-Server-Not-responding-1-1024x576.webp 1024w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2024\/09\/DNS-Server-Not-responding-1-300x169.webp 300w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2024\/09\/DNS-Server-Not-responding-1-768x432.webp 768w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2024\/09\/DNS-Server-Not-responding-1-1536x864.webp 1536w, https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2024\/09\/DNS-Server-Not-responding-1.webp 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<h2 id=\"h-how-to-fix-dns-server-not-responding\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cach_khac_phuc_loi_may_chu_DNS_khong_phan_hoi\"><\/span>C\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i m\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">H\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng nh\u1eefng b\u01b0\u1edbc ki\u1ec3m tra \u0111\u01a1n gi\u1ea3n tr\u01b0\u1edbc khi thay \u0111\u1ed5i c\u00e0i \u0111\u1eb7t m\u1ea1ng.<\/p>\n\n<h3 id=\"h-1-check-your-internet-connection\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Kiem_tra_ket_noi_Internet\"><\/span>1. Ki\u1ec3m tra k\u1ebft n\u1ed1i Internet<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc ti\u00ean, h\u00e3y x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 ch\u1ec9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ed9t website hay to\u00e0n b\u1ed9 k\u1ebft n\u1ed1i Internet c\u1ee7a b\u1ea1n.<\/p>\n\n<p class=\"wp-block-paragraph\">Th\u1eed m\u1edf m\u1ed9t s\u1ed1 website ph\u1ed5 bi\u1ebfn. N\u1ebfu kh\u00f4ng website n\u00e0o t\u1ea3i \u0111\u01b0\u1ee3c, h\u00e3y ki\u1ec3m tra k\u1ebft n\u1ed1i tr\u00ean m\u1ed9t thi\u1ebft b\u1ecb kh\u00e1c.<\/p>\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i m\u00e1y t\u00ednh v\u1edbi m\u1ed9t m\u1ea1ng kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111i\u1ec3m ph\u00e1t s\u00f3ng di \u0111\u1ed9ng.<\/p>\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng b\u01b0\u1edbc ki\u1ec3m tra n\u00e0y cung c\u1ea5p manh m\u1ed1i h\u1eefu \u00edch:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>T\u1ea5t c\u1ea3 thi\u1ebft b\u1ecb \u0111\u1ec1u b\u1ecb \u1ea3nh h\u01b0\u1edfng:<\/strong> Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 n\u1eb1m \u1edf b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn, ISP ho\u1eb7c tr\u00ecnh ph\u00e2n gi\u1ea3i DNS \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh.<\/li>\n\n\n\n<li><strong>Ch\u1ec9 m\u1ed9t thi\u1ebft b\u1ecb b\u1ecb \u1ea3nh h\u01b0\u1edfng:<\/strong> H\u00e3y ki\u1ec3m tra c\u00e0i \u0111\u1eb7t DNS v\u00e0 m\u1ea1ng tr\u00ean thi\u1ebft b\u1ecb \u0111\u00f3.<\/li>\n\n\n\n<li><strong>Ch\u1ec9 m\u1ed9t website b\u1ecb \u1ea3nh h\u01b0\u1edfng:<\/strong> C\u1ea5u h\u00ecnh DNS c\u1ee7a t\u00ean mi\u1ec1n \u0111\u00f3 c\u00f3 th\u1ec3 kh\u00f4ng ch\u00ednh x\u00e1c.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu k\u1ebft n\u1ed1i Internet ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng tr\u00ean m\u1ea1ng kh\u00e1c, h\u00e3y t\u1eadp trung ki\u1ec3m tra m\u1ea1ng ban \u0111\u1ea7u tr\u01b0\u1edbc khi thay \u0111\u1ed5i c\u00e0i \u0111\u1eb7t m\u00e1y t\u00ednh.<\/p>\n\n<h3 id=\"h-2-restart-your-router-and-computer\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Khoi_dong_lai_bo_dinh_tuyen_va_may_tinh\"><\/span>2. Kh\u1edfi \u0111\u1ed9ng l\u1ea1i b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 m\u00e1y t\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">S\u1ef1 c\u1ed1 t\u1ea1m th\u1eddi v\u1edbi <a href=\"https:\/\/en.wikipedia.org\/wiki\/Router_(computing)\">b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/a> ho\u1eb7c m\u1ea1ng \u0111\u00f4i khi c\u00f3 th\u1ec3 l\u00e0m gi\u00e1n \u0111o\u1ea1n li\u00ean l\u1ea1c DNS.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y th\u1eed kh\u1edfi \u0111\u1ed9ng l\u1ea1i theo c\u00e1c b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n sau:<\/p>\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>T\u1eaft b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 modem n\u1ebfu \u0111\u00f3 l\u00e0 hai thi\u1ebft b\u1ecb ri\u00eang bi\u1ec7t.<\/li>\n\n\n\n<li>Ch\u1edd kho\u1ea3ng 30 gi\u00e2y.<\/li>\n\n\n\n<li>C\u1eafm l\u1ea1i ngu\u1ed3n v\u00e0 \u0111\u1ee3i m\u1ea1ng ho\u1ea1t \u0111\u1ed9ng tr\u1edf l\u1ea1i.<\/li>\n\n\n\n<li>Kh\u1edfi \u0111\u1ed9ng l\u1ea1i m\u00e1y t\u00ednh v\u00e0 ki\u1ec3m tra website m\u1ed9t l\u1ea7n n\u1eefa.<\/li>\n<\/ol>\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 ng\u1eaft k\u1ebft n\u1ed1i r\u1ed3i k\u1ebft n\u1ed1i l\u1ea1i Wi-Fi.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>\u0110\u1eebng d\u00f9ng n\u00fat kh\u00f4i ph\u1ee5c c\u00e0i \u0111\u1eb7t g\u1ed1c tr\u00ean b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn.<\/strong> Kh\u1edfi \u0111\u1ed9ng l\u1ea1i th\u00f4ng th\u01b0\u1eddng l\u00e0 \u0111\u1ee7 cho b\u01b0\u1edbc ki\u1ec3m tra n\u00e0y v\u00e0 s\u1ebd kh\u00f4ng x\u00f3a c\u1ea5u h\u00ecnh m\u1ea1ng \u0111\u00e3 l\u01b0u.<\/p>\n\n<h3 id=\"h-3-test-your-dns-server-with-nslookup\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Kiem_tra_may_chu_DNS_bang_nslookup\"><\/span>3. Ki\u1ec3m tra m\u00e1y ch\u1ee7 DNS b\u1eb1ng nslookup<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi \u0111\u1ed5i nh\u00e0 cung c\u1ea5p DNS, h\u00e3y ki\u1ec3m tra xem tr\u00ecnh ph\u00e2n gi\u1ea3i DNS \u0111ang \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh c\u00f3 ph\u1ea3n h\u1ed3i c\u00e1c y\u00eau c\u1ea7u hay kh\u00f4ng.<\/p>\n\n<p class=\"wp-block-paragraph\">Tr\u00ean Windows, m\u1edf Command Prompt ho\u1eb7c PowerShell v\u00e0 ch\u1ea1y:<\/p>\n\n<pre class=\"wp-block-code\"><code><code>nslookup google.com<\/code><\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Thao t\u00e1c n\u00e0y y\u00eau c\u1ea7u tr\u00ecnh ph\u00e2n gi\u1ea3i DNS \u0111ang \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh tra c\u1ee9u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a Google.<\/p>\n\n<p class=\"wp-block-paragraph\">Ti\u1ebfp theo, so s\u00e1nh k\u1ebft qu\u1ea3 b\u1eb1ng tr\u00ecnh ph\u00e2n gi\u1ea3i DNS c\u00f4ng c\u1ed9ng c\u1ee7a Cloudflare:<\/p>\n\n<pre class=\"wp-block-code\"><code><code>nslookup google.com 1.1.1.1<\/code><\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu l\u1ec7nh \u0111\u1ea7u ti\u00ean h\u1ebft th\u1eddi gian ch\u1edd nh\u01b0ng l\u1ec7nh th\u1ee9 hai th\u00e0nh c\u00f4ng, tr\u00ecnh ph\u00e2n gi\u1ea3i DNS hi\u1ec7n t\u1ea1i ho\u1eb7c \u0111\u01b0\u1eddng truy\u1ec1n m\u1ea1ng \u0111\u1ebfn tr\u00ecnh ph\u00e2n gi\u1ea3i \u0111\u00f3 c\u00f3 th\u1ec3 \u0111ang g\u1eb7p s\u1ef1 c\u1ed1.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu c\u1ea3 hai \u0111\u1ec1u th\u1ea5t b\u1ea1i, h\u00e3y ki\u1ec3m tra k\u1ebft n\u1ed1i Internet, t\u01b0\u1eddng l\u1eeda ho\u1eb7c c\u00e1c h\u1ea1n ch\u1ebf m\u1ea1ng.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu ph\u1ea3n h\u1ed3i cho bi\u1ebft t\u00ean mi\u1ec1n kh\u00f4ng t\u1ed3n t\u1ea1i, \u0111\u00f3 l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 DNS kh\u00e1c v\u1edbi l\u1ed7i h\u1ebft th\u1eddi gian ch\u1edd.<\/p>\n\n<p class=\"wp-block-paragraph\">L\u1ec7nh <code>nslookup<\/code> c\u0169ng h\u1eefu \u00edch cho qu\u1ea3n tr\u1ecb vi\u00ean website c\u1ea7n x\u00e1c minh c\u00e1c b\u1ea3n ghi DNS.<\/p>\n\n<h3 id=\"h-4-flush-your-dns-cache\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Xoa_bo_nho_dem_DNS\"><\/span>4. X\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m DNS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">M\u00e1y t\u00ednh c\u1ee7a b\u1ea1n t\u1ea1m th\u1eddi l\u01b0u k\u1ebft qu\u1ea3 tra c\u1ee9u DNS \u0111\u1ec3 t\u0103ng t\u1ed1c c\u00e1c y\u00eau c\u1ea7u sau n\u00e0y.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0110\u00f4i khi, th\u00f4ng tin \u0111\u00e3 l\u1ed7i th\u1eddi trong b\u1ed9 nh\u1edb \u0111\u1ec7m g\u00f3p ph\u1ea7n g\u00e2y ra s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Tr\u00ean Windows:<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">M\u1edf Command Prompt v\u00e0 ch\u1ea1y:<\/p>\n\n<pre class=\"wp-block-code\"><code><code>ipconfig \/flushdns<\/code><\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Windows s\u1ebd x\u00e1c nh\u1eadn r\u1eb1ng b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a tr\u00ecnh ph\u00e2n gi\u1ea3i DNS \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00f3a.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Tr\u00ean macOS:<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">M\u1edf Terminal v\u00e0 ch\u1ea1y:<\/p>\n\n<pre class=\"wp-block-code\"><code><code>sudo dscacheutil -flushcache<\/code><\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Sau \u0111\u00f3:<\/p>\n\n<pre class=\"wp-block-code\"><code><code>sudo killall -HUP mDNSResponder<\/code><\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">Nh\u1eadp m\u1eadt kh\u1ea9u qu\u1ea3n tr\u1ecb vi\u00ean n\u1ebfu \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<\/p>\n\n<p class=\"wp-block-paragraph\">Sau \u0111\u00f3, m\u1edf l\u1ea1i tr\u00ecnh duy\u1ec7t v\u00e0 ki\u1ec3m tra website.<\/p>\n\n<p class=\"wp-block-paragraph\">X\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m DNS nh\u00ecn chung l\u00e0 an to\u00e0n, nh\u01b0ng s\u1ebd kh\u00f4ng kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c t\u00ecnh tr\u1ea1ng m\u00e1y ch\u1ee7 DNS th\u01b0\u1ee3ng ngu\u1ed3n kh\u00f4ng kh\u1ea3 d\u1ee5ng ho\u1eb7c c\u00e1c b\u1ea3n ghi kh\u00f4ng ch\u00ednh x\u00e1c tr\u00ean m\u00e1y ch\u1ee7 t\u00ean c\u1ee7a ch\u1ee7 s\u1edf h\u1eefu website.<\/p>\n\n<h3 id=\"h-5-change-your-dns-server\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Thay_doi_may_chu_DNS\"><\/span>5. Thay \u0111\u1ed5i m\u00e1y ch\u1ee7 DNS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu tr\u00ecnh ph\u00e2n gi\u1ea3i DNS hi\u1ec7n t\u1ea1i kh\u00f4ng kh\u1ea3 d\u1ee5ng, chuy\u1ec3n sang m\u1ed9t d\u1ecbch v\u1ee5 DNS c\u00f4ng c\u1ed9ng \u0111\u00e1ng tin c\u1eady c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n truy c\u1eadp l\u1ea1i website.<\/p>\n\n<p class=\"wp-block-paragraph\">Hai l\u1ef1a ch\u1ecdn th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0:<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Nh\u00e0 cung c\u1ea5p<\/th><th>DNS ch\u00ednh<\/th><th>DNS ph\u1ee5<\/th><\/tr><tr><td>Cloudflare<\/td><td><code>1.1.1.1<\/code><\/td><td><code>1.0.0.1<\/code><\/td><\/tr><tr><td>Google Public DNS<\/td><td><code>8.8.8.8<\/code><\/td><td><code>8.8.4.4<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h4 id=\"h-change-dns-on-windows-11\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thay_doi_DNS_tren_Windows_11\"><\/span>Thay \u0111\u1ed5i DNS tr\u00ean Windows 11<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>M\u1edf <strong>C\u00e0i \u0111\u1eb7t \u2192 M\u1ea1ng &amp; Internet<\/strong>.<\/li>\n\n\n\n<li>Ch\u1ecdn k\u1ebft n\u1ed1i Wi-Fi ho\u1eb7c Ethernet \u0111ang ho\u1ea1t \u0111\u1ed9ng.<\/li>\n\n\n\n<li>T\u00ecm <strong>Ch\u1ec9 \u0111\u1ecbnh m\u00e1y ch\u1ee7 DNS<\/strong> v\u00e0 nh\u1ea5p v\u00e0o <strong>Ch\u1ec9nh s\u1eeda<\/strong>.<\/li>\n\n\n\n<li>Chuy\u1ec3n c\u00e0i \u0111\u1eb7t t\u1eeb T\u1ef1 \u0111\u1ed9ng sang Th\u1ee7 c\u00f4ng.<\/li>\n\n\n\n<li>B\u1eadt IPv4 v\u00e0 nh\u1eadp \u0111\u1ecba ch\u1ec9 DNS \u01b0u ti\u00ean c\u00f9ng \u0111\u1ecba ch\u1ec9 DNS thay th\u1ebf.<\/li>\n\n\n\n<li>L\u01b0u thay \u0111\u1ed5i v\u00e0 ki\u1ec3m tra k\u1ebft n\u1ed1i.<\/li>\n<\/ol>\n\n<h4 id=\"h-change-dns-on-macos\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thay_doi_DNS_tren_macOS\"><\/span>Thay \u0111\u1ed5i DNS tr\u00ean macOS<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>M\u1edf <strong>C\u00e0i \u0111\u1eb7t h\u1ec7 th\u1ed1ng \u2192 M\u1ea1ng<\/strong>.<\/li>\n\n\n\n<li>Ch\u1ecdn k\u1ebft n\u1ed1i m\u1ea1ng \u0111ang ho\u1ea1t \u0111\u1ed9ng.<\/li>\n\n\n\n<li>Nh\u1ea5p v\u00e0o <strong>Chi ti\u1ebft \u2192 DNS<\/strong>.<\/li>\n\n\n\n<li>Th\u00eam c\u00e1c \u0111\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7 DNS b\u1ea1n mu\u1ed1n s\u1eed d\u1ee5ng.<\/li>\n\n\n\n<li>\u00c1p d\u1ee5ng thay \u0111\u1ed5i v\u00e0 ki\u1ec3m tra l\u1ea1i website.<\/li>\n<\/ol>\n\n<p class=\"wp-block-paragraph\">Ghi l\u1ea1i c\u00e1c c\u00e0i \u0111\u1eb7t tr\u01b0\u1edbc \u0111\u00f3 \u0111\u1ec3 c\u00f3 th\u1ec3 kh\u00f4i ph\u1ee5c n\u1ebfu c\u1ea7n.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n thu\u1ed9c v\u1ec1 c\u00f4ng ty ho\u1eb7c tr\u01b0\u1eddng h\u1ecdc, h\u00e3y li\u00ean h\u1ec7 v\u1edbi qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng tr\u01b0\u1edbc khi thay \u0111\u1ed5i c\u00e0i \u0111\u1eb7t DNS. C\u00e1c tr\u00ecnh ph\u00e2n gi\u1ea3i DNS c\u00f4ng c\u1ed9ng c\u00f3 th\u1ec3 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng v\u1edbi t\u00ean mi\u1ec1n n\u1ed9i b\u1ed9 ri\u00eang.<\/p>\n\n<h3 id=\"h-6-check-vpn-proxy-and-security-software\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Kiem_tra_VPN_proxy_va_phan_mem_bao_mat\"><\/span>6. Ki\u1ec3m tra VPN, proxy v\u00e0 ph\u1ea7n m\u1ec1m b\u1ea3o m\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">D\u1ecbch v\u1ee5 VPN, c\u1ea5u h\u00ecnh proxy v\u00e0 \u1ee9ng d\u1ee5ng b\u1ea3o m\u1eadt c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh ph\u00e2n gi\u1ea3i DNS.<\/p>\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, VPN c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 DNS ri\u00eang. N\u1ebfu k\u1ebft n\u1ed1i \u0111\u00f3 kh\u00f4ng c\u00f2n kh\u1ea3 d\u1ee5ng, vi\u1ec7c tra c\u1ee9u \u0111\u1ecba ch\u1ec9 website c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y ki\u1ec3m tra xem:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>K\u1ebft n\u1ed1i VPN c\u1ee7a b\u1ea1n c\u00f3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng kh\u00f4ng.<\/li>\n\n\n\n<li>Thi\u1ebft b\u1ecb c\u00f3 c\u1ea5u h\u00ecnh proxy ngo\u00e0i d\u1ef1 ki\u1ebfn kh\u00f4ng.<\/li>\n\n\n\n<li>Nh\u1eadt k\u00fd ph\u1ea7n m\u1ec1m b\u1ea3o m\u1eadt c\u00f3 cho th\u1ea5y c\u00e1c y\u00eau c\u1ea7u DNS b\u1ecb ch\u1eb7n kh\u00f4ng.<\/li>\n\n\n\n<li>C\u00e0i \u0111\u1eb7t DNS b\u1ea3o m\u1eadt c\u1ee7a tr\u00ecnh duy\u1ec7t c\u00f3 xung \u0111\u1ed9t v\u1edbi c\u1ea5u h\u00ecnh m\u1ea1ng kh\u00f4ng.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111ang d\u00f9ng VPN c\u00e1 nh\u00e2n, h\u00e3y th\u1eed m\u1ed9t v\u1ecb tr\u00ed VPN kh\u00e1c \u0111\u01b0\u1ee3c ph\u00e9p s\u1eed d\u1ee5ng ho\u1eb7c k\u1ebft n\u1ed1i l\u1ea1i d\u1ecbch v\u1ee5.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Tr\u00e1nh t\u1eaft t\u01b0\u1eddng l\u1eeda ho\u1eb7c t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 ch\u1ed1ng vi-r\u00fat.<\/strong> Thay v\u00e0o \u0111\u00f3, h\u00e3y xem l\u1ea1i c\u00e1c quy t\u1eafc ch\u1eb7n v\u00e0 nh\u1eadt k\u00fd ch\u1ea9n \u0111o\u00e1n.<\/p>\n\n<p class=\"wp-block-paragraph\">Tr\u00ean thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd, h\u00e3y h\u1ecfi qu\u1ea3n tr\u1ecb vi\u00ean tr\u01b0\u1edbc khi thay \u0111\u1ed5i c\u00e0i \u0111\u1eb7t VPN, proxy ho\u1eb7c b\u1ea3o m\u1eadt.<\/p>\n\n<h3 id=\"h-7-update-network-software-or-contact-your-isp\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Cap_nhat_phan_mem_mang_hoac_lien_he_voi_ISP\"><\/span>7. C\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m m\u1ea1ng ho\u1eb7c li\u00ean h\u1ec7 v\u1edbi ISP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu l\u1ed7i v\u1eabn ti\u1ebfp di\u1ec5n, h\u00e3y ki\u1ec3m tra c\u00e1c b\u1ea3n c\u1eadp nh\u1eadt h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 s\u1ef1 c\u1ed1 v\u1edbi b\u1ed9 \u0111i\u1ec1u h\u1ee3p m\u1ea1ng.<\/p>\n\n<p class=\"wp-block-paragraph\">Ng\u01b0\u1eddi d\u00f9ng Windows c\u00f3 th\u1ec3 ch\u1ea1y tr\u00ecnh kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ea1ng t\u00edch h\u1ee3p v\u00e0 ki\u1ec3m tra c\u00e1c b\u1ea3n c\u1eadp nh\u1eadt b\u1ed9 \u0111i\u1ec1u h\u1ee3p m\u1ea1ng th\u00f4ng qua Tr\u00ecnh qu\u1ea3n l\u00fd Thi\u1ebft b\u1ecb.<\/p>\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 ki\u1ec3m tra c\u00e1c m\u00e1y ch\u1ee7 DNS \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng:<\/p>\n\n<pre class=\"wp-block-code\"><code><code>ipconfig \/all<\/code><\/code><\/pre>\n\n<p class=\"wp-block-paragraph\">T\u00ecm c\u00e1c m\u1ee5c DNS Servers t\u01b0\u01a1ng \u1ee9ng v\u1edbi b\u1ed9 \u0111i\u1ec1u h\u1ee3p m\u1ea1ng \u0111ang ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu nhi\u1ec1u thi\u1ebft b\u1ecb c\u00f9ng g\u1eb7p s\u1ef1 c\u1ed1 v\u00e0 c\u00e1c tr\u00ecnh ph\u00e2n gi\u1ea3i DNS c\u00f4ng c\u1ed9ng c\u0169ng kh\u00f4ng th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c, ISP c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n ki\u1ec3m tra.<\/p>\n\n<p class=\"wp-block-paragraph\">Khi li\u00ean h\u1ec7 v\u1edbi b\u1ed9 ph\u1eadn h\u1ed7 tr\u1ee3, h\u00e3y cho bi\u1ebft nh\u1eefng website n\u00e0o kh\u00f4ng truy c\u1eadp \u0111\u01b0\u1ee3c, nh\u1eefng thi\u1ebft b\u1ecb n\u00e0o b\u1ecb \u1ea3nh h\u01b0\u1edfng v\u00e0 k\u1ebft n\u1ed1i \u0111\u00f3 c\u00f3 ho\u1ea1t \u0111\u1ed9ng khi s\u1eed d\u1ee5ng m\u1ea1ng kh\u00e1c hay kh\u00f4ng.<\/p>\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng th\u00f4ng tin n\u00e0y c\u00f3 th\u1ec3 gi\u00fap x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 nhanh h\u01a1n.<\/p>\n\n<h2 id=\"h-what-if-you-own-the-website\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Neu_ban_la_chu_so_huu_website_thi_sao\"><\/span>N\u1ebfu b\u1ea1n l\u00e0 ch\u1ee7 s\u1edf h\u1eefu website th\u00ec sao?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu kh\u00e1ch truy c\u1eadp b\u00e1o l\u1ed7i DNS \u0111\u1ed1i v\u1edbi t\u00ean mi\u1ec1n do b\u1ea1n qu\u1ea3n l\u00fd, v\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 n\u1eb1m \u1edf c\u1ea5u h\u00ecnh t\u00ean mi\u1ec1n thay v\u00ec m\u00e1y t\u00ednh c\u1ee7a h\u1ecd.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y ki\u1ec3m tra nh\u1eefng m\u1ee5c sau:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>\u0110\u0103ng k\u00fd t\u00ean mi\u1ec1n:<\/strong> X\u00e1c nh\u1eadn t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n ch\u01b0a h\u1ebft h\u1ea1n.<\/li>\n\n\n\n<li><strong>M\u00e1y ch\u1ee7 t\u00ean:<\/strong> \u0110\u1ea3m b\u1ea3o nh\u00e0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n tr\u1ecf \u0111\u1ebfn \u0111\u00fang c\u00e1c m\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n.<\/li>\n\n\n\n<li><strong>B\u1ea3n ghi DNS:<\/strong> X\u00e1c minh c\u00e1c b\u1ea3n ghi A, AAAA ho\u1eb7c CNAME c\u1ea7n thi\u1ebft.<\/li>\n\n\n\n<li><strong>DNSSEC:<\/strong> Ki\u1ec3m tra xem c\u1ea5u h\u00ecnh DNSSEC c\u00f3 b\u1ecb sai sau khi thay \u0111\u1ed5i nh\u00e0 cung c\u1ea5p DNS kh\u00f4ng.<\/li>\n\n\n\n<li><strong>Nh\u1eefng thay \u0111\u1ed5i g\u1ea7n \u0111\u00e2y:<\/strong> Ch\u1edd \u0111\u1ee7 th\u1eddi gian \u0111\u1ec3 c\u00e1c ph\u1ea3n h\u1ed3i DNS \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m h\u1ebft h\u1ea1n.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng <code>nslookup<\/code> ho\u1eb7c c\u00f4ng c\u1ee5 tra c\u1ee9u DNS tr\u1ef1c tuy\u1ebfn \u0111\u1ec3 so s\u00e1nh k\u1ebft qu\u1ea3 t\u1eeb nhi\u1ec1u tr\u00ecnh ph\u00e2n gi\u1ea3i.<\/p>\n\n<p class=\"wp-block-paragraph\">N\u1ebfu t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng Cloudflare, h\u00e3y ki\u1ec3m tra b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n DNS c\u1ee7a d\u1ecbch v\u1ee5 n\u00e0y v\u00e0 x\u00e1c nh\u1eadn r\u1eb1ng c\u00e1c b\u1ea3n ghi c\u1ea7n thi\u1ebft \u0111\u00e3 c\u00f3.<\/p>\n\n<h2 id=\"h-dns-server-not-responding-vs-other-connection-errors\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Loi_may_chu_DNS_khong_phan_hoi_va_cac_loi_ket_noi_khac\"><\/span>L\u1ed7i m\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i v\u00e0 c\u00e1c l\u1ed7i k\u1ebft n\u1ed1i kh\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">C\u00e1c l\u1ed7i k\u1ebft n\u1ed1i kh\u00e1c nhau c\u00f3 th\u1ec3 tr\u00f4ng gi\u1ed1ng nhau nh\u01b0ng c\u1ea7n nh\u1eefng c\u00e1ch kh\u1eafc ph\u1ee5c kh\u00e1c nhau.<\/p>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>L\u1ed7i<\/th><th>\u00dd ngh\u0129a<\/th><\/tr><tr><td>M\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i<\/td><td>Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh kh\u00f4ng ph\u1ea3n h\u1ed3i c\u00e1c y\u00eau c\u1ea7u<\/td><\/tr><tr><td>DNS_PROBE_FINISHED_NXDOMAIN<\/td><td>K\u1ebft qu\u1ea3 ph\u00e2n gi\u1ea3i DNS cho bi\u1ebft t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u kh\u00f4ng t\u1ed3n t\u1ea1i<\/td><\/tr><tr><td>ERR_CONNECTION_RESET<\/td><td>M\u1ed9t k\u1ebft n\u1ed1i m\u1ea1ng \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp ho\u1eb7c \u0111ang \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp b\u1ecb \u0111\u1eb7t l\u1ea1i ngo\u00e0i d\u1ef1 ki\u1ebfn<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\"><strong>N\u1ebfu tr\u00ecnh duy\u1ec7t b\u00e1o k\u1ebft n\u1ed1i b\u1ecb \u0111\u1eb7t l\u1ea1i thay v\u00ec tra c\u1ee9u DNS th\u1ea5t b\u1ea1i<\/strong>, h\u00e3y l\u00e0m theo <a href=\"https:\/\/zynoo.com\/blog\/vi\/err-connection-reset\/\">h\u01b0\u1edbng d\u1eabn kh\u1eafc ph\u1ee5c l\u1ed7i ERR_CONNECTION_RESET<\/a> c\u1ee7a ch\u00fang t\u00f4i.<\/p>\n<\/div>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\"><strong>N\u1ebfu website c\u1ee7a b\u1ea1n t\u1ea3i l\u00ean nh\u01b0ng hi\u1ec3n th\u1ecb l\u1ed7i b\u1ea3o m\u1eadt HTTPS thay v\u00ec l\u1ed7i DNS<\/strong>, <a href=\"https:\/\/zynoo.com\/blog\/vi\/err_ssl_version_or_cipher_mismatch\/\">h\u01b0\u1edbng d\u1eabn kh\u1eafc ph\u1ee5c l\u1ed7i ERR_SSL_VERSION_OR_CIPHER_MISMATCH<\/a> c\u1ee7a ch\u00fang t\u00f4i gi\u1ea3i th\u00edch c\u00e1ch x\u00e1c \u0111\u1ecbnh v\u00e0 x\u1eed l\u00fd c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL, giao th\u1ee9c TLS v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch m\u00e3 h\u00f3a.<\/p>\n<\/div>\n\n<div class=\"wp-block-group zynoo-related-reading has-border-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-color:#c7d8ef;border-width:1px;border-radius:8px;border-left-color:#0069ff;border-left-width:3px;color:#24364f;background-color:#eaf2ff;margin-top:28px;margin-bottom:28px;padding-top:18px;padding-right:22px;padding-bottom:18px;padding-left:22px;font-size:16px;line-height:1.8\">\n<p class=\"wp-block-paragraph\"><br \/><strong>B\u1ea1n g\u1eb7p l\u1ed7i DNS khi truy c\u1eadp website?<\/strong> H\u00e3y xem h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/zynoo.com\/blog\/vi\/dns-probe-finished-nxdomain\/?utm_source=chatgpt.com\">c\u00e1ch kh\u1eafc ph\u1ee5c l\u1ed7i DNS_PROBE_FINISHED_NXDOMAIN<\/a> \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n v\u00e0 truy c\u1eadp Internet tr\u1edf l\u1ea1i.<\/p>\n<\/div>\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cau_hoi_thuong_gap\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1793117497209\"><strong class=\"schema-faq-question\">T\u1ea1i sao m\u00e1y ch\u1ee7 DNS c\u1ee7a t\u00f4i kh\u00f4ng ph\u1ea3n h\u1ed3i?<\/strong> <p class=\"schema-faq-answer\">C\u00e1c nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u1ed3m s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i Internet, tr\u00ecnh ph\u00e2n gi\u1ea3i DNS kh\u00f4ng kh\u1ea3 d\u1ee5ng, c\u00e0i \u0111\u1eb7t m\u1ea1ng kh\u00f4ng ch\u00ednh x\u00e1c ho\u1eb7c VPN v\u00e0 ph\u1ea7n m\u1ec1m b\u1ea3o m\u1eadt g\u00e2y c\u1ea3n tr\u1edf.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793117523414\"><strong class=\"schema-faq-question\">S\u1eed d\u1ee5ng DNS c\u1ee7a Cloudflare ho\u1eb7c Google c\u00f3 an to\u00e0n kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u1ea3 hai \u0111\u1ec1u l\u00e0 d\u1ecbch v\u1ee5 ph\u00e2n gi\u1ea3i DNS c\u00f4ng c\u1ed9ng ph\u1ed5 bi\u1ebfn. Tuy nhi\u00ean, ch\u00ednh s\u00e1ch quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a ch\u00fang kh\u00e1c nhau, v\u00e0 vi\u1ec7c \u0111\u1ed5i nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh n\u0103ng l\u1ecdc ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng n\u1ed9i b\u1ed9.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793117538393\"><strong class=\"schema-faq-question\">Kh\u1edfi \u0111\u1ed9ng l\u1ea1i b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn c\u00f3 kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c s\u1ef1 c\u1ed1 DNS kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Vi\u1ec7c n\u00e0y c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c c\u00e1c s\u1ef1 c\u1ed1 t\u1ea1m th\u1eddi v\u1edbi b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 k\u1ebft n\u1ed1i. Tuy nhi\u00ean, n\u00f3 kh\u00f4ng th\u1ec3 s\u1eeda c\u00e1c b\u1ea3n ghi t\u00ean mi\u1ec1n kh\u00f4ng ch\u00ednh x\u00e1c ho\u1eb7c t\u00ecnh tr\u1ea1ng gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 k\u00e9o d\u00e0i t\u1eeb ISP.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1793117547882\"><strong class=\"schema-faq-question\">X\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m DNS c\u00f3 gi\u00fap Internet nhanh h\u01a1n kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">Kh\u00f4ng nh\u1ea5t thi\u1ebft. X\u00f3a b\u1ed9 nh\u1edb \u0111\u1ec7m DNS s\u1ebd lo\u1ea1i b\u1ecf c\u00e1c k\u1ebft qu\u1ea3 tra c\u1ee9u \u0111\u00e3 l\u01b0u. \u0110\u00e2y ch\u1ee7 y\u1ebfu l\u00e0 m\u1ed9t b\u01b0\u1edbc kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1, kh\u00f4ng b\u1ea3o \u0111\u1ea3m c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 Internet.<\/p> <\/div> <\/div>\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p class=\"wp-block-paragraph\">L\u1ed7i m\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i kh\u00f4ng nh\u1ea5t thi\u1ebft c\u00f3 ngh\u0129a l\u00e0 k\u1ebft n\u1ed1i Internet c\u1ee7a b\u1ea1n \u0111\u00e3 m\u1ea5t ho\u00e0n to\u00e0n. L\u1ed7i n\u00e0y th\u01b0\u1eddng cho th\u1ea5y c\u00f3 v\u1ea5n \u0111\u1ec1 trong qu\u00e1 tr\u00ecnh thi\u1ebft b\u1ecb li\u00ean l\u1ea1c v\u1edbi tr\u00ecnh ph\u00e2n gi\u1ea3i DNS.<\/p>\n\n<p class=\"wp-block-paragraph\">H\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch ki\u1ec3m tra k\u1ebft n\u1ed1i v\u00e0 kh\u1edfi \u0111\u1ed9ng l\u1ea1i thi\u1ebft b\u1ecb m\u1ea1ng. N\u1ebfu s\u1ef1 c\u1ed1 v\u1eabn ti\u1ebfp di\u1ec5n, h\u00e3y ki\u1ec3m tra tr\u00ecnh ph\u00e2n gi\u1ea3i, x\u00f3a th\u00f4ng tin DNS \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 xem l\u1ea1i c\u00e0i \u0111\u1eb7t DNS.<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch t\u1ed1t nh\u1ea5t l\u00e0 x\u00e1c \u0111\u1ecbnh qu\u00e1 tr\u00ecnh ph\u00e2n gi\u1ea3i DNS b\u1ecb l\u1ed7i \u1edf \u0111\u00e2u tr\u01b0\u1edbc khi thay \u0111\u1ed5i c\u1ea5u h\u00ecnh m\u1ea1ng.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u1ed7i m\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i xu\u1ea5t hi\u1ec7n khi thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i t\u1eeb m\u00e1y ch\u1ee7 DNS ch\u1ecbu tr\u00e1ch nhi\u1ec7m ph\u00e2n gi\u1ea3i \u0111\u1ecba ch\u1ec9 website. B\u1ea1n v\u1eabn c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i Wi-Fi, nh\u01b0ng c\u00e1c website kh\u00f4ng t\u1ea3i \u0111\u01b0\u1ee3c v\u00ec m\u00e1y t\u00ednh kh\u00f4ng th\u1ec3 tra c\u1ee9u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3863,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[646],"tags":[664,662,663],"class_list":["post-3860","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dich-vu-luu-tru-web","tag-huong-dan","tag-may-chu-dns","tag-may-chu-dns-khong-phan-hoi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>M\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i? 7 c\u00e1ch kh\u1eafc ph\u1ee5c<\/title>\n<meta name=\"description\" content=\"M\u00e1y ch\u1ee7 DNS kh\u00f4ng ph\u1ea3n h\u1ed3i: Th\u00f4ng b\u00e1o n\u00e0y cho bi\u1ebft m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i Internet. 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