{"id":12380833,"date":"2026-03-23T08:45:58","date_gmt":"2026-03-23T00:45:58","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/%e6%b7%b1%e5%85%a5%e8%a7%a3%e6%9e%90%e5%9f%9f%e5%90%8d%e6%b3%a8%e5%86%8c%e3%80%81%e7%ae%a1%e7%90%86%e4%b8%8e-dns-%e8%a7%a3%e6%9e%90%ef%bc%9a%e4%b8%80%e7%ab%99%e5%bc%8f%e5%ae%8c%e5%85%a8%e6%8c%87\/"},"modified":"2026-03-23T09:01:25","modified_gmt":"2026-03-23T01:01:25","slug":"domain-registration-management-dns-guide-12380833","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/domain\/domain-registration-management-dns-guide-12380833\/","title":{"rendered":"Ph\u00e2n t\u00edch chi ti\u1ebft v\u1ec1 vi\u1ec7c \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n v\u00e0 qu\u00e1 tr\u00ecnh gi\u1ea3i m\u00e3 DNS: H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n t\u1eeb A \u0111\u1ebfn Z"},"content":{"rendered":"

T\u00ean mi\u1ec1n l\u00e0 g\u00ec v\u00e0 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng<\/h2>\n\n\n\n

Trong th\u1ebf gi\u1edbi internet, t\u00ean mi\u1ec1n \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t cu\u1ed1n s\u1ed5 \u0111\u1ecba ch\u1ec9, gi\u00fap chuy\u1ec3n \u0111\u1ed5i c\u00e1c \u0111\u1ecba ch\u1ec9 web d\u1ec5 \u0111\u1ecdc cho con ng\u01b0\u1eddi (nh\u01b0\u2026) www.example.com<\/code>Ch\u00fang \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh \u0111\u1ecba ch\u1ec9 IP m\u00e0 c\u00e1c m\u00e1y t\u00ednh s\u1eed d\u1ee5ng \u0111\u1ec3 giao ti\u1ebfp v\u1edbi nhau (v\u00ed d\u1ee5: 192.0.2.1<\/code>Vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 t\u00ean mi\u1ec1n (domain names) l\u00e0 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n \u0111\u1ec3 n\u1eafm v\u1eefng c\u00e1c k\u1ef9 thu\u1eadt m\u1ea1ng.<\/p>\n\n\n\n

H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n (Domain Name System \u2013 DNS) s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p, gi\u1ed1ng nh\u01b0 m\u1ed9t c\u00e2y \u0111\u01b0\u1ee3c \u0111\u1ea3o ng\u01b0\u1ee3c. Ph\u1ea7n n\u1eb1m b\u00ean ph\u1ea3i c\u00f9ng ch\u00ednh l\u00e0 c\u00e1c t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t (top-level domains), v\u00ed d\u1ee5 nh\u01b0\u2026 .com<\/code>\u3001.cn<\/code>\u3001.org<\/code> \u6216 .net<\/code>Ngay b\u00ean c\u1ea1nh n\u00f3 l\u00e0 c\u00e1c t\u00ean mi\u1ec1n c\u1ea5p hai (secondary domains); \u0111\u00e2y l\u00e0 ph\u1ea7n trung t\u00e2m cho vi\u1ec7c t\u00f9y ch\u1ec9nh v\u00e0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n b\u1edfi ng\u01b0\u1eddi d\u00f9ng. example<\/code>N\u1ebfu ti\u1ebfp t\u1ee5c di chuy\u1ec3n sang tr\u00e1i, c\u00f3 th\u1ec3 s\u1ebd g\u1eb7p c\u00e1c ph\u1ea7n t\u1eed thu\u1ed9c mi\u1ec1n con (subdomains). V\u00ed d\u1ee5: www<\/code> \u6216 blog<\/code>T\u00ean mi\u1ec1n \u0111\u1ea7y \u0111\u1ee7 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i c\u00e1c ph\u1ea7n n\u00e0y b\u1eb1ng d\u1ea5u ch\u1ea5m (.).<\/p>\n\n\n\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ed1t l\u00f5i c\u1ee7a h\u1ec7 th\u1ed1ng n\u00e0y d\u1ef1a tr\u00ean m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 tr\u00ean to\u00e0n th\u1ebf gi\u1edbi \u2013 DNS (Domain Name System). Khi b\u1ea1n nh\u1eadp m\u1ed9t \u0111\u1ecba ch\u1ec9 web v\u00e0o tr\u00ecnh duy\u1ec7t, thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n kh\u00f4ng th\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed c\u1ee7a m\u00e1y ch\u1ee7 trang web \u0111\u00f3 ngay l\u1eadp t\u1ee9c. Thay v\u00e0o \u0111\u00f3, thi\u1ebft b\u1ecb s\u1ebd g\u1eedi y\u00eau c\u1ea7u t\u00ecm ki\u1ebfm \u0111\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 DNS. C\u00e1c m\u00e1y ch\u1ee7 DNS n\u00e0y s\u1ebd th\u1ef1c hi\u1ec7n m\u1ed9t chu\u1ed7i c\u00e1c thao t\u00e1c truy v\u1ea5n: \u0111\u1ea7u ti\u00ean, ch\u00fang s\u1ebd h\u1ecfi m\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n g\u1ed1c (root domain server); m\u00e1y ch\u1ee7 g\u1ed1c s\u1ebd ch\u1ec9 \u0111\u1ecbnh \u0111\u1ebfn m\u00e1y ch\u1ee7 qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n t\u01b0\u01a1ng \u1ee9ng; sau \u0111\u00f3, m\u00e1y ch\u1ee7 qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n s\u1ebd truy v\u1ea5n \u0111\u1ebfn m\u00e1y ch\u1ee7 DNS ch\u00ednh th\u1ee9c (authoritative DNS server) \u0111\u1ec3 l\u1ea5y \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u00ean mi\u1ec1n \u0111\u00f3. To\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra trong v\u00e0i miligi\u00e2y v\u00e0 ho\u00e0n to\u00e0n kh\u00f4ng \u0111\u01b0\u1ee3c ng\u01b0\u1eddi d\u00f9ng nh\u1eadn th\u1ee9c. H\u1ec7 th\u1ed1ng n\u00e0y kh\u00f4ng ch\u1ec9 hi\u1ec7u qu\u1ea3 m\u00e0 c\u00f2n \u0111\u01b0\u1ee3c trang b\u1ecb c\u00e1c c\u01a1 ch\u1ebf d\u1ef1 ph\u00f2ng v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u (cache), gi\u00fap \u0111\u1ea3m b\u1ea3o truy c\u1eadp \u1ed5n \u0111\u1ecbnh cho to\u00e0n b\u1ed9 m\u1ea1ng Internet tr\u00ean to\u00e0n th\u1ebf gi\u1edbi.<\/p>\n\n\n\n

Quy tr\u00ecnh \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n \u0111\u1ea7y \u0111\u1ee7<\/h2>\n\n\n\n

Vi\u1ec7c thu\u00ea m\u1ed9t t\u00ean mi\u1ec1n b\u1eaft \u0111\u1ea7u t\u1eeb qu\u00e1 tr\u00ecnh \u0111\u0103ng k\u00fd, c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n nh\u01b0ng th\u1ef1c t\u1ebf l\u1ea1i li\u00ean quan \u0111\u1ebfn nhi\u1ec1u b\u01b0\u1edbc quan tr\u1ecdng v\u00e0 \u0111i\u1ec3m quy\u1ebft \u0111\u1ecbnh kh\u00e1c nhau.<\/p>\n\n\n\n

Tr\u01b0\u1edbc h\u1ebft, b\u1ea1n c\u1ea7n ch\u1ecdn m\u1ed9t t\u00ean mi\u1ec1n ph\u00f9 h\u1ee3p. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi h\u00ecnh \u1ea3nh th\u01b0\u01a1ng hi\u1ec7u m\u00e0 c\u00f2n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a trang web tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm (SEO) v\u00e0 kh\u1ea3 n\u0103ng ghi nh\u1edb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. M\u1ed9t t\u00ean mi\u1ec1n l\u00fd t\u01b0\u1edfng n\u00ean ng\u1eafn g\u1ecdn, d\u1ec5 nh\u1edb, d\u1ec5 \u0111\u00e1nh v\u1ea7n, v\u00e0 c\u00e0ng li\u00ean quan \u0111\u1ebfn ng\u00e0nh ngh\u1ec1 ho\u1eb7c n\u1ed9i dung c\u1ee7a b\u1ea1n c\u00e0ng t\u1ed1t. Sau \u0111\u00f3, h\u00e3y s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 ki\u1ec3m tra t\u00ean mi\u1ec1n \u0111\u1ec3 xem t\u00ean mi\u1ec1n m\u00e0 b\u1ea1n mu\u1ed1n c\u00f3 s\u1eb5n hay ch\u01b0a. N\u1ebfu t\u00ean mi\u1ec1n \u0111\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd, nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u0103ng k\u00fd s\u1ebd \u0111\u01b0a ra g\u1ee3i \u00fd ho\u1eb7c hi\u1ec3n th\u1ecb th\u00f4ng tin v\u1ec1<\/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

Sau khi x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c t\u00ean mi\u1ec1n mong mu\u1ed1n, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 ch\u1ecdn nh\u00e0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n. C\u00f3 h\u00e0ng ng\u00e0n nh\u00e0 \u0111\u0103ng k\u00fd \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn b\u1edfi ICANN, v\u00e0 m\u1ed7i nh\u00e0 \u0111\u0103ng k\u00fd \u0111\u1ec1u c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 gi\u00e1 c\u1ea3, d\u1ecbch v\u1ee5, giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng h\u1ed7 tr\u1ee3 sau n\u00e0y. Khi l\u1ef1a ch\u1ecdn, ngo\u00e0i vi\u1ec7c so s\u00e1nh gi\u00e1 \u0111\u0103ng k\u00fd ban \u0111\u1ea7u, b\u1ea1n c\u0169ng c\u1ea7n quan t\u00e2m \u0111\u1ebfn gi\u00e1 gia h\u1ea1n, li\u1ec7u d\u1ecbch v\u1ee5 b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 c\u00f3 \u0111\u01b0\u1ee3c t\u00ednh ph\u00ed hay kh\u00f4ng, v\u00e0 li\u1ec7u giao di\u1ec7n qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n c\u00f3 d\u1ec5 s\u1eed d\u1ee5ng hay kh\u00f4ng. M\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 \u0111\u01b0a ra m\u1ee9c gi\u00e1 r\u1ea5t th\u1ea5p trong n\u0103m \u0111\u1ea7u ti\u00ean, nh\u01b0ng c\u00e1c kho\u1ea3n ph\u00ed sau \u0111\u00f3 l\u1ea1i cao.<\/p>\n\n\n\n

Trong qu\u00e1 tr\u00ecnh \u0111\u0103ng k\u00fd, b\u1ea1n c\u1ea7n cung c\u1ea5p th\u00f4ng tin \u0111\u0103ng k\u00fd ch\u00ednh x\u00e1c v\u00e0 th\u1ef1c t\u1ebf; nh\u1eefng th\u00f4ng tin n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong c\u01a1 s\u1edf d\u1eef li\u1ec7u WHOIS c\u00f4ng khai. V\u00ec l\u00fd do b\u1ea3o m\u1eadt, nhi\u1ec1u ng\u01b0\u1eddi ch\u1ecdn d\u1ecbch v\u1ee5 b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 cho th\u00f4ng tin WHOIS c\u00f3 ph\u00ed, \u0111\u1ec3 thay th\u1ebf th\u00f4ng tin c\u00e1 nh\u00e2n c\u1ee7a h\u1ecd b\u1eb1ng th\u00f4ng tin c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u0103ng k\u00fd. Sau khi \u0111i\u1ec1n \u0111\u1ea7y \u0111\u1ee7 th\u00f4ng tin, h\u00e3y ch\u1ecdn th\u1eddi h\u1ea1n \u0111\u0103ng k\u00fd v\u00e0 ho\u00e0n t\u1ea5t vi\u1ec7c thanh to\u00e1n. Khi \u0111\u0103ng k\u00fd th\u00e0nh c\u00f4ng, quy\u1ec1n qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n s\u1ebd thu\u1ed9c v\u1ec1 b\u1ea1n. Tuy nhi\u00ean, l\u01b0u \u00fd r\u1eb1ng b\u1ea1n ch\u1ec9 s\u1edf h\u1eefu quy\u1ec1n s\u1eed d\u1ee5ng t\u00ean mi\u1ec1n, ch\u1ee9 kh\u00f4ng ph\u1ea3i quy\u1ec1n s\u1edf h\u1eefu; quy\u1ec1n s\u1eed d\u1ee5ng n\u00e0y \u0111\u01b0\u1ee3c duy tr\u00ec th\u00f4ng qua vi\u1ec7c thanh to\u00e1n h\u00e0ng n\u0103m.<\/p>\n\n\n\n

Qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n v\u00e0 c\u1ea5u h\u00ecnh quan tr\u1ecdng<\/h2>\n\n\n\n

Sau khi \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n th\u00e0nh c\u00f4ng, vi\u1ec7c qu\u1ea3n l\u00fd hi\u1ec7u qu\u1ea3 v\u00e0 c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o d\u1ecbch v\u1ee5 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh. Vi\u1ec7c n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n t\u00ean mi\u1ec1n do nh\u00e0 \u0111\u0103ng k\u00fd cung c\u1ea5p.<\/p>\n\n\n\n

M\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n (Domain Name Server \u2013 DNS) l\u00e0 h\u1ec7 th\u1ed1ng d\u00f9ng \u0111\u1ec3 qu\u1ea3n l\u00fd v\u00e0 \u0111\u1ecbnh tuy\u1ebfn c\u00e1c t\u00ean mi\u1ec1n tr\u00ean m\u1ea1ng Internet. Sau khi \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, b\u1ea1n c\u1ea7n ch\u1ec9 \u0111\u1ecbnh c\u00e1c b\u1ea3n ghi NS (Name Server) c\u1ee7a t\u00ean mi\u1ec1n \u0111\u00f3 t\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef v\u00e0 qu\u1ea3n l\u00fd DNS c\u1ee7a m\u00ecnh. C\u00e1ch ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 DNS \u0111\u01b0\u1ee3c cung c\u1ea5p s\u1eb5n b\u1edfi nh\u00e0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, ho\u1eb7c s\u1eed d\u1ee5ng c\u00e1c d\u1ecbch v\u1ee5 c\u1ee7a b\u00ean th\u1ee9 ba chuy\u00ean nghi\u1ec7p. Sau khi thay \u0111\u1ed5i c\u00e1c b\u1ea3n ghi NS, qu\u00e1 tr\u00ecnh c\u1eadp nh\u1eadt th\u00f4ng tin t\u00ean mi\u1ec1n tr\u00ean to\u00e0n th\u1ebf gi\u1edbi c\u00f3 th\u1ec3 m\u1ea5t t\u1eeb v\u00e0i gi\u1edd \u0111\u1ebfn 48 gi\u1edd; qu\u00e1 tr\u00ecnh<\/p>\n\n\n\n

Trong giao di\u1ec7n qu\u1ea3n l\u00fd DNS, b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp nhi\u1ec1u lo\u1ea1i b\u1ea3n ghi gi\u1ea3i m\u00e3 kh\u00e1c nhau. B\u1ea3n ghi A l\u00e0 lo\u1ea1i c\u01a1 b\u1ea3n nh\u1ea5t; n\u00f3 li\u00ean k\u1ebft t\u00ean mi\u1ec1n v\u1edbi m\u1ed9t \u0111\u1ecba ch\u1ec9 IPv4. B\u1ea3n ghi AAAA t\u01b0\u01a1ng \u1ee9ng v\u1edbi \u0111\u1ecba ch\u1ec9 IPv6. B\u1ea3n ghi CNAME \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o t\u00ean mi\u1ec1n con (alias), li\u00ean k\u1ebft m\u1ed9t t\u00ean mi\u1ec1n v\u1edbi m\u1ed9t t\u00ean mi\u1ec1n kh\u00e1c. \u0110i\u1ec1u n\u00e0y r\u1ea5t h\u1eefu \u00edch khi b\u1ea1n mu\u1ed1n qu\u1ea3n l\u00fd nhi\u1ec1u t\u00ean mi\u1ec1n m\u1ed9t c\u00e1ch t\u1ed5 ch\u1ee9c h\u01a1n. www.example.com<\/code> \u0111\u1ebfn example.com<\/code> R\u1ea5t h\u1eefu \u00edch. C\u00e1c b\u1ea3n ghi MX (Mail Exchange) c\u00f3 nhi\u1ec7m v\u1ee5 \u0111\u1ecbnh tuy\u1ebfn email, ch\u1ec9 \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 m\u00e1y ch\u1ee7 email nh\u1eadn email cho m\u1ed9t t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3. C\u00e1c b\u1ea3n ghi TXT th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u01b0u tr\u1eef th\u00f4ng tin x\u00e1c th\u1ef1c email nh\u01b0 SPF (Sender Policy Framework) v\u00e0 DKIM (DomainKeys Identified Mail), ho\u1eb7c m\u00e3 x\u00e1c th\u1ef1c quy\u1ec1n s\u1edf h\u1eefu t\u00ean mi\u1ec1n.<\/p>\n\n\n\n

M\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng kh\u00e1c l\u00e0 m\u00e3 tr\u1ea1ng th\u00e1i t\u00ean mi\u1ec1n (domain status code). V\u00ed d\u1ee5, tr\u1ea1ng th\u00e1i \u201cclientTransferProhibited\u201d c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c chuy\u1ec3n nh\u01b0\u1ee3ng tr\u00e1i ph\u00e9p t\u00ean mi\u1ec1n, v\u00e0 b\u1ea1n n\u00ean b\u1eadt ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7 n\u00e0y cho nh\u1eefng t\u00ean mi\u1ec1n quan tr\u1ecdng. Vi\u1ec7c ki\u1ec3m tra v\u00e0 qu\u1ea3n l\u00fd th\u01b0\u1eddng xuy\u00ean c\u00e1c m\u00e3 tr\u1ea1ng th\u00e1i n\u00e0y l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong c\u00f4ng t\u00e1c b\u1ea3o m\u1eadt.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch s\u00e2u v\u1ec1 qu\u00e1 tr\u00ecnh gi\u1ea3i m\u00e3 DNS (Domain Name System)<\/h2>\n\n\n\n

DNS (Domain Name System) l\u00e0 trung t\u00e2m truy xu\u1ea5t \u1ea9n gi\u1ea5u c\u1ee7a Internet, v\u00e0 thi\u1ebft k\u1ebf ph\u1ee9c t\u1ea1p nh\u01b0ng tinh x\u1ea3o c\u1ee7a n\u00f3 r\u1ea5t \u0111\u00e1ng \u0111\u1ec3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u k\u1ef9 l\u01b0\u1ee1ng. Qu\u00e1 tr\u00ecnh gi\u1ea3i m\u00e3 t\u00ean mi\u1ec1n ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i: truy v\u1ea5n tu\u1ea7n ho\u00e0n (recursive query) v\u00e0 truy v\u1ea5n l\u1eb7p l\u1ea1i (iterative query). Khi ch\u00fang ta truy c\u1eadp c\u00e1c trang web h\u00e0ng ng\u00e0y, qu\u00e1 tr\u00ecnh truy v\u1ea5n tu\u1ea7n ho\u00e0n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n; tr\u00ecnh gi\u1ea3i m\u00e3 t\u00ean mi\u1ec1n tr\u00ean m\u00e1y t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng s\u1ebd th\u1ef1c hi\u1ec7n to\u00e0n b\u1ed9 c\u00f4ng vi\u1ec7c truy v\u1ea5n thay m\u1eb7t ng\u01b0\u1eddi d\u00f9ng cho \u0111\u1ebfn khi nh\u1eadn \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng.<\/p>\n\n\n\n

\u0110\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t v\u00e0 gi\u1ea3m b\u1edbt \u00e1p l\u1ef1c l\u00ean c\u00e1c m\u00e1y ch\u1ee7 g\u1ed1c, DNS s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i c\u01a1 ch\u1ebf \u0111\u1ec7m (cache). Sau khi nh\u1eadn \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 truy v\u1ea5n, c\u00e1c m\u00e1y ch\u1ee7 \u0111\u1ec7m (recursive servers) s\u1ebd l\u01b0u tr\u1eef k\u1ebft qu\u1ea3 \u0111\u00f3 trong m\u1ed9t th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh d\u1ef1a tr\u00ean gi\u00e1 tr\u1ecb TTL (Time To Live) \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh trong k\u1ebft qu\u1ea3 truy v\u1ea5n. Trong th\u1eddi gian n\u00e0y, c\u00f9ng m\u1ed9t truy v\u1ea5n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tr\u1ea3 l\u1eddi tr\u1ef1c ti\u1ebfp t\u1eeb b\u1ed9 \u0111\u1ec7m, gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 \u0111\u00e1ng k\u1ec3. H\u1ec7 \u0111i\u1ec1u h\u00e0nh c\u1ee5c b\u1ed9 v\u00e0 tr\u00ecnh duy\u1ec7t c\u0169ng c\u00f3 b\u1ed9 \u0111\u1ec7m DNS ri\u00eang c\u1ee7a ch\u00fang.<\/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

Ngo\u00e0i c\u00e1c lo\u1ea1i b\u1ea3n ghi th\u00f4ng th\u01b0\u1eddng, c\u00f2n c\u00f3 m\u1ed9t s\u1ed1 lo\u1ea1i b\u1ea3n ghi n\u00e2ng cao th\u1ef1c hi\u1ec7n c\u00e1c ch\u1ee9c n\u0103ng \u0111\u1eb7c bi\u1ec7t. B\u1ea3n ghi SRV d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a c\u00e1c d\u1ecbch v\u1ee5 c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 d\u1ecbch v\u1ee5 VoIP ho\u1eb7c tr\u00f2 chuy\u1ec7n t\u1ee9c th\u00ec. B\u1ea3n ghi CAA cho ph\u00e9p ch\u1ee7 s\u1edf h\u1eefu t\u00ean mi\u1ec1n ch\u1ec9 \u0111\u1ecbnh nh\u1eefng t\u1ed5 ch\u1ee9c c\u1ea5p ch\u1ee9ng ch\u1ec9 n\u00e0o \u0111\u01b0\u1ee3c ph\u00e9p c\u1ea5p ch\u1ee9ng ch\u1ec9 SSL cho t\u00ean mi\u1ec1n c\u1ee7a h\u1ecd, t\u1eeb \u0111\u00f3 n\u00e2ng cao m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt. B\u1ea3n ghi PTR \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho vi\u1ec7c gi\u1ea3i m\u00e3 ng\u01b0\u1ee3c (reverse resolution), t\u1ee9c l\u00e0 t\u00ecm t\u00ean mi\u1ec1n t\u1eeb \u0111\u1ecba ch\u1ec9 IP, th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong vi\u1ec7c x\u00e1c th\u1ef1c m\u00e1y ch\u1ee7 email.<\/p>\n\n\n\n

An ninh DNS c\u0169ng kh\u00f4ng th\u1ec3 b\u1ecb b\u1ecf qua. T\u00ecnh tr\u1ea1ng t\u1ea5n c\u00f4ng ho\u1eb7c l\u00e0m sai l\u1ec7ch d\u1eef li\u1ec7u DNS (DNS hijacking\/dNS poisoning) l\u00e0 nh\u1eefng m\u1ed1i \u0111e d\u1ecda ph\u1ed5 bi\u1ebfn. \u0110\u1ec3 \u0111\u1ed1i ph\u00f3 v\u1edbi nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y, DNSSEC (Domain Name System Security Extensions) \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n. DNSSEC s\u1eed d\u1ee5ng ch\u1eef k\u00fd s\u1ed1 \u0111\u1ec3 x\u00e1c th\u1ef1c t\u00ednh ch\u00ednh x\u00e1c v\u00e0 to\u00e0n v\u1eb9n 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 thay \u0111\u1ed5i. L\u00e0 ng\u01b0\u1eddi qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n, vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 DNSSEC v\u00e0 tri\u1ec3n khai n\u00f3 khi \u0111i\u1ec1u ki\u1ec7n cho ph\u00e9p l\u00e0 m\u1ed9t th\u1ef1c ti\u1ec5n quan tr\u1ecdng trong b\u1ea3o m\u1eadt m\u1ea1ng hi\u1ec7n \u0111\u1ea1i.<\/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 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n c\u1ee7a h\u1ec7 th\u1ed1ng internet, vi\u1ec7c \u0111\u0103ng k\u00fd, qu\u1ea3n l\u00fd v\u00e0 gi\u1ea3i quy\u1ebft (DNS) ch\u00fang t\u1ea1o n\u00ean m\u1ed9t h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt ho\u00e0n ch\u1ec9nh v\u00e0 li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd v\u1edbi nhau. Qu\u00e1 tr\u00ecnh b\u1eaft \u0111\u1ea7u t\u1eeb vi\u1ec7c ch\u1ecdn m\u1ed9t t\u00ean mi\u1ec1n ph\u1ea3n \u00e1nh \u0111\u00fang b\u1ea3n ch\u1ea5t c\u1ee7a doanh nghi\u1ec7p, ti\u1ebfp theo l\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c th\u1ee7 t\u1ee5c \u0111\u0103ng k\u00fd nghi\u00eam ng\u1eb7t, v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 qu\u1ea3n l\u00fd chi ti\u1ebft th\u00f4ng qua b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n (control panel). M\u1ed7i b\u01b0\u1edbc trong qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn s\u1ef1 \u1ed5n \u0111\u1ecbnh v\u00e0 b\u1ea3o m\u1eadt c\u1ee7a t\u00e0i s\u1ea3n tr\u1ef1c tuy\u1ebfn. H\u1ec7 th\u1ed1ng DNS, ho\u1ea1t \u0111\u1ed9ng \u00e2m th\u1ea7m ph\u00eda sau, th\u00f4ng qua c\u01a1 ch\u1ebf truy v\u1ea5n v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3, ph\u00e2n t\u00e1n, bi\u1ebfn nh\u1eefng t\u00ean mi\u1ec1n \u0111\u01a1n gi\u1ea3n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn, t\u1eeb \u0111\u00f3 k\u1ebft n\u1ed1i to\u00e0n b\u1ed9 th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1 l\u1ea1i v\u1edbi nhau.<\/p>\n\n\n\n

Vi\u1ec7c hi\u1ec3u s\u00e2u v\u1ec1 to\u00e0n b\u1ed9 quy tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap b\u1ea1n qu\u1ea3n l\u00fd t\u00e0i s\u1ea3n m\u1ea1ng c\u1ee7a m\u00ecnh m\u1ed9t c\u00e1ch chuy\u00ean nghi\u1ec7p h\u01a1n, m\u00e0 c\u00f2n gi\u00fap b\u1ea1n nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 trang web kh\u00f4ng th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c, email kh\u00f4ng \u0111\u01b0\u1ee3c g\u1eedi ho\u1eb7c nh\u1eadn \u0111\u01b0\u1ee3c. Trong th\u1eddi \u0111\u1ea1i c\u00f4ng ngh\u1ec7 thay \u0111\u1ed5i t\u1eebng ng\u00e0y, vi\u1ec7c n\u1eafm v\u1eefng nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u00e0 c\u1ed1t l\u00f5i n\u00e0y l\u00e0 \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 ti\u1ebfn b\u1ed9 m\u1ed9t c\u00e1ch \u1ed5n \u0111\u1ecbnh trong th\u1ebf gi\u1edbi internet.<\/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 n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp tr\u00ean to\u00e0n th\u1ebf gi\u1edbi?<\/p>\n\n\n\n

Vi\u1ec7c \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n ngay l\u1eadp t\u1ee9c, nh\u01b0ng kh\u1ea3 n\u0103ng truy c\u1eadp v\u00e0o t\u00ean mi\u1ec1n \u0111\u00f3 tr\u00ean to\u00e0n th\u1ebf gi\u1edbi ph\u1ee5 thu\u1ed9c v\u00e0o th\u1eddi gian truy\u1ec1n th\u00f4ng tin DNS (Domain Name System). Khi b\u1ea1n thay \u0111\u1ed5i c\u00e1c b\u1ea3n ghi DNS c\u1ee7a t\u00ean mi\u1ec1n, c\u00e1c m\u00e1y ch\u1ee7 DNS recursive tr\u00ean kh\u1eafp th\u1ebf gi\u1edbi c\u1ea7n th\u1eddi gian \u0111\u1ec3 c\u1eadp nh\u1eadt d\u1eef li\u1ec7u trong b\u1ed9 nh\u1edb \u0111\u1ec7m (cache) c\u1ee7a ch\u00fang. Qu\u00e1 tr\u00ecnh truy\u1ec1n th\u00f4ng tin n\u00e0y th\u01b0\u1eddng m\u1ea5t t\u1eeb v\u00e0i ph\u00fat \u0111\u1ebfn 48 gi\u1edd. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 ki\u1ec3m tra truy\u1ec1n th\u00f4ng tin DNS tr\u1ef1c tuy\u1ebfn \u0111\u1ec3 xem tr\u1ea1ng th\u00e1i gi\u1ea3i quy\u1ebft t\u00ean mi\u1ec1n t\u1ea1i c\u00e1c khu v\u1ef1c kh\u00e1c nhau tr\u00ean th\u1ebf gi\u1edbi.<\/p>\n\n

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\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
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\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
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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
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\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
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\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
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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

B\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 t\u00ean mi\u1ec1n l\u00e0 g\u00ec? C\u00f3 c\u1ea7n mua kh\u00f4ng?<\/h3>\n\n\n\n

Khi \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n, th\u00f4ng tin c\u00e1 nh\u00e2n c\u1ee7a b\u1ea1n nh\u01b0 t\u00ean, \u0111\u1ecba ch\u1ec9, s\u1ed1 \u0111i\u1ec7n tho\u1ea1i v\u00e0 email s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong c\u01a1 s\u1edf d\u1eef li\u1ec7u WHOIS c\u00f4ng khai. D\u1ecbch v\u1ee5 b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 t\u00ean mi\u1ec1n l\u00e0 m\u1ed9t d\u1ecbch v\u1ee5 c\u00f3 ph\u00ed; n\u00f3 s\u1ebd thay th\u1ebf th\u00f4ng tin c\u00e1 nh\u00e2n th\u1ef1c t\u1ebf c\u1ee7a b\u1ea1n b\u1eb1ng th\u00f4ng tin li\u00ean h\u1ec7 c\u1ee7a nh\u00e0 \u0111\u0103ng k\u00fd ho\u1eb7c c\u00f4ng ty \u0111\u1ea1i l\u00fd, nh\u1eb1m ng\u0103n ch\u1eb7n hi\u1ec7u qu\u1ea3 c\u00e1c email r\u00e1c, cu\u1ed9c g\u1ecdi l\u1eeba \u0111\u1ea3o ho\u1eb7c vi\u1ec7c r\u00f2 r\u1ec9 th\u00f4ng tin c\u00e1 nh\u00e2n. \u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng c\u00e1 nh\u00e2n ho\u1eb7c c\u00e1c doanh nghi\u1ec7p coi tr\u1ecdng quy\u1ec1n ri\u00eang t\u01b0, vi\u1ec7c mua d\u1ecbch v\u1ee5 n\u00e0y l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n

DNS (Domain Name System) gi\u1ea3i quy\u1ebft th\u1ea5t b\u1ea1i th\u01b0\u1eddng c\u00f3 nh\u1eefng nguy\u00ean nh\u00e2n sau:<\/h3>\n\n\n\n

S\u1ef1 c\u1ed1 gi\u1ea3i quy\u1ebft DNS (Domain Name System) c\u00f3 th\u1ec3 x\u1ea3y ra do nhi\u1ec1u nguy\u00ean nh\u00e2n kh\u00e1c nhau. Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 l\u1ed7i m\u00e1y ch\u1ee7 DNS c\u1ee5c b\u1ed9 ho\u1eb7c c\u00e0i \u0111\u1eb7t m\u1ea1ng kh\u00f4ng ch\u00ednh x\u00e1c; b\u1ea1n c\u00f3 th\u1ec3 th\u1eed s\u1eed d\u1ee5ng c\u00e1c m\u00e1y ch\u1ee7 DNS c\u00f4ng c\u1ed9ng nh\u01b0 114.114.114.114 ho\u1eb7c 8.8.8.8. M\u1ed9t kh\u1ea3 n\u0103ng kh\u00e1c l\u00e0 th\u00f4ng tin DNS c\u1ee7a ch\u00ednh t\u00ean mi\u1ec1n kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u00fang c\u00e1ch ho\u1eb7c ch\u01b0a c\u00f3 hi\u1ec7u l\u1ef1c; b\u1ea1n c\u1ea7n ki\u1ec3m tra c\u00e1c b\u1ea3n ghi A, CNAME, v.v. Vi\u1ec7c t\u00ean mi\u1ec1n h\u1ebft h\u1ea1n m\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c gia h\u1ea1n c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 gi\u1ea3i quy\u1ebft. Ngo\u00e0i ra, t\u1ec7p hosts c\u1ee5c b\u1ed9 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng b\u1ecb s\u1eeda \u0111\u1ed5i ho\u1eb7c b\u1ed9 \u0111\u1ec7m DNS tr\u00ean m\u00e1y kh\u00e1ch ho\u1ea1t \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng c\u0169ng c\u00f3 th\u1ec3 g\u00e2y ra v\u1ea5n \u0111\u1ec1.<\/p>\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 chuy\u1ec3n t\u00ean mi\u1ec1n sang m\u1ed9t nh\u00e0 \u0111\u0103ng k\u00fd kh\u00e1c?<\/h3>\n\n\n\n

Vi\u1ec7c chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n th\u01b0\u1eddng y\u00eau c\u1ea7u m\u1ed9t s\u1ed1 b\u01b0\u1edbc nh\u1ea5t \u0111\u1ecbnh. Tr\u01b0\u1edbc h\u1ebft, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd trong v\u00f2ng h\u01a1n 60 ng\u00e0y v\u00e0 c\u00f2n th\u1eddi gian tr\u01b0\u1edbc khi h\u1ebft h\u1ea1n. H\u00e3y y\u00eau c\u1ea7u nh\u00e0 \u0111\u0103ng k\u00fd hi\u1ec7n t\u1ea1i gi\u1ea3i ph\u00f3ng kh\u00f3a chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n v\u00e0 cung c\u1ea5p m\u00e3 x\u00e1c th\u1ef1c chuy\u1ec3n nh\u01b0\u1ee3ng. Sau \u0111\u00f3, h\u00e3y ti\u1ebfn h\u00e0nh \u0111\u0103ng k\u00fd chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n t\u1ea1i nh\u00e0 \u0111\u0103ng k\u00fd m\u1edbi v\u00e0 thanh to\u00e1n ph\u00ed gia h\u1ea1n \u00edt nh\u1ea5t cho m\u1ed9t n\u0103m. Nh\u1eadp m\u00e3 x\u00e1c th\u1ef1c \u0111\u01b0\u1ee3c cung c\u1ea5p theo h\u01b0\u1edbng d\u1eabn v\u00e0 x\u00e1c nh\u1eadn y\u00eau c\u1ea7u chuy\u1ec3n nh\u01b0\u1ee3ng. Cu\u1ed1i c\u00f9ng, nh\u00e0 \u0111\u0103ng k\u00fd hi\u1ec7n t\u1ea1i s\u1ebd g\u1eedi email x\u00e1c nh\u1eadn; b\u1ea1n c\u1ea7n \u0111\u1ed3ng \u00fd v\u1edbi vi\u1ec7c chuy\u1ec3n nh\u01b0\u1ee3ng t\u00ean mi\u1ec1n. To\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh n\u00e0y th\u01b0\u1eddng m\u1ea5t kho\u1ea3ng 5 \u0111\u1ebfn 7 ng\u00e0y \u0111\u1ec3 ho\u00e0n t\u1ea5t.<\/p>\n\n\n\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa A-record v\u00e0 CNAME-record l\u00e0 g\u00ec?<\/h3>\n\n\n\n

B\u1ea3n ghi A (A record) l\u00e0 b\u1ea3n ghi d\u00f9ng \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i m\u1ed9t t\u00ean mi\u1ec1n tr\u1ef1c ti\u1ebfp th\u00e0nh m\u1ed9t \u0111\u1ecba ch\u1ec9 IPv4. V\u00ed d\u1ee5, khi b\u1ea1n th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y, t\u00ean mi\u1ec1n s\u1ebd \u0111\u01b0\u1ee3c li\u00ean k\u1ebft tr\u1ef1c ti\u1ebfp v\u1edbi \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng. example.com<\/code> \u0111\u1ebfn 192.0.2.1<\/code>CNAME (Canonical Name) l\u00e0 lo\u1ea1i b\u1ea3n ghi t\u00ean mi\u1ec1n (domain name record) d\u00f9ng \u0111\u1ec3 \u0111\u1ecbnh tuy\u1ebfn m\u1ed9t t\u00ean mi\u1ec1n \u0111\u1ebfn m\u1ed9t t\u00ean mi\u1ec1n kh\u00e1c, thay v\u00ec \u0111\u1ebfn m\u1ed9t \u0111\u1ecba ch\u1ec9 IP. V\u00ed d\u1ee5, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng CNAME \u0111\u1ec3 chuy\u1ec3n h\u01b0\u1edbng truy c\u1eadp t\u1eeb t\u00ean mi\u1ec1n \u201cexample.com\u201d \u0111\u1ebfn t\u00ean mi\u1ec1n \u201csubdomain.example.com\u201d. www.example.com<\/code> \u0111\u1ebfn example.com<\/code>Trong t\u1ea5t c\u1ea3 c\u00e1c b\u1ea3n ghi, m\u1ed9t t\u00ean mi\u1ec1n th\u01b0\u1eddng ch\u1ec9 c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t b\u1ea3n ghi lo\u1ea1i A (A record), nh\u01b0ng c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u b\u1ea3n ghi lo\u1ea1i CNAME (CNAME record). Tuy nhi\u00ean, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng vi\u1ec7c s\u1eed d\u1ee5ng b\u1ea3n ghi lo\u1ea1i CNAME cho t\u00ean mi\u1ec1n g\u1ed1c (root domain) \u0111\u00f4i khi kh\u00f4ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb, v\u00ec \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u l\u1ef1c c\u1ee7a c\u00e1c b\u1ea3n ghi kh\u00e1c nh\u01b0 b\u1ea3n ghi lo\u1ea1i MX (MX record).<\/p>","protected":false},"excerpt":{"rendered":"

B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y m\u1ed9t c\u00e1ch h\u1ec7 th\u1ed1ng v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u00ean mi\u1ec1n, quy tr\u00ecnh \u0111\u0103ng k\u00fd, c\u00e1ch qu\u1ea3n l\u00fd v\u00e0 c\u1ea5u h\u00ecnh, c\u0169ng nh\u01b0 c\u01a1 ch\u1ebf gi\u1ea3i m\u00e3 DNS (Domain Name System). N\u00f3 m\u00f4 t\u1ea3 chi ti\u1ebft v\u1ec1 c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p c\u1ee7a t\u00ean mi\u1ec1n, c\u00e1ch l\u1ef1a ch\u1ecdn nh\u00e0 \u0111\u0103ng k\u00fd, c\u00e1ch thi\u1ebft l\u1eadp c\u00e1c lo\u1ea1i b\u1ea3n ghi DNS, \u0111\u1ed3ng th\u1eddi ph\u00e2n t\u00edch c\u00e1c kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i nh\u01b0 truy v\u1ea5n \u0111\u1ec7 quy, l\u01b0u tr\u1eef \u0111\u1ec7m (cache) v\u00e0 b\u1ea3o m\u1eadt. \u0110\u00e2y l\u00e0 m\u1ed9t h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 t\u00ean mi\u1ec1n v\u00e0 c\u00f4ng ngh\u1ec7 DNS<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[],"knowledge_category":[279],"class_list":["post-12380833","knowledge_post","type-knowledge_post","status-publish","hentry","knowledge_category-domain"],"acf":{"site_seo_keywords":"\u57df\u540d\u6ce8\u518c\uff0c\u57df\u540d\u7ba1\u7406\uff0cDNS\u89e3\u6790\uff0c\u57df\u540d\u7cfb\u7edf\u5de5\u4f5c\u539f\u7406\uff0c\u57df\u540d\u670d\u52a1\u5668\u914d\u7f6e\uff0cDNS\u8bb0\u5f55\u7c7b\u578b\uff0c\u57df\u540d\u5b89\u5168\uff0c\u57df\u540d\u9009\u62e9\u6307\u5357"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12380833","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\/12380833\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12380833"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12380833"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12380833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}