{"id":30,"date":"2026-03-24T03:57:02","date_gmt":"2026-03-23T20:57:02","guid":{"rendered":"https:\/\/ivi.vn\/blog\/huong-dan-tro-ten-mien\/"},"modified":"2026-08-24T18:43:58","modified_gmt":"2026-08-24T11:43:58","slug":"huong-dan-tro-ten-mien","status":"publish","type":"post","link":"https:\/\/ivi.vn\/blog\/huong-dan-tro-ten-mien\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch tr\u1ecf t\u00ean mi\u1ec1n v\u1ec1 Landing Page"},"content":{"rendered":"<p>B\u1ea1n \u0111\u00e3 b\u1ea5m \u0111\u00fang n\u00fat, b\u1ea3n ghi \u0111\u00e3 hi\u1ec7n trong b\u1ea3ng qu\u1ea3n l\u00fd, m\u00e0 m\u1edf t\u00ean mi\u1ec1n l\u00ean v\u1eabn ra trang c\u0169 ho\u1eb7c l\u1ed7i &#8220;kh\u00f4ng t\u00ecm th\u1ea5y m\u00e1y ch\u1ee7&#8221;. Ch\u00edn tr\u00ean m\u01b0\u1eddi tr\u01b0\u1eddng h\u1ee3p nh\u01b0 v\u1eady kh\u00f4ng ph\u1ea3i do landing page h\u1ecfng, m\u00e0 do m\u1ed9t trong b\u1ed1n th\u1ee9 \u1edf t\u1ea7ng DNS: sai nameserver, sai lo\u1ea1i b\u1ea3n ghi, c\u00f2n b\u1ea3n ghi c\u0169 ch\u1ed3ng l\u00ean, ho\u1eb7c \u0111\u01a1n gi\u1ea3n l\u00e0 ch\u01b0a h\u1ebft th\u1eddi gian l\u01b0u \u0111\u1ec7m.<\/p>\n<p>B\u00e0i n\u00e0y gi\u1ea3i th\u00edch c\u01a1 ch\u1ebf b\u00ean d\u01b0\u1edbi \u0111\u1ec3 b\u1ea1n t\u1ef1 ch\u1ea9n \u0111o\u00e1n \u0111\u01b0\u1ee3c, thay v\u00ec th\u1eed ng\u1eabu nhi\u00ean r\u1ed3i ch\u1edd. Ph\u1ea7n thao t\u00e1c c\u1ee5 th\u1ec3 trong dashboard ivi.vn n\u1eb1m \u1edf <a href=\"https:\/\/ivi.vn\/docs#bai-4-huong-dan-tro-ten-mien-landing-page\">B\u00e0i 4 c\u1ee7a lo\u1ea1t h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng<\/a>; \u1edf \u0111\u00e2y ta n\u00f3i v\u1ec1 ph\u1ea7n b\u00ean d\u01b0\u1edbi c\u00e1i n\u00fat \u0111\u00f3.<\/p>\n<h2>Chuy\u1ec7n g\u00ec x\u1ea3y ra tr\u01b0\u1edbc khi trang hi\u1ec7n ra<\/h2>\n<p>Khi ai \u0111\u00f3 g\u00f5 t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n, tr\u00ecnh duy\u1ec7t kh\u00f4ng bi\u1ebft m\u00e1y ch\u1ee7 n\u00e0o gi\u1eef n\u1ed9i dung. N\u00f3 h\u1ecfi m\u1ed9t m\u00e1y ch\u1ee7 ph\u00e2n gi\u1ea3i, th\u01b0\u1eddng l\u00e0 c\u1ee7a nh\u00e0 m\u1ea1ng, v\u00e0 m\u00e1y ch\u1ee7 \u0111\u00f3 \u0111i h\u1ecfi l\u1ea7n l\u01b0\u1ee3t:<\/p>\n<ol>\n<li>H\u1ecfi nh\u00f3m m\u00e1y ch\u1ee7 g\u1ed1c: ai qu\u1ea3n \u0111u\u00f4i <code>.com<\/code> (ho\u1eb7c <code>.vn<\/code>)?<\/li>\n<li>H\u1ecfi m\u00e1y ch\u1ee7 c\u1ee7a \u0111u\u00f4i \u0111\u00f3: t\u00ean mi\u1ec1n n\u00e0y giao cho nameserver n\u00e0o?<\/li>\n<li>H\u1ecfi ch\u00ednh nameserver \u0111\u00f3: b\u1ea3n ghi cho t\u00ean n\u00e0y l\u00e0 g\u00ec?<\/li>\n<\/ol>\n<p>Ch\u1ec9 c\u00e2u tr\u1ea3 l\u1eddi \u1edf b\u01b0\u1edbc ba m\u1edbi l\u00e0 th\u1ee9 b\u1ea1n s\u1eeda \u0111\u01b0\u1ee3c trong b\u1ea3ng qu\u1ea3n l\u00fd DNS. V\u00e0 n\u00f3 ch\u1ec9 \u0111\u01b0\u1ee3c h\u1ecfi t\u1edbi n\u1ebfu b\u01b0\u1edbc hai ch\u1ec9 \u0111\u00fang v\u1ec1 m\u00e1y ch\u1ee7 b\u1ea1n \u0111ang s\u1eeda. \u0110\u00e2y l\u00e0 ngu\u1ed3n g\u1ed1c c\u1ee7a l\u1ed7i ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/p>\n<h2>Nameserver quy\u1ebft \u0111\u1ecbnh ai \u0111\u01b0\u1ee3c ph\u00e9p tr\u1ea3 l\u1eddi<\/h2>\n<p>M\u1ed9t t\u00ean mi\u1ec1n c\u00f3 th\u1ec3 c\u00f3 b\u1ea3n ghi \u1edf nhi\u1ec1u n\u01a1i c\u00f9ng l\u00fac: \u1edf nh\u00e0 \u0111\u0103ng k\u00fd, \u1edf m\u1ed9t nh\u00e0 cung c\u1ea5p DNS c\u0169, \u1edf h\u1ec7 th\u1ed1ng c\u1ee7a ivi.vn. Nh\u01b0ng ch\u1ec9 n\u01a1i \u0111\u01b0\u1ee3c nameserver ch\u1ec9 \u0111\u1ebfn m\u1edbi th\u1eadt s\u1ef1 ph\u00e1t ra c\u00e2u tr\u1ea3 l\u1eddi. M\u1ecdi b\u1ea3n ghi b\u1ea1n s\u1eeda \u1edf nh\u1eefng n\u01a1i c\u00f2n l\u1ea1i \u0111\u1ec1u n\u1eb1m im, kh\u00f4ng ai h\u1ecfi t\u1edbi.<\/p>\n<p>V\u00ec v\u1eady m\u00e0n qu\u1ea3n l\u00fd t\u00ean mi\u1ec1n c\u1ee7a ivi.vn c\u00f3 m\u1ed9t c\u1ea3nh b\u00e1o ri\u00eang: khi ph\u00e1t hi\u1ec7n nameserver \u0111ang tr\u1ecf v\u1ec1 n\u01a1i kh\u00e1c, n\u00f3 n\u00f3i th\u1eb3ng r\u1eb1ng b\u1ea3n ghi s\u1eeda \u1edf \u0111\u00e2y ch\u01b0a c\u00f3 t\u00e1c d\u1ee5ng tr\u00ean Internet, v\u00e0 m\u1eddi b\u1ea1n sang tab t\u00ean mi\u1ec1n \u0111\u1ec3 chuy\u1ec3n nameserver v\u1ec1 h\u1ec7 th\u1ed1ng DNS c\u1ee7a ivi.vn. \u0110\u1ecdc \u0111\u01b0\u1ee3c c\u1ea3nh b\u00e1o \u0111\u00f3 l\u00e0 ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c m\u1ed9t bu\u1ed5i chi\u1ec1u.<\/p>\n<p>Ki\u1ec3m tra nameserver hi\u1ec7n h\u00e0nh b\u1eb1ng m\u1ed9t l\u1ec7nh:<\/p>\n<pre>dig NS tenmien.com +short\nnslookup -type=NS tenmien.com<\/pre>\n<p>K\u1ebft qu\u1ea3 tr\u1ea3 v\u1ec1 l\u00e0 danh s\u00e1ch nameserver \u0111ang c\u00f3 th\u1ea9m quy\u1ec1n. N\u1ebfu n\u00f3 kh\u00f4ng ph\u1ea3i b\u1ed9 b\u1ea1n ngh\u0129, d\u1eebng l\u1ea1i v\u00e0 x\u1eed l\u00fd b\u01b0\u1edbc n\u00e0y tr\u01b0\u1edbc, \u0111\u1eebng s\u1eeda b\u1ea3n ghi th\u00eam n\u1eefa.<\/p>\n<h2>A hay CNAME: ch\u1ecdn \u0111\u00fang lo\u1ea1i b\u1ea3n ghi<\/h2>\n<p>Hai lo\u1ea1i b\u1ea3n ghi b\u1ea1n d\u00f9ng \u0111\u1ebfn 95% th\u1eddi gian:<\/p>\n<table>\n<thead>\n<tr>\n<th><\/th>\n<th>B\u1ea3n ghi A<\/th>\n<th>B\u1ea3n ghi CNAME<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Gi\u00e1 tr\u1ecb ch\u1ee9a g\u00ec<\/td>\n<td>M\u1ed9t \u0111\u1ecba ch\u1ec9 IPv4, v\u00ed d\u1ee5 <code>203.0.113.10<\/code><\/td>\n<td>M\u1ed9t t\u00ean mi\u1ec1n kh\u00e1c, v\u00ed d\u1ee5 <code>dns.nhacungcap.io<\/code><\/td>\n<\/tr>\n<tr>\n<td>D\u00f9ng khi<\/td>\n<td>B\u1ea1n bi\u1ebft ch\u1eafc \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7 v\u00e0 n\u00f3 \u1ed5n \u0111\u1ecbnh<\/td>\n<td>B\u00ean kia b\u1ea3o b\u1ea1n tr\u1ecf v\u1ec1 t\u00ean mi\u1ec1n c\u1ee7a h\u1ecd<\/td>\n<\/tr>\n<tr>\n<td>Khi b\u00ean kia \u0111\u1ed5i m\u00e1y ch\u1ee7<\/td>\n<td>B\u1ea1n ph\u1ea3i t\u1ef1 v\u00e0o s\u1eeda l\u1ea1i IP<\/td>\n<td>B\u1ea1n kh\u00f4ng ph\u1ea3i l\u00e0m g\u00ec, h\u1ecd s\u1eeda b\u00ean h\u1ecd<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1eb7t \u1edf g\u1ed1c <code>@<\/code> \u0111\u01b0\u1ee3c kh\u00f4ng<\/td>\n<td>\u0110\u01b0\u1ee3c<\/td>\n<td>Theo chu\u1ea9n th\u00ec kh\u00f4ng, tr\u1eeb khi nh\u00e0 cung c\u1ea5p DNS h\u1ed7 tr\u1ee3 c\u01a1 ch\u1ebf thay th\u1ebf<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>D\u00f2ng cu\u1ed1i l\u00e0 ch\u1ed7 hay g\u00e2y b\u1ef1c. Theo quy \u0111\u1ecbnh c\u1ee7a DNS, m\u1ed9t t\u00ean \u0111\u00e3 c\u00f3 b\u1ea3n ghi CNAME th\u00ec kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f3 b\u1ea5t k\u1ef3 b\u1ea3n ghi lo\u1ea1i n\u00e0o kh\u00e1c t\u1ea1i c\u00f9ng t\u00ean \u0111\u00f3. Trong khi g\u1ed1c c\u1ee7a t\u00ean mi\u1ec1n b\u1eaft bu\u1ed9c lu\u00f4n t\u1ed3n t\u1ea1i b\u1ea3n ghi SOA v\u00e0 NS. Hai \u0111i\u1ec1u \u0111\u00f3 m\u00e2u thu\u1eabn, n\u00ean CNAME \u1edf g\u1ed1c l\u00e0 sai chu\u1ea9n.<\/p>\n<p>H\u1eadu qu\u1ea3 th\u1ef1c t\u1ebf n\u1ebfu b\u1ea1n c\u1ed1 \u00e9p: b\u1ea3n ghi MX \u1edf g\u1ed1c c\u0169ng b\u1ecb v\u00f4 hi\u1ec7u, t\u1ee9c l\u00e0 <strong>email theo t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n ng\u1eebng nh\u1eadn th\u01b0<\/strong>. \u0110\u00e2y l\u00e0 ki\u1ec3u h\u1ecfng \u00e2m th\u1ea7m \u2014 website ch\u1ea1y ngon, c\u00f2n th\u01b0 kh\u00e1ch g\u1eedi t\u1edbi th\u00ec b\u1eadt l\u1ea1i ng\u01b0\u1eddi g\u1eedi m\u00e0 b\u1ea1n kh\u00f4ng bi\u1ebft.<\/p>\n<p>C\u00e1ch x\u1eed l\u00fd ph\u1ed5 bi\u1ebfn:<\/p>\n<ul>\n<li>D\u00f9ng m\u1ed9t t\u00ean mi\u1ec1n con cho landing page, v\u00ed d\u1ee5 <code>lp.tenmien.com<\/code> ho\u1eb7c <code>www.tenmien.com<\/code>, r\u1ed3i \u0111\u1eb7t CNAME \u1edf \u0111\u00f3. G\u1ed1c \u0111\u1ec3 chuy\u1ec3n h\u01b0\u1edbng sang t\u00ean mi\u1ec1n con.<\/li>\n<li>Ho\u1eb7c d\u00f9ng nh\u00e0 cung c\u1ea5p DNS c\u00f3 h\u1ed7 tr\u1ee3 b\u1ea3n ghi ki\u1ec3u ALIAS: b\u00ean ngo\u00e0i tr\u00f4ng nh\u01b0 CNAME, nh\u01b0ng m\u00e1y ch\u1ee7 t\u1ef1 ph\u00e2n gi\u1ea3i s\u1eb5n r\u1ed3i tr\u1ea3 v\u1ec1 \u0111\u1ecba ch\u1ec9 IP, n\u00ean kh\u00f4ng vi ph\u1ea1m quy t\u1eafc tr\u00ean. Trong m\u00e0n Landing Page c\u1ee7a ivi.vn, ph\u1ea7n n\u00e0y h\u1ec7 th\u1ed1ng t\u1ef1 lo khi b\u1ea1n b\u1ea5m k\u00edch ho\u1ea1t; c\u00f2n khi t\u1ef1 khai b\u00e1o \u1edf n\u01a1i kh\u00e1c th\u00ec ph\u1ea3i ki\u1ec3m tra tr\u01b0\u1edbc.<\/li>\n<\/ul>\n<p>V\u00f9ng DNS tr\u00ean ivi.vn nh\u1eadn s\u00e1u lo\u1ea1i b\u1ea3n ghi: <code>A<\/code>, <code>AAAA<\/code>, <code>CNAME<\/code>, <code>MX<\/code>, <code>TXT<\/code>, <code>CAA<\/code>. <code>AAAA<\/code> l\u00e0 b\u1ea3n IPv6 c\u1ee7a <code>A<\/code>. <code>TXT<\/code> gi\u1eef c\u00e1c chu\u1ed7i x\u00e1c th\u1ef1c nh\u01b0 SPF hay DKIM cho email. <code>CAA<\/code> khai b\u00e1o t\u1ed5 ch\u1ee9c n\u00e0o \u0111\u01b0\u1ee3c ph\u00e9p c\u1ea5p ch\u1ee9ng ch\u1ec9 b\u1ea3o m\u1eadt cho t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n.<\/p>\n<h2>TTL: v\u00ec sao \u0111\u1ed5i xong kh\u00f4ng th\u1ea5y ngay<\/h2>\n<p>M\u1ed7i b\u1ea3n ghi \u0111i k\u00e8m m\u1ed9t con s\u1ed1 TTL t\u00ednh b\u1eb1ng gi\u00e2y. N\u00f3 l\u00e0 l\u1eddi cho ph\u00e9p: m\u00e1y ch\u1ee7 ph\u00e2n gi\u1ea3i n\u00e0o nh\u1eadn \u0111\u01b0\u1ee3c c\u00e2u tr\u1ea3 l\u1eddi n\u00e0y th\u00ec \u0111\u01b0\u1ee3c gi\u1eef l\u1ea1i v\u00e0 d\u00f9ng l\u1ea1i trong ch\u1eebng \u1ea5y gi\u00e2y, kh\u00f4ng c\u1ea7n h\u1ecfi l\u1ea1i.<\/p>\n<p>\u0110i\u1ec3m h\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi hi\u1ec3u ng\u01b0\u1ee3c: khi b\u1ea1n s\u1eeda m\u1ed9t b\u1ea3n ghi, th\u1ee9 quy\u1ebft \u0111\u1ecbnh b\u1ea1n ph\u1ea3i ch\u1edd bao l\u00e2u l\u00e0 <strong>TTL c\u1ee7a b\u1ea3n ghi c\u0169<\/strong>, kh\u00f4ng ph\u1ea3i TTL c\u1ee7a b\u1ea3n ghi m\u1edbi. C\u00e1c m\u00e1y ch\u1ee7 \u0111\u00e3 l\u01b0u b\u1ea3n c\u0169 v\u1eabn tr\u1ea3 b\u1ea3n c\u0169 cho t\u1edbi khi h\u1ebft h\u1ea1n l\u01b0u \u0111\u1ec7m c\u1ee7a ch\u00ednh n\u00f3. \u0110\u1eb7t TTL m\u1edbi xu\u1ed1ng 300 gi\u00e2y kh\u00f4ng r\u00fat ng\u1eafn \u0111\u01b0\u1ee3c l\u1ea7n ch\u1edd n\u00e0y \u2014 n\u00f3 ch\u1ec9 gi\u00fap cho l\u1ea7n \u0111\u1ed5i <em>sau<\/em>.<\/p>\n<p>V\u00ec v\u1eady quy tr\u00ecnh chuy\u00ean nghi\u1ec7p l\u00e0: bi\u1ebft tr\u01b0\u1edbc s\u1ebd \u0111\u1ed5i th\u00ec h\u1ea1 TTL xu\u1ed1ng m\u1ee9c th\u1ea5p m\u1ed9t hai ng\u00e0y tr\u01b0\u1edbc, \u0111\u1ed5i b\u1ea3n ghi, ki\u1ec3m tra xong r\u1ed3i n\u00e2ng TTL tr\u1edf l\u1ea1i. Tr\u00ean ivi.vn, \u00f4 th\u1eddi gian l\u01b0u \u0111\u1ec7m nh\u1eadn gi\u00e1 tr\u1ecb trong kho\u1ea3ng 300 \u0111\u1ebfn 86400 gi\u00e2y; \u0111\u1eb7t ngo\u00e0i kho\u1ea3ng \u0111\u00f3 th\u00ec h\u1ec7 th\u1ed1ng t\u1ef1 k\u1eb9p v\u1ec1 bi\u00ean, n\u00ean s\u1ed1 b\u1ea1n nh\u00ecn th\u1ea5y c\u00f3 th\u1ec3 l\u1ec7ch s\u1ed1 th\u1eadt s\u1ef1 \u0111\u01b0\u1ee3c l\u01b0u.<\/p>\n<p>C\u00f3 m\u1ed9t d\u1ea1ng l\u01b0u \u0111\u1ec7m n\u1eefa \u00edt ng\u01b0\u1eddi bi\u1ebft: <strong>l\u01b0u \u0111\u1ec7m c\u00e2u tr\u1ea3 l\u1eddi ph\u1ee7 \u0111\u1ecbnh<\/strong>. N\u1ebfu b\u1ea1n m\u1edf th\u1eed t\u00ean mi\u1ec1n <em>tr\u01b0\u1edbc khi<\/em> t\u1ea1o b\u1ea3n ghi, m\u00e1y ch\u1ee7 ph\u00e2n gi\u1ea3i nh\u1eadn \u0111\u01b0\u1ee3c c\u00e2u tr\u1ea3 l\u1eddi &#8220;kh\u00f4ng t\u1ed3n t\u1ea1i&#8221; v\u00e0 n\u00f3 c\u0169ng l\u01b0u c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00f3 l\u1ea1i m\u1ed9t kho\u1ea3ng th\u1eddi gian. \u0110\u00f3 l\u00e0 l\u00fd do vi\u1ec7c n\u00f4n n\u00f3ng ki\u1ec3m tra s\u1edbm l\u1ea1i l\u00e0m b\u1ea1n ph\u1ea3i ch\u1edd l\u00e2u h\u01a1n. T\u1ea1o b\u1ea3n ghi tr\u01b0\u1edbc, ki\u1ec3m tra sau.<\/p>\n<h2>Ki\u1ec3m tra b\u1eb1ng c\u00f4ng c\u1ee5 tra c\u1ee9u<\/h2>\n<p>\u0110\u1eebng d\u00f9ng tr\u00ecnh duy\u1ec7t l\u00e0m c\u00f4ng c\u1ee5 ch\u1ea9n \u0111o\u00e1n: tr\u00ecnh duy\u1ec7t v\u00e0 h\u1ec7 \u0111i\u1ec1u h\u00e0nh \u0111\u1ec1u gi\u1eef b\u1ed9 nh\u1edb \u0111\u1ec7m ri\u00eang n\u00ean kh\u00f4ng ph\u1ea3n \u00e1nh tr\u1ea1ng th\u00e1i DNS th\u1eadt. H\u1ecfi th\u1eb3ng b\u1eb1ng l\u1ec7nh:<\/p>\n<pre>dig +short lp.tenmien.com CNAME\ndig +short lp.tenmien.com A\ndig NS tenmien.com +short\ndig @8.8.8.8 lp.tenmien.com<\/pre>\n<p>Tr\u00ean Windows kh\u00f4ng c\u00f3 <code>dig<\/code> s\u1eb5n th\u00ec d\u00f9ng:<\/p>\n<pre>nslookup -type=CNAME lp.tenmien.com\nnslookup -type=A lp.tenmien.com\nipconfig \/flushdns<\/pre>\n<p>C\u00e1ch \u0111\u1ecdc k\u1ebft qu\u1ea3:<\/p>\n<ul>\n<li><strong>Tr\u1ea3 v\u1ec1 \u0111\u00fang gi\u00e1 tr\u1ecb b\u1ea1n v\u1eeba \u0111\u1eb7t:<\/strong> t\u1ea7ng DNS xong vi\u1ec7c. N\u1ebfu trang v\u1eabn l\u1ed7i th\u00ec v\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf ph\u00eda m\u00e1y ch\u1ee7 \u0111\u00edch, kh\u00f4ng ph\u1ea3i \u1edf \u0111\u00e2y.<\/li>\n<li><strong>Tr\u1ea3 v\u1ec1 gi\u00e1 tr\u1ecb c\u0169:<\/strong> c\u00f2n trong th\u1eddi gian l\u01b0u \u0111\u1ec7m. Ch\u1edd h\u1ebft TTL c\u0169.<\/li>\n<li><strong>Kh\u00f4ng tr\u1ea3 v\u1ec1 g\u00ec:<\/strong> b\u1ea3n ghi ch\u01b0a t\u1ed3n t\u1ea1i \u1edf nameserver c\u00f3 th\u1ea9m quy\u1ec1n, ho\u1eb7c b\u1ea1n \u0111ang s\u1eeda \u1edf sai n\u01a1i. Quay l\u1ea1i ki\u1ec3m tra nameserver.<\/li>\n<li><strong>H\u1ecfi th\u1eb3ng m\u1ed9t m\u00e1y ch\u1ee7 ph\u00e2n gi\u1ea3i c\u00f4ng c\u1ed9ng ra k\u1ebft qu\u1ea3 \u0111\u00fang, c\u00f2n m\u00e1y b\u1ea1n ra k\u1ebft qu\u1ea3 c\u0169:<\/strong> b\u1ea3n ghi \u0111\u00e3 lan r\u1ed3i, ch\u1ec9 m\u00e1y ho\u1eb7c nh\u00e0 m\u1ea1ng c\u1ee7a b\u1ea1n c\u00f2n gi\u1eef b\u1ea3n c\u0169. Xo\u00e1 \u0111\u1ec7m m\u00e1y r\u1ed3i th\u1eed l\u1ea1i.<\/li>\n<\/ul>\n<p>Ngo\u00e0i d\u00f2ng l\u1ec7nh c\u00f2n c\u00f3 c\u00e1c trang tra c\u1ee9u DNS nhi\u1ec1u \u0111i\u1ec3m, h\u1ecfi c\u00f9ng l\u00fac t\u1eeb nhi\u1ec1u qu\u1ed1c gia. Ch\u00fang h\u1eefu \u00edch \u0111\u1ec3 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi &#8220;ch\u1ec9 m\u00ecnh t\u00f4i th\u1ea5y sai hay c\u1ea3 th\u1ebf gi\u1edbi \u0111\u1ec1u sai&#8221;.<\/p>\n<h2>B\u1ea3ng l\u1ed7i hay g\u1eb7p<\/h2>\n<table>\n<thead>\n<tr>\n<th>Hi\u1ec7n t\u01b0\u1ee3ng<\/th>\n<th>Nguy\u00ean nh\u00e2n<\/th>\n<th>C\u00e1ch s\u1eeda<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>S\u1eeda b\u1ea3n ghi m\u00e3i kh\u00f4ng \u0103n<\/td>\n<td>Nameserver \u0111ang tr\u1ecf v\u1ec1 n\u01a1i kh\u00e1c<\/td>\n<td>Chuy\u1ec3n nameserver v\u1ec1 n\u01a1i b\u1ea1n \u0111ang s\u1eeda, r\u1ed3i ch\u1edd h\u1ebft TTL<\/td>\n<\/tr>\n<tr>\n<td>Ra trang c\u0169 d\u00f9 \u0111\u00e3 \u0111\u1ed5i<\/td>\n<td>B\u1ea3n ghi A c\u0169 v\u1eabn c\u00f2n, n\u1eb1m song song v\u1edbi b\u1ea3n ghi m\u1edbi<\/td>\n<td>Xo\u00e1 b\u1ea3n ghi c\u0169; m\u1ed9t t\u00ean ch\u1ec9 n\u00ean c\u00f3 m\u1ed9t \u0111\u00edch<\/td>\n<\/tr>\n<tr>\n<td>G\u1ed1c ch\u1ea1y, th\u00eam <code>www<\/code> th\u00ec l\u1ed7i<\/td>\n<td>Ch\u1ec9 t\u1ea1o b\u1ea3n ghi \u1edf g\u1ed1c, qu\u00ean t\u00ean mi\u1ec1n con <code>www<\/code><\/td>\n<td>T\u1ea1o th\u00eam b\u1ea3n ghi cho <code>www<\/code>, th\u01b0\u1eddng l\u00e0 CNAME tr\u1ecf v\u1ec1 g\u1ed1c<\/td>\n<\/tr>\n<tr>\n<td>Web ch\u1ea1y nh\u01b0ng email ch\u1ebft<\/td>\n<td>\u0110\u1eb7t CNAME \u1edf g\u1ed1c l\u00e0m v\u00f4 hi\u1ec7u b\u1ea3n ghi MX<\/td>\n<td>Chuy\u1ec3n landing page sang t\u00ean mi\u1ec1n con, tr\u1ea3 g\u1ed1c v\u1ec1 b\u1ea3n ghi A<\/td>\n<\/tr>\n<tr>\n<td>Tr\u00ecnh duy\u1ec7t b\u00e1o k\u1ebft n\u1ed1i kh\u00f4ng an to\u00e0n<\/td>\n<td>Ch\u1ee9ng ch\u1ec9 ch\u01b0a c\u1ea5p xong; b\u00ean c\u1ea5p ph\u1ea3i x\u00e1c th\u1ef1c quy\u1ec1n ki\u1ec3m so\u00e1t qua HTTP ho\u1eb7c qua b\u1ea3n ghi DNS, n\u00ean ph\u1ea3i tr\u1ecf \u0111\u00fang tr\u01b0\u1edbc \u0111\u00e3<\/td>\n<td>Ch\u1edd ch\u1ee9ng ch\u1ec9 \u0111\u01b0\u1ee3c c\u1ea5p, \u0111\u1eebng \u0111\u1ed5i l\u1ea1i DNS gi\u1eefa ch\u1eebng. Chi ti\u1ebft \u1edf <a href=\"\/blog\/huong-dan-ssl-lets-encrypt\/\">b\u00e0i v\u1ec1 ch\u1ee9ng ch\u1ec9 SSL<\/a><\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed5i c\u1ea3 bu\u1ed5i v\u1eabn ch\u01b0a lan<\/td>\n<td>TTL c\u0169 \u0111\u1eb7t \u1edf m\u1ee9c m\u1ed9t ng\u00e0y<\/td>\n<td>Ch\u1edd h\u1ebft chu k\u1ef3; l\u1ea7n sau h\u1ea1 TTL tr\u01b0\u1edbc khi \u0111\u1ed5i<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y n\u00e0y v\u00e0o \u0111\u01b0\u1ee3c, m\u00e1y kia kh\u00f4ng<\/td>\n<td>Hai m\u00e1y d\u00f9ng m\u00e1y ch\u1ee7 ph\u00e2n gi\u1ea3i kh\u00e1c nhau, lan ch\u01b0a \u0111\u1ec1u<\/td>\n<td>B\u00ecnh th\u01b0\u1eddng, ch\u1edd th\u00eam; ki\u1ec3m tra b\u1eb1ng c\u00f4ng c\u1ee5 tra c\u1ee9u nhi\u1ec1u \u0111i\u1ec3m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Ba th\u00f3i quen tr\u00e1nh \u0111\u01b0\u1ee3c ph\u1ea7n l\u1edbn r\u1eafc r\u1ed1i<\/h2>\n<ul>\n<li><strong>Ghi l\u1ea1i c\u1ea5u h\u00ecnh tr\u01b0\u1edbc khi s\u1eeda.<\/strong> Ch\u1ee5p m\u00e0n h\u00ecnh b\u1ea3ng b\u1ea3n ghi hi\u1ec7n t\u1ea1i. Khi c\u00f3 s\u1ef1 c\u1ed1, bi\u1ebft tr\u1ea1ng th\u00e1i c\u0169 gi\u00fap quay lui trong hai ph\u00fat thay v\u00ec d\u1ef1ng l\u1ea1i t\u1eeb tr\u00ed nh\u1edb.<\/li>\n<li><strong>\u0110\u1ed5i m\u1ed9t th\u1ee9 m\u1ed7i l\u1ea7n.<\/strong> \u0110\u1ed5i nameserver, \u0111\u1ed5i b\u1ea3n ghi g\u1ed1c v\u00e0 \u0111\u1ed5i b\u1ea3n ghi <code>www<\/code> c\u00f9ng l\u00fac th\u00ec khi h\u1ecfng b\u1ea1n kh\u00f4ng bi\u1ebft c\u00e1i n\u00e0o g\u00e2y ra.<\/li>\n<li><strong>\u0110\u1eebng \u0111\u1ee5ng v\u00e0o b\u1ea3n ghi MX v\u00e0 TXT khi ch\u1ec9 \u0111\u1ecbnh tr\u1ecf web.<\/strong> Ch\u00fang ph\u1ee5c v\u1ee5 email. Xo\u00e1 nh\u1ea7m m\u1ed9t b\u1ea3n ghi TXT x\u00e1c th\u1ef1c ng\u01b0\u1eddi g\u1eedi l\u00e0 th\u01b0 c\u1ee7a b\u1ea1n b\u1eaft \u0111\u1ea7u r\u01a1i v\u00e0o h\u1ed9p th\u01b0 r\u00e1c, m\u00e0 tri\u1ec7u ch\u1ee9ng l\u1ed9 ra r\u1ea5t mu\u1ed9n.<\/li>\n<\/ul>\n<h2>T\u00f3m l\u1ea1i<\/h2>\n<p>Tr\u1ecf t\u00ean mi\u1ec1n v\u1ec1 landing page th\u1ef1c ch\u1ea5t l\u00e0 b\u1ed1n c\u00e2u h\u1ecfi theo th\u1ee9 t\u1ef1: nameserver c\u00f3 \u0111\u00fang ch\u1ed7 kh\u00f4ng, lo\u1ea1i b\u1ea3n ghi c\u00f3 \u0111\u00fang kh\u00f4ng, c\u00f2n b\u1ea3n ghi c\u0169 n\u00e0o ch\u1ed3ng l\u00ean kh\u00f4ng, v\u00e0 TTL c\u0169 \u0111\u00e3 h\u1ebft ch\u01b0a. Tr\u1ea3 l\u1eddi \u0111\u01b0\u1ee3c b\u1ed1n c\u00e2u \u0111\u00f3 b\u1eb1ng c\u00f4ng c\u1ee5 tra c\u1ee9u l\u00e0 b\u1ea1n kh\u00f4ng c\u00f2n ph\u1ea3i \u0111o\u00e1n. Ri\u00eang chuy\u1ec7n CNAME \u1edf g\u1ed1c th\u00ec nh\u1edb m\u1ed9t \u0111i\u1ec1u: n\u00f3 c\u00f3 th\u1ec3 l\u1ea5y \u0111i email c\u1ee7a b\u1ea1n m\u00e0 kh\u00f4ng b\u00e1o tr\u01b0\u1edbc.<\/p>\n<p>N\u1ebfu b\u1ea1n mu\u1ed1n ph\u1ea7n thao t\u00e1c c\u1ee5 th\u1ec3 tr\u00ean dashboard thay v\u00ec ph\u1ea7n l\u00fd thuy\u1ebft, xem <a href=\"https:\/\/ivi.vn\/docs#bai-4-huong-dan-tro-ten-mien-landing-page\">h\u01b0\u1edbng d\u1eabn tr\u1ecf t\u00ean mi\u1ec1n v\u1ec1 Landing Page trong dashboard<\/a>. C\u00f2n n\u1ebfu b\u1ea1n \u0111ang c\u1ea7n m\u1ed9t t\u00ean mi\u1ec1n \u0111\u1ec3 b\u1eaft \u0111\u1ea7u, tra th\u1eed t\u1ea1i <a href=\"https:\/\/ivi.vn\/search\">ivi.vn\/search<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea3n ghi A v\u00e0 CNAME kh\u00e1c nhau \u1edf \u0111\u00e2u, v\u00ec sao CNAME \u1edf g\u1ed1c c\u00f3 th\u1ec3 l\u00e0m ch\u1ebft email, TTL c\u0169 m\u1edbi l\u00e0 th\u1ee9 quy\u1ebft \u0111\u1ecbnh th\u1eddi gian ch\u1edd, v\u00e0 c\u00e1ch d\u00f9ng dig hay nslookup \u0111\u1ec3 t\u1ef1 ch\u1ea9n \u0111o\u00e1n.<\/p>\n","protected":false},"author":1,"featured_media":29,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-30","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-quan-tri-web"],"_links":{"self":[{"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/posts\/30","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/comments?post=30"}],"version-history":[{"count":1,"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/posts\/30\/revisions"}],"predecessor-version":[{"id":73,"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/posts\/30\/revisions\/73"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/media\/29"}],"wp:attachment":[{"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/media?parent=30"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/categories?post=30"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ivi.vn\/blog\/wp-json\/wp\/v2\/tags?post=30"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}