{"id":36853,"date":"2025-12-18T11:32:49","date_gmt":"2025-12-18T04:32:49","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=36853"},"modified":"2026-02-11T13:32:28","modified_gmt":"2026-02-11T06:32:28","slug":"opendns-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/opendns-la-gi\/","title":{"rendered":"OpenDNS l\u00e0 g\u00ec? T\u00ednh n\u0103ng, L\u1ee3i \u00edch, \u1ee8ng d\u1ee5ng &#038; Thi\u1ebft l\u1eadp OpenDNS"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/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 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#OpenDNS-la-gi\" >OpenDNS l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#OpenDNS-co-nhung-tinh-nang-noi-bat-nao\" >OpenDNS c\u00f3 nh\u1eefng t\u00ednh n\u0103ng n\u1ed5i b\u1eadt n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#OpenDNS-dung-de-lam-gi\" >OpenDNS d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Tang-toc-do-phan-giai-ten-mien\" >T\u0103ng t\u1ed1c \u0111\u1ed9 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Lam-%E2%80%9Cla-chan%E2%80%9D-bao-mat-Security-Layer\" >L\u00e0m &#8220;l\u00e1 ch\u1eafn&#8221; b\u1ea3o m\u1eadt (Security Layer)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Quan-ly-truy-cap-va-loc-noi-dung\" >Qu\u1ea3n l\u00fd truy c\u1eadp v\u00e0 l\u1ecdc n\u1ed9i dung<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Do-tin-cay-va-cam-ket-Uptime\" >\u0110\u1ed9 tin c\u1eady v\u00e0 cam k\u1ebft Uptime<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#4-Loi-ich-vuot-troi-khi-su-dung-OpenDNS\" >4 L\u1ee3i \u00edch v\u01b0\u1ee3t tr\u1ed9i khi s\u1eed d\u1ee5ng OpenDNS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#1-Tang-toc-do-truy-cap-Web-thong-minh\" >1. T\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp Web th\u00f4ng minh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#2-Bao-mat-nang-cao-voi-co-so-du-lieu-PhishTank\" >2. B\u1ea3o m\u1eadt n\u00e2ng cao v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u PhishTank<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#3-Do-on-dinh-cao\" >3. \u0110\u1ed9 \u1ed5n \u0111\u1ecbnh cao<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#4-Tinh-nang-kiem-soat-phu-huynh-Parental-Control-mien-phi\" >4. T\u00ednh n\u0103ng ki\u1ec3m so\u00e1t ph\u1ee5 huynh (Parental Control) mi\u1ec5n ph\u00ed<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#OpenDNS-co-an-toan-khong\" >OpenDNS c\u00f3 an to\u00e0n kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Uu-va-nhuoc-diem-cua-OpenDNS\" >\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a OpenDNS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#So-sanh-OpenDNS-Google-DNS-va-Cloudflare-1111\" >So s\u00e1nh OpenDNS, Google DNS v\u00e0 Cloudflare (1.1.1.1)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Khi-nao-nen-su-dung-OpenDNS\" >Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng OpenDNS?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#OpenDNS-phu-hop-voi-ai\" >OpenDNS ph\u00f9 h\u1ee3p v\u1edbi ai?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Cach-doi-DNS-sang-OpenDNS-tren-cac-thiet-bi-pho-bien\" >C\u00e1ch \u0111\u1ed5i DNS sang OpenDNS tr\u00ean c\u00e1c thi\u1ebft b\u1ecb ph\u1ed5 bi\u1ebfn<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Cach-doi-DNS-OpenDNS-tren-Windows\" >C\u00e1ch \u0111\u1ed5i DNS OpenDNS tr\u00ean Windows<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Cach-doi-DNS-OpenDNS-tren-macOS\" >C\u00e1ch \u0111\u1ed5i DNS OpenDNS tr\u00ean macOS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Cach-doi-DNS-OpenDNS-tren-dien-thoai-AndroidiOS\" >C\u00e1ch \u0111\u1ed5i DNS OpenDNS tr\u00ean \u0111i\u1ec7n tho\u1ea1i Android\/iOS<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Cach-thiet-lap-OpenDNS-tung-buoc-chi-tiet\" >C\u00e1ch thi\u1ebft l\u1eadp OpenDNS t\u1eebng b\u01b0\u1edbc chi ti\u1ebft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Nhung-cau-hoi-thuong-gap-FAQ\" >Nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/opendns-la-gi\/#Loi-ket\" >L\u1eddi k\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n<div style=\"background-color: #f0f7ff; border-left: 5px solid #0056b3; padding: 15px; margin-bottom: 20px;\">\n<p><strong>T\u00f3m t\u1eaft n\u1ed9i dung:<\/strong><\/p>\n<p><strong>OpenDNS<\/strong> l\u00e0 d\u1ecbch v\u1ee5 ph\u00e2n gi\u1ea3i <a href=\"https:\/\/interdata.vn\/blog\/domain-la-gi\/\">t\u00ean mi\u1ec1n<\/a> (<a href=\"https:\/\/interdata.vn\/blog\/dns-la-gi\/\">DNS<\/a>) gi\u00fap <a href=\"https:\/\/interdata.vn\/blog\/domain-migration-la-gi\/\">chuy\u1ec3n \u0111\u1ed5i t\u00ean mi\u1ec1n<\/a> <a href=\"https:\/\/interdata.vn\/blog\/website-la-gi\/\">website<\/a> th\u00e0nh <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a>, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p c\u00e1c l\u1edbp <a href=\"https:\/\/interdata.vn\/blog\/bao-mat-mang\/\">b\u1ea3o m\u1eadt m\u1ea1ng<\/a> \u0111\u1ec3 ng\u0103n ch\u1eb7n l\u1eeba \u0111\u1ea3o v\u00e0 l\u1ecdc n\u1ed9i dung \u0111\u1ed9c h\u1ea1i. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p \u0111\u1ecba ch\u1ec9 IP m\u1edbi nh\u1ea5t, h\u01b0\u1edbng d\u1eabn c\u1ea5u h\u00ecnh v\u00e0 ph\u00e2n t\u00edch chuy\u00ean s\u00e2u v\u1ec1 t\u00ednh n\u0103ng an to\u00e0n c\u1ee7a OpenDNS.<\/p>\n<p><strong>Th\u00f4ng tin ch\u00ednh trong b\u00e0i vi\u1ebft:<\/strong><\/p>\n<ul>\n<li><strong>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng:<\/strong> \u0110\u1ecbnh tuy\u1ebfn y\u00eau c\u1ea7u truy c\u1eadp qua <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a> c\u1ee7a Cisco \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ed9 an to\u00e0n tr\u01b0\u1edbc khi k\u1ebft n\u1ed1i.<\/li>\n<li><strong>C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh:<\/strong> Bao g\u1ed3m OpenDNS Home (mi\u1ec5n ph\u00ed), Family Shield (ch\u1eb7n web \u0111en) v\u00e0 Cisco Umbrella (doanh nghi\u1ec7p).<\/li>\n<li><strong>L\u1ee3i \u00edch ch\u00ednh:<\/strong> C\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 l\u01b0\u1edbt web, ch\u1eb7n m\u00e3 \u0111\u1ed9c (<a href=\"https:\/\/interdata.vn\/blog\/malware-la-gi\/\">malware<\/a>), <a href=\"https:\/\/interdata.vn\/blog\/tan-cong-phishing-la-gi\/\">phishing<\/a> v\u00e0 ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp c\u1ee7a tr\u1ebb em.<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p d\u00f9ng<\/strong>: Gia \u0111\u00ecnh, m\u1ea1ng v\u0103n ph\u00f2ng nh\u1ecf, m\u00e1y t\u00ednh th\u01b0\u1eddng c\u00e0i ph\u1ea7n m\u1ec1m l\u1ea1, nh\u00e0 m\u1ea1ng qu\u00e1 t\u1ebf.<\/li>\n<\/ul>\n<\/div>\n<p><strong>OpenDNS l\u00e0 g\u00ec<\/strong> v\u00e0 t\u1ea1i sao d\u1ecbch v\u1ee5 n\u00e0y l\u1ea1i \u0111\u01b0\u1ee3c h\u00e0ng tri\u1ec7u ng\u01b0\u1eddi d\u00f9ng tr\u00ean to\u00e0n c\u1ea7u tin d\u00f9ng \u0111\u1ec3 <strong>thay th\u1ebf cho DNS m\u1eb7c \u0111\u1ecbnh<\/strong> c\u1ee7a nh\u00e0 m\u1ea1ng? Trong b\u1ed1i c\u1ea3nh c\u00e1c m\u1ed1i \u0111e d\u1ecda an ninh m\u1ea1ng ng\u00e0y c\u00e0ng gia t\u0103ng v\u00e0 t\u00ecnh tr\u1ea1ng <a href=\"https:\/\/interdata.vn\/blog\/mang-internet\/\">m\u1ea1ng internet<\/a> ch\u1eadp ch\u1eddn th\u01b0\u1eddng xuy\u00ean x\u1ea3y ra, vi\u1ec7c t\u00ecm ki\u1ebfm m\u1ed9t gi\u1ea3i ph\u00e1p \u1ed5n \u0111\u1ecbnh \u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 b\u1ea3o m\u1eadt th\u00f4ng tin l\u00e0 nhu c\u1ea7u c\u1ea5p thi\u1ebft. B\u00e0i vi\u1ebft n\u00e0y c\u1ee7a InterData s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft v\u1ec1 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a OpenDNS,\u00a0cung c\u1ea5p th\u00f4ng s\u1ed1 IP m\u1edbi nh\u1ea5t v\u00e0 \u0111\u00e1nh gi\u00e1 t\u00ednh hi\u1ec7u qu\u1ea3 c\u1ee7a OpenDNS trong vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a tr\u1ea3i nghi\u1ec7m internet.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OpenDNS-la-gi\"><\/span>OpenDNS l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>OpenDNS<\/strong> l\u00e0 <strong>h\u1ec7 th\u1ed1ng m\u00e1y ch\u1ee7 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n<\/strong> (DNS) c\u00f4ng c\u1ed9ng, \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t &#8220;cu\u1ed1n danh b\u1ea1&#8221; c\u1ee7a internet, gi\u00fap d\u1ecbch c\u00e1c t\u00ean mi\u1ec1n th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng th\u00e0nh c\u00e1c \u0111\u1ecba ch\u1ec9 IP m\u00e1y t\u00ednh c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c (nh\u01b0 192.168.x.x).<\/p>\n<p>\u0110i\u1ec3m kh\u00e1c bi\u1ec7t c\u1ee7a OpenDNS n\u1eb1m \u1edf kh\u1ea3 n\u0103ng t\u1ed1i \u01b0u h\u00f3a \u0111\u01b0\u1eddng \u0111i c\u1ee7a d\u1eef li\u1ec7u \u0111\u1ec3 t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp v\u00e0 t\u00edch h\u1ee3p c\u00e1c l\u1edbp l\u1ecdc n\u1ed9i dung \u0111\u1ec3 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<figure id=\"attachment_36855\" aria-describedby=\"caption-attachment-36855\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36855\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/OpenDNS-la-gi.jpg\" alt=\"OpenDNS l\u00e0 g\u00ec?\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/OpenDNS-la-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/OpenDNS-la-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/OpenDNS-la-gi-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36855\" class=\"wp-caption-text\">OpenDNS l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>Trong m\u00f4 h\u00ecnh m\u1ea1ng m\u00e1y t\u00ednh, khi ng\u01b0\u1eddi d\u00f9ng nh\u1eadp m\u1ed9t \u0111\u1ecba ch\u1ec9 website v\u00e0o tr\u00ecnh duy\u1ec7t, m\u00e1y t\u00ednh c\u1ea7n h\u1ecfi m\u1ed9t m\u00e1y ch\u1ee7 DNS \u0111\u1ec3 bi\u1ebft \u0111\u1ecba ch\u1ec9 IP c\u1ee7a website \u0111\u00f3 n\u1eb1m \u1edf \u0111\u00e2u. Th\u00f4ng th\u01b0\u1eddng, qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi DNS c\u1ee7a nh\u00e0 m\u1ea1ng (ISP). Tuy nhi\u00ean, OpenDNS thay th\u1ebf vai tr\u00f2 n\u00e0y b\u1eb1ng h\u1ec7 th\u1ed1ng m\u00e1y ch\u1ee7 to\u00e0n c\u1ea7u c\u1ee7a ri\u00eang h\u1ecd.<\/p>\n<p>C\u01a1 ch\u1ebf c\u1ee7a OpenDNS ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean m\u1ea1ng l\u01b0\u1edbi <a href=\"https:\/\/interdata.vn\/blog\/anycast-la-gi\/\">Anycast<\/a>. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 khi b\u1ea1n g\u1eedi y\u00eau c\u1ea7u ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n, h\u1ec7 th\u1ed1ng s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u1ecbnh tuy\u1ebfn y\u00eau c\u1ea7u \u0111\u00f3 \u0111\u1ebfn m\u00e1y ch\u1ee7 d\u1eef li\u1ec7u g\u1ea7n v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd c\u1ee7a b\u1ea1n nh\u1ea5t. Nh\u1edd v\u1eady, th\u1eddi gian ph\u1ea3n h\u1ed3i (<a href=\"https:\/\/interdata.vn\/blog\/latency-la-gi\/\">latency<\/a>) \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u \u0111\u00e1ng k\u1ec3, gi\u00fap qu\u00e1 tr\u00ecnh t\u1ea3i trang di\u1ec5n ra nhanh h\u01a1n.<\/p>\n<p>N\u0103m 2015, m\u1ed9t s\u1ef1 ki\u1ec7n quan tr\u1ecdng \u0111\u00e3 kh\u1eb3ng \u0111\u1ecbnh v\u1ecb th\u1ebf c\u1ee7a OpenDNS: T\u1eadp \u0111o\u00e0n c\u00f4ng ngh\u1ec7 kh\u1ed5ng l\u1ed3\u00a0Cisco\u00a0\u0111\u00e3 mua l\u1ea1i d\u1ecbch v\u1ee5 n\u00e0y. K\u1ec3 t\u1eeb \u0111\u00f3, OpenDNS \u0111\u01b0\u1ee3c th\u1eeba h\u01b0\u1edfng n\u1ec1n t\u1ea3ng h\u1ea1 t\u1ea7ng v\u00e0 c\u00f4ng ngh\u1ec7 b\u1ea3o m\u1eadt c\u1ea5p doanh nghi\u1ec7p t\u1eeb Cisco. \u0110i\u1ec1u n\u00e0y mang l\u1ea1i s\u1ef1 an t\u00e2m tuy\u1ec7t \u0111\u1ed1i v\u1ec1 t\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 tin c\u1eady (Trust) cho ng\u01b0\u1eddi d\u00f9ng c\u00e1 nh\u00e2n l\u1eabn doanh nghi\u1ec7p nh\u1ecf.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OpenDNS-co-nhung-tinh-nang-noi-bat-nao\"><\/span>OpenDNS c\u00f3 nh\u1eefng t\u00ednh n\u0103ng n\u1ed5i b\u1eadt n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u1ecbch v\u1ee5 OpenDNS c\u00f3 kh\u1ea3 n\u0103ng <strong>ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c trang web l\u1eeba \u0111\u1ea3o<\/strong> (phishing) c\u0169ng nh\u01b0 h\u00e0nh vi \u0111\u00e1nh c\u1eafp th\u00f4ng tin nh\u1ea1y c\u1ea3m c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. \u0110i\u1ec3m m\u1ea1nh c\u1ee7a t\u00ednh n\u0103ng n\u00e0y l\u00e0 ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp, kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh\/\">h\u1ec7 \u0111i\u1ec1u h\u00e0nh<\/a> hay tr\u00ecnh duy\u1ec7t web \u0111ang s\u1eed d\u1ee5ng.<\/p>\n<p>B\u00ean c\u1ea1nh \u0111\u00f3, OpenDNS s\u1edf h\u1eefu h\u1ec7 th\u1ed1ng b\u1ed9 nh\u1edb \u0111\u1ec7m (cache) quy m\u00f4 l\u1edbn, \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ea1i nhi\u1ec1u n\u00fat giao c\u1ee7a m\u1ea1ng internet. Nh\u1edd v\u1eady, khi s\u1eed d\u1ee5ng OpenDNS, <strong>t\u1ed1c \u0111\u1ed9 truy c\u1eadp v\u00e0 duy\u1ec7t web c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3<\/strong>.<\/p>\n<figure id=\"attachment_36856\" aria-describedby=\"caption-attachment-36856\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36856\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Tinh-nang-noi-bat-cua-OpenDNS.jpg\" alt=\"T\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a OpenDNS\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Tinh-nang-noi-bat-cua-OpenDNS.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Tinh-nang-noi-bat-cua-OpenDNS-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Tinh-nang-noi-bat-cua-OpenDNS-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36856\" class=\"wp-caption-text\">T\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a OpenDNS<\/figcaption><\/figure>\n<p>M\u1ed9t \u01b0u \u0111i\u1ec3m kh\u00e1c c\u1ee7a d\u1ecbch v\u1ee5 OpenDNS mi\u1ec5n ph\u00ed l\u00e0<strong> kh\u1ea3 n\u0103ng x\u1eed l\u00fd th\u00f4ng minh<\/strong> khi ng\u01b0\u1eddi d\u00f9ng nh\u1eadp sai t\u00ean mi\u1ec1n. Thay v\u00ec b\u00e1o l\u1ed7i nh\u01b0 tr\u00ecnh duy\u1ec7t th\u00f4ng th\u01b0\u1eddng, OpenDNS c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng \u0111i\u1ec1u ch\u1ec9nh v\u1ec1 t\u00ean mi\u1ec1n ch\u00ednh x\u00e1c. Trong tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng th\u1ec3 s\u1eeda l\u1ed7i, h\u1ec7 th\u1ed1ng s\u1ebd hi\u1ec3n th\u1ecb c\u00e1c k\u1ebft qu\u1ea3 c\u00f3 t\u00ean mi\u1ec1n t\u01b0\u01a1ng t\u1ef1 \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng d\u1ec5 l\u1ef1a ch\u1ecdn.<\/p>\n<p>OpenDNS c\u0169ng <strong>r\u1ea5t d\u1ec5 s\u1eed d\u1ee5ng<\/strong>. Ng\u01b0\u1eddi d\u00f9ng ch\u1ec9 c\u1ea7n c\u1ea5u h\u00ecnh DNS m\u1ed9t l\u1ea7n duy nh\u1ea5t v\u00e0 c\u00f3 th\u1ec3 quay l\u1ea1i thi\u1ebft l\u1eadp ban \u0111\u1ea7u b\u1ea5t c\u1ee9 l\u00fac n\u00e0o n\u1ebfu kh\u00f4ng mu\u1ed1n ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng OpenDNS.<\/p>\n<p>Ngo\u00e0i ra, khi d\u00f9ng OpenDNS, ng\u01b0\u1eddi d\u00f9ng <strong>kh\u00f4ng c\u1ea7n c\u00e0i \u0111\u1eb7t th\u00eam b\u1ea5t k\u1ef3 ph\u1ea7n m\u1ec1m n\u00e0o kh\u00e1c<\/strong>. D\u1ecbch v\u1ee5 n\u00e0y c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh tr\u00ean h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 tr\u00ecnh duy\u1ec7t web ph\u1ed5 bi\u1ebfn hi\u1ec7n nay.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OpenDNS-dung-de-lam-gi\"><\/span>OpenDNS d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi l\u1ea7m t\u01b0\u1edfng DNS ch\u1ec9 gi\u00fap v\u00e0o m\u1ea1ng. Tuy nhi\u00ean, v\u1edbi c\u00e2u h\u1ecfi <strong>OpenDNS d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec<\/strong>, c\u00e2u tr\u1ea3 l\u1eddi bao h\u00e0m nhi\u1ec1u kh\u00eda c\u1ea1nh k\u1ef9 thu\u1eadt v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf h\u01a1n th\u1ebf.<\/p>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng OpenDNS mang l\u1ea1i ba l\u1ee3i \u00edch ch\u00ednh:\u00a0T\u1ed1c \u0111\u1ed9 truy c\u1eadp nhanh h\u01a1n\u00a0nh\u1edd m\u1ea1ng l\u01b0\u1edbi m\u00e1y ch\u1ee7 to\u00e0n c\u1ea7u,\u00a0B\u1ea3o m\u1eadt ch\u1ee7 \u0111\u1ed9ng\u00a0tr\u01b0\u1edbc c\u00e1c m\u1ed1i \u0111e d\u1ecda m\u1ea1ng v\u00e0\u00a0Quy\u1ec1n ki\u1ec3m so\u00e1t n\u1ed9i dung\u00a0chi ti\u1ebft cho ph\u1ee5 huynh ho\u1eb7c qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tang-toc-do-phan-giai-ten-mien\"><\/span><strong>T\u0103ng t\u1ed1c \u0111\u1ed9 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>H\u1ec7 th\u1ed1ng m\u00e1y ch\u1ee7 c\u1ee7a c\u00e1c nh\u00e0 m\u1ea1ng (ISP) t\u1ea1i Vi\u1ec7t Nam \u0111\u00f4i khi g\u1eb7p t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i v\u00e0o gi\u1edd cao \u0111i\u1ec3m, d\u1eabn \u0111\u1ebfn \u0111\u1ed9 tr\u1ec5 (latency) cao khi b\u1ea1n g\u00f5 m\u1ed9t \u0111\u1ecba ch\u1ec9 web. OpenDNS s\u1eed d\u1ee5ng m\u1ea1ng l\u01b0\u1edbi m\u00e1y ch\u1ee7 Anycast to\u00e0n c\u1ea7u kh\u1ed5ng l\u1ed3. Khi b\u1ea1n g\u1eedi y\u00eau c\u1ea7u, h\u1ec7 th\u1ed1ng s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u1ecbnh tuy\u1ebfn \u0111\u1ebfn m\u00e1y ch\u1ee7 g\u1ea7n nh\u1ea5t v\u00e0 c\u00f3 t\u1ea3i tr\u1ecdng th\u1ea5p nh\u1ea5t, gi\u00fap qu\u00e1 tr\u00ecnh &#8220;phi\u00ean d\u1ecbch&#8221; t\u00ean mi\u1ec1n di\u1ec5n ra g\u1ea7n nh\u01b0 t\u1ee9c th\u00ec.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lam-%E2%80%9Cla-chan%E2%80%9D-bao-mat-Security-Layer\"><\/span><strong>L\u00e0m &#8220;l\u00e1 ch\u1eafn&#8221; b\u1ea3o m\u1eadt (Security Layer)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 t\u00ednh n\u0103ng t\u1ea1o n\u00ean t\u00ean tu\u1ed5i c\u1ee7a OpenDNS. D\u1ecbch v\u1ee5 n\u00e0y ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t ch\u1ed1t ch\u1eb7n \u0111\u1ea7u ti\u00ean. Tr\u01b0\u1edbc khi m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n k\u1ecbp t\u1ea3i m\u1ed9t trang web ch\u1ee9a m\u00e3 \u0111\u1ed9c (malware) hay m\u1ed9t \u0111\u01b0\u1eddng link gi\u1ea3 m\u1ea1o ng\u00e2n h\u00e0ng, OpenDNS \u0111\u00e3 nh\u1eadn di\u1ec7n v\u00e0 ch\u1eb7n k\u1ebft n\u1ed1i \u0111\u00f3 ngay t\u1eeb c\u1ea5p \u0111\u1ed9 t\u00ean mi\u1ec1n. \u0110i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n r\u1ee7i ro tr\u01b0\u1edbc khi virus k\u1ecbp x\u00e2m nh\u1eadp v\u00e0o \u1ed5 c\u1ee9ng c\u1ee7a b\u1ea1n.<\/p>\n<figure id=\"attachment_36857\" aria-describedby=\"caption-attachment-36857\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36857\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/OpenDNS-dung-de-lam-gi.jpg\" alt=\"OpenDNS d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/OpenDNS-dung-de-lam-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/OpenDNS-dung-de-lam-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/OpenDNS-dung-de-lam-gi-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36857\" class=\"wp-caption-text\">OpenDNS d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Quan-ly-truy-cap-va-loc-noi-dung\"><\/span><strong>Qu\u1ea3n l\u00fd truy c\u1eadp v\u00e0 l\u1ecdc n\u1ed9i dung<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1eafc l\u1ef1c cho c\u00e1c b\u1eadc ph\u1ee5 huynh ho\u1eb7c ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb m\u1ea1ng doanh nghi\u1ec7p. B\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp c\u00e1c quy t\u1eafc \u0111\u1ec3 ch\u1eb7n danh m\u1ee5c c\u1ee5 th\u1ec3 nh\u01b0: m\u1ea1ng x\u00e3 h\u1ed9i, web \u0111en, web c\u00e1 \u0111\u1ed9, ho\u1eb7c c\u00e1c trang chia s\u1ebb video.<\/p>\n<p>Vi\u1ec7c ch\u1eb7n n\u00e0y di\u1ec5n ra \u1edf c\u1ea5p \u0111\u1ed9 m\u1ea1ng, ngh\u0129a l\u00e0 m\u1ecdi thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i v\u00e0o Wifi (t\u1eeb \u0111i\u1ec7n tho\u1ea1i, m\u00e1y t\u00ednh b\u1ea3ng \u0111\u1ebfn Smart TV) \u0111\u1ec1u ch\u1ecbu s\u1ef1 qu\u1ea3n l\u00fd n\u00e0y m\u00e0 kh\u00f4ng c\u1ea7n c\u00e0i app ri\u00eang l\u1ebb cho t\u1eebng m\u00e1y.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do-tin-cay-va-cam-ket-Uptime\"><\/span>\u0110\u1ed9 tin c\u1eady v\u00e0 cam k\u1ebft Uptime<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1eeb khi thu\u1ed9c v\u1ec1 Cisco, OpenDNS duy tr\u00ec cam k\u1ebft th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng (<a href=\"https:\/\/interdata.vn\/blog\/uptime-la-gi\/\">uptime<\/a>) g\u1ea7n nh\u01b0 tuy\u1ec7t \u0111\u1ed1i (100%). \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i internet c\u1ee7a ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n do l\u1ed7i c\u1ee7a m\u00e1y ch\u1ee7 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n, m\u1ed9t v\u1ea5n \u0111\u1ec1 thi tho\u1ea3ng v\u1eabn g\u1eb7p ph\u1ea3i \u1edf c\u00e1c DNS quy m\u00f4 nh\u1ecf.<\/p>\n<div class=\"highlight-cta-box\" style=\"background: #fff5f5; padding: 20px; border-radius: 8px; border: 1px solid #d9534f; text-align: center; margin: 20px 0;\">\n<p style=\"color: #d9534f; margin-top: 0;\"><strong><span style=\"font-size: 120%;\">T\u0103ng t\u1ed1c Website &amp; B\u1ea3o m\u1eadt D\u1eef li\u1ec7u v\u1edbi VPS InterData<\/span><\/strong><\/p>\n<p>B\u00ean c\u1ea1nh vi\u1ec7c \u0111\u1ed5i DNS, s\u1eed d\u1ee5ng m\u1ed9t m\u00e1y ch\u1ee7 \u1ea3o (VPS) ch\u1ea5t l\u01b0\u1ee3ng cao l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 website c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng m\u01b0\u1ee3t m\u00e0 v\u00e0 an to\u00e0n. Kh\u00e1m ph\u00e1 ngay c\u00e1c g\u00f3i VPS gi\u00e1 r\u1ebb v\u1edbi hi\u1ec7u n\u0103ng v\u01b0\u1ee3t tr\u1ed9i t\u1ea1i InterData.<br \/>\n<a class=\"cta-button\" style=\"display: inline-block; background: #ff6600; color: #fff; padding: 12px 25px; border-radius: 5px; text-decoration: none; font-weight: bold; margin-top: 10px;\" href=\"https:\/\/interdata.vn\/thue-vps\/\">Xem b\u1ea3ng gi\u00e1 VPS ngay!<\/a><\/p>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"4-Loi-ich-vuot-troi-khi-su-dung-OpenDNS\"><\/span>4 L\u1ee3i \u00edch v\u01b0\u1ee3t tr\u1ed9i khi s\u1eed d\u1ee5ng OpenDNS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u1ea1i sao gi\u1eefa h\u00e0ng lo\u1ea1t d\u1ecbch v\u1ee5 DNS nh\u01b0 Google, <a href=\"https:\/\/interdata.vn\/blog\/cloudflare-la-gi\/\">Cloudflare<\/a> hay Quad9, ng\u01b0\u1eddi d\u00f9ng v\u1eabn t\u00ecm ki\u1ebfm <strong>OpenDNS<\/strong>\u00a0v\u00e0 l\u1ef1a ch\u1ecdn s\u1eed d\u1ee5ng n\u00f3? D\u01b0\u1edbi \u0111\u00e2y l\u00e0 4 l\u1ee3i \u00edch c\u1ed1t l\u00f5i \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng qua th\u1eddi gian.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Tang-toc-do-truy-cap-Web-thong-minh\"><\/span>1. T\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp Web th\u00f4ng minh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>OpenDNS s\u1edf h\u1eefu m\u1ed9t b\u1ed9 nh\u1edb \u0111\u1ec7m (Cache) c\u1ef1c l\u1edbn v\u00e0 th\u00f4ng minh. Khi h\u00e0ng tri\u1ec7u ng\u01b0\u1eddi d\u00f9ng tr\u00ean th\u1ebf gi\u1edbi truy c\u1eadp c\u00e1c trang web ph\u1ed5 bi\u1ebfn, OpenDNS \u0111\u00e3 l\u01b0u s\u1eb5n \u0111\u1ecba ch\u1ec9 IP c\u1ee7a c\u00e1c trang n\u00e0y. Khi b\u1ea1n truy c\u1eadp, h\u1ec7 th\u1ed1ng tr\u1ea3 v\u1ec1 k\u1ebft qu\u1ea3 ngay l\u1eadp t\u1ee9c m\u00e0 kh\u00f4ng c\u1ea7n \u0111i h\u1ecfi l\u1ea1i m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n<p>\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng t\u1ea1i Vi\u1ec7t Nam, \u0111i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong c\u00e1c th\u1eddi \u0111i\u1ec3m c\u00e1p quang bi\u1ec3n g\u1eb7p s\u1ef1 c\u1ed1, gi\u00fap vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn \u0111i qu\u1ed1c t\u1ebf \u1ed5n \u0111\u1ecbnh h\u01a1n so v\u1edbi DNS c\u1ee7a nh\u00e0 m\u1ea1ng trong n\u01b0\u1edbc.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Bao-mat-nang-cao-voi-co-so-du-lieu-PhishTank\"><\/span>2. B\u1ea3o m\u1eadt n\u00e2ng cao v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u PhishTank<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>OpenDNS t\u1eadn d\u1ee5ng d\u1eef li\u1ec7u t\u1eeb PhishTank \u2013 c\u1ed9ng \u0111\u1ed3ng chia s\u1ebb d\u1eef li\u1ec7u v\u1ec1 l\u1eeba \u0111\u1ea3o tr\u1ef1c tuy\u1ebfn l\u1edbn nh\u1ea5t th\u1ebf gi\u1edbi. Ngay khi m\u1ed9t trang web l\u1eeba \u0111\u1ea3o m\u1edbi xu\u1ea5t hi\u1ec7n, c\u1ed9ng \u0111\u1ed3ng s\u1ebd b\u00e1o c\u00e1o v\u00e0 OpenDNS c\u1eadp nh\u1eadt ngay v\u00e0o h\u1ec7 th\u1ed1ng.<\/p>\n<p>V\u00ed d\u1ee5: B\u1ea1n nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t <a href=\"https:\/\/interdata.vn\/blog\/email-spoofing-la-gi\/\">email gi\u1ea3 m\u1ea1o<\/a> th\u00f4ng b\u00e1o tr\u00fang th\u01b0\u1edfng k\u00e8m \u0111\u01b0\u1eddng link l\u1ea1. N\u1ebfu l\u1ee1 tay b\u1ea5m v\u00e0o, OpenDNS s\u1ebd hi\u1ec3n th\u1ecb c\u1ea3nh b\u00e1o \u0111\u1ecf v\u00e0 ch\u1eb7n truy c\u1eadp, b\u1ea3o v\u1ec7 t\u00e0i kho\u1ea3n v\u00e0 m\u1eadt kh\u1ea9u c\u1ee7a b\u1ea1n an to\u00e0n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Do-on-dinh-cao\"><\/span>3. \u0110\u1ed9 \u1ed5n \u0111\u1ecbnh cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1eeb khi ra m\u1eaft n\u0103m 2006 \u0111\u1ebfn nay, OpenDNS duy tr\u00ec th\u00e0nh t\u00edch ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c \u0111\u00e1ng kinh ng\u1ea1c. Trong khi DNS c\u1ee7a nh\u00e0 m\u1ea1ng c\u00f3 th\u1ec3 b\u1ecb &#8220;s\u1eadp&#8221; c\u1ee5c b\u1ed9 ho\u1eb7c b\u1ea3o tr\u00ec, g\u00e2y m\u1ea5t m\u1ea1ng d\u00f9 \u0111\u00e8n <a href=\"https:\/\/interdata.vn\/blog\/modem-la-gi\/\">modem<\/a> v\u1eabn s\u00e1ng, th\u00ec OpenDNS v\u1edbi h\u1ea1 t\u1ea7ng ph\u00e2n t\u00e1n to\u00e0n c\u1ea7u \u0111\u1ea3m b\u1ea3o b\u1ea1n lu\u00f4n c\u00f3 k\u1ebft n\u1ed1i. S\u1ef1 \u1ed5n \u0111\u1ecbnh n\u00e0y c\u1ef1c k\u1ef3 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi game th\u1ee7 ho\u1eb7c nh\u1eefng ng\u01b0\u1eddi l\u00e0m vi\u1ec7c tr\u1ef1c tuy\u1ebfn c\u1ea7n \u0111\u01b0\u1eddng truy\u1ec1n li\u00ean t\u1ee5c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Tinh-nang-kiem-soat-phu-huynh-Parental-Control-mien-phi\"><\/span>4. T\u00ednh n\u0103ng ki\u1ec3m so\u00e1t ph\u1ee5 huynh (Parental Control) mi\u1ec5n ph\u00ed<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 \u0111i\u1ec3m b\u00e1n h\u00e0ng \u0111\u1ed9c nh\u1ea5t (USP) c\u1ee7a d\u1ecbch v\u1ee5 OpenDNS so v\u1edbi Google DNS hay Cloudflare. V\u1edbi g\u00f3i FamilyShield ho\u1eb7c OpenDNS Home, b\u1ea1n c\u00f3 quy\u1ec1n ki\u1ec3m so\u00e1t nh\u1eefng g\u00ec \u0111\u01b0\u1ee3c ph\u00e9p hi\u1ec3n th\u1ecb tr\u00ean m\u00e0n h\u00ecnh c\u1ee7a con c\u00e1i. B\u1ea1n kh\u00f4ng c\u1ea7n ph\u1ea3i l\u00e0 m\u1ed9t chuy\u00ean gia IT \u0111\u1ec3 l\u00e0m \u0111i\u1ec1u n\u00e0y. C\u00e1c b\u1ed9 l\u1ecdc \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i s\u1eb5n (Th\u1ea5p, Trung b\u00ecnh, Cao) gi\u00fap vi\u1ec7c c\u1ea5u h\u00ecnh tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n ch\u1ec9 b\u1eb1ng v\u00e0i c\u00fa click chu\u1ed9t.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OpenDNS-co-an-toan-khong\"><\/span>OpenDNS c\u00f3 an to\u00e0n kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>V\u1ea5n \u0111\u1ec1 b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 lu\u00f4n l\u00e0 m\u1ed1i quan t\u00e2m h\u00e0ng \u0111\u1ea7u trong k\u1ef7 nguy\u00ean s\u1ed1. V\u1eady, <strong>OpenDNS c\u00f3 an to\u00e0n kh\u00f4ng<\/strong>?<\/p>\n<p>C\u00e2u tr\u1ea3 l\u1eddi ng\u1eafn g\u1ecdn l\u00e0: <strong>C\u00f3, r\u1ea5t an to\u00e0n v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt v\u00e0 b\u1ea3o m\u1eadt h\u1ea1 t\u1ea7ng.<\/strong><\/p>\n<p>Khi b\u1ea1n s\u1eed d\u1ee5ng OpenDNS, b\u1ea1n \u0111ang \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi <strong>Cisco<\/strong> \u2013 t\u1eadp \u0111o\u00e0n h\u00e0ng \u0111\u1ea7u th\u1ebf gi\u1edbi v\u1ec1 an ninh m\u1ea1ng. C\u00f4ng ngh\u1ec7 \u0111\u1ee9ng sau OpenDNS ch\u00ednh l\u00e0 Cisco Umbrella, m\u1ed9t gi\u1ea3i ph\u00e1p b\u1ea3o m\u1eadt doanh nghi\u1ec7p tr\u1ecb gi\u00e1 h\u00e0ng ng\u00e0n \u0111\u00f4 la. Ng\u01b0\u1eddi d\u00f9ng mi\u1ec5n ph\u00ed \u0111ang \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb ch\u00ednh c\u01a1 s\u1edf d\u1eef li\u1ec7u t\u00ecnh b\u00e1o m\u1ed1i \u0111e d\u1ecda (Threat Intelligence) kh\u1ed5ng l\u1ed3 n\u00e0y.<\/p>\n<p>V\u1ec1 v\u1ea5n \u0111\u1ec1 d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng, OpenDNS cam k\u1ebft kh\u00f4ng b\u00e1n d\u1eef li\u1ec7u duy\u1ec7t web c\u1ee7a b\u1ea1n cho b\u00ean th\u1ee9 ba \u0111\u1ec3 qu\u1ea3ng c\u00e1o \u2013 m\u1ed9t h\u00e0nh vi th\u01b0\u1eddng th\u1ea5y \u1edf c\u00e1c d\u1ecbch v\u1ee5 VPN ho\u1eb7c DNS tr\u00f4i n\u1ed5i mi\u1ec5n ph\u00ed kh\u00e1c.<\/p>\n<p>D\u1eef li\u1ec7u DNS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u l\u1ea1i trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh nh\u1eb1m m\u1ee5c \u0111\u00edch ph\u00e2n t\u00edch b\u1ea3o m\u1eadt v\u00e0 c\u1ea3i thi\u1ec7n d\u1ecbch v\u1ee5 (v\u00ed d\u1ee5: ph\u00e1t hi\u1ec7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng m\u1edbi), nh\u01b0ng ch\u00fang \u0111\u01b0\u1ee3c x\u1eed l\u00fd v\u1edbi quy tr\u00ecnh nghi\u00eam ng\u1eb7t.<\/p>\n<p>Tuy nhi\u00ean, b\u1ea1n c\u1ea7n hi\u1ec3u r\u1eb1ng OpenDNS kh\u00f4ng ph\u1ea3i l\u00e0 VPN. D\u1ecbch v\u1ee5 n\u00e0y kh\u00f4ng \u1ea9n \u0111\u1ecba ch\u1ec9 IP c\u1ee7a b\u1ea1n hay m\u00e3 h\u00f3a to\u00e0n b\u1ed9 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp internet. Nh\u00e0 m\u1ea1ng (ISP) v\u1eabn c\u00f3 th\u1ec3 th\u1ea5y b\u1ea1n \u0111ang ti\u00eau th\u1ee5 bao nhi\u00eau dung l\u01b0\u1ee3ng. Nh\u01b0ng x\u00e9t v\u1ec1 kh\u00eda c\u1ea1nh ng\u0103n ch\u1eb7n m\u00e3 \u0111\u1ed9c, <a href=\"https:\/\/interdata.vn\/blog\/ransomware-la-gi\/\">Ransomware<\/a> (m\u00e3 \u0111\u1ed9c t\u1ed1ng ti\u1ec1n) v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/botnet-la-gi\/\">Botnet<\/a>, OpenDNS l\u00e0 m\u1ed9t trong nh\u1eefng l\u00e1 ch\u1eafn an to\u00e0n nh\u1ea5t hi\u1ec7n nay cho ng\u01b0\u1eddi d\u00f9ng ph\u1ed5 th\u00f4ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Uu-va-nhuoc-diem-cua-OpenDNS\"><\/span>\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a OpenDNS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 c\u00f3 c\u00e1i nh\u00ecn kh\u00e1ch quan nh\u1ea5t v\u1ec1 <strong>OpenDNS<\/strong> v\u00e0 c\u00e2u h\u1ecfi c\u00f3 \u0111\u00e1ng d\u00f9ng kh\u00f4ng, ch\u00fang ta h\u00e3y c\u00f9ng ph\u00e2n t\u00edch b\u1ea3ng \u01b0u nh\u01b0\u1ee3c \u0111i\u1ec3m d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<p><strong>\u01afu \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li><strong>Ho\u00e0n to\u00e0n mi\u1ec5n ph\u00ed:<\/strong> B\u1ea1n kh\u00f4ng m\u1ea5t chi ph\u00ed n\u00e0o cho c\u00e1c t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 m\u1ea1nh m\u1ebd.<\/li>\n<li><strong>Kho d\u1eef li\u1ec7u \u0111en kh\u1ed5ng l\u1ed3:<\/strong> Kh\u1ea3 n\u0103ng nh\u1eadn di\u1ec7n v\u00e0 ch\u1eb7n web x\u1ea5u t\u1ed1t h\u01a1n h\u1eb3n so v\u1edbi c\u00e1c \u0111\u1ed1i th\u1ee7.<\/li>\n<li><strong>T\u00f9y bi\u1ebfn cao:<\/strong> Cho ph\u00e9p \u0111\u0103ng k\u00fd t\u00e0i kho\u1ea3n \u0111\u1ec3 t\u1ef1 t\u1ea1o danh s\u00e1ch ch\u1eb7n\/cho ph\u00e9p (Whitelist\/Blacklist) theo \u00fd mu\u1ed1n.<\/li>\n<li><strong>D\u1ec5 c\u00e0i \u0111\u1eb7t:<\/strong> H\u1ed7 tr\u1ee3 m\u1ecdi thi\u1ebft b\u1ecb t\u1eeb m\u00e1y t\u00ednh, \u0111i\u1ec7n tho\u1ea1i \u0111\u1ebfn Router.<\/li>\n<\/ul>\n<figure id=\"attachment_36858\" aria-describedby=\"caption-attachment-36858\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-36858\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Uu-va-nhuoc-diem-cua-OpenDNS.jpg\" alt=\"\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a OpenDNS\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Uu-va-nhuoc-diem-cua-OpenDNS.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Uu-va-nhuoc-diem-cua-OpenDNS-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Uu-va-nhuoc-diem-cua-OpenDNS-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-36858\" class=\"wp-caption-text\">\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a OpenDNS<\/figcaption><\/figure>\n<p><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li><strong>Quy\u1ec1n ri\u00eang t\u01b0 (Privacy):<\/strong> So v\u1edbi Cloudflare (1.1.1.1) \u2013 \u0111\u01a1n v\u1ecb cam k\u1ebft x\u00f3a log sau 24h, OpenDNS l\u01b0u tr\u1eef log l\u00e2u h\u01a1n \u0111\u1ec3 ph\u1ee5c v\u1ee5 t\u00ednh n\u0103ng b\u00e1o c\u00e1o v\u00e0 ph\u00e2n t\u00edch b\u1ea3o m\u1eadt. Nh\u1eefng ng\u01b0\u1eddi c\u1ef1c k\u1ef3 kh\u1eaft khe v\u1ec1 \u1ea9n danh c\u00f3 th\u1ec3 kh\u00f4ng th\u00edch \u0111i\u1ec1u n\u00e0y.<\/li>\n<li><strong>C\u00f3 th\u1ec3 ch\u1eb7n nh\u1ea7m:<\/strong> \u0110\u00f4i khi c\u01a1 ch\u1ebf l\u1ecdc qu\u00e1 m\u1ea1nh tay khi\u1ebfn m\u1ed9t s\u1ed1 trang web b\u00ecnh th\u01b0\u1eddng b\u1ecb ch\u1eb7n. Tuy nhi\u00ean, b\u1ea1n c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c b\u1eb1ng c\u00e1ch th\u00eam v\u00e0o Whitelist.<\/li>\n<li><strong>T\u1ed1c \u0111\u1ed9 kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng l\u00e0 s\u1ed1 1:<\/strong> \u1ede m\u1ed9t s\u1ed1 khu v\u1ef1c \u0111\u1ecba l\u00fd c\u1ee5 th\u1ec3 t\u1ea1i Vi\u1ec7t Nam, Ping c\u1ee7a OpenDNS c\u00f3 th\u1ec3 cao h\u01a1n Google DNS ho\u1eb7c Cloudflare m\u1ed9t ch\u00fat, d\u00f9 s\u1ef1 ch\u00eanh l\u1ec7ch n\u00e0y r\u1ea5t kh\u00f3 nh\u1eadn ra v\u1edbi ng\u01b0\u1eddi d\u00f9ng th\u00f4ng th\u01b0\u1eddng.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"So-sanh-OpenDNS-Google-DNS-va-Cloudflare-1111\"><\/span>So s\u00e1nh OpenDNS, Google DNS v\u00e0 Cloudflare (1.1.1.1)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng b\u0103n kho\u0103n gi\u1eefa ba &#8220;\u00f4ng l\u1edbn&#8221; n\u00e0y. B\u1ea3ng so s\u00e1nh d\u01b0\u1edbi \u0111\u00e2y s\u1ebd gi\u00fap b\u1ea1n th\u1ea5y r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t v\u00e0 \u0111\u1ecbnh v\u1ecb c\u1ee7a t\u1eebng d\u1ecbch v\u1ee5.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px;\">\n<thead>\n<tr style=\"background: linear-gradient(90deg, #0C40F4, #077FFA, #0497FC); color: #ffffff;\">\n<th style=\"padding: 12px; border: 1px solid #e0e0e0; text-align: left;\">Ti\u00eau ch\u00ed<\/th>\n<th style=\"padding: 12px; border: 1px solid #e0e0e0; text-align: left;\">OpenDNS (Cisco)<\/th>\n<th style=\"padding: 12px; border: 1px solid #e0e0e0; text-align: left;\">Google DNS (8.8.8.8)<\/th>\n<th style=\"padding: 12px; border: 1px solid #e0e0e0; text-align: left;\">Cloudflare (1.1.1.1)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f9fbff;\">\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">T\u1ed1c \u0111\u1ed9 (Speed)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Nhanh, \u1ed5n \u0111\u1ecbnh<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Kh\u00e1 nhanh, c\u00e2n b\u1eb1ng<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">R\u1ea5t nhanh (th\u01b0\u1eddng l\u00e0 s\u1ed1 1)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">B\u1ea3o m\u1eadt (Security)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Xu\u1ea5t s\u1eafc (Ch\u1eb7n Phishing, Malware chuy\u00ean s\u00e2u)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">C\u01a1 b\u1ea3n<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">T\u1ed1t, h\u1ed7 tr\u1ee3 DNS over <a href=\"https:\/\/interdata.vn\/blog\/giao-thuc-https-la-gi\/\">HTTPS<\/a><\/td>\n<\/tr>\n<tr style=\"background: #f9fbff;\">\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Quy\u1ec1n ri\u00eang t\u01b0 (Privacy)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Trung b\u00ecnh (L\u01b0u log \u0111\u1ec3 ph\u00e2n t\u00edch)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Trung b\u00ecnh (Thu th\u1eadp d\u1eef li\u1ec7u \u1ea9n danh)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Cao nh\u1ea5t (Cam k\u1ebft x\u00f3a log 24h)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">L\u1ecdc n\u1ed9i dung (Content Filter)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">C\u00f3 (Ch\u1eb7n web \u0111en, t\u00f9y ch\u1ec9nh m\u1ea1nh m\u1ebd)<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Kh\u00f4ng<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">C\u00f3 (Phi\u00ean b\u1ea3n 1.1.1.3 Family)<\/td>\n<\/tr>\n<tr style=\"background: #f9fbff;\">\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">\u0110\u1ed1i t\u01b0\u1ee3ng ph\u00f9 h\u1ee3p nh\u1ea5t<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Gia \u0111\u00ecnh, Doanh nghi\u1ec7p nh\u1ecf, Ng\u01b0\u1eddi c\u1ea7n an to\u00e0n<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Ng\u01b0\u1eddi d\u00f9ng ph\u1ed5 th\u00f4ng, l\u01b0\u1eddi c\u00e0i \u0111\u1eb7t<\/td>\n<td style=\"padding: 10px; border: 1px solid #e0e0e0;\">Game th\u1ee7, Ng\u01b0\u1eddi th\u00edch ri\u00eang t\u01b0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>K\u1ebft lu\u1eadn so s\u00e1nh:<\/strong><\/p>\n<p>N\u1ebfu b\u1ea1n h\u1ecfi <strong>OpenDNS l\u00e0 g\u00ec<\/strong> trong b\u1ed1i c\u1ea3nh so s\u00e1nh, th\u00ec n\u00f3 l\u00e0 &#8220;ng\u01b0\u1eddi b\u1ea3o v\u1ec7&#8221;.<\/p>\n<ul>\n<li>Ch\u1ecdn <strong>Cloudflare<\/strong> n\u1ebfu b\u1ea1n l\u00e0 game th\u1ee7 c\u1ea7n Ping th\u1ea5p nh\u1ea5t v\u00e0 mu\u1ed1n \u1ea9n danh tuy\u1ec7t \u0111\u1ed1i.<\/li>\n<li>Ch\u1ecdn <strong>Google DNS<\/strong> n\u1ebfu b\u1ea1n ch\u1ec9 mu\u1ed1n m\u1ed9t gi\u1ea3i ph\u00e1p thay th\u1ebf \u0111\u01a1n gi\u1ea3n, d\u1ec5 nh\u1edb.<\/li>\n<li>Ch\u1ecdn <strong>OpenDNS<\/strong> n\u1ebfu b\u1ea1n \u0111\u1eb7t n\u1eb7ng v\u1ea5n \u0111\u1ec1 an to\u00e0n, mu\u1ed1n ch\u1eb7n web \u0111\u1ed9c h\u1ea1i v\u00e0 ki\u1ec3m so\u00e1t vi\u1ec7c s\u1eed d\u1ee5ng internet c\u1ee7a con c\u00e1i.<\/li>\n<\/ul>\n<p>Khi t\u00ecm ki\u1ebfm &#8220;so s\u00e1nh OpenDNS v\u00e0 Google DNS&#8221;, ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng nh\u1eadn th\u1ea5y Google DNS r\u1ea5t d\u1ec5 nh\u1edb v\u00e0 ph\u1ed5 bi\u1ebfn. Tuy nhi\u00ean, Google DNS kh\u00f4ng cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1eb7n web \u0111\u1ed9c h\u1ea1i hay t\u00f9y ch\u1ec9nh b\u1ed9 l\u1ecdc nh\u01b0 OpenDNS. Ng\u01b0\u1ee3c l\u1ea1i, cu\u1ed9c chi\u1ebfn gi\u1eefa &#8220;OpenDNS vs Cloudflare&#8221; th\u01b0\u1eddng nghi\u00eang v\u1ec1 Cloudflare \u1edf kh\u00eda c\u1ea1nh t\u1ed1c \u0111\u1ed9 (ping th\u1ea5p), nh\u01b0ng Cloudflare l\u1ea1i thi\u1ebfu c\u00e1c c\u00f4ng c\u1ee5 qu\u1ea3n l\u00fd chi ti\u1ebft m\u00e0 OpenDNS cung c\u1ea5p cho ng\u01b0\u1eddi d\u00f9ng gia \u0111\u00ecnh.<\/p>\n<div class=\"highlight-cta-box\" style=\"background: #fff5f5; padding: 20px; border-radius: 8px; border: 1px solid #d9534f; text-align: center; margin: 20px 0;\">\n<p style=\"color: #d9534f; margin-top: 0;\"><strong><span style=\"font-size: 120%;\">Tr\u1ea3i nghi\u1ec7m <a href=\"https:\/\/interdata.vn\/blog\/vps-linux-la-gi\/\">VPS Linux<\/a> \u1ed4n \u0111\u1ecbnh &#8211; B\u1ea3o m\u1eadt cao<\/span><\/strong><\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 qu\u1ea3n tr\u1ecb m\u1ea1ng, vi\u1ec7c k\u1ebft h\u1ee3p DNS an to\u00e0n v\u1edbi m\u1ed9t n\u1ec1n t\u1ea3ng m\u00e1y ch\u1ee7 <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh-linux-la-gi\/\">Linux<\/a> m\u1ea1nh m\u1ebd l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft. InterData cung c\u1ea5p VPS Linux v\u1edbi hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u cho m\u1ecdi \u1ee9ng d\u1ee5ng.<\/p>\n<p><a class=\"cta-button\" style=\"display: inline-block; background: #ff6600; color: #fff; padding: 12px 25px; border-radius: 5px; text-decoration: none; font-weight: bold; margin-top: 10px;\" href=\"https:\/\/interdata.vn\/vps-linux\/\">\u0110\u0103ng K\u00fd D\u00f9ng Th\u1eed VPS Linux<\/a><\/p>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Khi-nao-nen-su-dung-OpenDNS\"><\/span>Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng OpenDNS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u1ef1a tr\u00ean nh\u1eefng ph\u00e2n t\u00edch tr\u00ean, InterData g\u1ee3i \u00fd c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf m\u00e0 b\u1ea1n n\u00ean chuy\u1ec3n sang d\u00f9ng OpenDNS ngay l\u1eadp t\u1ee9c:<\/p>\n<ol>\n<li><strong>Gia \u0111\u00ecnh c\u00f3 tr\u1ebb nh\u1ecf:<\/strong> B\u1ea1n kh\u00f4ng th\u1ec3 theo s\u00e1t con 24\/7. C\u00e0i \u0111\u1eb7t OpenDNS FamilyShield l\u00ean Router Wifi s\u1ebd gi\u00fap b\u1ea1n an t\u00e2m r\u1eb1ng con s\u1ebd kh\u00f4ng v\u00f4 t\u00ecnh truy c\u1eadp v\u00e0o c\u00e1c trang web 18+ hay b\u1ea1o l\u1ef1c.<\/li>\n<li><strong>M\u1ea1ng v\u0103n ph\u00f2ng nh\u1ecf:<\/strong> C\u00e1c doanh nghi\u1ec7p SME kh\u00f4ng c\u00f3 chi ph\u00ed cho t\u01b0\u1eddng l\u1eeda \u0111\u1eaft ti\u1ec1n c\u00f3 th\u1ec3 d\u00f9ng OpenDNS \u0111\u1ec3 ng\u0103n nh\u00e2n vi\u00ean truy c\u1eadp c\u00e1c trang m\u1ea1ng x\u00e3 h\u1ed9i trong gi\u1edd l\u00e0m vi\u1ec7c ho\u1eb7c ch\u1eb7n c\u00e1c link ch\u1ee9a m\u00e3 \u0111\u1ed9c, tr\u00e1nh r\u1ee7i ro m\u1ea5t d\u1eef li\u1ec7u c\u00f4ng ty.<\/li>\n<li><strong>Khi m\u1ea1ng nh\u00e0 m\u1ea1ng qu\u00e1 t\u1ec7:<\/strong> N\u1ebfu b\u1ea1n th\u01b0\u1eddng xuy\u00ean g\u1eb7p l\u1ed7i &#8220;DNS Server Not Responding&#8221; ho\u1eb7c kh\u00f4ng v\u00e0o \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 trang web qu\u1ed1c t\u1ebf (nh\u01b0 Facebook, Blogspot) do nh\u00e0 m\u1ea1ng ch\u1eb7n, d\u1ecbch v\u1ee5 OpenDNS l\u00e0 gi\u1ea3i ph\u00e1p &#8220;c\u1ee9u c\u00e1nh&#8221; hi\u1ec7u qu\u1ea3.<\/li>\n<li><strong>M\u00e1y t\u00ednh th\u01b0\u1eddng xuy\u00ean c\u00e0i ph\u1ea7n m\u1ec1m l\u1ea1:<\/strong> N\u1ebfu b\u1ea1n hay t\u1ea3i t\u00e0i li\u1ec7u t\u1eeb nhi\u1ec1u ngu\u1ed3n, l\u1edbp b\u1ea3o m\u1eadt c\u1ee7a OpenDNS s\u1ebd gi\u00fap ch\u1eb7n k\u1ebft n\u1ed1i \u0111\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 \u0111i\u1ec1u khi\u1ec3n m\u00e3 \u0111\u1ed9c (C&amp;C Server) n\u1ebfu l\u1ee1 m\u00e1y b\u1ea1n b\u1ecb nhi\u1ec5m virus.<\/li>\n<\/ol>\n<figure id=\"attachment_36860\" aria-describedby=\"caption-attachment-36860\" style=\"width: 450px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-36860 size-full\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Khi-nao-nen-su-dung-OpenDNS.jpg\" alt=\"Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng OpenDNS\" width=\"450\" height=\"205\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Khi-nao-nen-su-dung-OpenDNS.jpg 450w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/12\/Khi-nao-nen-su-dung-OpenDNS-300x137.jpg 300w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><figcaption id=\"caption-attachment-36860\" class=\"wp-caption-text\">Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng OpenDNS?<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"OpenDNS-phu-hop-voi-ai\"><\/span>OpenDNS ph\u00f9 h\u1ee3p v\u1edbi ai?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u00f3m l\u1ea1i, ch\u00e2n dung ng\u01b0\u1eddi d\u00f9ng ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi OpenDNS bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Ph\u1ee5 huynh th\u1eddi c\u00f4ng ngh\u1ec7:<\/strong> Nh\u1eefng ng\u01b0\u1eddi mu\u1ed1n b\u1ea3o v\u1ec7 con c\u00e1i tr\u00ean m\u00f4i tr\u01b0\u1eddng m\u1ea1ng nh\u01b0ng kh\u00f4ng r\u00e0nh k\u1ef9 thu\u1eadt ph\u1ee9c t\u1ea1p.<\/li>\n<li><strong>Ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng chuy\u00ean (Non-tech):<\/strong> C\u1ea7n m\u1ed9t gi\u1ea3i ph\u00e1p &#8220;c\u00e0i m\u1ed9t l\u1ea7n, d\u00f9ng m\u00e3i m\u00e3i&#8221;, \u1ed5n \u0111\u1ecbnh v\u00e0 \u00edt l\u1ed7i v\u1eb7t.<\/li>\n<li><strong>Qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng (IT Admin) t\u1ea1i c\u00e1c qu\u00e1n cafe, tr\u01b0\u1eddng h\u1ecdc:<\/strong> C\u1ea7n ch\u1eb7n c\u00e1c trang web ng\u1ed1n <a href=\"https:\/\/interdata.vn\/blog\/bang-thong-la-gi\/\">b\u0103ng th\u00f4ng<\/a> ho\u1eb7c kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f4ng c\u1ed9ng.<\/li>\n<\/ul>\n<p>N\u1ebfu b\u1ea1n l\u00e0 m\u1ed9t Hacker, m\u1ed9t chuy\u00ean gia b\u1ea3o m\u1eadt c\u1ea7n \u1ea9n danh tuy\u1ec7t \u0111\u1ed1i ho\u1eb7c m\u1ed9t game th\u1ee7 chuy\u00ean nghi\u1ec7p \u0111\u1ebfm t\u1eebng miligi\u00e2y \u0111\u1ed9 tr\u1ec5, c\u00f3 th\u1ec3 c\u00e1c gi\u1ea3i ph\u00e1p VPN tr\u1ea3 ph\u00ed ho\u1eb7c Cloudflare s\u1ebd ph\u00f9 h\u1ee3p h\u01a1n. Nh\u01b0ng v\u1edbi \u0111\u1ea1i \u0111a s\u1ed1 ng\u01b0\u1eddi d\u00f9ng ph\u1ed5 th\u00f4ng t\u1ea1i Vi\u1ec7t Nam, OpenDNS l\u00e0 s\u1ef1 c\u00e2n b\u1eb1ng ho\u00e0n h\u1ea3o gi\u1eefa Hi\u1ec7u n\u0103ng v\u00e0 An to\u00e0n.<\/p>\n<div class=\"highlight-cta-box\" style=\"background: #fff5f5; padding: 20px; border-radius: 8px; border: 1px solid #d9534f; text-align: center; margin: 20px 0;\">\n<p style=\"color: #d9534f; margin-top: 0;\"><strong><span style=\"font-size: 120%;\">VPS Platinum &#8211; \u0110\u1eb3ng c\u1ea5p Hi\u1ec7u n\u0103ng cho Doanh nghi\u1ec7p<\/span><\/strong><\/p>\n<p>Doanh nghi\u1ec7p c\u1ee7a b\u1ea1n c\u1ea7n h\u1ea1 t\u1ea7ng m\u1ea1nh m\u1ebd h\u01a1n? G\u00f3i VPS Platinum c\u1ee7a InterData mang \u0111\u1ebfn t\u00e0i nguy\u00ean kh\u1ee7ng, b\u0103ng th\u00f4ng kh\u00f4ng gi\u1edbi h\u1ea1n v\u00e0 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt 24\/7.<br \/>\n<a class=\"cta-button\" style=\"display: inline-block; background: #ff6600; color: #fff; padding: 12px 25px; border-radius: 5px; text-decoration: none; font-weight: bold; margin-top: 10px;\" href=\"https:\/\/interdata.vn\/platinum\/\">Kh\u00e1m Ph\u00e1 VPS Platinum<\/a><\/p>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Cach-doi-DNS-sang-OpenDNS-tren-cac-thiet-bi-pho-bien\"><\/span>C\u00e1ch \u0111\u1ed5i DNS sang OpenDNS tr\u00ean c\u00e1c thi\u1ebft b\u1ecb ph\u1ed5 bi\u1ebfn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Cach-doi-DNS-OpenDNS-tren-Windows\"><\/span>C\u00e1ch \u0111\u1ed5i DNS OpenDNS tr\u00ean Windows<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 thay \u0111\u1ed5i DNS sang OpenDNS tr\u00ean Windows, b\u1ea1n th\u1ef1c hi\u1ec7n theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<p><strong>B\u01b0\u1edbc 1:<\/strong> M\u1edf <strong>Control Panel<\/strong> v\u00e0 truy c\u1eadp v\u00e0o <strong>Network and Sharing Center<\/strong>.<br \/>\n<strong>B\u01b0\u1edbc 2:<\/strong> Ch\u1ecdn <strong>Change adapter settings<\/strong> \u1edf menu b\u00ean tr\u00e1i.<br \/>\n<strong>B\u01b0\u1edbc 3:<\/strong> Nh\u1ea5p chu\u1ed9t ph\u1ea3i v\u00e0o k\u1ebft n\u1ed1i \u0111ang s\u1eed d\u1ee5ng, ch\u1ecdn <strong>Properties<\/strong>, sau \u0111\u00f3 nh\u00e1y \u0111\u00fap v\u00e0o <strong>Internet Protocol Version 4 (TCP\/IPv4)<\/strong>.<br \/>\n<strong>B\u01b0\u1edbc 4:<\/strong> T\u00edch ch\u1ecdn <strong>Use the following DNS server addresses<\/strong>, r\u1ed3i nh\u1eadp:<\/p>\n<ul>\n<li><strong>Preferred DNS server:<\/strong> 208.67.222.222<\/li>\n<li><strong>Alternative DNS server:<\/strong> 208.67.220.220<\/li>\n<\/ul>\n<p><strong>B\u01b0\u1edbc 5:<\/strong> Nh\u1ea5n <strong>OK<\/strong> \u0111\u1ec3 ho\u00e0n t\u1ea5t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cach-doi-DNS-OpenDNS-tren-macOS\"><\/span>C\u00e1ch \u0111\u1ed5i DNS OpenDNS tr\u00ean macOS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed1i v\u1edbi macOS, b\u1ea1n th\u1ef1c hi\u1ec7n theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc 1:<\/strong> Truy c\u1eadp <strong>System Settings<\/strong> v\u00e0 ch\u1ecdn <strong>Network<\/strong>.<\/li>\n<li><strong>B\u01b0\u1edbc 2:<\/strong> Ch\u1ecdn k\u1ebft n\u1ed1i <strong>Wi-Fi<\/strong> ho\u1eb7c <strong>Ethernet<\/strong> c\u1ea7n thay \u0111\u1ed5i, nh\u1ea5n <strong>Details\u2026<\/strong>, sau \u0111\u00f3 chuy\u1ec3n sang tab <strong>DNS<\/strong>.<\/li>\n<li><strong>B\u01b0\u1edbc 3:<\/strong> Nh\u1ea5n d\u1ea5u <strong>+<\/strong> \u0111\u1ec3 th\u00eam \u0111\u1ecba ch\u1ec9 IP OpenDNS, x\u00e1c nh\u1eadn <strong>OK<\/strong> v\u00e0 k\u00e9o IP v\u1eeba th\u00eam l\u00ean \u0111\u1ea7u danh s\u00e1ch n\u1ebfu mu\u1ed1n \u01b0u ti\u00ean.<\/li>\n<li><strong>B\u01b0\u1edbc 4:<\/strong> Nh\u1ea5n <strong>Apply<\/strong> \u0111\u1ec3 \u00e1p d\u1ee5ng c\u1ea5u h\u00ecnh.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Cach-doi-DNS-OpenDNS-tren-dien-thoai-AndroidiOS\"><\/span>C\u00e1ch \u0111\u1ed5i DNS OpenDNS tr\u00ean \u0111i\u1ec7n tho\u1ea1i Android\/iOS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 thay \u0111\u1ed5i DNS OpenDNS tr\u00ean \u0111i\u1ec7n tho\u1ea1i Android ho\u1eb7c iOS, b\u1ea1n th\u1ef1c hi\u1ec7n nh\u01b0 sau:<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc 1:<\/strong> V\u00e0o <strong>C\u00e0i \u0111\u1eb7t Wi-Fi<\/strong>, ch\u1ecdn m\u1ea1ng \u0111ang k\u1ebft n\u1ed1i v\u00e0 m\u1edf ph\u1ea7n t\u00f9y ch\u1ec9nh m\u1ea1ng.<\/li>\n<li><strong>B\u01b0\u1edbc 2:<\/strong> Chuy\u1ec3n c\u1ea5u h\u00ecnh DNS sang ch\u1ebf \u0111\u1ed9 <strong>th\u1ee7 c\u00f4ng<\/strong>.<\/li>\n<li><strong>B\u01b0\u1edbc 3:<\/strong> Nh\u1eadp \u0111\u1ecba ch\u1ec9 IP OpenDNS v\u00e0o m\u1ee5c th\u00eam m\u00e1y ch\u1ee7, sau \u0111\u00f3 l\u01b0u l\u1ea1i \u0111\u1ec3 ho\u00e0n t\u1ea5t c\u00e0i \u0111\u1eb7t.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cach-thiet-lap-OpenDNS-tung-buoc-chi-tiet\"><\/span>C\u00e1ch thi\u1ebft l\u1eadp OpenDNS t\u1eebng b\u01b0\u1edbc chi ti\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 thi\u1ebft l\u1eadp OpenDNS, b\u1ea1n ch\u1ec9 c\u1ea7n th\u1ef1c hi\u1ec7n l\u1ea7n l\u01b0\u1ee3t c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc 1<\/strong>: Truy c\u1eadp v\u00e0o website OpenDNS v\u00e0 ti\u1ebfn h\u00e0nh t\u1ea1o t\u00e0i kho\u1ea3n theo h\u01b0\u1edbng d\u1eabn \u0111\u0103ng k\u00fd.<\/li>\n<li><strong>B\u01b0\u1edbc 2<\/strong>: Sau khi \u0111\u0103ng k\u00fd th\u00e0nh c\u00f4ng, b\u1ea1n ch\u1ecdn lo\u1ea1i thi\u1ebft b\u1ecb c\u1ea7n thi\u1ebft l\u1eadp, ch\u1eb3ng h\u1ea1n nh\u01b0 home routers n\u1ebfu mu\u1ed1n c\u00e0i \u0111\u1eb7t OpenDNS cho router gia \u0111\u00ecnh.<\/li>\n<li><strong>B\u01b0\u1edbc 3<\/strong>: Ti\u1ebfp theo, ch\u1ecdn \u0111\u00fang nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 m\u1eabu router \u0111ang s\u1eed d\u1ee5ng \u0111\u1ec3 nh\u1eadn h\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t ph\u00f9 h\u1ee3p cho t\u1eebng thi\u1ebft b\u1ecb.<\/li>\n<li><strong>B\u01b0\u1edbc 4<\/strong>: Ho\u00e0n t\u1ea5t c\u00e1c b\u01b0\u1edbc \u0111\u0103ng k\u00fd v\u00e0 x\u00e1c nh\u1eadn t\u00e0i kho\u1ea3n th\u00f4ng qua email \u0111\u01b0\u1ee3c g\u1eedi v\u1ec1 h\u1ed9p th\u01b0 c\u1ee7a b\u1ea1n.<\/li>\n<li><strong>B\u01b0\u1edbc 5<\/strong>: \u0110\u0103ng nh\u1eadp v\u00e0o dashboard qu\u1ea3n l\u00fd, truy c\u1eadp m\u1ee5c <strong>Settings<\/strong>, ch\u1ecdn <strong>Add a network<\/strong> v\u00e0 nh\u1ea5n<strong> Add this network<\/strong> \u0111\u1ec3 h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng nh\u1eadn di\u1ec7n \u0111\u1ecba ch\u1ec9 IP m\u1ea1ng.<\/li>\n<li><strong>B\u01b0\u1edbc 6<\/strong>: \u0110\u1eb7t t\u00ean nh\u1eadn di\u1ec7n cho m\u1ea1ng, ch\u1ecdn <strong>Dynamic IP<\/strong> n\u1ebfu s\u1eed d\u1ee5ng cho m\u1ea1ng gia \u0111\u00ecnh. Tr\u01b0\u1eddng h\u1ee3p d\u00f9ng trong doanh nghi\u1ec7p, b\u1ea1n c\u00f3 th\u1ec3 trao \u0111\u1ed5i v\u1edbi qu\u1ea3n tr\u1ecb m\u1ea1ng \u0111\u1ec3 ch\u1ecdn lo\u1ea1i IP ph\u00f9 h\u1ee3p.<\/li>\n<li><strong>B\u01b0\u1edbc 7<\/strong>: Nh\u1ea5n <strong>Done<\/strong> \u0111\u1ec3 ho\u00e0n t\u1ea5t qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp m\u1ea1ng v\u1edbi OpenDNS.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Nhung-cau-hoi-thuong-gap-FAQ\"><\/span>Nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong qu\u00e1 tr\u00ecnh t\u00ecm hi\u1ec3u <strong>OpenDNS l\u00e0 g\u00ec<\/strong>, ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng g\u1eedi v\u1ec1 InterData nh\u1eefng th\u1eafc m\u1eafc sau:<\/p>\n<p><strong>1. OpenDNS c\u00f3 mi\u1ec5n ph\u00ed kh\u00f4ng?<\/strong><\/p>\n<p>C\u00f3. G\u00f3i d\u1ecbch v\u1ee5 OpenDNS Home v\u00e0 OpenDNS FamilyShield ho\u00e0n to\u00e0n mi\u1ec5n ph\u00ed cho ng\u01b0\u1eddi d\u00f9ng c\u00e1 nh\u00e2n. H\u1ecd c\u0169ng cung c\u1ea5p c\u00e1c g\u00f3i VIP ho\u1eb7c g\u00f3i d\u00e0nh cho doanh nghi\u1ec7p (Cisco Umbrella) v\u1edbi t\u00ednh n\u0103ng b\u00e1o c\u00e1o chuy\u00ean s\u00e2u v\u00e0 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt 24\/7 c\u00f3 t\u00ednh ph\u00ed.<\/p>\n<p><strong>2. S\u1eed d\u1ee5ng OpenDNS c\u00f3 b\u1ecb theo d\u00f5i kh\u00f4ng?<\/strong><\/p>\n<p>OpenDNS thu th\u1eadp th\u00f4ng tin DNS \u0111\u1ec3 ph\u00e2n t\u00edch c\u00e1c m\u1ed1i \u0111e d\u1ecda b\u1ea3o m\u1eadt. H\u1ecd cam k\u1ebft kh\u00f4ng chia s\u1ebb th\u00f4ng tin c\u00e1 nh\u00e2n c\u1ee7a b\u1ea1n. Tuy nhi\u00ean, n\u1ebfu b\u1ea1n so s\u00e1nh v\u1edbi ti\u00eau chu\u1ea9n &#8220;No-logs&#8221; (Kh\u00f4ng l\u01b0u nh\u1eadt k\u00fd) c\u1ee7a m\u1ed9t s\u1ed1 d\u1ecbch v\u1ee5 \u1ea9n danh, OpenDNS kh\u00f4ng ho\u00e0n to\u00e0n \u1ea9n danh 100%. M\u1ee9c \u0111\u1ed9 theo d\u00f5i n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 an ninh m\u1ea1ng.<\/p>\n<p><strong>3. T\u1ea1i sao t\u00f4i \u0111\u1ed5i DNS r\u1ed3i m\u00e0 v\u1eabn v\u00e0o \u0111\u01b0\u1ee3c web b\u1ecb ch\u1eb7n?<\/strong><\/p>\n<p>L\u1ed7i n\u00e0y th\u01b0\u1eddng do b\u1ed9 nh\u1edb \u0111\u1ec7m (DNS Cache) tr\u00ean m\u00e1y t\u00ednh ho\u1eb7c tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n v\u1eabn l\u01b0u th\u00f4ng tin c\u0169.<\/p>\n<p>C\u00e1ch x\u1eed l\u00fd: Sau khi \u0111\u1ed5i DNS, b\u1ea1n h\u00e3y m\u1edf CMD (Command Prompt) tr\u00ean Windows v\u00e0 g\u00f5 l\u1ec7nh ipconfig \/flushdns r\u1ed3i \u1ea5n Enter. Ho\u1eb7c \u0111\u01a1n gi\u1ea3n h\u01a1n l\u00e0 kh\u1edfi \u0111\u1ed9ng l\u1ea1i m\u00e1y t\u00ednh v\u00e0 Router \u0111\u1ec3 thi\u1ebft l\u1eadp m\u1edbi c\u00f3 hi\u1ec7u l\u1ef1c.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Loi-ket\"><\/span>L\u1eddi k\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Qua b\u00e0i vi\u1ebft n\u00e0y, InterData hy v\u1ecdng b\u1ea1n \u0111\u00e3 hi\u1ec3u r\u00f5 <strong>OpenDNS l\u00e0 g\u00ec<\/strong> c\u0169ng nh\u01b0 s\u1ee9c m\u1ea1nh ti\u1ec1m \u1ea9n c\u1ee7a nh\u1eefng d\u00e3y s\u1ed1 \u0111\u1ecba ch\u1ec9 IP t\u01b0\u1edfng ch\u1eebng v\u00f4 tri n\u00e0y. Trong b\u1ed1i c\u1ea3nh internet \u0111\u1ea7y r\u1eaby r\u1ee7i ro v\u00e0 n\u1ed9i dung \u0111\u1ed9c h\u1ea1i, vi\u1ec7c trang b\u1ecb m\u1ed9t &#8220;ng\u01b0\u1eddi g\u00e1c c\u1ed5ng&#8221; tin c\u1eady nh\u01b0 OpenDNS l\u00e0 \u0111i\u1ec1u c\u1ef1c k\u1ef3 c\u1ea7n thi\u1ebft.<\/p>\n<p>Kh\u00f4ng ch\u1ec9 gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 l\u01b0\u1edbt web, OpenDNS c\u00f2n l\u00e0 c\u00f4ng c\u1ee5 mi\u1ec5n ph\u00ed t\u1ed1t nh\u1ea5t \u0111\u1ec3 b\u1ea3o v\u1ec7 gia \u0111\u00ecnh b\u1ea1n kh\u1ecfi nh\u1eefng m\u1eb7t tr\u00e1i c\u1ee7a internet. N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm s\u1ef1 an to\u00e0n v\u00e0 quy\u1ec1n ki\u1ec3m so\u00e1t, h\u00e3y th\u1eed thi\u1ebft l\u1eadp OpenDNS ngay h\u00f4m nay. \u0110\u1eb7c bi\u1ec7t v\u1edbi phi\u00ean b\u1ea3n FamilyShield, s\u1ef1 b\u00ecnh y\u00ean cho con tr\u1ebb tr\u00ean kh\u00f4ng gian m\u1ea1ng n\u1eb1m ngay trong t\u1ea7m tay b\u1ea1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u00f3m t\u1eaft n\u1ed9i dung: OpenDNS l\u00e0 d\u1ecbch v\u1ee5 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n (DNS) gi\u00fap chuy\u1ec3n \u0111\u1ed5i t\u00ean mi\u1ec1n website th\u00e0nh \u0111\u1ecba ch\u1ec9 IP, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p c\u00e1c l\u1edbp b\u1ea3o m\u1eadt m\u1ea1ng \u0111\u1ec3 ng\u0103n ch\u1eb7n l\u1eeba \u0111\u1ea3o v\u00e0 l\u1ecdc n\u1ed9i dung \u0111\u1ed9c h\u1ea1i. B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p \u0111\u1ecba ch\u1ec9 IP m\u1edbi nh\u1ea5t, h\u01b0\u1edbng d\u1eabn<\/p>\n","protected":false},"author":11,"featured_media":36861,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[58],"tags":[],"class_list":["post-36853","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/36853","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=36853"}],"version-history":[{"count":6,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/36853\/revisions"}],"predecessor-version":[{"id":39358,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/36853\/revisions\/39358"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/36861"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=36853"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=36853"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=36853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}