{"id":10731,"date":"2024-06-04T09:58:57","date_gmt":"2024-06-04T02:58:57","guid":{"rendered":"https:\/\/cloud.z.com\/vn\/?p=10731"},"modified":"2024-05-20T10:04:59","modified_gmt":"2024-05-20T03:04:59","slug":"bao-mat-dns","status":"publish","type":"post","link":"https:\/\/cloud.z.com\/vn\/en\/news\/bao-mat-dns\/","title":{"rendered":"T\u1eeb A-Z v\u1ec1 b\u1ea3o m\u1eadt DNS b\u1eb1ng DoH, DoT, DNSCrypt hay DNSSEC"},"content":{"rendered":"<p>B\u1ea3o m\u1eadt DNS l\u00e0 m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 \u0111\u01b0\u1ee3c quan t\u00e2m h\u00e0ng \u0111\u1ea7u trong l\u0129nh v\u1ef1c an ninh m\u1ea1ng.<\/p>\n<p>B\u1edfi DNS v\u1ec1 c\u01a1 b\u1ea3n ch\u00ednh l\u00e0 danh b\u1ea1 \u0111\u1ecba ch\u1ec9 c\u1ee7a internet. Tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng DNS \u0111\u1ec3 t\u00ecm IP cho m\u1ed9t website c\u1ee5 th\u1ec3. V\u00ed d\u1ee5, khi b\u1ea1n nh\u1eadp \u0111\u1ecba ch\u1ec9 Z.com, tr\u00ecnh duy\u1ec7t s\u1ebd truy v\u1ea5n d\u1ecbch v\u1ee5 DNS \u0111\u1ec3 t\u00ecm c\u00e1c m\u00e1y ch\u1ee7 t\u01b0\u01a1ng \u1ee9ng, gi\u00fap ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng ph\u1ea3i nh\u1edb nh\u1eefng \u0111\u1ecba ch\u1ec9 IP ph\u1ee9c t\u1ea1p c\u1ee7a t\u1eebng website m\u00e0 h\u1ecd mu\u1ed1n truy c\u1eadp.<\/p>\n<p>Tuy nhi\u00ean, s\u1ef1 ti\u1ec7n l\u1ee3i lu\u00f4n \u0111i k\u00e8m r\u1ee7i ro, v\u00e0 hacker hi\u1ec3n nhi\u00ean kh\u00f4ng th\u1ec3 b\u1ecf qua \u201cmi\u1ebfng m\u1ed3i ngon\u201d DNS trong qu\u00e1 tr\u00ecnh ti\u1ebfn h\u00e0nh nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u v\u1ec1 nh\u1eefng k\u1ef9 thu\u1eadt b\u1ea3o m\u1eadt DNS \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb tr\u00ean to\u00e0n th\u1ebf gi\u1edbi.<\/p>\n<p><span style=\"font-weight: 400;\">Xem th\u00eam: <\/span><a href=\"https:\/\/cloud.z.com\/vn\/news\/dns\/\"><span style=\"font-weight: 400;\">DNS l\u00e0 g\u00ec? T\u1eeb A-Z v\u1ec1 DNS Google, DNS Server, DNS VNPT<\/span><\/a><\/p>\n<div class=\"tg_wrap_cbsv tg_wrap_cbsv_blue\" style=\"margin: 20px 0px; border-radius: 4px; border: 2px solid #0066b2;\"><cite style=\"margin: 0px; background-color: #0066b2; color: #fff; border-top-left-radius: 2px; border-top-right-radius: 2px; font-size: 19px; padding: 12px 20px; font-weight: bold; display: block; font-style: normal;\">B\u1ea1n \u0111ang mu\u1ed1n x\u00e2y d\u1ef1ng m\u1ed9t trang web c\u1ee7a ri\u00eang m\u00ecnh<\/cite><\/p>\n<div class=\"textwidget\" style=\"padding: 20px; background: #70c2e280;\">\u0110\u0103ng k\u00fd ngay t\u00ean mi\u1ec1n th\u01b0\u01a1ng hi\u1ec7u t\u1ea1i Tenten.vn ch\u1ec9 v\u1edbi 2 c\u00fa click chu\u1ed9t: <strong>Ki\u1ec3m tra s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a t\u00ean mi\u1ec1n: Nh\u1eadp t\u00ean mi\u1ec1n v\u00e0 nh\u1ea5n \"ki\u1ec3m tra\".<\/strong> <span style=\"color: #ffff00;\"><a class=\"btn_combi_sv\" style=\"font-weight: bold; color: #ffff00; padding: 8px 26px 8px 26px; font-size: 20px; line-height: 30px; border-radius: 56px; text-shadow: none; background: #0066b2; display: table; margin: 0px auto;\" href=\"https:\/\/tenten.vn\/vi\/bang-gia-ten-mien?code=knjcpEfWoTSzUNMw&amp;idCampaign=3080\">B\u1ea2NG GI\u00c1 T\u00caN MI\u1ec0N M\u1edaI NH\u1ea4T<\/a><\/span><\/p>\n<ul>\n<li><a href=\"https:\/\/bit.ly\/3QYbaqa\">V\u00e0o nh\u00f3m Zalo nh\u1eadn \u01b0u \u0111\u00e3i t\u00ean mi\u1ec1n t\u1ea1i \u0111\u00e2y<\/a><\/li>\n<li>Hotline: (024) 71 089 999<\/li>\n<li>Email: info@tenten.vn<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<h3>5 kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n li\u00ean quan b\u1ea3o m\u1eadt DNS<\/h3>\n<p>\u0110\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c c\u01a1 ch\u1ebf c\u1ee7a b\u1ea3o m\u1eadt DNS, b\u1ea1n c\u1ea7n hi\u1ec3u DNS l\u00e0 g\u00ec v\u00e0 n\u00f3 ho\u1ea1t \u0111\u1ed9ng ra sao. C\u00f3 th\u1ec3 gi\u1ea3i th\u00edch ng\u1eafn g\u1ecdn nh\u01b0 sau:<\/p>\n<p>- M\u1ed7i thi\u1ebft b\u1ecb khi k\u1ebft n\u1ed1i v\u00e0o m\u1ea1ng internet s\u1ebd c\u00f3 m\u1ed9t \u0111\u1ecba ch\u1ec9 IP \u0111\u1ed9c nh\u1ea5t, \u0111\u1ec3 c\u00e1c m\u00e1y kh\u00e1c t\u00ecm th\u1ea5y v\u00e0 nh\u1eadn di\u1ec7n ch\u00fang. \u0110\u1ecba ch\u1ec9 IP l\u00e0 m\u1ed9t d\u00e3y s\u1ed1 ph\u00e2n t\u00e1ch b\u1edfi c\u00e1c d\u1ea5u ch\u1ea5m.<\/p>\n<p>- DNS cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng \u201cqu\u00ean \u0111i\u201d nh\u1eefng \u0111\u1ecba ch\u1ec9 IP ph\u1ee9c t\u1ea1p \u0111\u00f3.<\/p>\n<p>- M\u1ed7i khi b\u1ea1n duy\u1ec7t web, nhi\u1ec1u m\u00e1y ch\u1ee7 DNS \u0111\u01b0\u1ee3c truy v\u1ea5n tr\u01b0\u1edbc khi b\u1ea1n th\u1ef1c s\u1ef1 th\u1ea5y \u0111\u01b0\u1ee3c n\u1ed9i dung website mu\u1ed1n xem.<\/p>\n<p>- Quy tr\u00ecnh \u0111\u00f3 bao g\u1ed3m phi\u00ean d\u1ecbch t\u00ean mi\u1ec1n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP (g\u1ecdi l\u00e0 DNS lookup) v\u00e0 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi c\u00e1c d\u1ecbch v\u1ee5 ph\u00e2n gi\u1ea3i DNS (DNS resolver).<\/p>\n<p>- DNS cache, hay DNS resolver cache, l\u00e0 m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u ch\u1ee9a c\u00e1c l\u01b0\u1ee3t DNS lookup g\u1ea7n nh\u1ea5t. B\u1edfi c\u00f3 nhi\u1ec1u cache kh\u00e1c nhau \u1edf c\u00e1c c\u1ea5p \u0111\u1ed9 kh\u00e1c nhau, th\u00f4ng th\u01b0\u1eddng b\u1ea1n s\u1ebd ph\u1ea3i \u0111\u1ee3i m\u1ed9t qu\u00e1 tr\u00ecnh g\u1ecdi l\u00e0 lan truy\u1ec1n DNS (DNS propagation) \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n m\u1ed7i khi t\u1ea1o ho\u1eb7c c\u1eadp nh\u1eadt c\u00e1c ch\u1ec9 m\u1ee5c DNS.<\/p>\n<p><img class=\"wp-image-23754\" src=\"https:\/\/www.hostify.vn\/blog\/wp-content\/uploads\/2024\/05\/bao-mat-dns-2.png\" alt=\"b\u1ea3o m\u1eadt DNS 2\" \/><\/p>\n<h3>C\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng DNS ph\u1ed5 bi\u1ebfn<\/h3>\n<p>Danh s\u00e1ch d\u01b0\u1edbi \u0111\u00e2y c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7, nh\u01b0ng ch\u00fang l\u00e0 nh\u1eefng ki\u1ec3u t\u1ea5n c\u00f4ng th\u01b0\u1eddng th\u1ea5y nh\u1ea5t m\u00e0 c\u00e1c hacker s\u1eed d\u1ee5ng \u0111\u1ec3 can thi\u1ec7p b\u1ea3o m\u1eadt DNS:<\/p>\n<p>- DNS Spoofing (DNS Cache Poisoning): Khi m\u1ed9t k\u1ebb t\u1ea5n c\u00f4ng g\u1eedi th\u00f4ng tin DNS sai l\u1ec7ch \u0111\u1ebfn m\u1ed9t DNS resolver, l\u00e0m cho resolver l\u01b0u tr\u1eef th\u00f4ng tin sai trong b\u1ed9 nh\u1edb cache c\u1ee7a n\u00f3. Khi \u0111\u00f3, m\u1ecdi y\u00eau c\u1ea7u DNS t\u01b0\u01a1ng t\u1ef1 s\u1ebd tr\u1ea3 v\u1ec1 th\u00f4ng tin sai t\u1eeb b\u1ed9 nh\u1edb cache, d\u1eabn \u0111\u1ebfn vi\u1ec7c chuy\u1ec3n h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn c\u00e1c trang web \u0111\u1ed9c h\u1ea1i ho\u1eb7c ti\u1ebfn h\u00e0nh t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o.<\/p>\n<p>- DNS Amplification Attack: T\u1ea5n c\u00f4ng n\u00e0y s\u1eed d\u1ee5ng c\u00e1c server DNS c\u1ed9ng h\u01b0\u1edfng \u0111\u1ec3 t\u1ea1o ra l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn t\u1edbi m\u1ed9t m\u1ee5c ti\u00eau c\u1ee5 th\u1ec3. K\u1ebb t\u1ea5n c\u00f4ng g\u1eedi c\u00e1c y\u00eau c\u1ea7u gi\u1ea3 m\u1ea1o v\u1edbi \u0111\u1ecba ch\u1ec9 IP ng\u01b0\u1eddi b\u1ecb t\u1ea5n c\u00f4ng l\u00e0m ngu\u1ed3n, v\u00e0 c\u00e1c server DNS c\u1ed9ng h\u01b0\u1edfng s\u1ebd g\u1eedi c\u00e1c ph\u1ea3n h\u1ed3i l\u1edbn t\u1edbi ng\u01b0\u1eddi b\u1ecb t\u1ea5n c\u00f4ng, t\u0103ng l\u01b0\u1ee3ng l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng v\u00e0 c\u00f3 th\u1ec3 l\u00e0m qu\u00e1 t\u1ea3i h\u1ec7 th\u1ed1ng c\u1ee7a n\u1ea1n nh\u00e2n.<\/p>\n<p>- DNS Tunneling: K\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng giao th\u1ee9c DNS \u0111\u1ec3 truy c\u1eadp v\u00e0o m\u1ea1ng m\u1ee5c ti\u00eau ho\u1eb7c truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch b\u00ed m\u1eadt. K\u1ef9 thu\u1eadt n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bypass c\u00e1c bi\u1ec7n ph\u00e1p ki\u1ec3m so\u00e1t m\u1ea1ng ho\u1eb7c \u0111\u1ec3 t\u1ea1o ra c\u00e1c k\u00eanh truy\u1ec1n th\u00f4ng kh\u00f4ng r\u00f5 r\u00e0ng.<\/p>\n<p>- DNS Flood Attack: T\u1ea5n c\u00f4ng n\u00e0y l\u00e0 khi m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e1c y\u00eau c\u1ea7u DNS \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn m\u1ed9t m\u00e1y ch\u1ee7 DNS ho\u1eb7c m\u1ed9t m\u1ea1ng, d\u1eabn \u0111\u1ebfn qu\u00e1 t\u1ea3i v\u00e0 l\u00e0m gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 DNS.<\/p>\n<p>- Domain Hijacking: K\u1ebb t\u1ea5n c\u00f4ng l\u1ea5y ki\u1ec3m so\u00e1t c\u1ee7a m\u1ed9t t\u00ean mi\u1ec1n b\u1eb1ng c\u00e1ch t\u1ea5n c\u00f4ng v\u00e0o t\u00e0i kho\u1ea3n qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n c\u1ee7a ch\u1ee7 s\u1edf h\u1eefu, thay \u0111\u1ed5i th\u00f4ng tin DNS \u0111\u1ec3 chuy\u1ec3n h\u01b0\u1edbng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00e1c.<\/p>\n<p><img class=\"wp-image-23755\" src=\"https:\/\/www.hostify.vn\/blog\/wp-content\/uploads\/2024\/05\/bao-mat-dns-3.png\" alt=\"b\u1ea3o m\u1eadt DNS 3\" \/><\/p>\n<h3>B\u1ea3o m\u1eadt DNS b\u1eb1ng DoH v\u00e0 DoT<\/h3>\n<p>DNS over HTTPS (DoH) v\u00e0 DNS over TLS (DoT) l\u00e0 hai c\u00f4ng ngh\u1ec7 m\u00e0 gi\u1edbi b\u1ea3o m\u1eadt v\u00e0 qu\u1ea3n tr\u1ecb m\u1ea1ng th\u01b0\u1eddng s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n b\u1ea3o m\u1eadt DNS. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 th\u00f4ng tin chi ti\u1ebft v\u1ec1 c\u1ea3 hai:<\/p>\n<h4>DNS over HTTPS (DoH)<\/h4>\n<p>- Ho\u1ea1t \u0111\u1ed9ng: DoH m\u00e3 h\u00f3a c\u00e1c y\u00eau c\u1ea7u DNS b\u00ean trong giao th\u1ee9c HTTPS v\u00e0 g\u1eedi ch\u00fang qua c\u1ed5ng 443, c\u00f9ng v\u1edbi c\u00e1c y\u00eau c\u1ea7u web b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p>- B\u1ea3o m\u1eadt: DoH gi\u00fap ng\u0103n ch\u1eb7n vi\u1ec7c gi\u00e1m s\u00e1t v\u00e0 thay \u0111\u1ed5i d\u1eef li\u1ec7u DNS b\u1edfi c\u00e1c b\u00ean th\u1ee9 ba, bao g\u1ed3m c\u1ea3 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP).<\/p>\n<p>- Quy\u1ec1n ri\u00eang t\u01b0: DoH gi\u00fap b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng b\u1eb1ng c\u00e1ch che gi\u1ea5u th\u00f4ng tin DNS kh\u1ecfi c\u00e1c b\u00ean quan s\u00e1t b\u00ean ngo\u00e0i.<\/p>\n<p>- Tri\u1ec3n khai: DoH hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c tri\u1ec3n khai r\u1ed9ng r\u00e3i trong c\u00e1c tr\u00ecnh duy\u1ec7t web ph\u1ed5 bi\u1ebfn nh\u01b0 Firefox, Chrome v\u00e0 Edge, c\u0169ng nh\u01b0 trong m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng di \u0111\u1ed9ng.<\/p>\n<h4>DNS over TLS (DoT)<\/h4>\n<p>- Ho\u1ea1t \u0111\u1ed9ng: DoT c\u0169ng m\u00e3 h\u00f3a c\u00e1c y\u00eau c\u1ea7u DNS, nh\u01b0ng thay v\u00ec s\u1eed d\u1ee5ng HTTPS, n\u00f3 s\u1eed d\u1ee5ng TLS \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u.<\/p>\n<p>- B\u1ea3o m\u1eadt: DoT cung c\u1ea5p m\u1ed9t k\u00eanh k\u1ebft n\u1ed1i b\u1ea3o m\u1eadt gi\u1eefa thi\u1ebft b\u1ecb ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 DNS, ng\u0103n ch\u1eb7n vi\u1ec7c \u0111\u00e1nh c\u1eafp th\u00f4ng tin ho\u1eb7c t\u1ea5n c\u00f4ng gi\u1eefa ch\u1eebng.<\/p>\n<p>- Hi\u1ec7u su\u1ea5t: M\u1eb7c d\u00f9 DoT cung c\u1ea5p m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt cao h\u01a1n so v\u1edbi DNS truy\u1ec1n th\u1ed1ng, nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 g\u00e2y ra m\u1ed9t ch\u00fat \u0111\u1ed9 tr\u1ec5 so v\u1edbi DoH do c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3.<\/p>\n<p>- Tri\u1ec3n khai: DoT y\u00eau c\u1ea7u c\u00e1c m\u00e1y ch\u1ee7 DNS h\u1ed7 tr\u1ee3 TLS v\u00e0 c\u00e1c client c\u0169ng c\u1ea7n h\u1ed7 tr\u1ee3 \u0111\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i b\u1ea3o m\u1eadt. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c tri\u1ec3n khai th\u00f4ng qua c\u1ea5u h\u00ecnh tr\u00ean c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng ho\u1eb7c tr\u00ecnh duy\u1ec7t web.<\/p>\n<p>C\u1ea3 hai c\u00f4ng ngh\u1ec7 n\u00e0y cung c\u1ea5p m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ea3o m\u1eadt h\u01a1n \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c truy v\u1ea5n DNS, gi\u00fap ng\u01b0\u1eddi d\u00f9ng v\u00e0 t\u1ed5 ch\u1ee9c ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng v\u00e0 b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 tr\u1ef1c tuy\u1ebfn.<\/p>\n<h3>B\u1ea3o m\u1eadt DNS b\u1eb1ng DNSCrypt<\/h3>\n<p>DNSCrypt l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 m\u00e3 h\u00f3a d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy v\u1ea5n DNS gi\u1eefa m\u00e1y t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 DNS. N\u00f3i c\u00e1ch kh\u00e1c, DNSCrypt m\u00e3 h\u00f3a m\u1ecdi d\u1eef li\u1ec7u li\u00ean quan DNS. N\u00f3 cho ph\u00e9p l\u1ecdc l\u01b0u l\u01b0\u1ee3ng \u0111i qua UDP v\u00e0 TCP v\u00e0 ng\u0103n ch\u1eb7n DNS spoofing th\u00f4ng qua c\u00e1c h\u00ecnh th\u1ee9c x\u00e1c th\u1ef1c nghi\u00eam ng\u1eb7t.<\/p>\n<h4>\u01afu \u0111i\u1ec3m c\u1ee7a DNSCrypt<\/h4>\n<p>- DNSCrypt m\u00e3 h\u00f3a d\u1eef li\u1ec7u DNS tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n, ng\u0103n ch\u1eb7n c\u00e1c k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 \u0111\u00e1nh c\u1eafp ho\u1eb7c can thi\u1ec7p v\u00e0o th\u00f4ng tin DNS.<\/p>\n<p>- D\u1eef li\u1ec7u DNS \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a khi \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i, gi\u00fap ng\u01b0\u1eddi d\u00f9ng b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 ng\u0103n ch\u1eb7n vi\u1ec7c theo d\u00f5i ho\u1ea1t \u0111\u1ed9ng tr\u1ef1c tuy\u1ebfn c\u1ee7a h\u1ecd.<\/p>\n<p>- DNSCrypt ng\u0103n ch\u1eb7n c\u00e1c t\u1ea5n c\u00f4ng nh\u01b0 DNS spoofing ho\u1eb7c DNS tampering b\u1eb1ng c\u00e1ch b\u1ea3o v\u1ec7 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u DNS.<\/p>\n<p>- DNSCrypt c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai tr\u00ean nhi\u1ec1u h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 n\u1ec1n t\u1ea3ng, bao g\u1ed3m c\u1ea3 m\u00e1y t\u00ednh c\u00e1 nh\u00e2n, thi\u1ebft b\u1ecb di \u0111\u1ed9ng v\u00e0 thi\u1ebft b\u1ecb m\u1ea1ng.<\/p>\n<p>- DNSCrypt c\u00f3 s\u1eb5n tr\u00ean nhi\u1ec1u n\u1ec1n t\u1ea3ng, bao g\u1ed3m Windows, macOS, Linux, iOS v\u00e0 Android.<\/p>\n<h4>Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a DNSCrypt<\/h4>\n<p>- \u0110\u1ec3 s\u1eed d\u1ee5ng DNSCrypt, m\u00e1y ch\u1ee7 DNS ph\u1ea3i h\u1ed7 tr\u1ee3 c\u00f4ng ngh\u1ec7 n\u00e0y. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 c\u1ea7n t\u00ecm ki\u1ebfm m\u00e1y ch\u1ee7 DNS h\u1ed7 tr\u1ee3 DNSCrypt ho\u1eb7c t\u1ef1 tri\u1ec3n khai m\u1ed9t m\u00e1y ch\u1ee7 DNS.<\/p>\n<p>- M\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u DNS c\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u0111\u1ed9 tr\u1ec5 trong qu\u00e1 tr\u00ecnh truy v\u1ea5n DNS, \u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u00ean c\u00e1c k\u1ebft n\u1ed1i internet ch\u1eadm.<\/p>\n<p>- C\u00f3 th\u1ec3 c\u00f3 s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch gi\u1eefa DNSCrypt v\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ho\u1eb7c d\u1ecbch v\u1ee5 tr\u00ean m\u1ea1ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi s\u1eed d\u1ee5ng c\u00f9ng v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 proxy ho\u1eb7c VPN.<\/p>\n<p>- \u0110\u1ec3 s\u1eed d\u1ee5ng DNSCrypt, ng\u01b0\u1eddi d\u00f9ng c\u1ea7n tin t\u01b0\u1edfng v\u00e0o c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u1ee7a c\u00e1c m\u00e1y ch\u1ee7 DNSCrypt, v\u00e0 s\u1ef1 tin c\u1eady n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 DNSCrypt.<\/p>\n<p>T\u1ed5ng quan, DNSCrypt l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 m\u1ea1nh m\u1ebd gi\u00fap b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt c\u1ee7a ng\u01b0\u1eddi d\u00f9ng trong vi\u1ec7c truy v\u1ea5n DNS, nh\u01b0ng c\u0169ng c\u00f3 nh\u01b0\u1ee3c \u0111i\u1ec3m v\u00e0 y\u00eau c\u1ea7u m\u1ed9t s\u1ed1 c\u00e2n nh\u1eafc khi tri\u1ec3n khai.<\/p>\n<p><img class=\"wp-image-23756\" src=\"https:\/\/www.hostify.vn\/blog\/wp-content\/uploads\/2024\/05\/bao-mat-dns-4.png\" alt=\"b\u1ea3o m\u1eadt DNS 4\" \/><\/p>\n<h3>B\u1ea3o m\u1eadt DNS b\u1eb1ng DNSSEC<\/h3>\n<p>DNSSEC (Domain Name System Security Extensions) l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 b\u1ea3o m\u1eadt \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 cung c\u1ea5p x\u00e1c th\u1ef1c v\u00e0 t\u00ednh to\u00e0n v\u1eb9n cho th\u00f4ng tin DNS.<\/p>\n<h4>\u01afu \u0111i\u1ec3m c\u1ee7a DNSSEC<\/h4>\n<p>- DNSSEC s\u1eed d\u1ee5ng ch\u1eef k\u00fd s\u1ed1 \u0111\u1ec3 x\u00e1c th\u1ef1c t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u DNS. \u0110i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 DNS spoofing, m\u00e0 l\u00e0m thay \u0111\u1ed5i d\u1eef li\u1ec7u DNS \u0111\u1ec3 chuy\u1ec3n h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn c\u00e1c trang web \u0111\u1ed9c h\u1ea1i ho\u1eb7c l\u1eeba \u0111\u1ea3o.<\/p>\n<p>- B\u1eb1ng c\u00e1ch x\u00e1c th\u1ef1c d\u1eef li\u1ec7u DNS, DNSSEC gi\u00fap ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o v\u00e0 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi d\u00f9ng kh\u1ecfi vi\u1ec7c truy c\u1eadp v\u00e0o c\u00e1c trang web gi\u1ea3 m\u1ea1o.<\/p>\n<p>- DNSSEC kh\u00f4ng ch\u1ec9 b\u1ea3o v\u1ec7 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u DNS m\u00e0 c\u00f2n cung c\u1ea5p m\u1ed9t c\u01a1 ch\u1ebf \u0111\u1ec3 \u1ea9n th\u00f4ng tin DNS c\u1ee7a ng\u01b0\u1eddi d\u00f9ng kh\u1ecfi c\u00e1c b\u00ean th\u1ee9 ba.<\/p>\n<p>- DNSSEC \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t ti\u00eau chu\u1ea9n trong vi\u1ec7c b\u1ea3o v\u1ec7 th\u00f4ng tin DNS, v\u00e0 n\u00f3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 r\u1ed9ng r\u00e3i tr\u00ean nhi\u1ec1u m\u00e1y ch\u1ee7 DNS v\u00e0 tr\u00ecnh duy\u1ec7t web.<\/p>\n<p>- DNSSEC c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai kh\u00f4ng ch\u1ec9 cho c\u00e1c t\u00ean mi\u1ec1n c\u1ea5p cao nh\u01b0 .com, .org m\u00e0 c\u00f2n cho c\u00e1c t\u00ean mi\u1ec1n c\u1ea5p cao h\u01a1n nh\u01b0 .gov, .edu, t\u0103ng c\u01b0\u1eddng t\u00ednh b\u1ea3o m\u1eadt cho c\u00e1c t\u1ed5 ch\u1ee9c v\u00e0 c\u01a1 quan ch\u00ednh ph\u1ee7.<\/p>\n<h4>Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a DNSSEC<\/h4>\n<p>- DNSSEC c\u00f3 th\u1ec3 y\u00eau c\u1ea7u m\u1ed9t s\u1ed1 ki\u1ebfn th\u1ee9c chuy\u00ean s\u00e2u v\u1ec1 h\u1ec7 th\u1ed1ng DNS v\u00e0 m\u1eadt m\u00e3 h\u1ecdc \u0111\u1ec3 tri\u1ec3n khai v\u00e0 qu\u1ea3n l\u00fd hi\u1ec7u qu\u1ea3.<\/p>\n<p>- Ch\u1eef k\u00fd s\u1ed1 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o c\u00e1c b\u1ea3n ghi DNS c\u00f3 th\u1ec3 l\u00e0m t\u0103ng k\u00edch th\u01b0\u1edbc c\u1ee7a g\u00f3i tin DNS, l\u00e0m t\u0103ng \u0111\u1ed9 tr\u1ec5 trong qu\u00e1 tr\u00ecnh truy v\u1ea5n DNS.<\/p>\n<p>- \u0110\u1ec3 DNSSEC ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3, c\u1ea7n s\u1ef1 h\u1ed7 tr\u1ee3 t\u1eeb t\u1ea5t c\u1ea3 c\u00e1c b\u00ean li\u00ean quan, bao g\u1ed3m c\u1ea3 c\u00e1c nh\u00e0 cung c\u1ea5p t\u00ean mi\u1ec1n, nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 DNS v\u00e0 ng\u01b0\u1eddi s\u1eed d\u1ee5ng.<\/p>\n<p>- Tri\u1ec3n khai v\u00e0 duy tr\u00ec DNSSEC c\u00f3 th\u1ec3 \u0111\u00f2i h\u1ecfi chi ph\u00ed v\u00e0 c\u00f4ng s\u1ee9c kh\u00f4ng nh\u1ecf t\u1eeb c\u00e1c t\u1ed5 ch\u1ee9c v\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 DNS.<\/p>\n<p>T\u00f3m l\u1ea1i, DNSSEC l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 m\u1ea1nh m\u1ebd gi\u00fap c\u1ea3i thi\u1ec7n b\u1ea3o m\u1eadt c\u1ee7a h\u1ec7 th\u1ed1ng DNS, nh\u01b0ng c\u0169ng c\u00f3 nh\u01b0\u1ee3c \u0111i\u1ec3m v\u00e0 y\u00eau c\u1ea7u m\u1ed9t s\u1ef1 \u0111\u1ea7u t\u01b0 \u0111\u00e1ng k\u1ec3 \u0111\u1ec3 tri\u1ec3n khai v\u00e0 duy tr\u00ec.<\/p>\n<div class=\"tg_wrap_cbsv tg_wrap_cbsv_blue\" style=\"margin: 20px 0px; border-radius: 4px; border: 2px solid #0066b2;\"><cite style=\"margin: 0px; background-color: #0066b2; color: #fff; border-top-left-radius: 2px; border-top-right-radius: 2px; font-size: 19px; padding: 12px 20px; font-weight: bold; display: block; font-style: normal;\">B\u1ea1n \u0111ang mu\u1ed1n x\u00e2y d\u1ef1ng m\u1ed9t trang web c\u1ee7a ri\u00eang m\u00ecnh<\/cite><\/p>\n<div class=\"textwidget\" style=\"padding: 20px; background: #70c2e280;\">\u0110\u0103ng k\u00fd ngay t\u00ean mi\u1ec1n th\u01b0\u01a1ng hi\u1ec7u t\u1ea1i Tenten.vn ch\u1ec9 v\u1edbi 2 c\u00fa click chu\u1ed9t: <strong>Ki\u1ec3m tra s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a t\u00ean mi\u1ec1n: Nh\u1eadp t\u00ean mi\u1ec1n v\u00e0 nh\u1ea5n \"ki\u1ec3m tra\".<\/strong> <span style=\"color: #ffff00;\"><a class=\"btn_combi_sv\" style=\"font-weight: bold; color: #ffff00; padding: 8px 26px 8px 26px; font-size: 20px; line-height: 30px; border-radius: 56px; text-shadow: none; background: #0066b2; display: table; margin: 0px auto;\" href=\"https:\/\/tenten.vn\/vi\/bang-gia-ten-mien?code=knjcpEfWoTSzUNMw&amp;idCampaign=3080\">B\u1ea2NG GI\u00c1 T\u00caN MI\u1ec0N M\u1edaI NH\u1ea4T<\/a><\/span><\/p>\n<ul>\n<li><a href=\"https:\/\/bit.ly\/3QYbaqa\">V\u00e0o nh\u00f3m Zalo nh\u1eadn \u01b0u \u0111\u00e3i t\u00ean mi\u1ec1n t\u1ea1i \u0111\u00e2y<\/a><\/li>\n<li>Hotline: (024) 71 089 999<\/li>\n<li>Email: info@tenten.vn<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<h4><strong>B\u00e0i li\u00ean quan<\/strong><\/h4>\n<ul>\n<li class=\"title-article\"><a href=\"https:\/\/cloud.z.com\/vn\/news\/dns\/\">DNS l\u00e0 g\u00ec? T\u1eeb A-Z v\u1ec1 DNS Google, DNS Server, DNS VNPT<\/a><\/li>\n<li class=\"title-article\"><a href=\"https:\/\/cloud.z.com\/vn\/news\/dns-1-1-1-1\/\">T\u1eeb A-Z v\u1ec1 DNS 1.1.1.1, h\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t DNS 1.1.1.1 tr\u00ean m\u00e1y t\u00ednh v\u00e0 \u0111i\u1ec7n tho\u1ea1i<\/a><\/li>\n<li class=\"title-article\"><a href=\"https:\/\/cloud.z.com\/vn\/news\/ddns\/\">DDNS l\u00e0 g\u00ec? C\u00e1c l\u1ee3i \u00edch m\u00e0 DDNS mang l\u1ea1i b\u1ea1n kh\u00f4ng n\u00ean b\u1ecf l\u1ee1<\/a><\/li>\n<li class=\"title-article\"><a href=\"https:\/\/cloud.z.com\/vn\/news\/flush-dns\/\">Flush DNS l\u00e0 g\u00ec? C\u00e1ch x\u00f3a cache DNS trong Windows chi ti\u1ebft nh\u1ea5t<\/a><\/li>\n<li class=\"title-article\"><a href=\"https:\/\/cloud.z.com\/vn\/news\/dns-security\/\">DNS Security l\u00e0 g\u00ec? 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L\u1ee3i \u00edch khi s\u1eed d\u1ee5ng t\u00ean mi\u1ec1n id.vn<\/a><\/li>\n<li><a href=\"https:\/\/cloud.z.com\/vn\/news\/ten-mien-io-vn\/\">T\u00ean mi\u1ec1n io.vn l\u00e0 g\u00ec? Mang l\u1ea1i l\u1ee3i \u00edch g\u00ec khi s\u1eed d\u1ee5ng?<\/a><\/li>\n<li><a href=\"https:\/\/cloud.z.com\/vn\/news\/ten-mien-net\/\">T\u00ean mi\u1ec1n .net l\u00e0 g\u00ec? L\u1ee3i \u00edch khi s\u1eed d\u1ee5ng t\u00ean mi\u1ec1n .net gi\u00e1 r\u1ebb<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea3o m\u1eadt DNS l\u00e0 m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 \u0111\u01b0\u1ee3c quan t\u00e2m h\u00e0ng \u0111\u1ea7u trong l\u0129nh v\u1ef1c an ninh m\u1ea1ng. B\u1edfi DNS v\u1ec1 c\u01a1 b\u1ea3n ch\u00ednh l\u00e0 danh b\u1ea1 \u0111\u1ecba ch\u1ec9 c\u1ee7a internet. Tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng DNS...<\/p>\n","protected":false},"author":28,"featured_media":10732,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[177,83],"tags":[],"jetpack_featured_media_url":"https:\/\/cloud.z.com\/vn\/wp-content\/uploads\/2024\/05\/bao-mat-dns-1.png","_links":{"self":[{"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/posts\/10731"}],"collection":[{"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/comments?post=10731"}],"version-history":[{"count":2,"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/posts\/10731\/revisions"}],"predecessor-version":[{"id":10734,"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/posts\/10731\/revisions\/10734"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/media\/10732"}],"wp:attachment":[{"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/media?parent=10731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/categories?post=10731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cloud.z.com\/vn\/en\/wp-json\/wp\/v2\/tags?post=10731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}