{"id":1009,"date":"2025-02-07T21:06:01","date_gmt":"2025-02-07T14:06:01","guid":{"rendered":"https:\/\/cuongnguyen.io.vn\/?p=1009"},"modified":"2025-02-07T21:06:01","modified_gmt":"2025-02-07T14:06:01","slug":"cach-dang-ky-va-cau-hinh-dns-cho-ten-mien-tren-cloudflare","status":"publish","type":"post","link":"https:\/\/cuongnguyen.bat.io.vn\/index.php\/2025\/02\/07\/cach-dang-ky-va-cau-hinh-dns-cho-ten-mien-tren-cloudflare\/","title":{"rendered":"C\u00c1CH \u0110\u0102NG K\u00dd V\u00c0 C\u1ea4U H\u00ccNH DNS CHO T\u00caN MI\u1ec0N TR\u00caN CLOUDFLARE"},"content":{"rendered":"

B\u1ea1n \u0111ang \u0111au \u0111\u1ea7u khi\u00a0s\u1eeda \u0111\u1ed5i DNS record<\/strong>\u00a0nh\u01b0ng ph\u1ea3i ch\u1edd \u0111\u1ee3i d\u00e0i c\u1ed5 \u0111\u1ec3 ch\u00fang kh\u00f4ng update, ho\u1eb7c r\u1ea5t nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p\u00a0\u0111\u1ed5i host\u00a0th\u00ec kh\u00f4ng ch\u1ecbu nh\u1eadn IP c\u1ee7a host m\u1edbi<\/strong>\u00a0m\u00e0 c\u1ee9 nh\u1eadn IP host c\u0169 ho\u1eb7c ch\u1eadp ch\u1eddn gi\u1eefa IP c\u0169 v\u00e0 m\u1edbi?!<\/p>\n

H\u00e3y d\u00f9ng Cloudflare c\u00e0ng s\u1edbm c\u00e0ng t\u1ed1t \u0111\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 vi\u1ec7c tr\u00ean.<\/p>\n

Cloudflare<\/strong>\u00a0l\u00e0 d\u1ecbch v\u1ee5 mi\u1ec5n ph\u00ed v\u00e0 c\u00f3 l\u1ee3i \u00edch v\u00f4 c\u00f9ng to l\u1edbn \u0111\u1ed1i v\u1edbi nh\u1eefng ai s\u1edf h\u1eefu website m\u00e0 t\u00f4i khuy\u00ean m\u1ecdi website n\u00ean s\u1eed d\u1ee5ng.<\/p>\n

Khi b\u1ea1n s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 DNS trung gian t\u1ea1i Cloudflare gi\u00fap t\u0103ng t\u1ed1c qu\u00e1 tr\u00ecnh ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n, nhanh ch\u00f3ng nh\u1eadn IP m\u1edbi n\u1ebfu b\u1ea1n \u0111\u1ed5i hosting, VPS trong 1 v\u00e0i gi\u00e2y m\u00e0 kh\u00f4ng ph\u1ea3i ng\u1ed3i ch\u1edd d\u00e0i c\u1ed5 \u0111\u1ec3 Nameserver \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt, ngo\u00e0i ra Cloudflare c\u00f2n b\u1ea3o v\u1ec7 website c\u1ee7a b\u1ea1n tr\u01b0\u1edbc c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng, gi\u00fap\u00a0t\u0103ng t\u1ed1c website\u00a0c\u1ee7a b\u1ea1n khi s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi Cloudflare.<\/p>\n

Trong b\u00e0i vi\u1ebft n\u00e0y c\u00f9ng V\u0169 Tr\u1ee5 S\u1ed1 t\u00ecm hi\u1ec3u v\u1ec1 Cloudflare v\u00e0 c\u00e1ch \u0111\u1ec3 \u0111\u0103ng k\u00fd t\u00e0i kho\u1ea3n v\u00e0 c\u1eadp nh\u1eadt Nameserver sang nh\u00e0 cung c\u1ea5p DNS trung gian tuy\u1ec7t v\u1eddi n\u00e0y nh\u00e9.<\/p>\n

CloudFlare l\u00e0 g\u00ec?<\/h2>\n

CloudFlare l\u00e0 m\u1ed9t d\u1ecbch v\u1ee5 DNS (Domain Name Server) trung gian<\/strong>, t\u1ee9c l\u00e0 thay v\u00ec t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n k\u1ebft n\u1ed1i \u0111\u1ebfn m\u00e1y ch\u1ee7 b\u1eb1ng \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7, th\u00ec CloudFlare s\u1ebd l\u00e0m nhi\u1ec7m v\u1ee5 k\u1ebft n\u1ed1i trung gian. L\u00fac n\u00e0y m\u1ed7i l\u01b0\u1ee3t truy c\u1eadp s\u1ebd \u0111\u01b0\u1ee3c x\u1eed l\u00fd th\u00f4ng qua CloudFlare tr\u01b0\u1edbc khi \u0111\u1ebfn m\u00e1y ch\u1ee7.<\/p>\n

B\u1ea3n th\u00e2n m\u00ecnh \u0111\u1ed5i t\u1ea5t c\u1ea3 Nameserver \u1edf t\u1ea5t c\u1ea3 c\u00e1c nh\u00e0 cung c\u1ea5p m\u00ecnh mua v\u1ec1 1 t\u00e0i kho\u1ea3n Cloudflare \u0111\u1ec3 d\u1ec5 qu\u1ea3n l\u00fd c\u00e1c b\u1ea3ng ghi. \u0110\u00e2y l\u00e0 l\u1ee3i \u00edch to l\u1edbn nh\u1ea5t m\u00e0 m\u00ecnh s\u1eed d\u1ee5ng Cloudflare, thay v\u00ec m\u1ed7i l\u1ea7n thay \u0111\u1ed5i, c\u1eadp nh\u1eadt c\u00e1c b\u1ea3ng ghi b\u1ea1n ph\u1ea3i \u0111\u0103ng nh\u1eadp v\u00e0o nh\u00e0 cung c\u1ea5p t\u00ean mi\u1ec1n \u0111\u1ec3 thay \u0111\u1ed5i th\u00ec b\u1ea1n ch\u1ec9 c\u1ea7n \u0111\u0103ng nh\u1eadp v\u00e0o 1 t\u00e0i kho\u1ea3n Cloudflare \u0111\u1ec3 thay \u0111\u1ed5i! (Ch\u1ec9 \u0111\u1ebfn khi n\u00e0o t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n h\u1ebft h\u1ea1n th\u00ec b\u1ea1n m\u1edbi \u0111\u0103ng nh\u1eadp v\u00e0o nh\u00e0 cung c\u1ea5p\u00a0t\u00ean mi\u1ec1n \u0111\u1ec3 gia h\u1ea1n m\u00e0 th\u00f4i)<\/p>\n

L\u1ee3i \u00edch khi b\u1eadt Proxy tr\u00ean Cloudflare<\/h3>\n
    \n
  1. Ti\u1ebft ki\u1ec7m b\u0103ng th\u00f4ng tr\u00ean host: Ng\u01b0\u1eddi d\u00f9ng s\u1ebd ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c b\u0103ng th\u00f4ng cho m\u00e1y ch\u1ee7 v\u00ec s\u1eed d\u1ee5ng Cloudflare s\u1ebd h\u1ea1n ch\u1ebf vi\u1ec7c truy c\u1eadp tr\u1ef1c ti\u1ebfp qua m\u00e1y ch\u1ee7. K\u1ebft qu\u1ea3 l\u00e0 b\u0103ng th\u00f4ng s\u1ebd gi\u1ea3m h\u1eb3n, ch\u1ec9 c\u00f2n \u00bd \u0111\u1ebfn 1\/3 so v\u1edbi tr\u01b0\u1edbc \u0111\u00e2y.<\/li>\n
  2. T\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp website: Cloudflare s\u1ebd l\u01b0u b\u1ea3n nh\u1edb \u0111\u1ec3 c\u1ee7a website tr\u00ean m\u00e1y ch\u1ee7 c\u1ee7a CDN. Ti\u1ebfp \u0111\u1ebfn s\u1ebd ph\u00e2n ph\u1ed1i cho nh\u1eefng ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp website g\u1ea7n m\u00e1y ch\u1ee7 \u0111\u00f3 nh\u1ea5t. B\u00ean c\u1ea1nh \u0111\u00f3, nh\u1eefng d\u1eef li\u1ec7u t\u0129nh kh\u00e1c nh\u01b0 h\u00ecnh \u1ea3nh, CSS, c\u00e1c t\u1eadp tin\u2026c\u0169ng \u0111\u01b0\u1ee3c CloudFlare n\u00e9n zip gi\u00fap t\u1ed1c \u0111\u1ed9 t\u1ea3i nhanh h\u01a1n.<\/li>\n
  3. T\u0103ng b\u1ea3o m\u1eadt website: L\u00fd do quan tr\u1ecdng gi\u00fap khi\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi l\u1ef1a ch\u1ecdn Cloudflare l\u00e0 t\u0103ng t\u00ednh b\u1ea3o m\u1eadt website, h\u1ea1n ch\u1ebf s\u1ef1 t\u1ea5n c\u00f4ng c\u1ee7a DDoS, spam b\u00ecnh lu\u1eadn v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c t\u1ea5n c\u00f4ng c\u01a1 b\u1ea3n kh\u00e1c. V\u00ec c\u00e1c l\u01b0\u1ee3t truy c\u1eadp ph\u1ea3i th\u00f4ng qua m\u00e1y ch\u1ee7 Cloudflare n\u00ean t\u1ea1i c\u00e1c m\u00e1y ch\u1ee7 CDN c\u00f3 th\u1ec3 s\u00e0ng l\u1ecdc l\u01b0\u1ee3t truy c\u1eadp v\u00e0 ph\u00e2n lo\u1ea1i c\u00e1c l\u01b0\u1ee3t truy c\u1eadp c\u00f3 \u0111\u1ecba ch\u1ec9 TP x\u1ea5u, nguy hi\u1ec3m cho m\u00e1y t\u00ednh.<\/li>\n
  4. S\u1eed d\u1ee5ng SSL mi\u1ec5n ph\u00ed: \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng t\u00ednh n\u0103ng gi\u00fap b\u1ea1n c\u00e0i \u0111\u1eb7t SSL cho website \u0111\u01a1n gi\u1ea3n.<\/li>\n
  5. H\u1ea1n ch\u1ebf c\u00e1c l\u01b0\u1ee3t truy c\u1eadp \u0111\u1ebfn t\u1eeb c\u00e1c qu\u1ed1c gia ch\u1ec9 \u0111\u1ecbnh.<\/li>\n
  6. C\u1ea5m truy c\u1eadp v\u1edbi m\u1ed9t s\u1ed1 IP nh\u1ea5t \u0111\u1ecbnh.<\/li>\n
  7. C\u00f4ng ngh\u1ec7 t\u01b0\u1eddng l\u1eeda WAF \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c ph\u01b0\u01a1ng th\u1ee9c t\u1ea5n c\u00f4ng SQL Injection, Cross-Site Request Forgery (CSRF), Cross-site Scripting (XSS) v\u00e0 m\u1ed9t s\u1ed1 th\u1ee7 thu\u1eadt khai th\u00e1c l\u1ed7 h\u1ed5ng tr\u00ean website.<\/li>\n<\/ol>\n

    \u0110i\u1ec3m tr\u1eeb khi b\u1eadt Proxy tr\u00ean Cloudflare<\/h3>\n

    Theo m\u00ecnh s\u1eed d\u1ee5ng Proxy tr\u00ean Cloudflare cho c\u00e1c m\u1ee5c \u0111\u00edch t\u0103ng t\u1ed1c cho ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c server \u1edf Vi\u1ec7t Nam l\u00e0 ho\u00e0n to\u00e0n v\u00f4 ngh\u0129a, s\u1eed d\u1ee5ng Cloudflare, \u0111\u1eb7c bi\u1ec7t trong l\u00fac \u0111\u1ee9t c\u00e1p quang ch\u1ec9 l\u00e0m cho t\u00ecnh h\u00ecnh ng\u00e0y c\u00e0ng t\u1ed3i t\u1ec7 th\u00eam ho\u1eb7c khi check website v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 Google PageSpeed Insights s\u1ebd b\u1ecb b\u00e1o l\u1ed7i ph\u1ea3n h\u1ed3i ch\u1eadm t\u1eeb server l\u00e0m gi\u1ea3m \u0111i\u1ec3m s\u1ed1 kh\u00e1 nhi\u1ec1u.<\/p>\n

    Th\u1ec9nh tho\u1ea3ng b\u1ea1n c\u00f3 th\u1ec3 s\u1ebd g\u1eb7p l\u1ed7i khi truy c\u1eadp v\u00e0o blog\/ website m\u00e0 theo CloudFlare th\u00f4ng b\u00e1o l\u00e0 do host ch\u1ebft. Th\u1ef1c t\u1ebf th\u00ec nguy\u00ean nh\u00e2n c\u1ee7a vi\u1ec7c n\u00e0y l\u00e0 do gi\u1eefa host v\u00e0 CloudFlare t\u1ea1o qu\u00e1 nhi\u1ec1u k\u1ebft n\u1ed1i d\u1eabn \u0111\u1ebfn qu\u00e1 t\u1ea3i v\u00e0 b\u1ecb l\u1ed7i. Tuy nhi\u00ean, hi\u1ec7n nay t\u00ecnh tr\u1ea1ng n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c r\u1ea5t nhi\u1ec1u v\u00e0 b\u1ea1n h\u1ea7u nh\u01b0 kh\u00f4ng c\u1ea7n b\u1eadn t\u00e2m \u0111\u1ebfn ch\u00fang n\u1eefa.<\/p>\n

    B\u1ea3n th\u00e2n m\u00ecnh s\u1eed d\u1ee5ng Cloudflare l\u00e0m DNS trung gian m\u00e0 th\u00f4i! T\u1ea5t nhi\u00ean t\u00f9y v\u00e0o tr\u01b0\u1eddng h\u1ee3p m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn ch\u1ee9 kh\u00f4ng n\u00ean c\u1ee9ng nh\u1eafc vi\u1ec7c b\u1eadt t\u1eaft Proxy tr\u00ean Cloudflare.<\/p><\/blockquote>\n

    \u0110\u0103ng k\u00fd t\u00e0i kho\u1ea3n Cloudflare<\/h2>\n

    \u0110i\u1ec3m qua m\u1ed9t s\u1ed1 \u0111i\u1ec3m c\u1ed9ng v\u00e0 \u0111i\u1ec3m tr\u1eeb khi s\u1eed d\u1ee5ng Cloudflare \u1edf tr\u00ean th\u00ec m\u00ecnh v\u1eabn khuy\u00ean b\u1ea1n n\u00ean \u0111\u0103ng k\u00fd v\u00e0 s\u1eed d\u1ee5ng Cloudflare. C\u00e1c b\u01b0\u1edbc \u0111\u0103ng k\u00fd Cloudflare c\u1ef1c k\u1ef3 \u0111\u01a1n gi\u1ea3n m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 thao t\u00e1c nh\u01b0 sau:<\/p>\n

    1. Truy c\u1eadp v\u00e0o\u00a0Cloudflare<\/a>
    \n2. Ti\u1ebfp \u0111\u00f3 click v\u00e0o\u00a0Sign Up<\/strong>\u00a0nh\u01b0 h\u00ecnh ph\u00eda d\u01b0\u1edbi<\/p>\n

    \"\u0110\u0103ng<\/a><\/p>\n

    \u0110\u0103ng k\u00fd t\u00e0i kho\u1ea3n Cloudflare<\/p>\n<\/div>\n

    3. \u0110i\u1ec1n email v\u00e0 m\u1eadt kh\u1ea9u v\u00e0o form \u0111\u0103ng k\u00fd<\/p>\n

    \"\u0110i\u1ec1n<\/a><\/p>\n

    4. Nh\u1eadp t\u00ean mi\u1ec1n b\u1ea1n mu\u1ed1n th\u00eam v\u00e0o t\u00e0i kho\u1ea3n Cloudflare sau \u0111\u00f3 nh\u1ea5n v\u00e0o Add site<\/p>\n

    \"th\u00eam<\/a><\/p>\n

    5. Ch\u1ecdn g\u00f3i $0 tr\u00ean Cloudflare v\u00e0 nh\u1ea5n\u00a0Continue<\/strong><\/p>\n

    \"ch\u1ecdn<\/a><\/p>\n

    6. Ch\u1edd \u0111\u1ee3i v\u00e0i ph\u00fat \u0111\u1ec3 Cloudflare qu\u00e9t c\u00e1c b\u1ea3n ghi hi\u1ec7n c\u00f3 c\u1ee7a website c\u1ee7a b\u1ea1n.<\/p>\n

    \"cloudflare<\/a><\/p>\n

    \"ti\u1ebfp<\/a><\/p>\n

    Nh\u1ea5n Continue \u0111\u1ec3 ti\u1ebfp t\u1ee5c<\/p>\n<\/div>\n

    6. T\u1edbi b\u01b0\u1edbc quan tr\u1ecdng, b\u1ea1n h\u00e3y \u0111\u0103ng nh\u1eadp v\u00e0o t\u00e0i kho\u1ea3n qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n c\u1ee7a m\u00ecnh v\u00e0 thay \u0111\u1ed5i DNS 2 Cloudflare\u2019s nameservers \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi Cloudflare<\/p>\n

    \"thay<\/a><\/p>\n

    Thay \u0111\u1ed5i DNS sang Cloudflare<\/h2>\n

    Chi ti\u1ebft vi\u1ec7c c\u1eadp nh\u1eadt Nameserver b\u1ea1n l\u00e0m theo v\u00e0i b\u01b0\u1edbc sau (m\u00ecnh demo \u1edf t\u00e0i kho\u1ea3n qu\u1ea3n tr\u1ecb t\u00ean mi\u1ec1n t\u1ea1i INET)<\/p>\n

    \"thay<\/a><\/p>\n

    \"c\u1eadp<\/a><\/p>\n

    C\u1eadp nh\u1eadt dns tr\u00ean ph\u1ea7n qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n inet<\/p>\n<\/div>\n

    Sau khi thay \u0111\u1ed5i 2 nameserver do Cloudflare cung c\u1ea5p b\u1ea1n ti\u1ebfp t\u1ee5c thao t\u00e1c \u1edf ph\u1ea7n Cloudflare<\/p>\n

    \"ho\u00e0n<\/a><\/p>\n

    V\u1eady l\u00e0 xong vi\u1ec7c \u0111\u1ed5i Nameserver sang Cloudflare, gi\u1edd b\u1ea1n h\u00e3y ch\u1edd \u0111\u1ee3i v\u00e0i ph\u00fat s\u1ebd c\u00f3 th\u00f4ng b\u00e1o vi\u1ec7c c\u1eadp nh\u1eadt DNS ho\u00e0n th\u00e0nh v\u1ec1 email c\u1ee7a m\u00ecnh ho\u1eb7c v\u00e0o Cloudflare c\u00f3 th\u00f4ng b\u00e1o nh\u01b0 h\u00ecnh ph\u00eda d\u01b0\u1edbi.<\/p>\n

    \"c\u1eadp<\/a><\/p>\n

    Thay \u0111\u1ed5i, th\u00eam b\u1ea3ng ghi tr\u00ean Cloudflare<\/h2>\n

    Sau khi ho\u00e0n t\u1ea5t, b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u th\u00eam \u1edf b\u1ea3ng qu\u1ea3n tr\u1ecb Cloudflare r\u1ea5t th\u00e2n thi\u1ec7n v\u00e0 d\u1ec5 s\u1eed d\u1ee5ng, b\u1ea1n c\u00f3 th\u1ec3 th\u00eam b\u1ea3ng ghi cho t\u00ean mi\u1ec1n b\u1eb1ng c\u00e1ch click v\u00e0o tab DNS v\u00e0 th\u00eam c\u00e1c b\u1ea3ng ghi t\u00f9y \u00fd.<\/p>\n

    Th\u00f4ng th\u01b0\u1eddng, thay \u0111\u1ed5i Nameserver v\u1ec1 Cloudflare b\u1ea1n s\u1ebd c\u1eadp nh\u1eadt b\u1ea3ng ghi A \u0111\u1ec3 k\u1ebft n\u1ed1i gi\u1eefa t\u00ean mi\u1ec1n v\u00e0 hosting c\u1ee7a b\u1ea1n.<\/p>\n

    \"b\u1eadt<\/a><\/p>\n

    1 website th\u00f4ng th\u01b0\u1eddng b\u1ea1n n\u00ean th\u00eam 2 b\u1ea3ng ghi:<\/p>\n