{"id":27881,"date":"2025-06-02T14:30:52","date_gmt":"2025-06-02T07:30:52","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=27881"},"modified":"2025-06-24T09:10:00","modified_gmt":"2025-06-24T02:10:00","slug":"ipv4-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/","title":{"rendered":"IPv4 l\u00e0 g\u00ec? C\u1ea5u tr\u00fac, c\u00e1ch ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#IPv4-la-gi\" >IPv4 l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#Dia-chi-IPv4-co-cau-truc-nhu-the-nao\" >\u0110\u1ecba ch\u1ec9 IPv4 c\u00f3 c\u1ea5u tr\u00fac nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#IPv4-hoat-dong-nhu-the-nao\" >IPv4 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#Dau-la-mot-dia-chi-IPv4-hop-le\" >\u0110\u00e2u l\u00e0 m\u1ed9t \u0111\u1ecba ch\u1ec9 IPv4 h\u1ee3p l\u1ec7?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#Dia-chi-IPv4-co-may-loai\" >\u0110\u1ecba ch\u1ec9 IPv4 c\u00f3 m\u1ea5y lo\u1ea1i?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#IPv4-duoc-chia-thanh-may-lop\" >IPv4 \u0111\u01b0\u1ee3c chia th\u00e0nh m\u1ea5y l\u1edbp?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#IPv4-co-bao-nhieu-bit\" >IPv4 c\u00f3 bao nhi\u00eau bit?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#Nhung-ung-dung-cua-dia-chi-IPv4\" >Nh\u1eefng \u1ee9ng d\u1ee5ng c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#Co-nen-su-dung-IPv4-tren-VPS\" >C\u00f3 n\u00ean s\u1eed d\u1ee5ng IPv4 tr\u00ean VPS?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#Mot-so-cau-hoi-thuong-gap-ve-IPv4\" >M\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 IPv4<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#IPv4-va-IPv6-khac-nhau-nhu-the-nao\" >IPv4 v\u00e0 IPv6 kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#Lam-the-nao-de-tim-dia-chi-IPv4-cua-VPS\" >L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm \u0111\u1ecba ch\u1ec9 IPv4 c\u1ee7a VPS?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#Co-the-co-nhieu-dia-chi-IPv4-tren-mot-VPS-khong\" >C\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IPv4 tr\u00ean m\u1ed9t VPS kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/#IPv4-co-an-toan-khong\" >IPv4 c\u00f3 an to\u00e0n kh\u00f4ng?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>Qu\u1ea3n l\u00fd VPS hi\u1ec7u qu\u1ea3 \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 h\u1ea1 t\u1ea7ng m\u1ea1ng, trong \u0111\u00f3 <strong>IPv4<\/strong> \u0111\u00f3ng vai tr\u00f2 c\u1ef1c k\u1ef3 quan tr\u1ecdng. Giao th\u1ee9c n\u00e0y gi\u00fap \u0111\u1ecbnh danh v\u00e0 k\u1ebft n\u1ed1i m\u1ecdi thi\u1ebft b\u1ecb tr\u00ean Internet, \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u truy\u1ec1n t\u1ea3i th\u00f4ng su\u1ed1t. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o c\u1ea5u tr\u00fac, c\u00e1ch ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i \u0111\u1ecba ch\u1ec9 v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a IPv4, \u0111\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng m\u00e1y ch\u1ee7 \u1ea3o.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"IPv4-la-gi\"><\/span>IPv4 l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>IPv4<\/strong> (Internet Protocol version 4) l\u00e0 phi\u00ean b\u1ea3n th\u1ee9 t\u01b0 c\u1ee7a Giao th\u1ee9c Internet. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng giao th\u1ee9c c\u1ed1t l\u00f5i c\u1ee7a b\u1ed9 giao th\u1ee9c Internet, gi\u00fap nh\u1eadn d\u1ea1ng c\u00e1c thi\u1ebft b\u1ecb tr\u00ean m\u1ed9t m\u1ea1ng b\u1eb1ng m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u1ecba ch\u1ec9 duy nh\u1ea5t. Giao th\u1ee9c n\u00e0y ch\u1ecbu tr\u00e1ch nhi\u1ec7m \u0111\u1ecbnh tuy\u1ebfn h\u1ea7u h\u1ebft l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp tr\u00ean Internet hi\u1ec7n nay.<\/p>\n<p>IPv4 ra \u0111\u1eddi v\u00e0o \u0111\u1ea7u nh\u1eefng n\u0103m 1980 v\u00e0 \u0111\u00e3 tr\u1edf th\u00e0nh x\u01b0\u01a1ng s\u1ed1ng c\u1ee7a m\u1ea1ng l\u01b0\u1edbi to\u00e0n c\u1ea7u. M\u1eb7c d\u00f9 c\u00f3 phi\u00ean b\u1ea3n k\u1ebf nhi\u1ec7m (IPv6), IPv4 v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i. Vai tr\u00f2 ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn \u0111\u00fang \u0111\u00edch, b\u1ea5t k\u1ec3 kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/IPv4-la-gi.jpg\" alt=\"IPv4 l\u00e0 g\u00ec\" width=\"600\" height=\"400\" class=\"aligncenter wp-image-27885\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/IPv4-la-gi.jpg 750w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/IPv4-la-gi-300x200.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Dia-chi-IPv4-co-cau-truc-nhu-the-nao\"><\/span>\u0110\u1ecba ch\u1ec9 IPv4 c\u00f3 c\u1ea5u tr\u00fac nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ecba ch\u1ec9 IPv4 c\u00f3 c\u1ea5u tr\u00fac 32-bit, \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng b\u1ed1n s\u1ed1 th\u1eadp ph\u00e2n. C\u00e1c s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ch\u1ea5m, v\u00ed d\u1ee5: 192.168.1.1. M\u1ed7i s\u1ed1 trong d\u00e3y n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t &#8220;octet&#8221; v\u00e0 c\u00f3 gi\u00e1 tr\u1ecb t\u1eeb 0 \u0111\u1ebfn 255.<\/p>\n<p>M\u1ed7i octet t\u01b0\u01a1ng \u1ee9ng v\u1edbi 8 bit nh\u1ecb ph\u00e2n. Khi k\u1ebft h\u1ee3p 4 octet l\u1ea1i, ch\u00fang ta c\u00f3 t\u1ed5ng c\u1ed9ng 32 bit. C\u1ea5u tr\u00fac n\u00e0y cho ph\u00e9p t\u1ea1o ra kho\u1ea3ng 4,3 t\u1ef7 \u0111\u1ecba ch\u1ec9 duy nh\u1ea5t. V\u00ed d\u1ee5, \u0111\u1ecba ch\u1ec9 192.168.1.1 trong h\u1ec7 nh\u1ecb ph\u00e2n s\u1ebd l\u00e0 11000000.10101000.00000001.00000001.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cau-truc-IPv4.jpg\" alt=\"C\u1ea5u tr\u00fac IPv4\" width=\"600\" height=\"375\" class=\"aligncenter wp-image-27882\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cau-truc-IPv4.jpg 750w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/Cau-truc-IPv4-300x188.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"IPv4-hoat-dong-nhu-the-nao\"><\/span>IPv4 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IPv4 ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch g\u00e1n m\u1ed9t \u0111\u1ecba ch\u1ec9 duy nh\u1ea5t cho m\u1ed7i thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i Internet. Khi b\u1ea1n g\u1eedi d\u1eef li\u1ec7u t\u1eeb m\u00e1y t\u00ednh c\u1ee7a m\u00ecnh, d\u1eef li\u1ec7u \u0111\u00f3 \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c g\u00f3i nh\u1ecf. M\u1ed7i g\u00f3i ch\u1ee9a \u0111\u1ecba ch\u1ec9 IP ngu\u1ed3n v\u00e0 \u0111\u1ecba ch\u1ec9 IP \u0111\u00edch.<\/p>\n<p>C\u00e1c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn (router) tr\u00ean Internet s\u1ebd \u0111\u1ecdc \u0111\u1ecba ch\u1ec9 IP \u0111\u00edch c\u1ee7a t\u1eebng g\u00f3i. D\u1ef1a v\u00e0o th\u00f4ng tin n\u00e0y, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn s\u1ebd chuy\u1ec3n ti\u1ebfp g\u00f3i d\u1eef li\u1ec7u \u0111\u1ebfn m\u1ea1ng ti\u1ebfp theo, g\u1ea7n v\u1edbi \u0111\u00edch \u0111\u1ebfn h\u01a1n. Qu\u00e1 tr\u00ecnh n\u00e0y ti\u1ebfp t\u1ee5c cho \u0111\u1ebfn khi g\u00f3i tin \u0111\u1ebfn \u0111\u01b0\u1ee3c thi\u1ebft b\u1ecb nh\u1eadn cu\u1ed1i c\u00f9ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/IPv4.jpg\" alt=\"IPv4\" width=\"600\" height=\"337\" class=\"aligncenter size-full wp-image-29537\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/IPv4.jpg 600w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/IPv4-300x169.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Dau-la-mot-dia-chi-IPv4-hop-le\"><\/span>\u0110\u00e2u l\u00e0 m\u1ed9t \u0111\u1ecba ch\u1ec9 IPv4 h\u1ee3p l\u1ec7?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ed9t \u0111\u1ecba ch\u1ec9 IPv4 h\u1ee3p l\u1ec7 ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc c\u1ee5 th\u1ec3. \u0110\u1ecba ch\u1ec9 n\u00e0y bao g\u1ed3m b\u1ed1n s\u1ed1 th\u1eadp ph\u00e2n, m\u1ed7i s\u1ed1 n\u1eb1m trong kho\u1ea3ng t\u1eeb 0 \u0111\u1ebfn 255. V\u00ed d\u1ee5, 192.168.1.1 l\u00e0 m\u1ed9t \u0111\u1ecba ch\u1ec9 h\u1ee3p l\u1ec7.<\/p>\n<p>\u0110\u1ecba ch\u1ec9 256.0.0.1 kh\u00f4ng h\u1ee3p l\u1ec7 v\u00ec s\u1ed1 \u0111\u1ea7u ti\u00ean v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n 255. T\u01b0\u01a1ng t\u1ef1, 192.1668.1.1 c\u0169ng kh\u00f4ng h\u1ee3p l\u1ec7 do s\u1ed1 th\u1ee9 hai c\u00f3 ba ch\u1eef s\u1ed1 v\u00e0 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n 255. Vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng \u0111\u1ecbnh tuy\u1ebfn.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Dia-chi-IPv4-co-may-loai\"><\/span>\u0110\u1ecba ch\u1ec9 IPv4 c\u00f3 m\u1ea5y lo\u1ea1i?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ecba ch\u1ec9 IPv4 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh hai lo\u1ea1i ch\u00ednh: <strong>\u0110\u1ecba ch\u1ec9 c\u00f4ng c\u1ed9ng (Public IP Address)<\/strong> v\u00e0 <strong>\u0110\u1ecba ch\u1ec9 ri\u00eang t\u01b0 (Private IP Address)<\/strong>. M\u1ed7i lo\u1ea1i ph\u1ee5c v\u1ee5 m\u1ed9t m\u1ee5c \u0111\u00edch kh\u00e1c nhau trong h\u1ec7 th\u1ed1ng m\u1ea1ng.<\/p>\n<p><strong>\u0110\u1ecba ch\u1ec9 c\u00f4ng c\u1ed9ng<\/strong> l\u00e0 \u0111\u1ecba ch\u1ec9 duy nh\u1ea5t tr\u00ean Internet to\u00e0n c\u1ea7u. C\u00e1c m\u00e1y ch\u1ee7 web, email server, v\u00e0 c\u00e1c thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp Internet \u0111\u1ec1u c\u1ea7n m\u1ed9t \u0111\u1ecba ch\u1ec9 c\u00f4ng c\u1ed9ng \u0111\u1ec3 c\u00f3 th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c t\u1eeb b\u00ean ngo\u00e0i m\u1ea1ng c\u1ee5c b\u1ed9. InterData cung c\u1ea5p c\u00e1c \u0111\u1ecba ch\u1ec9 IP c\u00f4ng c\u1ed9ng cho c\u00e1c d\u1ecbch v\u1ee5 VPS, \u0111\u1ea3m b\u1ea3o m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n lu\u00f4n c\u00f3 th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c.<\/p>\n<p><strong>\u0110\u1ecba ch\u1ec9 ri\u00eang t\u01b0<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ng n\u1ed9i b\u1ed9, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ea1ng gia \u0111\u00ecnh ho\u1eb7c m\u1ea1ng v\u0103n ph\u00f2ng. C\u00e1c \u0111\u1ecba ch\u1ec9 n\u00e0y kh\u00f4ng th\u1ec3 truy c\u1eadp tr\u1ef1c ti\u1ebfp t\u1eeb Internet. Ba d\u1ea3i \u0111\u1ecba ch\u1ec9 ph\u1ed5 bi\u1ebfn d\u00e0nh cho IP ri\u00eang t\u01b0 l\u00e0:<\/p>\n<ul>\n<li>10.0.0.0 \u0111\u1ebfn 10.255.255.255<\/li>\n<li>172.16.0.0 \u0111\u1ebfn 172.31.255.255<\/li>\n<li>192.168.0.0 \u0111\u1ebfn 192.168.255.255<\/li>\n<\/ul>\n<p>C\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng ri\u00eang t\u01b0 c\u00f3 th\u1ec3 giao ti\u1ebfp v\u1edbi nhau b\u1eb1ng c\u00e1c \u0111\u1ecba ch\u1ec9 n\u00e0y. \u0110\u1ec3 truy c\u1eadp Internet, ch\u00fang th\u01b0\u1eddng s\u1eed d\u1ee5ng m\u1ed9t thi\u1ebft b\u1ecb NAT (Network Address Translation) \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i \u0111\u1ecba ch\u1ec9 ri\u00eang t\u01b0 th\u00e0nh \u0111\u1ecba ch\u1ec9 c\u00f4ng c\u1ed9ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/IPv4-hinh1.jpg\" alt=\"IPv4\" width=\"600\" height=\"337\" class=\"aligncenter size-full wp-image-29535\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/IPv4-hinh1.jpg 600w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/06\/IPv4-hinh1-300x169.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"IPv4-duoc-chia-thanh-may-lop\"><\/span>IPv4 \u0111\u01b0\u1ee3c chia th\u00e0nh m\u1ea5y l\u1edbp?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IPv4 \u0111\u01b0\u1ee3c chia th\u00e0nh n\u0103m l\u1edbp ch\u00ednh: <strong>L\u1edbp A, L\u1edbp B, L\u1edbp C, L\u1edbp D v\u00e0 L\u1edbp E<\/strong>. Vi\u1ec7c ph\u00e2n l\u1edbp n\u00e0y gi\u00fap t\u1ed5 ch\u1ee9c v\u00e0 qu\u1ea3n l\u00fd kh\u00f4ng gian \u0111\u1ecba ch\u1ec9 IP hi\u1ec7u qu\u1ea3 h\u01a1n. Tuy nhi\u00ean, h\u1ec7 th\u1ed1ng ph\u00e2n l\u1edbp n\u00e0y \u0111\u00e3 ph\u1ea7n n\u00e0o \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng CIDR (Classless Inter-Domain Routing).<\/p>\n<ul>\n<li><strong>L\u1edbp A:<\/strong> D\u00e0nh cho c\u00e1c m\u1ea1ng r\u1ea5t l\u1edbn. Byte \u0111\u1ea7u ti\u00ean c\u1ee7a \u0111\u1ecba ch\u1ec9 b\u1eaft \u0111\u1ea7u b\u1eb1ng 0. V\u00ed d\u1ee5: 1.0.0.0 \u0111\u1ebfn 126.255.255.255. L\u1edbp n\u00e0y h\u1ed7 tr\u1ee3 s\u1ed1 l\u01b0\u1ee3ng l\u1edbn m\u00e1y ch\u1ee7 tr\u00ean m\u1ed7i m\u1ea1ng.<\/li>\n<li><strong>L\u1edbp B:<\/strong> D\u00e0nh cho c\u00e1c m\u1ea1ng c\u1ee1 trung b\u00ecnh \u0111\u1ebfn l\u1edbn. Hai byte \u0111\u1ea7u ti\u00ean c\u1ee7a \u0111\u1ecba ch\u1ec9 b\u1eaft \u0111\u1ea7u b\u1eb1ng 10. V\u00ed d\u1ee5: 128.0.0.0 \u0111\u1ebfn 191.255.255.255.<\/li>\n<li><strong>L\u1edbp C:<\/strong> D\u00e0nh cho c\u00e1c m\u1ea1ng nh\u1ecf. Ba byte \u0111\u1ea7u ti\u00ean c\u1ee7a \u0111\u1ecba ch\u1ec9 b\u1eaft \u0111\u1ea7u b\u1eb1ng 110. V\u00ed d\u1ee5: 192.0.0.0 \u0111\u1ebfn 223.255.255.255. L\u1edbp n\u00e0y ph\u1ed5 bi\u1ebfn cho m\u1ea1ng gia \u0111\u00ecnh v\u00e0 v\u0103n ph\u00f2ng nh\u1ecf.<\/li>\n<li><strong>L\u1edbp D:<\/strong> D\u00e0nh cho \u0111\u1ecba ch\u1ec9 \u0111a h\u01b0\u1edbng (multicast). C\u00e1c \u0111\u1ecba ch\u1ec9 n\u00e0y b\u1eaft \u0111\u1ea7u b\u1eb1ng 1110. V\u00ed d\u1ee5: 224.0.0.0 \u0111\u1ebfn 239.255.255.255. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn m\u1ed9t nh\u00f3m c\u00e1c m\u00e1y ch\u1ee7 c\u00f9ng l\u00fac.<\/li>\n<li><strong>L\u1edbp E:<\/strong> D\u00e0nh cho m\u1ee5c \u0111\u00edch nghi\u00ean c\u1ee9u v\u00e0 th\u1eed nghi\u1ec7m. C\u00e1c \u0111\u1ecba ch\u1ec9 n\u00e0y b\u1eaft \u0111\u1ea7u b\u1eb1ng 1111. V\u00ed d\u1ee5: 240.0.0.0 \u0111\u1ebfn 255.255.255.255. Ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean Internet c\u00f4ng c\u1ed9ng.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"IPv4-co-bao-nhieu-bit\"><\/span>IPv4 c\u00f3 bao nhi\u00eau bit?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ecba ch\u1ec9 IPv4 c\u00f3 t\u1ed5ng c\u1ed9ng <strong>32 bit<\/strong>. M\u1ed7i bit l\u00e0 m\u1ed9t s\u1ed1 nh\u1ecb ph\u00e2n (0 ho\u1eb7c 1). V\u1edbi 32 bit, IPv4 c\u00f3 th\u1ec3 t\u1ea1o ra 232 \u0111\u1ecba ch\u1ec9 duy nh\u1ea5t. \u0110i\u1ec1u n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi kho\u1ea3ng 4.294.967.296 \u0111\u1ecba ch\u1ec9.<\/p>\n<p>S\u1ed1 l\u01b0\u1ee3ng \u0111\u1ecba ch\u1ec9 n\u00e0y ban \u0111\u1ea7u \u0111\u01b0\u1ee3c xem l\u00e0 r\u1ea5t l\u1edbn. Tuy nhi\u00ean, v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n b\u00f9ng n\u1ed5 c\u1ee7a Internet v\u00e0 s\u1ed1 l\u01b0\u1ee3ng thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i t\u0103ng nhanh ch\u00f3ng, s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ecba ch\u1ec9 IPv4 \u0111\u00e3 g\u1ea7n c\u1ea1n ki\u1ec7t. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 th\u00fac \u0111\u1ea9y s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a IPv6.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Nhung-ung-dung-cua-dia-chi-IPv4\"><\/span>Nh\u1eefng \u1ee9ng d\u1ee5ng c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ecba ch\u1ec9 IPv4 l\u00e0 n\u1ec1n t\u1ea3ng cho nhi\u1ec1u \u1ee9ng d\u1ee5ng v\u00e0 d\u1ecbch v\u1ee5 tr\u00ean Internet. Vai tr\u00f2 c\u1ee7a n\u00f3 r\u1ea5t \u0111a d\u1ea1ng, \u0111\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng m\u00e1y ch\u1ee7 v\u00e0 d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn.<\/p>\n<ol>\n<li><strong>Hosting website:<\/strong> M\u1ed7i website c\u1ea7n m\u1ed9t \u0111\u1ecba ch\u1ec9 IP \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 truy c\u1eadp. VPS s\u1eed d\u1ee5ng IPv4 \u0111\u1ec3 hosting c\u00e1c trang web, gi\u00fap ch\u00fang c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb tr\u1ef1c tuy\u1ebfn.<\/li>\n<li><strong>M\u00e1y ch\u1ee7 tr\u00f2 ch\u01a1i (Gaming servers):<\/strong> C\u00e1c game th\u1ee7 k\u1ebft n\u1ed1i \u0111\u1ebfn m\u00e1y ch\u1ee7 tr\u00f2 ch\u01a1i th\u00f4ng qua \u0111\u1ecba ch\u1ec9 IPv4 c\u1ee7a m\u00e1y ch\u1ee7 \u0111\u00f3. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o tr\u1ea3i nghi\u1ec7m ch\u01a1i game \u1ed5n \u0111\u1ecbnh v\u00e0 \u00edt \u0111\u1ed9 tr\u1ec5.<\/li>\n<li><strong>M\u00e1y ch\u1ee7 email (Email servers):<\/strong> C\u00e1c m\u00e1y ch\u1ee7 email s\u1eed d\u1ee5ng IPv4 \u0111\u1ec3 g\u1eedi v\u00e0 nh\u1eadn th\u01b0 \u0111i\u1ec7n t\u1eed. \u0110\u1ecba ch\u1ec9 IP gi\u00fap x\u00e1c \u0111\u1ecbnh ngu\u1ed3n g\u1ed1c v\u00e0 \u0111\u00edch \u0111\u1ebfn c\u1ee7a email.<\/li>\n<li><strong>Truy c\u1eadp t\u1eeb xa (Remote access):<\/strong> Ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i t\u1eeb xa \u0111\u1ebfn m\u00e1y ch\u1ee7 VPS ho\u1eb7c m\u00e1y t\u00ednh c\u00e1 nh\u00e2n th\u00f4ng qua \u0111\u1ecba ch\u1ec9 IPv4. \u0110i\u1ec1u n\u00e0y r\u1ea5t h\u1eefu \u00edch cho qu\u1ea3n tr\u1ecb vi\u00ean h\u1ec7 th\u1ed1ng.<\/li>\n<li><strong>VPN (Virtual Private Network):<\/strong> C\u00e1c d\u1ecbch v\u1ee5 VPN s\u1eed d\u1ee5ng IPv4 \u0111\u1ec3 t\u1ea1o \u0111\u01b0\u1eddng h\u1ea7m b\u1ea3o m\u1eadt. Khi k\u1ebft n\u1ed1i VPN, \u0111\u1ecba ch\u1ec9 IP th\u1ef1c c\u1ee7a b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7 VPN.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/ipv4-02.jpg\" alt=\"ipv4 02\" width=\"600\" height=\"400\" class=\"aligncenter wp-image-27884\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/ipv4-02.jpg 750w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/05\/ipv4-02-300x200.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Co-nen-su-dung-IPv4-tren-VPS\"><\/span>C\u00f3 n\u00ean s\u1eed d\u1ee5ng IPv4 tr\u00ean VPS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng IPv4 tr\u00ean VPS hi\u1ec7n nay v\u1eabn l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn, m\u1eb7c d\u00f9 kh\u00f4ng gian \u0111\u1ecba ch\u1ec9 \u0111ang c\u1ea1n ki\u1ec7t. Nhi\u1ec1u h\u1ec7 th\u1ed1ng c\u0169 v\u00e0 \u1ee9ng d\u1ee5ng v\u1eabn y\u00eau c\u1ea7u IPv4 \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng. InterData cung c\u1ea5p c\u00e1c g\u00f3i VPS k\u00e8m theo \u0111\u1ecba ch\u1ec9 IPv4 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch.<\/p>\n<p>\u01afu \u0111i\u1ec3m ch\u00ednh c\u1ee7a IPv4 l\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch r\u1ed9ng r\u00e3i. H\u1ea7u h\u1ebft c\u00e1c website, \u1ee9ng d\u1ee5ng v\u00e0 thi\u1ebft b\u1ecb m\u1ea1ng v\u1eabn h\u1ed7 tr\u1ee3 IPv4. \u0110i\u1ec1u n\u00e0y gi\u00fap vi\u1ec7c tri\u1ec3n khai v\u00e0 qu\u1ea3n l\u00fd VPS tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u.<\/p>\n<p>Tuy nhi\u00ean, nh\u01b0\u1ee3c \u0111i\u1ec3m l\u1edbn nh\u1ea5t l\u00e0 s\u1ef1 khan hi\u1ebfm \u0111\u1ecba ch\u1ec9. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn chi ph\u00ed cao h\u01a1n ho\u1eb7c kh\u00f3 kh\u0103n trong vi\u1ec7c m\u1edf r\u1ed9ng quy m\u00f4. M\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p \u0111\u00e3 b\u1eaft \u0111\u1ea7u t\u00ednh ph\u00ed cho m\u1ed7i \u0111\u1ecba ch\u1ec9 IPv4 b\u1ed5 sung.<\/p>\n<p>Trong t\u01b0\u01a1ng lai, IPv6 s\u1ebd d\u1ea7n thay th\u1ebf IPv4. Tuy nhi\u00ean, qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i n\u00e0y \u0111ang di\u1ec5n ra ch\u1eadm ch\u1ea1p. V\u00ec v\u1eady, vi\u1ec7c s\u1eed d\u1ee5ng IPv4 tr\u00ean VPS v\u1eabn c\u1ea7n thi\u1ebft trong nhi\u1ec1u n\u0103m t\u1edbi. N\u1ebfu b\u1ea1n \u0111ang c\u00e2n nh\u1eafc, h\u00e3y \u0111\u1ea3m b\u1ea3o nh\u00e0 cung c\u1ea5p VPS c\u1ee7a m\u00ecnh c\u00f3 \u0111\u1ee7 ngu\u1ed3n l\u1ef1c IPv4.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Mot-so-cau-hoi-thuong-gap-ve-IPv4\"><\/span>M\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 IPv4<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"IPv4-va-IPv6-khac-nhau-nhu-the-nao\"><\/span>IPv4 v\u00e0 IPv6 kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>IPv4 v\u00e0 IPv6 l\u00e0 hai phi\u00ean b\u1ea3n c\u1ee7a Giao th\u1ee9c Internet, c\u00f3 nh\u1eefng kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 dung l\u01b0\u1ee3ng.<\/p>\n<ul>\n<li><strong>\u0110\u1ed9 d\u00e0i \u0111\u1ecba ch\u1ec9:<\/strong> IPv4 s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 32-bit, trong khi IPv6 s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 128-bit. \u0110i\u1ec1u n\u00e0y gi\u00fap IPv6 cung c\u1ea5p m\u1ed9t l\u01b0\u1ee3ng \u0111\u1ecba ch\u1ec9 kh\u1ed5ng l\u1ed3 (2128), gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 c\u1ea1n ki\u1ec7t c\u1ee7a IPv4.<\/li>\n<li><strong>Bi\u1ec3u di\u1ec5n:<\/strong> IPv4 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng c\u00e1c s\u1ed1 th\u1eadp ph\u00e2n ph\u00e2n t\u00e1ch b\u1edfi d\u1ea5u ch\u1ea5m (v\u00ed d\u1ee5: 192.168.1.1). IPv6 s\u1eed d\u1ee5ng c\u00e1c s\u1ed1 th\u1eadp l\u1ee5c ph\u00e2n ph\u00e2n t\u00e1ch b\u1edfi d\u1ea5u hai ch\u1ea5m (v\u00ed d\u1ee5: 2001:0db8:85a3:0000:0000:8a2e:0370:7334).<\/li>\n<li><strong>T\u00ednh n\u0103ng:<\/strong> IPv6 c\u00f3 nhi\u1ec1u t\u00ednh n\u0103ng n\u00e2ng cao h\u01a1n nh\u01b0 c\u1ea5u h\u00ecnh t\u1ef1 \u0111\u1ed9ng, b\u1ea3o m\u1eadt t\u00edch h\u1ee3p (IPsec), v\u00e0 kh\u1ea3 n\u0103ng x\u1eed l\u00fd g\u00f3i tin hi\u1ec7u qu\u1ea3 h\u01a1n.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Lam-the-nao-de-tim-dia-chi-IPv4-cua-VPS\"><\/span>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm \u0111\u1ecba ch\u1ec9 IPv4 c\u1ee7a VPS?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm \u0111\u1ecba ch\u1ec9 IPv4 c\u1ee7a VPS th\u00f4ng qua m\u1ed9t s\u1ed1 c\u00e1ch:<\/p>\n<ul>\n<li><strong>B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n qu\u1ea3n l\u00fd VPS:<\/strong> H\u1ea7u h\u1ebft c\u00e1c nh\u00e0 cung c\u1ea5p VPS, bao g\u1ed3m InterData, \u0111\u1ec1u hi\u1ec3n th\u1ecb \u0111\u1ecba ch\u1ec9 IP ch\u00ednh c\u1ee7a VPS tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n. B\u1ea1n ch\u1ec9 c\u1ea7n \u0111\u0103ng nh\u1eadp v\u00e0 t\u00ecm th\u00f4ng tin chi ti\u1ebft v\u1ec1 m\u00e1y ch\u1ee7 c\u1ee7a m\u00ecnh.<\/li>\n<li><strong>L\u1ec7nh SSH:<\/strong> K\u1ebft n\u1ed1i v\u00e0o VPS qua SSH v\u00e0 s\u1eed d\u1ee5ng c\u00e1c l\u1ec7nh nh\u01b0 <code>ip a<\/code> (tr\u00ean Linux) ho\u1eb7c <code>ifconfig<\/code> (tr\u00ean m\u1ed9t s\u1ed1 h\u1ec7 th\u1ed1ng c\u0169 h\u01a1n). L\u1ec7nh n\u00e0y s\u1ebd hi\u1ec3n th\u1ecb t\u1ea5t c\u1ea3 c\u00e1c c\u1ea5u h\u00ecnh m\u1ea1ng, bao g\u1ed3m \u0111\u1ecba ch\u1ec9 IPv4.<\/li>\n<li><strong>Email x\u00e1c nh\u1eadn d\u1ecbch v\u1ee5:<\/strong> Khi b\u1ea1n \u0111\u0103ng k\u00fd VPS, nh\u00e0 cung c\u1ea5p th\u01b0\u1eddng g\u1eedi email ch\u1ee9a th\u00f4ng tin \u0111\u0103ng nh\u1eadp v\u00e0 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a VPS.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Co-the-co-nhieu-dia-chi-IPv4-tren-mot-VPS-khong\"><\/span>C\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IPv4 tr\u00ean m\u1ed9t VPS kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00f3, m\u1ed9t VPS ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IPv4. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>IP ph\u1ee5 (Additional IP)<\/strong> ho\u1eb7c <strong>Multi-IP<\/strong>.<\/p>\n<ul>\n<li><strong>M\u1ee5c \u0111\u00edch:<\/strong> Vi\u1ec7c c\u00f3 nhi\u1ec1u IP ph\u1ee5 r\u1ea5t h\u1eefu \u00edch cho c\u00e1c m\u1ee5c \u0111\u00edch nh\u01b0: hosting nhi\u1ec1u website tr\u00ean c\u00f9ng m\u1ed9t VPS m\u00e0 m\u1ed7i website c\u00f3 IP ri\u00eang, ch\u1ea1y c\u00e1c d\u1ecbch v\u1ee5 y\u00eau c\u1ea7u IP \u0111\u1ed9c l\u1eadp, ho\u1eb7c c\u1ea5u h\u00ecnh SSL cho t\u1eebng t\u00ean mi\u1ec1n.<\/li>\n<li><strong>C\u00e1ch th\u1ee9c:<\/strong> B\u1ea1n th\u01b0\u1eddng c\u00f3 th\u1ec3 y\u00eau c\u1ea7u th\u00eam \u0111\u1ecba ch\u1ec9 IP t\u1eeb nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 VPS c\u1ee7a m\u00ecnh. InterData cung c\u1ea5p t\u00f9y ch\u1ecdn n\u00e0y cho c\u00e1c kh\u00e1ch h\u00e0ng c\u00f3 nhu c\u1ea7u m\u1edf r\u1ed9ng. Sau khi \u0111\u01b0\u1ee3c c\u1ea5p, b\u1ea1n c\u1ea7n c\u1ea5u h\u00ecnh c\u00e1c IP n\u00e0y tr\u00ean h\u1ec7 \u0111i\u1ec1u h\u00e0nh c\u1ee7a VPS.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"IPv4-co-an-toan-khong\"><\/span>IPv4 c\u00f3 an to\u00e0n kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ea3n th\u00e2n giao th\u1ee9c IPv4 kh\u00f4ng tr\u1ef1c ti\u1ebfp cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng b\u1ea3o m\u1eadt t\u00edch h\u1ee3p. Vi\u1ec7c b\u1ea3o m\u1eadt ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c l\u1edbp giao th\u1ee9c kh\u00e1c v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt \u0111\u01b0\u1ee3c tri\u1ec3n khai tr\u00ean h\u1ec7 th\u1ed1ng.<\/p>\n<ul>\n<li><strong>Nguy c\u01a1:<\/strong> IPv4 d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng nh\u01b0 DDoS, nghe l\u00e9n, gi\u1ea3 m\u1ea1o IP n\u1ebfu kh\u00f4ng c\u00f3 c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng v\u1ec7.<\/li>\n<li><strong>Gi\u1ea3i ph\u00e1p:<\/strong> \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n cho VPS s\u1eed d\u1ee5ng IPv4, b\u1ea1n c\u1ea7n tri\u1ec3n khai t\u01b0\u1eddng l\u1eeda (firewall), s\u1eed d\u1ee5ng VPN, c\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m th\u01b0\u1eddng xuy\u00ean, v\u00e0 c\u1ea5u h\u00ecnh c\u00e1c d\u1ecbch v\u1ee5 b\u1ea3o m\u1eadt kh\u00e1c. IPv6 c\u00f3 t\u00edch h\u1ee3p IPsec (IP Security) gi\u00fap t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt \u1edf c\u1ea5p \u0111\u1ed9 giao th\u1ee9c, \u0111i\u1ec1u m\u00e0 IPv4 kh\u00f4ng c\u00f3 s\u1eb5n.<\/li>\n<\/ul>\n<p>Tham kh\u1ea3o d\u1ecbch v\u1ee5 <a href=\"https:\/\/interdata.vn\/thue-vps\/\">thu\u00ea VPS gi\u00e1 r\u1ebb &#8211; Mi\u1ec5n ph\u00ed IPv4 ri\u00eang<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qu\u1ea3n l\u00fd VPS hi\u1ec7u qu\u1ea3 \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 h\u1ea1 t\u1ea7ng m\u1ea1ng, trong \u0111\u00f3 IPv4 \u0111\u00f3ng vai tr\u00f2 c\u1ef1c k\u1ef3 quan tr\u1ecdng. Giao th\u1ee9c n\u00e0y gi\u00fap \u0111\u1ecbnh danh v\u00e0 k\u1ebft n\u1ed1i m\u1ecdi thi\u1ebft b\u1ecb tr\u00ean Internet, \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u truy\u1ec1n t\u1ea3i th\u00f4ng su\u1ed1t. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o<\/p>\n","protected":false},"author":2,"featured_media":27885,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[151],"tags":[],"class_list":["post-27881","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mang"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/27881","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=27881"}],"version-history":[{"count":4,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/27881\/revisions"}],"predecessor-version":[{"id":29545,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/27881\/revisions\/29545"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/27885"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=27881"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=27881"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=27881"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}