{"id":15730,"date":"2021-12-31T03:55:00","date_gmt":"2021-12-30T20:55:00","guid":{"rendered":"https:\/\/blog.tinohost.com\/?p=1078"},"modified":"2025-06-11T14:02:30","modified_gmt":"2025-06-11T07:02:30","slug":"ptr-record-la-gi","status":"publish","type":"post","link":"https:\/\/tino.vn\/blog\/ptr-record-la-gi\/","title":{"rendered":"PTR Record l\u00e0 g\u00ec? Quy tr\u00ecnh ki\u1ec3m tra PTR Record"},"content":{"rendered":"\n<p><strong>Gi\u1ed1ng nh\u01b0 m\u1ed9t b\u1ee9c th\u01b0 \u1edf b\u01b0u \u0111i\u1ec7n, <\/strong><a href=\"https:\/\/tino.vn\/blog\/dns-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>DNS<\/strong><\/a><strong> (h\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n) c\u1ea7n m\u1ed9t \u0111\u1ecba ch\u1ec9 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a m\u1ed9t trang web trong h\u1ec7 th\u1ed1ng Internet. \u0110\u00e2y l\u00e0 ch\u00eca kh\u00f3a ch\u1ee7 ch\u1ed1t c\u1ee7a c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng nh\u01b0 mail server, web server\u2026 DNS c\u00f3 r\u1ea5t nhi\u1ec1u th\u00e0nh ph\u1ea7n v\u1edbi nhi\u1ec1u b\u1ea3n ghi kh\u00e1c nhau nh\u01b0 <\/strong><a href=\"https:\/\/tino.vn\/blog\/huong-dan-tao-mx-record\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>MX Record<\/strong><\/a><strong>, A Record, PTR Record,&#8230; Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u v\u1ec1 PTR Record l\u00e0 g\u00ec nh\u00e9!<\/strong><\/p>\n\n\n\n<h2 id=\"T\u1ed5ng_quan_v\u1ec1_PTR_Record\"><strong>T\u1ed5ng quan v\u1ec1 PTR Record<\/strong><\/h2>\n\n\n\n<h3 id=\"PTR_Record_l\u00e0_g\u00ec?\"><strong>PTR Record l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p><strong>PTR Record<\/strong> (<strong>Point Record<\/strong> , t\u1ea1m d\u1ecbch:<em> b\u1ea3n ghi ng\u01b0\u1ee3c, <\/em>hay c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <em>Reverse DNS<\/em>) l\u00e0 m\u1ed9t b\u1ea3n ghi th\u1ef1c hi\u1ec7n vi\u1ec7c chuy\u1ec3n m\u1ed9t \u0111\u1ecba ch\u1ec9 IP \u0111\u1ebfn <a href=\"https:\/\/tino.vn\/blog\/hosting-va-domain\/\" target=\"_blank\" rel=\"noreferrer noopener\">t\u00ean mi\u1ec1n<\/a>.&nbsp;<\/p>\n\n\n\n<p>Hi\u1ec3u \u0111\u01a1n gi\u1ea3n, PTR Record gi\u1ed1ng nh\u01b0 m\u1ed9t phi\u00ean b\u1ea3n ng\u01b0\u1ee3c c\u1ee7a A record. N\u1ebfu A record tr\u1ecf t\u00ean mi\u1ec1n v\u00e0o m\u1ed9t \u0111\u1ecba ch\u1ec9 IP th\u00ec PTR Record tr\u1ecf m\u1ed9t \u0111\u1ecba ch\u1ec9 v\u00e0o m\u1ed9t hostname. Tuy nhi\u00ean, c\u1ea3 2 b\u1ea3n ghi n\u00e0y l\u00e0m vi\u1ec7c ho\u00e0n to\u00e0n \u0111\u1ed9c l\u1eadp v\u1edbi nhau.&nbsp;<\/p>\n\n\n\n<p>V\u00ed d\u1ee5: N\u1ebfu A record c\u1ee7a Tinohost tr\u1ecf t\u1edbi 12.12.128.xx, trong khi 13.13.128.xx tr\u1ecf t\u1edbi m\u1ed9t hostname ho\u00e0n to\u00e0n kh\u00e1c.<\/p>\n\n\n\n<p>PTR Record th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra x\u00e1c th\u1ef1c ng\u01b0\u1ee3c (reverse DNS lookup) v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong vi\u1ec7c ki\u1ec3m tra xem m\u1ed9t \u0111\u1ecba ch\u1ec9 IP c\u1ee5 th\u1ec3 c\u00f3 li\u00ean k\u1ebft v\u1edbi m\u1ed9t t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3 n\u00e0o \u0111\u00f3 hay kh\u00f4ng.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"650\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-1.png\" alt=\"PTR-Record-la-gi\" class=\"wp-image-80089\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-1.png 650w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-1-300x185.png 300w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><figcaption class=\"wp-element-caption\"><strong>PTR Record l\u00e0 g\u00ec?<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 id=\"T\u00ean_mi\u1ec1n_ng\u01b0\u1ee3c_c\u00f3_g\u00ec_kh\u00e1c_v\u1edbi_t\u00ean_mi\u1ec1n_th\u00f4ng_th\u01b0\u1eddng?\"><strong>T\u00ean mi\u1ec1n ng\u01b0\u1ee3c c\u00f3 g\u00ec kh\u00e1c v\u1edbi t\u00ean mi\u1ec1n th\u00f4ng th\u01b0\u1eddng?<\/strong><\/h3>\n\n\n\n<p>Kh\u00f4ng gian t\u00ean mi\u1ec1n ng\u01b0\u1ee3c c\u0169ng \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng theo c\u01a1 ch\u1ebf ph\u00e2n c\u1ea5p gi\u1ed1ng nh\u01b0 t\u00ean mi\u1ec1n thu\u1eadn.<\/p>\n\n\n\n<p>C\u1ea5u tr\u00fac: <strong>ddd.ccc.bbb.aaa.in-addr. arpa.<\/strong><\/p>\n\n\n\n<p>Trong \u0111\u00f3: <strong>aaa, bbb, ccc, ddd<\/strong> l\u00e0 c\u00e1c s\u1ed1 vi\u1ebft trong h\u1ec7 th\u1eadp ph\u00e2n bi\u1ec3u di\u1ec5n gi\u00e1 tr\u1ecb c\u1ee7a 4 byte c\u1ea5u th\u00e0nh \u0111\u1ecba ch\u1ec9 IP.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>.arpa<\/strong> l\u00e0 m\u1ee9c cao nh\u1ea5t trong m\u1ecdi kh\u00f4ng gian t\u00ean mi\u1ec1n ng\u01b0\u1ee3c (\u00e1p d\u1ee5ng v\u1edbi c\u1ea3<a href=\"https:\/\/tino.vn\/blog\/dia-chi-ipv4-co-cau-truc-nhu-the-nao\/\" data-type=\"post\" data-id=\"69483\"> IPv4<\/a> v\u00e0 <a href=\"https:\/\/tino.vn\/blog\/ipv6-address-la-gi\/\" target=\"_blank\" data-type=\"post\" data-id=\"789\" rel=\"noreferrer noopener\">IPv6<\/a>).<\/li>\n\n\n\n<li><strong>in-addr.arpa<\/strong> l\u00e0 m\u1ee9c cao nh\u1ea5t trong kh\u00f4ng gian t\u00ean mi\u1ec1n ng\u01b0\u1ee3c \u00e1p d\u1ee5ng v\u1edbi th\u1ebf h\u1ec7 \u0111\u1ecba ch\u1ec9 IPv4.<\/li>\n\n\n\n<li><strong>ip6.arpa<\/strong> l\u00e0 m\u1ee9c cao nh\u1ea5t trong kh\u00f4ng gian t\u00ean mi\u1ec1n ng\u01b0\u1ee3c \u00e1p d\u1ee5ng v\u1edbi th\u1ebf h\u1ec7 \u0111\u1ecba ch\u1ec9 IPv6.<\/li>\n<\/ul>\n\n\n\n<p>V\u00ed d\u1ee5: M\u1ed9t m\u00e1y t\u00ednh tr\u00ean m\u1ea1ng c\u00f3 \u0111\u1ecba ch\u1ec9 IP l\u00e0 141.021.46.28 th\u00ec t\u00ean mi\u1ec1n ng\u01b0\u1ee3c \u1ee9ng v\u1edbi n\u00f3 s\u1ebd l\u00e0 28.46.021.141.in-addr. arpa.<\/p>\n\n\n\n<h3 id=\"T\u1ea1i_sao_c\u1ea7n_c\u00f3_PTR_Record?\"><strong>T\u1ea1i sao c\u1ea7n c\u00f3 PTR Record?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>X\u00e1c th\u1ef1c ng\u01b0\u1ee3c (Reverse DNS Lookup)<\/strong>: Khi b\u1ea1n mu\u1ed1n x\u00e1c \u0111\u1ecbnh t\u00ean mi\u1ec1n t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t \u0111\u1ecba ch\u1ec9 IP c\u1ee5 th\u1ec3, PTR Record r\u1ea5t h\u1eefu \u00edch. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 gi\u00fap x\u00e1c minh t\u00ednh \u0111\u00fang \u0111\u1eafn c\u1ee7a \u0111\u1ecba ch\u1ec9 IP v\u00e0 t\u1ea1o m\u1ed9t li\u00ean k\u1ebft \u0111\u00e1ng tin c\u1eady gi\u1eefa \u0111\u1ecba ch\u1ec9 IP v\u00e0 t\u00ean mi\u1ec1n.<\/li>\n\n\n\n<li><strong>Ki\u1ec3m tra SPAM<\/strong>: Nhi\u1ec1u h\u1ec7 th\u1ed1ng ch\u1ed1ng th\u01b0 r\u00e1c s\u1eed d\u1ee5ng reverse DNS lookup \u0111\u1ec3 ki\u1ec3m tra xem m\u00e1y ch\u1ee7 g\u1eedi th\u01b0 c\u00f3 \u0111\u00fang l\u00e0 m\u1ed9t m\u00e1y ch\u1ee7 h\u1ee3p l\u1ec7 kh\u00f4ng. N\u1ebfu kh\u00f4ng c\u00f3 PTR Record ho\u1eb7c PTR Record kh\u00f4ng ph\u00f9 h\u1ee3p, th\u01b0 c\u00f3 th\u1ec3 b\u1ecb coi l\u00e0 c\u00f3 kh\u1ea3 n\u0103ng l\u00e0 th\u01b0 r\u00e1c.<\/li>\n\n\n\n<li><strong>B\u1ea3o m\u1eadt v\u00e0 theo d\u00f5i ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng<\/strong>: PTR Record c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 trong vi\u1ec7c theo d\u00f5i v\u00e0 ki\u1ec3m so\u00e1t ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng. Khi x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1ecba ch\u1ec9 IP k\u1ebft n\u1ed1i \u0111\u1ebfn h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng x\u00e1c \u0111\u1ecbnh ngu\u1ed3n g\u1ed1c c\u1ee7a ch\u00fang th\u00f4ng qua t\u00ean mi\u1ec1n t\u01b0\u01a1ng \u1ee9ng.<\/li>\n\n\n\n<li><strong>Ph\u00e2n t\u00edch \u0111\u1ecba ch\u1ec9 IP<\/strong>: Khi b\u1ea1n c\u1ea7n xem x\u00e9t m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c \u0111\u1ecba ch\u1ec9 IP v\u00e0 t\u00ean mi\u1ec1n, PTR Record gi\u00fap b\u1ea1n t\u00ecm hi\u1ec3u v\u1ec1 ngu\u1ed3n g\u1ed1c v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a c\u00e1c m\u00e1y ch\u1ee7 ho\u1eb7c d\u1ecbch v\u1ee5.<\/li>\n\n\n\n<li><strong>X\u00e1c \u0111\u1ecbnh m\u00e1y ch\u1ee7 v\u00e0 d\u1ecbch v\u1ee5<\/strong>: PTR Record gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c m\u00e1y ch\u1ee7 ho\u1eb7c d\u1ecbch v\u1ee5 n\u1eb1m sau \u0111\u1ecba ch\u1ec9 IP c\u1ee5 th\u1ec3, gi\u00fap vi\u1ec7c qu\u1ea3n l\u00fd v\u00e0 x\u00e1c \u0111\u1ecbnh t\u00e0i nguy\u00ean m\u1ea1ng d\u1ec5 d\u00e0ng h\u01a1n.<\/li>\n\n\n\n<li><strong>\u0110\u00e1p \u1ee9ng y\u00eau c\u1ea7u reverse DNS lookup tr\u01b0\u1edbc khi nh\u1eadn email<\/strong>: Trong th\u1ef1c t\u1ebf, m\u1ed9t s\u1ed1 d\u1ecbch v\u1ee5 Internet \u0111\u00f2i h\u1ecfi h\u1ec7 th\u1ed1ng m\u00e1y ch\u1ee7 DNS ph\u1ea3i c\u00f3 ch\u1ee9c n\u0103ng chuy\u1ec3n \u0111\u1ed5i t\u1eeb \u0111\u1ecba ch\u1ec9 IP sang t\u00ean mi\u1ec1n. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p mail l\u1edbn nh\u01b0 <a href=\"https:\/\/vn.yahoo.com\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">yahoo.com<\/a>, <a href=\"https:\/\/mail.google.com\/mail\/u\/0\/#inbox\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">mail.google.com<\/a> lu\u00f4n l\u00e0m reverse DNS lookup tr\u01b0\u1edbc nh\u1eadn emails. PTR Record (t\u00ean mi\u1ec1n ng\u01b0\u1ee3c) ra \u0111\u1eddi nh\u1eb1m ph\u1ee5c v\u1ee5 m\u1ee5c \u0111\u00edch n\u00e0y.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"650\" height=\"400\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-2.png\" alt=\"tai-sao-can-PTR-Record\" class=\"wp-image-80091\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-2.png 650w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-2-300x185.png 300w\" sizes=\"(max-width: 650px) 100vw, 650px\" \/><figcaption class=\"wp-element-caption\"><strong>T\u1ea1i sao c\u1ea7n c\u00f3 PTR Record?<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n<h3 id=\"L\u00fd_do_b\u1ea1n_c\u1ea7n_c\u1eadp_nh\u1eadt_PTR_Record?\"><strong>L\u00fd do b\u1ea1n c\u1ea7n c\u1eadp nh\u1eadt PTR Record?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C\u1ea7n ch\u1ee9ng th\u1ef1c t\u00ean mi\u1ec1n \u0111\u00f3 khi ph\u00e2n gi\u1ea3i ng\u01b0\u1ee3c \u0111\u00fang IP server.<\/li>\n\n\n\n<li>T\u00ean mi\u1ec1n ph\u00e2n gi\u1ea3i ng\u01b0\u1ee3c \u0111\u00f3 l\u00e0 duy nh\u1ea5t cho server c\u1ee7a b\u1ea1n nh\u01b0 mail server.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"H\u01b0\u1edbng_d\u1eabn_c\u00e1ch_ki\u1ec3m_tra_PTR_Record&nbsp;\"><strong>H\u01b0\u1edbng d\u1eabn c\u00e1ch ki\u1ec3m tra PTR Record&nbsp;<\/strong><\/h2>\n\n\n\n<p>Khi&nbsp; ti\u1ebfp nh\u1eadn y\u00eau c\u1ea7u nh\u1eadn mail t\u1eeb 1 \u0111\u1ecba ch\u1ec9 IP tr\u00ean Internet, mail server s\u1ebd ti\u1ebfn h\u00e0nh&nbsp; ki\u1ec3m tra IP \u0111\u00f3 xem<a href=\"https:\/\/tino.vn\/blog\/hostname-la-gi\/\" data-type=\"post\" data-id=\"1085\"> hostname<\/a> l\u00e0 g\u00ec, hostname \u0111\u00f3 c\u00f3 n\u1eb1m trong MX Record c\u1ee7a domain c\u1ee7a email g\u1eedi \u0111\u1ebfn kh\u00f4ng. N\u1ebfu kh\u00f4ng \u0111\u00fang th\u00ec mail b\u1ecb coi l\u00e0 spam.&nbsp;<\/p>\n\n\n\n<h3 id=\"C\u00e1ch_1:_Ki\u1ec3m_tra_PTR_v\u1edbi_nslookup_ho\u1eb7c_dig\"><strong>C\u00e1ch 1: Ki\u1ec3m tra PTR v\u1edbi nslookup ho\u1eb7c dig<\/strong><\/h3>\n\n\n\n<p><a href=\"https:\/\/tino.vn\/blog\/he-dieu-hanh-windows-la-gi\/\" target=\"_blank\" data-type=\"post\" data-id=\"725\" rel=\"noreferrer noopener\">Windows<\/a> v\u00e0 H\u1ec7 Unix (<a href=\"https:\/\/tino.vn\/blog\/he-dieu-hanh-linux-la-gi\/\" target=\"_blank\" data-type=\"post\" data-id=\"15676\" rel=\"noreferrer noopener\">Linux<\/a>, <a href=\"https:\/\/tino.vn\/blog\/he-dieu-hanh-mac-os-la-gi\/\" data-type=\"post\" data-id=\"74217\">Mac OS<\/a>) c\u00f3 c\u00f4ng c\u1ee5 t\u00edch h\u1ee3p \u0111\u1ec3 ki\u1ec3m tra DNS records.<\/p>\n\n\n\n<h4 id=\"\u0110\u1ed1i_v\u1edbi_ng\u01b0\u1eddi_d\u00f9ng_Windows\"><strong>\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng Windows<\/strong><\/h4>\n\n\n\n<p><strong>B\u01b0\u1edbc 1: <\/strong>Truy c\u1eadp Start Menu c\u1ee7a Windows, g\u00f5 &#8220;<strong>cmd<\/strong>&#8221; v\u00e0 nh\u1ea5n <strong>Enter <\/strong>\u0111\u1ec3 \u0111\u1ebfn c\u1eeda s\u1ed5 <strong>Command Prompt.<\/strong><\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2:<\/strong> G\u00f5 l\u1ec7nh sau \u0111\u1ec3 l\u1ea5y <strong>hostname <\/strong>c\u1ee7a \u0111\u1ecba ch\u1ec9 IP: <strong>nslookup IP_ADDRESS<\/strong><\/p>\n\n\n\n<p>Trong \u0111\u00f3: thay<strong> IP_ADDESS <\/strong>th\u00e0nh <strong>\u0111\u1ecba ch\u1ec9 IP<\/strong> c\u1ee7a b\u1ea1n. \u0110\u1ec3 bi\u1ebft c\u00e1ch l\u1ea5y \u0111\u1ecba ch\u1ec9 IP, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o b\u00e0i vi\u1ebft:<a href=\"https:\/\/tino.vn\/blog\/dia-chi-ip-la-gi\/\" data-type=\"post\" data-id=\"61773\" target=\"_blank\" rel=\"noreferrer noopener\"> \u0110\u1ecba ch\u1ec9 IP l\u00e0 g\u00ec?<\/a><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"1024\" height=\"563\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-3.png\" alt=\"\" class=\"wp-image-80092\" style=\"width:768px;height:422px\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-3.png 1024w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-3-300x165.png 300w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-3-768x422.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<h4 id=\"\u0110\u1ed1i_v\u1edbi_ng\u01b0\u1eddi_d\u00f9ng_Linux_v\u00e0_Mac\"><strong>\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng Linux v\u00e0 Mac<\/strong><\/h4>\n\n\n\n<p><strong>B\u01b0\u1edbc 1:<\/strong> Tr\u00ean MacOS, b\u1ea1n truy c\u1eadp <strong>Terminal <\/strong>t\u1eeb <strong>launcher (F4)<\/strong>. M\u1ed9t s\u1ed1 Linux distribution cho ph\u00e9p truy c\u1eadp v\u00e0o terminal ch\u1ec9 b\u1eb1ng c\u00e1ch nh\u1ea5n <strong>Ctrl + Alt + T<\/strong>.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2:<\/strong> S\u1eed d\u1ee5ng l\u1ec7nh sau \u0111\u1ec3 ki\u1ec3m tra record: <strong>dig -x IP_ADDRESS<\/strong><\/p>\n\n\n\n<p>T\u01b0\u01a1ng t\u1ef1 nh\u01b0 tr\u00ean, thay<strong> IP_ADDESS <\/strong>th\u00e0nh <strong>\u0111\u1ecba ch\u1ec9 IP<\/strong> c\u1ee7a b\u1ea1n.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"574\" height=\"290\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-4.png\" alt=\"\" class=\"wp-image-80093\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-4.png 574w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-4-300x152.png 300w\" sizes=\"(max-width: 574px) 100vw, 574px\" \/><\/figure>\n<\/div>\n\n\n<h3 id=\"C\u00e1ch_2:_S\u1eed_d\u1ee5ng_tool_online\"><strong>C\u00e1ch 2: S\u1eed d\u1ee5ng tool online<\/strong><\/h3>\n\n\n\n<p><strong>B\u01b0\u1edbc 1:<\/strong> Sau khi tr\u1ecf <strong>PTR Record<\/strong>, b\u1ea1n vui l\u00f2ng ch\u1edd <strong>DNS <\/strong>c\u1eadp nh\u1eadt (nhanh nh\u1ea5t l\u00e0 5 ph\u00fat v\u00e0 ch\u1eadm nh\u1ea5t trong 24h)<\/p>\n\n\n\n<p>Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 <a href=\"https:\/\/mxtoolbox.com\/SuperTool.aspx?action=mx%3a&amp;run=toolpage\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Mxtoolbox<\/a>.<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 2:<\/strong> M\u1eb7c \u0111\u1ecbnh s\u1ebd l\u00e0 MX Lookup. B\u1ea1n h\u00e3y nh\u1ea5n v\u00e0o \u0111\u00f3 v\u00e0 ch\u1ecdn l\u1ea1i <strong>Reverse Lookup<\/strong> <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"1024\" height=\"671\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-5.png\" alt=\"\" class=\"wp-image-80094\" style=\"width:768px;height:503px\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-5.png 1024w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-5-300x197.png 300w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/11\/ptr-record-la-gi-5-768x503.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p><strong>B\u01b0\u1edbc 3:<\/strong> Nh\u1eadp \u0111\u1ecba ch\u1ec9 <strong>IP <\/strong>c\u1ee7a b\u1ea1n<\/p>\n\n\n\n<p><strong>B\u01b0\u1edbc 4:<\/strong> Ch\u1ecdn <strong>Reverse Lookup<\/strong> \u0111\u1ec3 ki\u1ec3m tra IP.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"587\" src=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/08\/image-212-1024x587.png\" alt=\"ptr-record-la-gi\" class=\"wp-image-76083\" style=\"width:768px;height:440px\" title=\"\" srcset=\"https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/08\/image-212-1024x587.png 1024w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/08\/image-212-300x172.png 300w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/08\/image-212-768x440.png 768w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/08\/image-212-1536x880.png 1536w, https:\/\/tino.vn\/blog\/wp-content\/uploads\/2023\/08\/image-212.png 1558w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>C\u00e1ch n\u00e0y t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n gi\u1ea3n h\u01a1n v\u00e0 b\u1ea1n s\u1ebd kh\u00f4ng c\u1ea7n ph\u1ea3i t\u1ed1n qu\u00e1 nhi\u1ec1u th\u1eddi gian \u0111\u1ec3 th\u1ef1c hi\u1ec7n. Ngo\u00e0i ra, b\u1ea1n c\u00f2n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 n\u00e0y cho nhi\u1ec1u m\u1ee5c \u0111\u00edch kh\u00e1c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o th\u1ef1c hi\u1ec7n \u0111\u00fang thao t\u00e1c v\u1edbi t\u00ean mi\u1ec1n \u0111\u1ea5y! V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ki\u1ec3m tra DNS<\/li>\n\n\n\n<li>Ki\u1ec3m tra MX<\/li>\n\n\n\n<li>Ki\u1ec3m tra IP, website c\u1ee7a b\u1ea1n c\u00f3 n\u1eb1m trong danh s\u00e1ch <a href=\"https:\/\/tino.vn\/blog\/blacklist-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Blacklist<\/a> hay kh\u00f4ng<\/li>\n\n\n\n<li>\u2026<\/li>\n<\/ul>\n\n\n\n<p>Nh\u01b0 v\u1eady, ch\u00fang ta \u0111\u00e3 c\u00f9ng nhau t\u00ecm hi\u1ec3u v\u1ec1 PTR Record l\u00e0 g\u00ec c\u0169ng nh\u01b0 c\u00e1ch \u0111\u1ec3 ki\u1ec3m tra PTR Record t\u1eeb Windows, Mac OS cho \u0111\u1ebfn Linux c\u0169ng nh\u01b0 c\u00e1ch d\u00f9ng cong c\u1ee5 tr\u1ef1c tuy\u1ebfn \u0111\u1ec3 thao t\u00e1c nhanh ch\u00f3ng h\u01a1n. Tino Group hi v\u1ecdng r\u1eb1ng nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y c\u00f3 th\u1ec3 ph\u1ee5c v\u1ee5 cho nhu c\u1ea7u c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h2 id=\"FAQs_v\u1ec1_PTR_Record\"><strong>FAQs v\u1ec1 PTR Record<\/strong><\/h2>\n\n\n\t\t<section\t\thelp class=\"sc_fs_faq sc_card    \"\n\t\t\t\t>\n\t\t\t\t<h2 id=\"C\u00f3_th\u1ec3_s\u1eed_d\u1ee5ng_PTR_Record_v\u00e0o_m\u1ee5c_\u0111\u00edch_ch\u1ed1ng_spam_hay_kh\u00f4ng?\">C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng PTR Record v\u00e0o m\u1ee5c \u0111\u00edch ch\u1ed1ng spam hay kh\u00f4ng?<\/h2>\t\t\t\t<div>\n\t\t\t\t\t\t<div class=\"sc_fs_faq__content\">\n\t\t\t\t\n\n<p>C\u00f3. Hi\u1ec7n t\u1ea1i, c\u00f3 r\u1ea5t nhi\u1ec1u b\u1ed9 l\u1ecdc email, tin nh\u1eafn s\u1eed d\u1ee5ng PTR Record \u0111\u1ec3 ki\u1ec3m tra t\u00ean mi\u1ec1n v\u00e0 \u0111\u1ecba ch\u1ec9 email xem, li\u1ec7u nh\u1eefng email n\u00e0y c\u00f3 \u0111\u1ebfn t\u1eeb nh\u1eefng m\u00e1y ch\u1ee7 email h\u1ee3p ph\u00e1p, kh\u00f4ng n\u1eb1m trong blacklist hay kh\u00f4ng.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section\t\thelp class=\"sc_fs_faq sc_card    \"\n\t\t\t\t>\n\t\t\t\t<h2 id=\"N\u00ean_s\u1eed_d\u1ee5ng_PTR_Record_\u0111\u1ec3_ki\u1ec3m_tra_email_hay_kh\u00f4ng?\">N\u00ean s\u1eed d\u1ee5ng PTR Record \u0111\u1ec3 ki\u1ec3m tra email hay kh\u00f4ng?<\/h2>\t\t\t\t<div>\n\t\t\t\t\t\t<div class=\"sc_fs_faq__content\">\n\t\t\t\t\n\n<p>C\u00f3. N\u1ebfu b\u1ea1n d\u1ef1 \u0111\u1ecbnh s\u1eed d\u1ee5ng PTR Record \u0111\u1ec3 ki\u1ec3m tra email c\u1ee7a m\u00ecnh g\u1eedi \u0111i c\u00f3 b\u1ecb ch\u1eb7n hay kh\u00f4ng, \u0111\u00e2y l\u00e0 m\u1ed9t \u00fd ki\u1ebfn h\u1ebft s\u1ee9c s\u00e1ng su\u1ed1t \u0111\u1ea5y! Nh\u1eefng b\u1ed9 l\u1ecdc email s\u1eed d\u1ee5ng PTR Record s\u1ebd ch\u1eb7n nh\u1eefng mi\u1ec1n ch\u1ee9a PTR Record kh\u00f4ng h\u1ee3p l\u1ec7, sai mi\u1ec1n v\u00e0 b\u00e1o c\u00e1o cho b\u1ea1n.<\/p>\n\n\n\n<p>Ch\u00ednh t\u1eeb vi\u1ec7c n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda l\u1ea1i thi\u1ebfu s\u00f3t d\u1ef1a tr\u00ean b\u00e1o c\u00e1o.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section\t\thelp class=\"sc_fs_faq sc_card    \"\n\t\t\t\t>\n\t\t\t\t<h2 id=\"PTR_Record_\u0111\u01b0\u1ee3c_l\u01b0u_tr\u1eef_th\u1ebf_n\u00e0o_trong_IPv6?\">PTR Record \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef th\u1ebf n\u00e0o trong IPv6?<\/h2>\t\t\t\t<div>\n\t\t\t\t\t\t<div class=\"sc_fs_faq__content\">\n\t\t\t\t\n\n<p>Kh\u00e1c v\u1edbi IPv4, trong IPv6, PTR Record \u1edf b\u00ean trong m\u1ed9t kh\u00f4ng gian kh\u00e1c b\u00ean trong .arpa. PTR Record IPv6 s\u1ebd b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c v\u00e0 chuy\u1ec3n \u0111\u1ed5i c\u00e1c th\u00e0nh ph\u1ea7n 4bit, c\u1ed9ng v\u1edbi &#8220;.ip6.arpa&#8221;.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section\t\thelp class=\"sc_fs_faq sc_card    \"\n\t\t\t\t>\n\t\t\t\t<h2 id=\"PTR_Record_m\u1ea5t_bao_l\u00e2u_\u0111\u1ec3_ghi_nh\u1eadn?\">PTR Record m\u1ea5t bao l\u00e2u \u0111\u1ec3 ghi nh\u1eadn?<\/h2>\t\t\t\t<div>\n\t\t\t\t\t\t<div class=\"sc_fs_faq__content\">\n\t\t\t\t\n\n<p>T\u00f9y thu\u1ed9c v\u00e0o gi\u00e1 tr\u1ecb <a href=\"https:\/\/tino.vn\/blog\/cname-la-gi\/#:~:text=TTL%20%C4%91%C6%B0%E1%BB%A3c%20vi%E1%BA%BFt%20t%E1%BA%AFt%20b%E1%BB%9Fi,gian%2C%20%C4%91%C6%B0%E1%BB%A3c%20t%C3%ADnh%20b%E1%BA%B1ng%20gi%C3%A2y.\" target=\"_blank\" rel=\"noreferrer noopener\">TTL <\/a>c\u1ee7a b\u1ea1n \u0111\u00e3 cho, gi\u00e1 tr\u1ecb c\u1ee7a PTR Record s\u1ebd d\u1ef1a tr\u00ean gi\u00e1 tr\u1ecb n\u00e0y.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\n<script type=\"application\/ld+json\">\n\t{\n\t\t\"@context\": \"https:\/\/schema.org\",\n\t\t\"@type\": \"FAQPage\",\n\t\t\"mainEntity\": [\n\t\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng PTR Record v\u00e0o m\u1ee5c \u0111\u00edch ch\u1ed1ng spam hay kh\u00f4ng?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"<p>C\u00f3. Hi\u1ec7n t\u1ea1i, c\u00f3 r\u1ea5t nhi\u1ec1u b\u1ed9 l\u1ecdc email, tin nh\u1eafn s\u1eed d\u1ee5ng PTR Record \u0111\u1ec3 ki\u1ec3m tra t\u00ean mi\u1ec1n v\u00e0 \u0111\u1ecba ch\u1ec9 email xem, li\u1ec7u nh\u1eefng email n\u00e0y c\u00f3 \u0111\u1ebfn t\u1eeb nh\u1eefng m\u00e1y ch\u1ee7 email h\u1ee3p ph\u00e1p, kh\u00f4ng n\u1eb1m trong blacklist hay kh\u00f4ng.<\/p>\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"N\u00ean s\u1eed d\u1ee5ng PTR Record \u0111\u1ec3 ki\u1ec3m tra email hay kh\u00f4ng?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"<p>C\u00f3. N\u1ebfu b\u1ea1n d\u1ef1 \u0111\u1ecbnh s\u1eed d\u1ee5ng PTR Record \u0111\u1ec3 ki\u1ec3m tra email c\u1ee7a m\u00ecnh g\u1eedi \u0111i c\u00f3 b\u1ecb ch\u1eb7n hay kh\u00f4ng, \u0111\u00e2y l\u00e0 m\u1ed9t \u00fd ki\u1ebfn h\u1ebft s\u1ee9c s\u00e1ng su\u1ed1t \u0111\u1ea5y! Nh\u1eefng b\u1ed9 l\u1ecdc email s\u1eed d\u1ee5ng PTR Record s\u1ebd ch\u1eb7n nh\u1eefng mi\u1ec1n ch\u1ee9a PTR Record kh\u00f4ng h\u1ee3p l\u1ec7, sai mi\u1ec1n v\u00e0 b\u00e1o c\u00e1o cho b\u1ea1n.<\/p><p>Ch\u00ednh t\u1eeb vi\u1ec7c n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda l\u1ea1i thi\u1ebfu s\u00f3t d\u1ef1a tr\u00ean b\u00e1o c\u00e1o.<\/p>\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"PTR Record \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef th\u1ebf n\u00e0o trong IPv6?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"<p>Kh\u00e1c v\u1edbi IPv4, trong IPv6, PTR Record \u1edf b\u00ean trong m\u1ed9t kh\u00f4ng gian kh\u00e1c b\u00ean trong .arpa. PTR Record IPv6 s\u1ebd b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c v\u00e0 chuy\u1ec3n \u0111\u1ed5i c\u00e1c th\u00e0nh ph\u1ea7n 4bit, c\u1ed9ng v\u1edbi \\\".ip6.arpa\\\".<\/p>\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"PTR Record m\u1ea5t bao l\u00e2u \u0111\u1ec3 ghi nh\u1eadn?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"<p>T\u00f9y thu\u1ed9c v\u00e0o gi\u00e1 tr\u1ecb <a>TTL <\/a>c\u1ee7a b\u1ea1n \u0111\u00e3 cho, gi\u00e1 tr\u1ecb c\u1ee7a PTR Record s\u1ebd d\u1ef1a tr\u00ean gi\u00e1 tr\u1ecb n\u00e0y.<\/p>\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t\t\t\t]\n\t}\n<\/script>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Gi\u1ed1ng nh\u01b0 m\u1ed9t b\u1ee9c th\u01b0 \u1edf b\u01b0u \u0111i\u1ec7n, DNS (h\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n) c\u1ea7n m\u1ed9t \u0111\u1ecba ch\u1ec9 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a m\u1ed9t trang web trong h\u1ec7 th\u1ed1ng Internet. \u0110\u00e2y l\u00e0 ch\u00eca kh\u00f3a ch\u1ee7 ch\u1ed1t c\u1ee7a c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng nh\u01b0 mail server, web server\u2026 DNS c\u00f3 r\u1ea5t nhi\u1ec1u th\u00e0nh ph\u1ea7n v\u1edbi nhi\u1ec1u b\u1ea3n [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":80097,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[6364],"class_list":["post-15730","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-kien-thuc-ten-mien"],"_links":{"self":[{"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/posts\/15730","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/comments?post=15730"}],"version-history":[{"count":1,"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/posts\/15730\/revisions"}],"predecessor-version":[{"id":114629,"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/posts\/15730\/revisions\/114629"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/media\/80097"}],"wp:attachment":[{"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/media?parent=15730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/categories?post=15730"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tino.vn\/blog\/wp-json\/wp\/v2\/tags?post=15730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}