{"id":12382670,"date":"2026-03-27T12:21:33","date_gmt":"2026-03-27T04:21:33","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/%e5%85%a8%e9%9d%a2%e8%a7%a3%e6%9e%90%e5%9f%9f%e5%90%8d%e6%b3%a8%e5%86%8c%e3%80%81%e8%a7%a3%e6%9e%90%e4%b8%8e%e7%ae%a1%e7%90%86%ef%bc%9adns%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86%e4%b8%8e%e6%9c%80\/"},"modified":"2026-03-27T12:38:33","modified_gmt":"2026-03-27T04:38:33","slug":"domain-registration-dns-resolution-management-guide","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/domain\/domain-registration-dns-resolution-management-guide\/","title":{"rendered":"Ph\u00e2n t\u00edch to\u00e0n di\u1ec7n v\u1ec1 \u0111\u0103ng k\u00fd, ph\u00e2n gi\u1ea3i v\u00e0 qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n: H\u01b0\u1edbng d\u1eabn nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng DNS v\u00e0 th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t"},"content":{"rendered":"

Nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u00e0 kh\u00e1i ni\u1ec7m tr\u1ecdng t\u00e2m c\u1ee7a H\u1ec7 th\u1ed1ng T\u00ean mi\u1ec1n (Domain Name System \u2013 DNS)<\/h2>\n\n\n\n

H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n (Domain Name System \u2013 DNS) l\u00e0 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n c\u1ee7a Internet, \u0111\u00f3ng vai tr\u00f2 nh\u01b0 \u201cs\u1ed5 \u0111i\u1ec7n tho\u1ea1i\u201d trong th\u1ebf gi\u1edbi Internet, gi\u00fap chuy\u1ec3n \u0111\u1ed5i c\u00e1c \u0111\u1ecba ch\u1ec9 web c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c b\u1edfi con ng\u01b0\u1eddi (nh\u01b0 example.com) th\u00e0nh c\u00e1c \u0111\u1ecba ch\u1ec9 IP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00e1y t\u00ednh hi\u1ec3u v\u00e0 x\u1eed l\u00fd. example.com<\/code>Chuy\u1ec3n \u0111\u1ed5i m\u1ed9t t\u00ean mi\u1ec1n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00e1y t\u00ednh nh\u1eadn di\u1ec7n l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean trong vi\u1ec7c n\u1eafm v\u1eefng t\u1ea5t c\u1ea3 c\u00e1c k\u1ef9 thu\u1eadt li\u00ean quan \u0111\u1ebfn t\u00ean mi\u1ec1n. M\u1ed9t t\u00ean mi\u1ec1n ho\u00e0n ch\u1ec9nh \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb nhi\u1ec1u c\u1ea5p \u0111\u1ed9, v\u1edbi m\u1ee9c \u0111\u1ed9 quan tr\u1ecdng gi\u1ea3m d\u1ea7n t\u1eeb ph\u1ea3i sang tr\u00e1i. C\u1ea5p \u0111\u1ed9 b\u00ean ph\u1ea3i c\u00f9ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t (top-level domain \u2013 TLD), ch\u1eb3ng h\u1ea1n nh\u01b0\u2026 .com<\/code>\u3001.org<\/code>\u3001.cn<\/code> V\u00ed d\u1ee5: example.com. Trong \u0111\u00f3, ph\u1ea7n b\u00ean tr\u00e1i c\u1ee7a TLD (Top-Level Domain) l\u00e0 t\u00ean mi\u1ec1n c\u1ea5p hai (secondary domain name), v\u00e0 \u0111\u00e2y th\u01b0\u1eddng l\u00e0 ph\u1ea7n ch\u00ednh m\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 \u0111\u0103ng k\u00fd v\u00e0 t\u00f9y ch\u1ec9nh. example.com<\/code> trong,example<\/code> \u0110\u00f3 ch\u00ednh l\u00e0 t\u00ean mi\u1ec1n c\u1ea5p hai. N\u1ebfu ti\u1ebfp t\u1ee5c di chuy\u1ec3n v\u1ec1 ph\u00eda tr\u00e1i, c\u00f3 th\u1ec3 g\u1eb7p c\u00e1c t\u00ean mi\u1ec1n c\u1ea5p ba, c\u1ea5p b\u1ed1n; ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u00ean mi\u1ec1n con (subdomains), v\u00ed d\u1ee5 nh\u01b0\u2026 www.example.com<\/code> trong www<\/code>\u3002<\/p>\n\n\n\n

B\u1ea5t k\u1ef3 thao t\u00e1c n\u00e0o li\u00ean quan \u0111\u1ebfn t\u00ean mi\u1ec1n \u0111\u1ec1u v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 vi\u1ec7c t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c c\u01a1 quan qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n (Domain Name Registries \u2013 DNS) v\u00e0 c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n (Domain Name Registrars). C\u00e1c c\u01a1 quan qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n l\u00e0 nh\u1eefng t\u1ed5 ch\u1ee9c ch\u1ecbu tr\u00e1ch nhi\u1ec7m qu\u1ea3n l\u00fd v\u00e0 b\u1ea3o tr\u00ec c\u01a1 s\u1edf d\u1eef li\u1ec7u ch\u1ee9a th\u00f4ng tin v\u1ec1 c\u00e1c t\u00ean mi .com<\/code> \u0110\u00f3 l\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u ch\u1ee9a th\u00f4ng tin v\u1ec1 c\u00e1c t\u00ean mi\u1ec1n tr\u00ean m\u1ea1ng. C\u00e1c nh\u00e0 \u0111\u0103ng k\u00fd (registrar) l\u00e0 nh\u1eefng c\u00f4ng ty \u0111\u00e3 \u0111\u01b0\u1ee3c c\u01a1 quan qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n (domain registration authority) ch\u1ee9ng nh\u1eadn, cung c\u1ea5p tr\u1ef1c ti\u1ebfp c\u00e1c d\u1ecbch v\u1ee5 nh\u01b0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, gia h\u1ea1n, qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n cho ng\u01b0\u1eddi d\u00f9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 GoDaddy, Alibaba Cloud, v.v. Khi ng\u01b0\u1eddi d\u00f9ng mua m\u1ed9t t\u00ean mi\u1ec1n t\u1eeb nh\u00e0 \u0111\u0103ng k\u00fd, h\u1ecd th\u1ef1c ch\u1ea5t l\u00e0 \u0111ang thu\u00ea quy\u1ec1n s\u1eed d\u1ee5ng t\u00ean mi\u1ec1n \u0111\u00f3 trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh (th\u01b0\u1eddng l\u00e0 m\u1ed9t n\u0103m) t\u1eeb c\u01a1 s\u1edf d\u1eef li\u1ec7u do c\u01a1 quan qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n qu\u1ea3n l\u00fd.<\/p>\n\n\n\n

Chi ti\u1ebft quy tr\u00ecnh \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n<\/h2>\n\n\n\n

\u0110\u0103ng k\u00fd t\u00ean mi\u1ec1n l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t \u0111\u1ecba ch\u1ec9 tr\u00ean m\u1ea1ng. Quy tr\u00ecnh n\u00e0y b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c t\u00ecm ki\u1ebfm xem li\u1ec7u t\u00ean mi\u1ec1n \u0111\u00f3 c\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c ai s\u1eed d\u1ee5ng hay ch\u01b0a. Nh\u1edd c\u00f4ng c\u1ee5 \u201cWhois Query\u201d c\u00f3 s\u1eb5n tr\u00ean trang web c\u1ee7a nh\u00e0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 ki\u1ec3m tra xem t\u00ean mi\u1ec1n m\u00ecnh mu\u1ed1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c hay kh\u00f4ng. N\u1ebfu t\u00ean mi\u1ec1n \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd, k\u1ebft qu\u1ea3 truy v\u1ea5n s\u1ebd hi\u1ec3n th\u1ecb th\u00f4ng tin c\u01a1 b\u1ea3n v\u1ec1 ch\u1ee7 s\u1edf h\u1eefu c\u0169ng nh\u01b0 ng\u00e0y h\u1ebft h\u1ea1n c\u1ee7a n\u00f3. Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 c\u1ed1 g\u1eafng li\u00ean h\u1ec7 v\u1edbi ch\u1ee7 s\u1edf h\u1eefu \u0111\u1ec3 mua t\u00ean mi\u1ec1n \u0111\u00f3, ho\u1eb7c c\u1ea7n suy ngh\u0129 \u0111\u1ebfn m\u1ed9t t\u00ean mi\u1ec1n kh\u00e1c.<\/p>\n\n\n\n

Sau khi x\u00e1c nh\u1eadn r\u1eb1ng t\u00ean mi\u1ec1n c\u00f3 s\u1eb5n v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, ng\u01b0\u1eddi d\u00f9ng s\u1ebd b\u01b0\u1edbc v\u00e0o qu\u00e1 tr\u00ecnh mua. Ng\u01b0\u1eddi d\u00f9ng c\u1ea7n ch\u1ecdn th\u1eddi h\u1ea1n \u0111\u0103ng k\u00fd, th\u01b0\u1eddng l\u00e0 t\u1eeb 1 \u0111\u1ebfn 10 n\u0103m, v\u00e0 \u0111i\u1ec1n th\u00f4ng tin \u0111\u0103ng k\u00fd th\u1ef1c t\u1ebf c\u1ee7a ng\u01b0\u1eddi s\u1edf h\u1eefu t\u00ean mi\u1ec1n. Theo ch\u00ednh s\u00e1ch c\u1ee7a c\u00e1c t\u1ed5 ch\u1ee9c qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n tr\u00ean Internet, nh\u1eefng th\u00f4ng tin n\u00e0y (bao g\u1ed3m t\u00ean, email, s\u1ed1 \u0111i\u1ec7n tho\u1ea1i, \u0111\u1ecba ch\u1ec9) s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong c\u01a1 s\u1edf d\u1eef li\u1ec7u WHOIS c\u00f4ng khai. Tuy nhi\u00ean, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 ch\u1ecdn mua d\u1ecbch v\u1ee5 \u201cB\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 WHOIS\u201d; nh\u00e0 \u0111\u0103ng k\u00fd s\u1ebd cung c\u1ea5p th\u00f4ng tin thay th\u1ebf nh\u1eb1m b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 c\u00e1 nh\u00e2n. Trong qu\u00e1 tr\u00ecnh mua, ng\u01b0\u1eddi d\u00f9ng c\u0169ng c\u1ea7n thi\u1ebft l\u1eadp c\u00e1c quy\u1ec1n qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n quan tr\u1ecdng, bao g\u1ed3m m\u1eadt kh\u1ea9u \u0111\u0103ng nh\u1eadp v\u00e0o h\u1ec7 th\u1ed1ng qu\u1ea3n tr\u1ecb c\u1ee7a nh\u00e0 \u0111\u0103ng k\u00fd v\u00e0 \u201cM\u00e3 \u1ee7y quy\u1ec1n\u201d d\u00f9ng \u0111\u1ec3 chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n.<\/p>\n\n\n\n

Sau khi thanh to\u00e1n th\u00e0nh c\u00f4ng, t\u00ean mi\u1ec1n kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e2n gi\u1ea3i tr\u00ean to\u00e0n c\u1ea7u ngay l\u1eadp t\u1ee9c. C\u00e1c t\u00ean mi\u1ec1n m\u1edbi \u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd ho\u1eb7c c\u00f3 th\u00f4ng tin thay \u0111\u1ed5i c\u1ea7n tr\u1ea3i qua m\u1ed9t qu\u00e1 tr\u00ecnh \u0111\u1ed3ng b\u1ed9 h\u00f3a tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201ctruy\u1ec1n th\u00f4ng tin DNS\u201d (DNS propagation). Do th\u1eddi gian l\u00e0m m\u1edbi b\u1ed9 \u0111\u1ec7m c\u1ee7a c\u00e1c m\u00e1y ch\u1ee7 DNS tr\u00ean kh\u1eafp th\u1ebf gi\u1edbi kh\u00e1c nhau, qu\u00e1 tr\u00ecnh n\u00e0y c\u00f3 th\u1ec3 m\u1ea5t t\u1eeb v\u00e0i ph\u00fat \u0111\u1ebfn 48 gi\u1edd. Trong th\u1eddi gian n\u00e0y, ng\u01b0\u1eddi d\u00f9ng \u1edf m\u1ed9t s\u1ed1 khu v\u1ef1c c\u00f3 th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c t\u00ean mi\u1ec1n, trong khi nh\u1eefng ng\u01b0\u1eddi d\u00f9ng \u1edf c\u00e1c khu v\u1ef1c kh\u00e1c th\u00ec kh\u00f4ng; \u0111\u00e2y l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n

\n\n
\n \u0110\u0103ng k\u00fd t\u00ean mi\u1ec1n hosting.com<\/strong>\n
Th\u00f4ng qua g\u00f3i l\u01b0u tr\u1eef chia s\u1ebb h\u00e0ng n\u0103m, nh\u1eadn t\u00ean mi\u1ec1n .com mi\u1ec5n ph\u00ed trong m\u1ed9t n\u0103m, h\u1ed7 tr\u1ee3 300+ h\u1eadu t\u1ed1 t\u00ean mi\u1ec1n, qu\u1ea3n l\u00fd DNS mi\u1ec5n ph\u00ed, h\u1ed7 tr\u1ee3 kh\u00e1ch h\u00e0ng 24\/7<\/div>\n <\/div>\n\n
\n \n \n \"\u0110\u0103ng\n \n \n <\/a>\n \n \n Truy c\u1eadp hosting.com <\/a>\n <\/div>\n <\/div>\n\n \n\n\n\n\n\n\n

Ph\u00e2n t\u00edch s\u00e2u v\u1ec1 c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a DNS (Domain Name System)<\/h2>\n\n\n\n

C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a H\u1ec7 th\u1ed1ng T\u00ean mi\u1ec1n (Domain Name System \u2013 DNS) l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh truy v\u1ea5n theo m\u00f4 h\u00ecnh ph\u00e2n t\u00e1n v\u00e0 c\u00f3 c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p. Nhi\u1ec7m v\u1ee5 ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 chuy\u1ec3n \u0111\u1ed5i t\u00ean mi\u1ec1n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP, qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cgi\u1ea3i m\u00e3\u201d (resolution).<\/p>\n\n\n\n

Khi ng\u01b0\u1eddi d\u00f9ng nh\u1eadp m\u1ed9t \u0111\u1ecba ch\u1ec9 web v\u00e0o tr\u00ecnh duy\u1ec7t v\u00e0 nh\u1ea5n Enter, h\u00e0nh tr\u00ecnh gi\u1ea3i m\u00e3 \u0111\u1ecba ch\u1ec9 \u0111\u00f3 b\u1eaft \u0111\u1ea7u. \u0110\u1ea7u ti\u00ean, h\u1ec7 \u0111i\u1ec1u h\u00e0nh s\u1ebd ki\u1ec3m tra b\u1ed9 nh\u1edb \u0111\u1ec7m \u201cDNS resolver\u201d tr\u00ean m\u00e1y t\u00ednh. N\u1ebfu \u0111\u1ecba ch\u1ec9 web \u0111\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c truy c\u1eadp g\u1ea7n \u0111\u00e2y v\u00e0 c\u00f3 th\u00f4ng tin \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 nh\u1edb \u0111\u1ec7m, h\u1ec7 \u0111i\u1ec1u h\u00e0nh s\u1ebd tr\u1ea3 v\u1ec1 \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng ngay l\u1eadp t\u1ee9c, v\u00e0 qu\u00e1 tr\u00ecnh k\u1ebft th\u00fac. N\u1ebfu kh\u00f4ng t\u00ecm th\u1ea5y th\u00f4ng tin trong b\u1ed9 nh\u1edb \u0111\u1ec7m, y\u00eau c\u1ea7u s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn \u201cserver DNS tu\u1ea7n t\u1ef1\u201d (recursive DNS server) \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong c\u1ea5u h\u00ecnh m\u1ea1ng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng (th\u01b0\u1eddng do nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet \u2013 ISP ho\u1eb7c c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 DNS c\u00f4ng c\u1ed9ng nh\u01b0\u2026) 8.8.8.8<\/code> (Cung c\u1ea5p.)<\/p>\n\n\n\n

C\u00e1c m\u00e1y ch\u1ee7 DNS tu\u1ea7n ho\u00e0n (recursive DNS servers) \u0111\u1ea3m nh\u1eadn c\u00f4ng vi\u1ec7c x\u1eed l\u00fd c\u00e1c y\u00eau c\u1ea7u truy v\u1ea5n DNS ph\u1ee9c t\u1ea1p. Ch\u00fang b\u1eaft \u0111\u1ea7u qu\u00e1 tr\u00ecnh truy v\u1ea5n t\u1eeb \u0111\u1ec9nh c\u1ee7a h\u1ec7 th\u1ed1ng DNS tr\u00ean internet \u2013 \u0111\u00f3 l\u00e0 c\u00e1c m\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n g\u1ed1c (root domain servers). C\u00e1c m\u00e1y ch\u1ee7 g\u1ed1c kh\u00f4ng cung c\u1ea5p tr\u1ef1c ti\u1ebfp k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng, nh\u01b0ng ch\u00fang s\u1ebd h\u01b0\u1edbng d\u1eabn c\u00e1c m\u00e1y ch\u1ee7 tu\u1ea7n ho\u00e0n \u0111\u1ebfn t\u00ecm ki\u1ebfm th\u00f4ng tin c\u1ea7n thi\u1ebft t\u1ea1i c\u00e1c m\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n t\u01b0\u01a1ng \u1ee9ng, d\u1ef1a tr\u00ean t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u. V\u00ed d\u1ee5, \u0111\u1ed1i v\u1edbi\u2026 .com<\/code> V\u1ec1 t\u00ean mi\u1ec1n (domain name), m\u00e1y ch\u1ee7 g\u1ed1c (root server) s\u1ebd th\u00f4ng b\u00e1o cho b\u00ean ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 vi\u1ec7c qu\u1ea3n l\u00fd n\u00f3. .com<\/code> \u0110\u1ecba ch\u1ec9 c\u1ee7a m\u00e1y ch\u1ee7 TLD (Top-Level Domain).<\/p>\n\n\n\n

Ti\u1ebfp theo, m\u00e1y ch\u1ee7 \u0111\u1ec7 quy g\u1eedi truy v\u1ea5n \u0111\u1ebfn m\u00e1y ch\u1ee7 TLD \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh. M\u00e1y ch\u1ee7 TLD c\u0169ng kh\u00f4ng l\u01b0u tr\u1eef IP c\u1ee7a t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3, nh\u01b0ng n\u00f3 bi\u1ebft \u0111\u1ecba ch\u1ec9 c\u1ee7a \u201cm\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n c\u00f3 th\u1ea9m quy\u1ec1n\u201d t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u00ean mi\u1ec1n \u0111\u00f3. Nh\u00f3m m\u00e1y ch\u1ee7 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd b\u1edfi nh\u00e0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n ho\u1eb7c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 DNS c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n

Cu\u1ed1i c\u00f9ng, m\u00e1y ch\u1ee7 \u0111\u1ec7 quy g\u1eedi y\u00eau c\u1ea7u truy v\u1ea5n cu\u1ed1i c\u00f9ng \u0111\u1ebfn m\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n quy\u1ec1n l\u1ef1c (authority domain name server). M\u00e1y ch\u1ee7 quy\u1ec1n l\u1ef1c l\u01b0u tr\u1eef th\u00f4ng tin DNS c\u1ee7a t\u00ean mi\u1ec1n \u0111\u00f3 v\u00e0 s\u1ebd tr\u1ea3 v\u1ec1 \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u00ean mi\u1ec1n (th\u01b0\u1eddng l\u00e0 b\u1ea3n ghi lo\u1ea1i A ho\u1eb7c CNAME) cho m\u00e1y ch\u1ee7 \u0111\u1ec7 quy. M\u00e1y ch\u1ee7 \u0111\u1ec7 quy sau \u0111\u00f3 tr\u1ea3 k\u1ebft qu\u1ea3 n\u00e0y cho m\u00e1y t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 l\u01b0u n\u00f3 v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee7a m\u00ecnh \u0111\u1ec3 s\u1eed d\u1ee5ng cho c\u00e1c truy v\u1ea5n sau n\u00e0y. M\u00e1y t\u00ednh c\u0169ng l\u01b0u tr\u1eef k\u1ebft qu\u1ea3 n\u00e0y v\u00e0 truy\u1ec1n \u0111\u1ecba ch\u1ec9 IP cho tr\u00ecnh duy\u1ec7t; tr\u00ecnh duy\u1ec7t s\u1ebd s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 IP n\u00e0y \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 m\u1ee5c ti\u00eau.<\/p>\n\n\n\n

B\u1ea3n ghi DNS l\u00e0 c\u00e1c h\u01b0\u1edbng d\u1eabn c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean m\u00e1y ch\u1ee7 c\u00f3 th\u1ea9m quy\u1ec1n, c\u00e1c lo\u1ea1i ph\u1ed5 bi\u1ebfn bao g\u1ed3m: b\u1ea3n ghi A (tr\u1ecf t\u00ean mi\u1ec1n \u0111\u1ebfn m\u1ed9t \u0111\u1ecba ch\u1ec9 IPv4), b\u1ea3n ghi AAAA (tr\u1ecf \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 IPv6), b\u1ea3n ghi CNAME (b\u00ed danh t\u00ean mi\u1ec1n, tr\u1ecf m\u1ed9t t\u00ean mi\u1ec1n \u0111\u1ebfn m\u1ed9t t\u00ean mi\u1ec1n kh\u00e1c), b\u1ea3n ghi MX (ch\u1ec9 \u0111\u1ecbnh m\u00e1y ch\u1ee7 ch\u1ecbu tr\u00e1ch nhi\u1ec7m nh\u1eadn th\u01b0), b\u1ea3n ghi TXT (l\u01b0u tr\u1eef th\u00f4ng tin v\u0103n b\u1ea3n, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c minh quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n ho\u1eb7c ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt email), v.v.<\/p>\n\n\n\n

C\u00e1c ph\u01b0\u01a1ng ph\u00e1p qu\u1ea3n l\u00fd v\u00e0 b\u1ea3o m\u1eadt t\u00ean mi\u1ec1n t\u1ed1t nh\u1ea5t<\/h2>\n\n\n\n

Qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o website v\u00e0 d\u1ecbch v\u1ee5 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, b\u1ea3o m\u1eadt trong th\u1eddi gian d\u00e0i. \u0110\u1ea7u ti\u00ean, quy\u1ec1n s\u1edf h\u1eefu v\u00e0 quy\u1ec1n qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n r\u1ea5t quan tr\u1ecdng. H\u00e3y s\u1eed d\u1ee5ng m\u1ed9t \u0111\u1ecba ch\u1ec9 email \u0111\u00e1ng tin c\u1eady, d\u00e0nh ri\u00eang \u0111\u1ec3 li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 t\u00ean mi\u1ec1n, v\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng \u0111\u1ecba ch\u1ec9 email \u0111\u00f3 \u0111\u01b0\u1ee3c b\u1ea3o m\u1eadt. Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ecba ch\u1ec9 email t\u1ea1m th\u1eddi c\u00f3 th\u1ec3 h\u1ebft h\u1ea1n b\u1ea5t c\u1ee9 l\u00fac n\u00e0o. \u0110\u1ed3ng th\u1eddi, h\u00e3y b\u1ea3o m\u1eadt t\u1ed1t m\u1eadt kh\u1ea9u v\u00e0 th\u00f4ng tin x\u00e1c th\u1ef1c b\u1ed5 sung c\u1ee7a t\u00e0i kho\u1ea3n nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 t\u00ean mi\u1ec1n; ch\u00fang ch\u00ednh l\u00e0 \u201cchi\u1ebfc ch\u00eca kh<\/p>\n\n\n\n

\u201cM\u00e3 autorization\u201d (m\u00e3 \u1ee7y quy\u1ec1n) l\u00e0 m\u1ed9t chu\u1ed7i k\u00fd t\u1ef1 m\u1eadt kh\u1ea9u c\u1ea7n thi\u1ebft khi chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n; n\u00f3 gi\u1ed1ng nh\u01b0 \u201cchi\u1ebfc ch\u00eca kh\u00f3a v\u1eadt l\u00fd\u201d d\u00f9ng \u0111\u1ec3 truy c\u1eadp v\u00e0o t\u00ean mi\u1ec1n \u0111\u00f3. N\u1ebfu kh\u00f4ng c\u00f3 m\u00e3 \u1ee7y quy\u1ec1n ch\u00ednh x\u00e1c, kh\u00f4ng ai c\u00f3 th\u1ec3 chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n sang nh\u00e0 \u0111\u0103ng k\u00fd kh\u00e1c. B\u1ea1n c\u1ea7n l\u01b0u tr\u1eef m\u00e3 n\u00e0y m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn v\u00e0 ch\u1ec9 cung c\u1ea5p n\u00f3 cho nh\u00e0 \u0111\u0103ng k\u00fd \u0111\u00edch khi th\u1ef1c s\u1ef1 c\u1ea7n th\u1ef1c hi\u1ec7n thao t\u00e1c chuy\u1ec3n nh\u01b0\u1ee3ng.<\/p>\n\n\n

\n\n
\n \u0110\u0103ng k\u00fd t\u00ean mi\u1ec1n UltaHost<\/strong>\n
H\u01a1n 300 \u0111u\u00f4i t\u00ean mi\u1ec1n, ch\u1ecdn g\u00f3i l\u01b0u tr\u1eef h\u00e0ng n\u0103m, t\u1eadn h\u01b0\u1edfng t\u00ean mi\u1ec1n mi\u1ec5n ph\u00ed! Chuy\u1ec3n t\u00ean mi\u1ec1n sang Ultahost \u0111\u1ec3 \u0111\u01b0\u1ee3c gia h\u1ea1n mi\u1ec5n ph\u00ed m\u1ed9t n\u0103m, .com $9.49 n\u0103m \u0111\u1ea7u ti\u00ean<\/div>\n <\/div>\n\n
\n \n \n \"\u0110\u0103ng\n \n \n <\/a>\n \n \n Truy c\u1eadp UltaHost <\/a>\n <\/div>\n <\/div>\n\n \n\n\n\n\n\n\n

Trong l\u0129nh v\u1ef1c qu\u1ea3n l\u00fd DNS, vi\u1ec7c s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac DNS ch\u1ee7-thu\u1ed9c (master-slave) c\u00f3 th\u1ec3 n\u00e2ng cao \u0111\u00e1ng k\u1ec3 m\u1ee9c \u0111\u1ed9 s\u1eb5n s\u00e0ng ho\u1ea1t \u0111\u1ed9ng (availability) c\u1ee7a h\u1ec7 th\u1ed1ng. C\u1ea7n thi\u1ebft ph\u1ea3i thi\u1ebft l\u1eadp \u00edt nh\u1ea5t hai nh\u00f3m m\u00e1y ch\u1ee7 DNS ch\u00ednh th\u1ee9c (authoritative DNS servers); khi m\u1ed9t nh\u00f3m g\u1eb7p s\u1ef1 c\u1ed1, nh\u00f3m c\u00f2n l\u1ea1i v\u1eabn c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c cung c\u1ea5p d\u1ecbch v\u1ee5. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u00e1m m\u00e2y v\u00e0 c\u00e1c c\u00f4ng ty chuy\u00ean nghi\u1ec7p v\u1ec1 DNS \u0111\u1ec1u cung c\u1ea5p c\u00e1c d\u1ecbch v\u1ee5 gi\u1ea3i quy\u1ebft \u0111\u1ecba ch\u1ec9 DNS v\u1edbi m\u1ee9c \u0111\u1ed9 s\u1eb5n s\u00e0ng<\/p>\n\n\n\n

Vi\u1ec7c gia h\u1ea1n \u0111\u1ecbnh k\u1ef3 v\u00e0 b\u1eadt ch\u1ee9c n\u0103ng t\u1ef1 \u0111\u1ed9ng gia h\u1ea1n l\u00e0 nh\u1eefng bi\u1ec7n ph\u00e1p c\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u0103n ch\u1eb7n t\u00ecnh tr\u1ea1ng t\u00ean mi\u1ec1n h\u1ebft h\u1ea1n m\u1ed9t c\u00e1ch kh\u00f4ng mong mu\u1ed1n. Sau khi t\u00ean mi\u1ec1n h\u1ebft h\u1ea1n, n\u00f3 s\u1ebd c\u00f3 m\u1ed9t \u201ckho\u1ea3ng th\u1eddi gian ho\u00e0n l\u1ea1i\u201d (recovery period); trong th\u1eddi gian n\u00e0y, gi\u00e1 ho\u00e0n l\u1ea1i t\u00ean mi\u1ec1n r\u1ea5t cao. Sau \u0111\u00f3, t\u00ean mi\u1ec1n s\u1ebd \u0111\u01b0\u1ee3c m\u1edf cho c\u00f4ng ch\u00fang \u0111\u0103ng k\u00fd l\u1ea1i, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn t\u1ed5n th\u1ea5t v\u1ec1 th\u01b0\u01a1ng hi\u1ec7u v\u00e0 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp. \u0110\u1ec3 b\u1ea3o v\u1ec7 kh\u1ecfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DNS ho\u1eb7c c\u00e1c h\u00e0nh vi x\u1ea5u, b\u1ea1n n\u00ean tri\u1ec3n khai c\u00e1c c\u00f4ng c\u1ee5 b\u1ea3o m\u1eadt DNS. DNSSEC s\u1eed d\u1ee5ng ch\u1eef k\u00fd s\u1ed1 \u0111\u1ec3 x\u00e1c th\u1ef1c t\u00ednh ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c ph\u1ea3n h\u1ed3i DNS, \u0111\u1ea3m b\u1ea3o r\u1eb1ng \u0111\u1ecba ch\u1ec9 trang web m\u00e0 ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp kh\u00f4ng b\u1ecb s\u1eeda \u0111\u1ed5i.<\/p>\n\n\n\n

Cu\u1ed1i c\u00f9ng, h\u00e3y thi\u1ebft l\u1eadp m\u1ed9t danh s\u00e1ch ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3: ki\u1ec3m tra th\u00f4ng tin \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, c\u00e0i \u0111\u1eb7t b\u1ea3n ghi DNS, tr\u1ea1ng th\u00e1i ch\u1ee9ng ch\u1ec9 SSL v\u00e0 th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a qu\u00e1 tr\u00ecnh gi\u1ea3i quy\u1ebft t\u00ean mi\u1ec1n m\u1ed7i qu\u00fd ho\u1eb7c m\u1ed7i n\u1eeda n\u0103m, \u0111\u1ec3 ng\u0103n ng\u1eeba c\u00e1c v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi ch\u00fang x\u1ea3y ra.<\/p>\n\n\n\n

T\u00f3m l\u1ea1i<\/h2>\n\n\n\n

T\u00ean mi\u1ec1n, v\u1edbi t\u01b0 c\u00e1ch l\u00e0 l\u1ed1i v\u00e0o ch\u00ednh v\u00e0o internet, s\u1edf h\u1eefu t\u1ea7m quan tr\u1ecdng kh\u00f4ng th\u1ec3 ph\u1ee7 nh\u1eadn. T\u1eeb vi\u1ec7c l\u1ef1a ch\u1ecdn v\u00e0 \u0111\u0103ng k\u00fd m\u1ed9t t\u00ean mi\u1ec1n ph\u00f9 h\u1ee3p, \u0111\u1ebfn vi\u1ec7c hi\u1ec3u s\u00e2u v\u1ec1 h\u1ec7 th\u1ed1ng gi\u1ea3i quy\u1ebft ph\u00e2n t\u00e1n ph\u1ee9c t\u1ea1p \u0111\u1eb1ng sau n\u00f3, r\u1ed3i \u0111\u1ebfn vi\u1ec7c th\u1ef1c hi\u1ec7n c\u00e1c chi\u1ebfn l\u01b0\u1ee3c qu\u1ea3n l\u00fd v\u00e0 b\u1ea3o m\u1eadt nghi\u00eam ng\u1eb7t, m\u1ed7i b\u01b0\u1edbc \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u00ednh li\u00ean t\u1ee5c v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a ho\u1ea1t \u0111\u1ed9ng kinh doanh tr\u1ef1c tuy\u1ebfn. Vi\u1ec7c n\u1eafm v\u1eefng quy tr\u00ecnh \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, nguy\u00ean l\u00fd truy v\u1ea5n ph\u00e2n c\u1ea5p c\u1ee7a DNS, ch\u1ee9c n\u0103ng c\u1ee7a c\u00e1c lo\u1ea1i b\u1ea3n ghi kh\u00e1c nhau, c\u0169ng nh\u01b0 tu\u00e2n th\u1ee7 c\u00e1c th\u1ef1c ti\u1ec5n t\u1ed1t nh\u1ea5t (bao g\u1ed3m b\u1ea3o v\u1ec7 an ninh t\u00e0i kho\u1ea3n, k\u00edch ho\u1ea1t DNSSEC, thi\u1ebft l\u1eadp t\u1ef1 \u0111\u1ed9ng gia h\u1ea1n) l\u00e0 ki\u1ebfn th\u1ee9c v\u00e0 k\u1ef9 n\u0103ng c\u01a1 b\u1ea3n m\u00e0 m\u1ecdi ch\u1ee7 s\u1edf h\u1eefu trang web, nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 nh\u00e2n vi\u00ean v\u1eadn h\u00e0nh \u0111\u1ec1u c\u1ea7n ph\u1ea3i c\u00f3. Ch\u1ec9 b\u1eb1ng c\u00e1ch qu\u1ea3n l\u00fd c\u1ea9n th\u1eadn v\u00f2ng \u0111\u1eddi c\u1ee7a t\u00ean mi\u1ec1n, ch\u00fang ta m\u1edbi c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u00e0i s\u1ea3n quan tr\u1ecdng n\u00e0y trong th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1 lu\u00f4n ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 an to\u00e0n, ph\u1ee5c v\u1ee5 b\u1ea1n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n

FAQ \u5e38\u89c1\u95ee\u9898<\/h2>\n\n\n\n

Sau khi \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n ###, bao l\u00e2u th\u00ec t\u00f4i c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o trang web \u0111\u01b0\u1ee3c?<\/p>\n\n\n\n

Sau khi \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n th\u00e0nh c\u00f4ng, v\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft, b\u1ea1n c\u00f3 th\u1ec3 ngay l\u1eadp t\u1ee9c thi\u1ebft l\u1eadp c\u00e1c b\u1ea3n ghi DNS (Domain Name System) tr\u00ean giao di\u1ec7n qu\u1ea3n tr\u1ecb c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n c\u1ee7a m\u00ecnh. Tuy nhi\u00ean, vi\u1ec7c c\u00e1c b\u1ea3n ghi DNS m\u1edbi \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng tr\u00ean to\u00e0n th\u1ebf gi\u1edbi c\u1ea7n m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh; qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cph\u00e1t t\u00e1n DNS\u201d (DNS propagation). Do th\u1eddi gian c\u1eadp nh\u1eadt b\u1ed9 nh\u1edb \u0111\u1ec7m (cache) c\u1ee7a c\u00e1c m\u00e1y ch\u1ee7 DNS kh\u00e1c nhau tr\u00ean to\u00e0n th\u1ebf gi\u1edbi kh\u00e1c nhau, th\u00f4ng th\u01b0\u1eddng c\u1ea7n t\u1eeb v\u00e0i ph\u00fat \u0111\u1ebfn 48 gi\u1edd \u0111\u1ec3 c\u00e1c thay \u0111\u1ed5i \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng ho\u00e0n to\u00e0n. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 tr\u1ef1c tuy\u1ebfn \u0111\u1ec3 ki\u1ec3m tra k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch DNS \u1edf c\u00e1c khu v\u1ef1c kh\u00e1c nhau.<\/p>\n\n

\r\n\t\r\n\t\t\r\n\t\r\n\t
\r\n\t\t
\r\n\t\t\t\r\n\t\t\t
\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\u0110\u0103ng\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t<\/div>\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t
\r\n\t\t\t\t
\r\n\t\t\t\t\t\u0110\u0103ng k\u00fd t\u00ean mi\u1ec1n Bluehost<\/strong>\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t\t\t\tH\u1ed7 tr\u1ee3 tr\u00ecnh t\u1ea1o t\u00ean mi\u1ec1n AI, d\u1ecbch v\u1ee5 h\u1ed7 tr\u1ee3 24\/7<\/span>\r\n\t\t\t\t
\r\n\t\t\t\r\n\t\t\t\t\t\t\r\n\t\t\t \r\n\t\t\t
\r\n\t\t\t\t\t\t\t\t
T\u1ea1o t\u00ean mi\u1ec1n b\u1eb1ng AI<\/div>\r\n\t\t\t\t\t\t\t\t\t\t\t\tTruy c\u1eadp Bluehost \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n \u2192<\/a>\r\n\t\t\t\t\t\t\t<\/div> \r\n\t\t<\/div>\r\n\t<\/div>\r\n\t\t\r\n\t\r\n\t
\r\n\t\t
\r\n\t\t\t\r\n\t\t\t
\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"WordPress.com\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t<\/div>\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t
\r\n\t\t\t\t
\r\n\t\t\t\t\tWordPress.com \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n<\/strong>\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t\t\t\tCh\u1ecdn g\u00f3i cao c\u1ea5p nh\u1ea5t \u0111\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m gi\u00e1 l\u00ean \u0111\u1ebfn 69% + mi\u1ec5n ph\u00ed chuy\u1ec3n t\u00ean mi\u1ec1n, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u0103ng k\u00fd t\u1eeb .com, .blog v\u00e0 h\u01a1n 350 \u0111u\u00f4i t\u00ean mi\u1ec1n kh\u00e1c.<\/span>\r\n\t\t\t\t
\r\n\t\t\t\r\n\t\t\t\t\t\t\r\n\t\t\t \r\n\t\t\t
\r\n\t\t\t\t\t\t\t\t
Mua g\u00f3i thanh to\u00e1n h\u00e0ng n\u0103m, t\u00ean mi\u1ec1n mi\u1ec5n ph\u00ed n\u0103m \u0111\u1ea7u ti\u00ean<\/div>\r\n\t\t\t\t\t\t\t\t\t\t\t\tTruy c\u1eadp \u0110\u0103ng k\u00fd t\u00ean mi\u1ec1n WordPress.com \u2192<\/a>\r\n\t\t\t\t\t\t\t<\/div> \r\n\t\t<\/div>\r\n\t<\/div>\r\n\t\t\r\n<\/div>\r\n\r\n\r\n\n\n\n\n\n\n\n

T\u00ean mi\u1ec1n b\u1ecb chi\u1ebfm \u0111o\u1ea1t l\u00e0 g\u00ec? L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ph\u00f2ng ng\u1eeba?<\/h3>\n\n\n\n

Vi\u1ec7c t\u1ea5n c\u00f4ng chi\u1ebfm \u0111o\u1ea1t t\u00ean mi\u1ec1n (domain name hijacking) x\u1ea3y ra khi k\u1ebb x\u00e2m nh\u1eadp s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c b\u1ea5t h\u1ee3p ph\u00e1p \u0111\u1ec3 \u0111o\u1ea1t quy\u1ec1n ki\u1ec3m so\u00e1t t\u00e0i kho\u1ea3n qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n, t\u1eeb \u0111\u00f3 thay \u0111\u1ed5i \u0111\u1ecba ch\u1ec9 DNS c\u1ee7a t\u00ean mi\u1ec1n \u0111\u00f3 sang m\u1ed9t trang web \u0111\u1ed9c h\u1ea1i ho\u1eb7c truy c\u1eadp th\u00f4ng tin c\u00e1 nh\u00e2n c\u1ee7a b\u1ea1n. C\u00e1c ph\u01b0\u01a1ng th\u1ee9c ph\u1ed5 bi\u1ebfn \u0111\u1ec3 th\u1ef1c hi\u1ec7n h\u00e0nh vi n\u00e0y bao g\u1ed3m: \u0111\u00e1nh c\u1eafp m\u1eadt kh\u1ea9u t\u00e0i kho\u1ea3n nh\u00e0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, s\u1eed d\u1ee5ng c\u00e1c chi\u1ebfn thu\u1eadt t\u1ea5n c\u00f4ng k\u1ef9 thu\u1eadt x<\/p>\n\n\n\n

C\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba bao g\u1ed3m: \u0110\u1eb7t m\u1ed9t m\u1eadt kh\u1ea9u m\u1ea1nh v\u00e0 duy nh\u1ea5t cho t\u00e0i kho\u1ea3n nh\u00e0 \u0111\u0103ng k\u00fd, \u0111\u1ed3ng th\u1eddi k\u00edch ho\u1ea1t x\u00e1c th\u1ef1c hai y\u1ebfu t\u1ed1; B\u1eadt t\u00ednh n\u0103ng kh\u00f3a t\u00e0i kho\u1ea3n ho\u1eb7c nh\u1eadn th\u00f4ng b\u00e1o v\u1ec1 nh\u1eefng thay \u0111\u1ed5i t\u00e0i kho\u1ea3n do nh\u00e0 \u0111\u0103ng k\u00fd cung c\u1ea5p; S\u1eed d\u1ee5ng m\u1ed9t email ri\u00eang bi\u1ec7t, c\u00f3 \u0111\u1ed9 b\u1ea3o m\u1eadt cao, l\u00e0m email li\u00ean h\u1ec7 qu\u1ea3n l\u00fd; Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 xem li\u1ec7u c\u00f3 b\u1ea5t k\u1ef3 thay \u0111\u1ed5i tr\u00e1i ph\u00e9p n\u00e0o tr\u00ean c\u00e1c b\u1ea3n ghi DNS v\u00e0 th\u00f4ng tin WHOIS c\u1ee7a t\u00ean mi\u1ec1n hay kh\u00f4ng.<\/p>\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 thi\u1ebft l\u1eadp gi\u00e1 tr\u1ecb TTL trong b\u1ea3n ghi DNS?<\/h3>\n\n\n\n

TTL l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a \u201cTime To Live\u201d, c\u00f3 \u0111\u01a1n v\u1ecb l\u00e0 gi\u00e2y. N\u00f3 quy \u0111\u1ecbnh th\u1eddi gian m\u00e0 m\u1ed9t b\u1ea3n ghi DNS (Domain Name System record) \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean c\u00e1c m\u00e1y ch\u1ee7 ph\u00e2n gi\u1ea3i (recursive servers) ho\u1eb7c trong b\u1ed9 nh\u1edb \u0111\u1ec7m c\u1ee5c b\u1ed9 (local cache). Vi\u1ec7c thi\u1ebft l\u1eadp gi\u00e1 tr\u1ecb TTL ng\u1eafn s\u1ebd khi\u1ebfn b\u1ea3n ghi \u0111\u00f3 h\u1ebft hi\u1ec7u l\u1ef1c nhanh h\u01a1n, bu\u1ed9c c\u00e1c m\u00e1y ch\u1ee7 ph\u00e2n gi\u1ea3i ph\u1ea3i g\u1eedi y\u00eau c\u1ea7u truy v\u1ea5n \u0111\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 ch\u00ednh th\u1ee9c (authoritative servers) th\u01b0\u1eddng xuy\u00ean h\u01a1n. \u0110i\u1ec1u n\u00e0y gi\u00fap c\u00e1c thay \u0111\u1ed5i \u0111\u1ed1i v\u1edbi b\u1ea3n ghi DNS \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng tr\u00ean to\u00e0n c\u1ea7u m\u1ed9t c\u00e1ch nhanh ch\u00f3ng sau khi ch\u00fang \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. Tuy nhi\u00ean, vi\u1ec7c n\u00e0y c\u0169ng s\u1ebd l\u00e0m t\u0103ng t\u1ea3i l\u00ean c\u00e1c m\u00e1y ch\u1ee7 ch\u00ednh th\u1ee9c v\u00e0 l\u00e0m t\u0103ng th\u1eddi gian ph\u00e2n gi\u1ea3i d\u1eef li\u1ec7u \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c b\u1ea3n ghi kh\u00f4ng th\u01b0\u1eddng xuy\u00ean thay \u0111\u1ed5i, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ea3n ghi MX, b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp gi\u00e1 tr\u1ecb TTL d\u00e0i h\u01a1n. \u0110\u1ed1i v\u1edbi c\u00e1c b\u1ea3n ghi c\u00f3 th\u1ec3 thay \u0111\u1ed5i th\u01b0\u1eddng xuy\u00ean ho\u1eb7c c\u1ea7n \u0111\u01b0\u1ee3c thay \u0111\u1ed5i nhanh ch\u00f3ng, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ea3n ghi A, b\u1ea1n n\u00ean thi\u1ebft l\u1eadp gi\u00e1 tr\u1ecb TTL ng\u1eafn h\u01a1n. M\u1ed9t chi\u1ebfn l\u01b0\u1ee3c c\u00e2n b\u1eb1ng ph\u1ed5 bi\u1ebfn l\u00e0 \u0111\u1eb7t gi\u00e1 tr\u1ecb TTL \u1edf m\u1ee9c trung b\u00ecnh trong qu\u00e1 tr\u00ecnh b\u00ecnh th\u01b0\u1eddng; tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n thay \u0111\u1ed5i DNS, h\u00e3y gi\u1ea3m gi\u00e1 tr\u1ecb TTL xu\u1ed1ng m\u1ed9t m\u1ee9c r\u1ea5t th\u1ea5p; sau khi thay \u0111\u1ed5i ho\u00e0n t\u1ea5t v\u00e0 h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh tr\u1edf l\u1ea1i, h\u00e3y \u0111i\u1ec1u ch\u1ec9nh gi\u00e1 tr\u1ecb TTL tr\u1edf v\u1ec1 m\u1ee9c b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n

Khi chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n (domain name) t\u1eeb m\u1ed9t nh\u00e0 cung c\u1ea5p n\u00e0y sang nh\u00e0 cung c\u1ea5p kh\u00e1c, c\u1ea7n l\u01b0u \u00fd nh\u1eefng \u0111i\u1ec1u sau:<\/h3>\n\n\n\n

Vi\u1ec7c chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n (domain transfer) l\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n t\u00ean mi\u1ec1n t\u1eeb nh\u00e0 \u0111\u0103ng k\u00fd hi\u1ec7n t\u1ea1i sang nh\u00e0 \u0111\u0103ng k\u00fd kh\u00e1c. Tr\u01b0\u1edbc ti\u00ean, b\u1ea1n c\u1ea7n \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u00ean mi\u1ec1n \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd trong v\u00f2ng 60 ng\u00e0y tr\u1edf l\u00ean v\u00e0 c\u00f2n th\u1eddi gian tr\u01b0\u1edbc khi h\u1ebft h\u1ea1n. H\u00e3y ki\u1ec3m tra xem t\u00ean mi\u1ec1n c\u00f3 b\u1ecb kh\u00f3a (locked) t\u1ea1i nh\u00e0 \u0111\u0103ng k\u00fd hi\u1ec7n t\u1ea1i hay kh\u00f4ng, v\u00e0 y\u00eau c\u1ea7u nh\u00e0 \u0111\u0103ng k\u00fd cung c\u1ea5p m\u00e3 x\u00e1c th\u1ef1c (authorization code) c\u1ea7n thi\u1ebft. Sau \u0111\u00f3, ti\u1ebfn h\u00e0nh th\u1ee7 t\u1ee5c chuy\u1ec3n nh\u01b0\u1ee3ng t\u1ea1i nh\u00e0 \u0111\u0103ng k\u00fd m\u1edbi v\u00e0 thanh to\u00e1n ph\u00ed chuy\u1ec3n nh\u01b0\u1ee3ng; kho\u1ea3n ph\u00ed n\u00e0y th\u01b0\u1eddng bao g\u1ed3m c\u1ea3 chi ph\u00ed gia h\u1ea1n t\u00ean mi\u1ec1n trong v\u00f2ng m\u1ed9t n\u0103m.<\/p>\n\n\n\n

Vi\u1ec7c chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n c\u0169ng \u0111\u00f2i h\u1ecfi t\u00ean mi\u1ec1n ph\u1ea3i \u1edf tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, kh\u00f4ng b\u1ecb kh\u00f3a, v\u00e0 b\u1ea1n ph\u1ea3i s\u1edf h\u1eefu m\u00e3 x\u00e1c th\u1ef1c (authorization code) h\u1ee3p l\u1ec7. Tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n thao t\u00e1c chuy\u1ec3n nh\u01b0\u1ee3ng, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c d\u1ecbch v\u1ee5 li\u00ean quan \u0111\u1ebfn t\u00ean mi\u1ec1n nh\u01b0 trang web, email, v.v. \u0111\u00e3 \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb s\u1eb5n s\u00e0ng cho vi\u1ec7c di chuy\u1ec3n, v\u00ec qu\u00e1 tr\u00ecnh chuy\u1ec3n nh\u01b0\u1ee3ng c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 gi\u00e1n \u0111o\u1ea1n t\u1ea1m th\u1eddi trong ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng DNS. D\u00f9 l\u00e0 chuy\u1ec3n nh\u01b0\u1ee3ng t\u1eeb nh\u00e0 \u0111\u0103ng k\u00fd n\u00e0y sang nh\u00e0 \u0111\u0103ng k\u00fd kh\u00e1c, b\u1ea1n n\u00ean ch\u1ecdn nh\u1eefng nh\u00e0 \u0111\u0103ng k\u00fd l\u1edbn, uy t\u00edn v\u00e0 \u0111\u1ecdc k\u1ef9 c\u00e1c ch\u00ednh s\u00e1ch<\/p>","protected":false},"excerpt":{"rendered":"

B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y m\u1ed9t c\u00e1ch h\u1ec7 th\u1ed1ng c\u00e1c kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u00e0 th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a h\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n (Domain Name System \u2013 DNS), \u0111\u1ed3ng th\u1eddi gi\u1ea3i th\u00edch chi ti\u1ebft to\u00e0n b\u1ed9 quy tr\u00ecnh t\u1eeb vi\u1ec7c t\u00ecm ki\u1ebfm, \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n cho \u0111\u1ebfn vi\u1ec7c \u0111\u1ed3ng b\u1ed9 h\u00f3a d\u1eef li\u1ec7u tr\u00ean to\u00e0n c\u1ea7u. B\u00e0i vi\u1ebft ph\u00e2n t\u00edch s\u00e2u r\u1ed9ng nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch t\u1ea7ng l\u1edbp trong DNS, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p c\u00e1c h\u01b0\u1edbng d\u1eabn v\u1ec1 th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n, qu\u1ea3n l\u00fd m\u00e3 \u1ee7y quy\u1ec1n (authorization codes),<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[],"knowledge_category":[279],"class_list":["post-12382670","knowledge_post","type-knowledge_post","status-publish","hentry","knowledge_category-domain"],"acf":{"site_seo_keywords":"\u57df\u540d\u6ce8\u518c\uff0cDNS\u89e3\u6790\uff0c\u57df\u540d\u7ba1\u7406\uff0cDNS\u5de5\u4f5c\u539f\u7406\uff0c\u57df\u540d\u5b89\u5168\uff0c\u6743\u5a01\u57df\u540d\u670d\u52a1\u5668\uff0c\u9012\u5f52DNS\u67e5\u8be2\uff0cWHOIS\u9690\u79c1\u4fdd\u62a4"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12382670","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts"}],"about":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/types\/knowledge_post"}],"author":[{"embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/users\/7"}],"version-history":[{"count":0,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12382670\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12382670"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12382670"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12382670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}