{"id":12892,"date":"2022-06-12T13:12:10","date_gmt":"2022-06-12T06:12:10","guid":{"rendered":"https:\/\/hostify.vn\/blog\/?p=12892"},"modified":"2022-06-12T13:12:10","modified_gmt":"2022-06-12T06:12:10","slug":"cname-la-gi-cach-tao-va-chinh-sua-cname","status":"publish","type":"post","link":"https:\/\/www.hostify.vn\/blog\/cname-la-gi-cach-tao-va-chinh-sua-cname\/","title":{"rendered":"Cname l\u00e0 g\u00ec? C\u00e1ch t\u1ea1o, ch\u1ec9nh s\u1eeda v\u00e0 x\u00f3a c\u00e1c b\u1ea3n ghi CNAME"},"content":{"rendered":"

\"CNAME<\/strong><\/p>\n

CNAME l\u00e0 g\u00ec?<\/h3>\n

B\u1ea3n ghi CNAME, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1ea3n ghi \u201ct\u00ean quy chu\u1ea9n\u201d, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ec9 \u0111\u1ecbnh m\u1ed9t t\u00ean mi\u1ec1n l\u00e0 alias c\u1ee7a m\u1ed9t t\u00ean mi\u1ec1n kh\u00e1c, ch\u00ednh l\u00e0 t\u00ean mi\u1ec1n \u201cquy chu\u1ea9n\u201d.<\/p>\n

V\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh nh\u1ea5t c\u1ee7a CNAME l\u00e0 khi b\u1ea1n c\u00f3 c\u1ea3 hai t\u00ean mi\u1ec1n domain1.com v\u00e0 www.domain1.com c\u00f9ng tr\u1ecf v\u1ec1 m\u1ed9t website v\u00e0 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean c\u00f9ng m\u1ed9t m\u00e1y ch\u1ee7. \u0110\u1ec3 tr\u00e1nh vi\u1ec7c ph\u1ea3i duy tr\u00ec hai b\u1ea3n ghi kh\u00e1c nhau, ch\u00fang ta th\u01b0\u1eddng t\u1ea1o m\u1ed9t b\u1ea3n ghi A cho t\u00ean mi\u1ec1n domain1.com tr\u1ecf v\u1ec1 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7, v\u00e0 m\u1ed9t b\u1ea3n ghi CNAME cho t\u00ean mi\u1ec1n www.domain1.com tr\u1ecf v\u1ec1 domain1.com.<\/p>\n

K\u1ebft qu\u1ea3 l\u00e0, domain1.com tr\u1ecf v\u1ec1 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7, v\u00e0 www.domain1.com tr\u1ecf v\u1ec1 c\u00f9ng \u0111\u1ecba ch\u1ec9 \u0111\u00f3 th\u00f4ng qua domain1.com. N\u1ebfu \u0111\u1ecba ch\u1ec9 IP thay \u0111\u1ed5i, b\u1ea1n ch\u1ec9 c\u1ea7n c\u1eadp nh\u1eadt n\u00f3 \u1edf m\u1ed9t n\u01a1i: ch\u1ec9 c\u1ea7n ch\u1ec9nh s\u1eeda b\u1ea3n ghi A cho domain1.com, v\u00e0 www.domain1.com s\u1ebd t\u1ef1 \u0111\u1ed9ng c\u1eadp nh\u1eadt c\u00e1c thay \u0111\u1ed5i li\u00ean quan.<\/p>\n

L\u01b0u \u00fd r\u1eb1ng, m\u1ed9t b\u1ea3n ghi CNAME ph\u1ea3i lu\u00f4n \u0111\u01b0\u1ee3c tr\u1ecf \u0111\u1ebfn m\u1ed9t t\u00ean mi\u1ec1n kh\u00e1c v\u00e0 kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c tr\u1ecf tr\u1ef1c ti\u1ebfp \u0111\u1ebfn m\u1ed9t \u0111\u1ecba ch\u1ec9 IP. B\u00ean c\u1ea1nh \u0111\u00f3, m\u1ed9t b\u1ea3n ghi CNAME kh\u00f4ng th\u1ec3 c\u00f9ng t\u1ed3n t\u1ea1i v\u1edbi m\u1ed9t b\u1ea3n ghi kh\u00e1c c\u00f9ng t\u00ean. Kh\u00f4ng th\u1ec3 c\u00f9ng t\u1ed3n t\u1ea1i m\u1ed9t b\u1ea3n ghi CNAME v\u00e0 m\u1ed9t b\u1ea3n ghi TXT cho www.domain1.com.<\/p>\n

Cu\u1ed1i c\u00f9ng, m\u1ed9t CNAME c\u00f3 th\u1ec3 tr\u1ecf \u0111\u1ebfn m\u1ed9t CNAME kh\u00e1c, d\u00f9 c\u00e1ch c\u1ea5u h\u00ecnh n\u00e0y nh\u00ecn chung kh\u00f4ng \u0111\u01b0\u1ee3c khuy\u1ebfn c\u00e1o do nh\u1eefng l\u00fd do v\u1ec1 m\u1eb7t hi\u1ec7u n\u0103ng. N\u1ebfu c\u1ea5u h\u00ecnh nh\u01b0 v\u1eady, CNAME n\u00ean tr\u1ecf c\u00e0ng g\u1ea7n \u0111\u1ebfn t\u00ean m\u1ee5c ti\u00eau c\u00e0ng t\u1ed1t \u0111\u1ec3 tr\u00e1nh b\u1ecb hao h\u1ee5t hi\u1ec7u n\u0103ng kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n

\"CNAME<\/p>\n

C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng CNAME<\/h3>\n

S\u1eed d\u1ee5ng b\u1ea3n ghi CNAME c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng v\u00e0 l\u1ee3i \u00edch. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 l\u00fd do t\u1ea1i sao n\u00ean s\u1eed d\u1ee5ng CNAME:<\/p>\n

– \u0110i\u1ec1u h\u01b0\u1edbng d\u1ec5 d\u00e0ng:<\/strong> CNAME cho ph\u00e9p b\u1ea1n d\u1ec5 d\u00e0ng \u0111i\u1ec1u h\u01b0\u1edbng t\u1eeb m\u1ed9t t\u00ean mi\u1ec1n ho\u1eb7c t\u00ean mi\u1ec1n con t\u1edbi m\u1ed9t t\u00ean mi\u1ec1n ho\u1eb7c t\u00ean mi\u1ec1n con kh\u00e1c m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i \u0111\u1ecba ch\u1ec9 IP. \u0110i\u1ec1u n\u00e0y h\u1eefu \u00edch khi b\u1ea1n mu\u1ed1n thay \u0111\u1ed5i t\u00e0i nguy\u00ean m\u00e0 t\u00ean mi\u1ec1n ho\u1eb7c t\u00ean mi\u1ec1n con tr\u1ecf \u0111\u1ebfn m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i c\u00e0i \u0111\u1eb7t DNS.<\/p>\n

– T\u1ea1o li\u00ean k\u1ebft gi\u1eefa t\u00ean mi\u1ec1n<\/strong>: B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng CNAME \u0111\u1ec3 t\u1ea1o li\u00ean k\u1ebft gi\u1eefa c\u00e1c t\u00ean mi\u1ec1n kh\u00e1c nhau. V\u00ed d\u1ee5, b\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng CNAME \u0111\u1ec3 tr\u1ecf t\u1eeb m\u1ed9t t\u00ean mi\u1ec1n con c\u1ee7a t\u00ean mi\u1ec1n ch\u00ednh t\u1edbi m\u1ed9t trang web, d\u1ecbch v\u1ee5 ho\u1eb7c t\u00e0i nguy\u00ean kh\u00e1c tr\u00ean m\u1ea1ng.<\/p>\n

– T\u1ea1o t\u00ean mi\u1ec1n con th\u01b0\u1eddng xuy\u00ean<\/strong>: N\u1ebfu b\u1ea1n c\u1ea7n t\u1ea1o nhi\u1ec1u t\u00ean mi\u1ec1n con (subdomain) c\u00f3 c\u1ea5u h\u00ecnh gi\u1ed1ng nhau, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng CNAME \u0111\u1ec3 tr\u1ecf t\u1ea5t c\u1ea3 ch\u00fang v\u1ec1 m\u1ed9t t\u00ean mi\u1ec1n ch\u00ednh. \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n qu\u1ea3n l\u00fd v\u00e0 c\u1eadp nh\u1eadt ch\u1ec9 m\u1ed9t b\u1ea3n ghi thay v\u00ec nhi\u1ec1u b\u1ea3n ghi A ho\u1eb7c AAAA.<\/p>\n

– Qu\u1ea3n l\u00fd thay \u0111\u1ed5i \u0111\u1ecba ch\u1ec9 IP<\/strong>: N\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef ho\u1eb7c m\u00e1y ch\u1ee7 m\u00e0 \u0111\u1ecba ch\u1ec9 IP th\u01b0\u1eddng xuy\u00ean thay \u0111\u1ed5i, s\u1eed d\u1ee5ng CNAME s\u1ebd gi\u00fap b\u1ea1n thay \u0111\u1ed5i ch\u1ec9 m\u1ed9t b\u1ea3n ghi thay v\u00ec ph\u1ea3i c\u1eadp nh\u1eadt nhi\u1ec1u b\u1ea3n ghi A.<\/p>\n

– D\u1ec5 d\u00e0ng c\u1ea5u h\u00ecnh CDN<\/strong>: CNAME c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 li\u00ean k\u1ebft t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n v\u1edbi d\u1ecbch v\u1ee5 CDN (Content Delivery Network), gi\u00fap c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 truy c\u1eadp trang web b\u1eb1ng c\u00e1ch \u0111\u1ecbnh tuy\u1ebfn n\u1ed9i dung g\u1ea7n h\u01a1n \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng.<\/p>\n

Tuy nhi\u00ean, c\u0169ng c\u1ea7n l\u01b0u \u00fd r\u1eb1ng vi\u1ec7c s\u1eed d\u1ee5ng CNAME c\u0169ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t truy c\u1eadp trang web n\u1ebfu kh\u00f4ng c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch, do t\u0103ng th\u00eam m\u1ed9t b\u01b0\u1edbc truy v\u1ea5n DNS. N\u00ean xem x\u00e9t c\u1ea9n th\u1eadn khi \u00e1p d\u1ee5ng CNAME \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c ti\u00eau c\u1ee7a b\u1ea1n v\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t ho\u1eb7c b\u1ea3o m\u1eadt.<\/p>\n

\"CNAME<\/p>\n

C\u00e1ch t\u1ea1o, ch\u1ec9nh s\u1eeda, v\u00e0 x\u00f3a CNAME<\/h3>\n

B\u1ea1n c\u1ea7n c\u00f3 m\u1ed9t b\u1ea3n ghi A khi mu\u1ed1n thi\u1ebft l\u1eadp Cname. Khi th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y, t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c khai b\u00e1o ch\u00ednh x\u00e1c trong b\u1ea3n ghi CNAME s\u1ebd tr\u1ecf \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Canonical Domain. C\u00e1c t\u00ean mi\u1ec1n kh\u00e1c mu\u1ed1n tr\u1ecf v\u1ec1 c\u00f9ng m\u00e1y ch\u1ee7 n\u00e0y s\u1ebd l\u00e0 Alias Domain v\u00e0 c\u0169ng c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c khai b\u00e1o.<\/p>\n

\u0110\u1ec3 t\u1ea1o CNAME cho t\u00ean mi\u1ec1n con, b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m theo c\u00e1c b\u01b0\u1edbc sau:<\/strong><\/p>\n

– \u0110\u0103ng nh\u1eadp v\u00e0o ph\u1ea7n \u0111i\u1ec1u khi\u1ec3n DNS.<\/p>\n

– Ch\u1ecdn t\u00ean mi\u1ec1n \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o h\u1ec7 th\u1ed1ng.<\/p>\n

– M\u00e0n h\u00ecnh s\u1ebd hi\u1ec3n th\u1ecb th\u00f4ng tin li\u00ean quan \u0111\u1ebfn t\u00ean mi\u1ec1n.<\/p>\n

– Nh\u1eadp c\u00e1c gi\u00e1 tr\u1ecb c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o b\u1ea3n ghi CNAME cho t\u00ean mi\u1ec1n con, c\u1ee5 th\u1ec3:<\/p>\n

+ Lo\u1ea1i b\u1ea3n ghi DNS: CNAME.<\/p>\n

+ T\u00ean: Gi\u00e1 tr\u1ecb t\u00ean c\u1ee7a t\u00ean mi\u1ec1n con.<\/p>\n

+ Gi\u00e1 tr\u1ecb: Gi\u00e1 tr\u1ecb c\u1ee7a CNAME (ch\u1ec9 nh\u1eadp t\u00ean mi\u1ec1n \u0111\u00e3 x\u00e1c \u0111\u1ecbnh, kh\u00f4ng s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 IP).<\/p>\n

+ MX: \u0110\u1ec3 tr\u1ed1ng.<\/p>\n

– Ti\u1ebfn h\u00e0nh nh\u1eadp c\u00e1c gi\u00e1 tr\u1ecb c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o b\u1ea3n ghi Cname cho c\u00e1c Subdomain.<\/p>\n

T\u1ea1o b\u1ea3n ghi CNAME \u0111\u1ec3 x\u00e1c th\u1ef1c c\u00e1c d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn<\/strong><\/p>\n

– \u0110\u0103ng nh\u1eadp v\u00e0o ph\u1ea7n \u0111i\u1ec1u khi\u1ec3n DNS.<\/p>\n

– Ch\u1ecdn t\u00ean mi\u1ec1n \u0111\u00e3 th\u00eam v\u00e0o h\u1ec7 th\u1ed1ng.<\/p>\n

– M\u00e0n h\u00ecnh s\u1ebd hi\u1ec3n th\u1ecb th\u00f4ng tin.<\/p>\n

– Nh\u1eadp th\u00f4ng tin c\u1ea7n thi\u1ebft v\u00e0o m\u00e0n h\u00ecnh.<\/p>\n

Th\u00eam, nh\u1eadp th\u00f4ng tin, c\u1eadp nh\u1eadt v\u00e0 x\u00f3a b\u1ea3n ghi CNAME<\/strong><\/p>\n

– Th\u00eam b\u1ea3n ghi CNAME<\/p>\n

+ M\u1edf giao di\u1ec7n ch\u1ec9nh s\u1eeda b\u1ea3n ghi CNAME.<\/p>\n

+ Nh\u1ea5p v\u00e0o t\u00f9y ch\u1ecdn “Th\u00eam”.<\/p>\n

+ Ch\u1ecdn lo\u1ea1i b\u1ea3n ghi CNAME \u0111\u1ec3 th\u00eam b\u1ea3n ghi m\u1edbi.<\/p>\n

+ Nh\u1eadp th\u00f4ng tin b\u1ea3n ghi Cname, bao g\u1ed3m:<\/p>\n

T\u00ean: T\u00ean mi\u1ec1n b\u1ea1n mu\u1ed1n th\u00eam.<\/p>\n

Gi\u00e1 tr\u1ecb: T\u00ean m\u00e1y ch\u1ee7 m\u00e0 n\u00f3 tr\u1ecf t\u1edbi (kh\u00f4ng ph\u1ea3i URL).<\/p>\n

+ Nh\u1eadp \u0111\u1ea7y \u0111\u1ee7 th\u00f4ng tin c\u1ea7n thi\u1ebft cho b\u1ea3n ghi CNAME.<\/p>\n

– C\u1eadp nh\u1eadt b\u1ea3n ghi CNAME<\/p>\n

+ Trong giao di\u1ec7n ch\u1ec9nh s\u1eeda b\u1ea3n ghi CNAME, t\u00ecm b\u1ea3n ghi c\u1ea7n s\u1eeda.<\/p>\n

+ Nh\u1ea5p v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng b\u00fat ch\u00ec \u0111\u1ec3 ch\u1ec9nh s\u1eeda.<\/p>\n

+ C\u1eadp nh\u1eadt th\u00f4ng tin c\u1ea7n thi\u1ebft.<\/p>\n

+ Nh\u1ea5p v\u00e0o “C\u1eadp nh\u1eadt b\u1ea3n ghi” \u0111\u1ec3 l\u01b0u thay \u0111\u1ed5i.<\/p>\n

– X\u00f3a b\u1ea3n ghi CNAME<\/p>\n

+ Trong giao di\u1ec7n ch\u1ec9nh s\u1eeda b\u1ea3n ghi, t\u00ecm b\u1ea3n ghi CNAME m\u00e0 b\u1ea1n mu\u1ed1n x\u00f3a.<\/p>\n

+ Nh\u1ea5p v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng th\u00f9ng r\u00e1c \u0111\u1ec3 x\u00e1c nh\u1eadn vi\u1ec7c x\u00f3a b\u1ea3n ghi.<\/p>\n

+ H\u00e3y t\u00ecm b\u1ea3n ghi CNAME m\u00e0 b\u1ea1n mu\u1ed1n x\u00f3a v\u00e0 nh\u1ea5p v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng th\u00f9ng r\u00e1c \u0111\u1ec3 th\u1ef1c hi\u1ec7n x\u00f3a.<\/p>\n

T\u00ean mi\u1ec1n .VN ch\u1ec9 t\u1eeb 20K | T\u00ean mi\u1ec1n qu\u1ed1c t\u1ebf ch\u1ec9 t\u1eeb 25K<\/cite><\/strong><\/span><\/p>\n
\u01afu \u0111\u00e3i C\u1ef0C KH\u1ee6NG khi \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n t\u1ea1i Tenten.vn:<\/p>\n