{"id":32953,"date":"2025-09-06T09:22:01","date_gmt":"2025-09-06T02:22:01","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=32953"},"modified":"2025-09-06T09:23:55","modified_gmt":"2025-09-06T02:23:55","slug":"arp-spoofing-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/","title":{"rendered":"ARP Spoofing l\u00e0 g\u00ec? H\u1eadu qu\u1ea3, C\u00e1ch ph\u00e1t hi\u1ec7n v\u00e0 ph\u00f2ng ch\u1ed1ng hi\u1ec7u qu\u1ea3"},"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\/arp-spoofing-la-gi\/#ARP-Protocol-la-gi\" >ARP Protocol l\u00e0 g\u00ec?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Tam-quan-trong-cua-giao-thuc-ARP\" >T\u1ea7m quan tr\u1ecdng c\u1ee7a giao th\u1ee9c ARP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Cac-loai-giao-thuc-ARP\" >C\u00e1c lo\u1ea1i giao th\u1ee9c ARP<\/a><\/li><\/ul><\/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\/arp-spoofing-la-gi\/#ARP-Spoofing-la-gi\" >ARP Spoofing 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-5\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Co-che-tan-cong-ARP-Spoofing-dien-ra-nhu-the-nao\" >C\u01a1 ch\u1ebf t\u1ea5n c\u00f4ng ARP Spoofing di\u1ec5n ra nh\u01b0 th\u1ebf n\u00e0o?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#1-Quet-mang-Scanning\" >1. Qu\u00e9t m\u1ea1ng (Scanning)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#2-Gia-mao-ARP-ARP-Spoofing\" >2. Gi\u1ea3 m\u1ea1o ARP (ARP Spoofing)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#3-Chan-va-can-thiep-luu-luong-Traffic-Interception\" >3. Ch\u1eb7n v\u00e0 can thi\u1ec7p l\u01b0u l\u01b0\u1ee3ng (Traffic Interception)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#4-Chuyen-tiep-goi-tin-tuy-chon-%E2%80%93-Packet-Forwarding\" >4. Chuy\u1ec3n ti\u1ebfp g\u00f3i tin (t\u00f9y ch\u1ecdn \u2013 Packet Forwarding)<\/a><\/li><\/ul><\/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\/arp-spoofing-la-gi\/#Cac-dau-hieu-nhan-biet-cua-tan-cong-ARP-Spoofing\" >C\u00e1c d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft c\u1ee7a t\u1ea5n c\u00f4ng ARP Spoofing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Hau-qua-va-rui-ro-cua-tan-cong-ARP-Spoofing\" >H\u1eadu qu\u1ea3 v\u00e0 r\u1ee7i ro c\u1ee7a t\u1ea5n c\u00f4ng ARP Spoofing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Cac-dang-tan-cong-ARP-Spoofing\" >C\u00e1c d\u1ea1ng t\u1ea5n c\u00f4ng ARP Spoofing<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#1-ARP-Spoofing-co-ban\" >1. ARP Spoofing c\u01a1 b\u1ea3n<\/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\/arp-spoofing-la-gi\/#2-ARP-Spoofing-kieu-Man-in-the-Middle-MitM\" >2. ARP Spoofing ki\u1ec3u Man-in-the-Middle (MitM)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#3-ARP-Flooding-Tan-cong-tu-choi-dich-vu-%E2%80%93-DoS\" >3. ARP Flooding (T\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 \u2013 DoS)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#4-ARP-Cache-Poisoning\" >4. ARP Cache Poisoning<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#So-sanh-ARP-spoofing-voi-DNS-spoofing\" >So s\u00e1nh ARP spoofing v\u1edbi DNS spoofing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Ai-la-nguoi-thuc-hien-cac-cuoc-tan-cong-ARP-Spoofing\" >Ai l\u00e0 ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ARP Spoofing?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Cach-phat-hien-mot-cuoc-tan-cong-ARP-Cache-Poisoning\" >C\u00e1ch ph\u00e1t hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng ARP Cache Poisoning<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#1-Giam-sat-ARP-ARP-Monitoring\" >1. Gi\u00e1m s\u00e1t ARP (ARP Monitoring)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#2-Phat-hien-Gratuitous-ARP-Gratuitous-ARP-Detection\" >2. Ph\u00e1t hi\u1ec7n Gratuitous ARP (Gratuitous ARP Detection)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#3-Phan-tich-luu-luong-Traffic-Analysis\" >3. Ph\u00e2n t\u00edch l\u01b0u l\u01b0\u1ee3ng (Traffic Analysis)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Cach-phong-chong-tan-cong-ARP-Spoofing-hieu-qua\" >C\u00e1ch ph\u00f2ng ch\u1ed1ng t\u1ea5n c\u00f4ng ARP Spoofing hi\u1ec7u qu\u1ea3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Doi-voi-nguoi-dung-ca-nhan\" >\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng c\u00e1 nh\u00e2n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Doi-voi-Quan-tri-vien-mang\" >\u0110\u1ed1i v\u1edbi Qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/arp-spoofing-la-gi\/#Cac-cong-cu-ho-tro-phat-hien-tan-cong-ARP-Spoofing\" >C\u00e1c c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 ph\u00e1t hi\u1ec7n t\u1ea5n c\u00f4ng ARP Spoofing<\/a><\/li><\/ul><\/nav><\/div>\n<p>Trong m\u1ea1ng m\u00e1y t\u00ednh, c\u00f3 nh\u1eefng m\u1ed1i \u0111e d\u1ecda th\u1ea7m l\u1eb7ng nh\u01b0ng l\u1ea1i c\u1ef1c k\u1ef3 nguy hi\u1ec3m. M\u1ed9t trong s\u1ed1 \u0111\u00f3 l\u00e0 t\u1ea5n c\u00f4ng ARP Spoofing, hay c\u00f2n g\u1ecdi l\u00e0 ARP poisoning. T\u1ea5n c\u00f4ng n\u00e0y c\u00f3 th\u1ec3 bi\u1ebfn m\u1ed9t m\u1ea1ng n\u1ed9i b\u1ed9 t\u01b0\u1edfng ch\u1eebng an to\u00e0n tr\u1edf th\u00e0nh m\u1ed9t b\u1eaby r\u00ecnh r\u1eadp, n\u01a1i m\u1ecdi d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n \u0111\u1ec1u c\u00f3 th\u1ec3 b\u1ecb \u0111\u00e1nh c\u1eafp. C\u00f9ng InterData t\u00ecm hi\u1ec3u r\u00f5 <strong>ARP Spoofing l\u00e0 g\u00ec<\/strong>, c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, h\u1eadu qu\u1ea3 v\u00e0 trang b\u1ecb nh\u1eefng ki\u1ebfn th\u1ee9c c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng c\u1ee7a m\u00ecnh.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"ARP-Protocol-la-gi\"><\/span>ARP Protocol l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u v\u1ec1 t\u1ea5n c\u00f4ng ARP Spoofing, ch\u00fang ta c\u1ea7n n\u1eafm v\u1eefng m\u1ed9t giao th\u1ee9c n\u1ec1n t\u1ea3ng: <strong>ARP<\/strong> (Address Resolution Protocol). V\u1ec1 c\u01a1 b\u1ea3n, ARP c\u00f3 vai tr\u00f2 nh\u01b0 m\u1ed9t &#8220;b\u1ea3n \u0111\u1ed3&#8221; n\u1ed9i b\u1ed9. M\u1ed7i thi\u1ebft b\u1ecb trong m\u1ea1ng c\u1ee5c b\u1ed9 (LAN) \u0111\u1ec1u c\u00f3 hai lo\u1ea1i \u0111\u1ecba ch\u1ec9: \u0111\u1ecba ch\u1ec9 IP (d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh thi\u1ebft b\u1ecb \u1edf l\u1edbp m\u1ea1ng) v\u00e0 \u0111\u1ecba ch\u1ec9 MAC (\u0111\u1ecba ch\u1ec9 v\u1eadt l\u00fd duy nh\u1ea5t c\u1ee7a thi\u1ebft b\u1ecb). <strong>Giao th\u1ee9c ARP<\/strong> gi\u00fap c\u00e1c thi\u1ebft b\u1ecb t\u00ecm th\u1ea5y nhau b\u1eb1ng c\u00e1ch chuy\u1ec3n \u0111\u1ed5i \u0111\u1ecba ch\u1ec9 IP th\u00e0nh \u0111\u1ecba ch\u1ec9 MAC t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<p>V\u00ed d\u1ee5, khi m\u00e1y t\u00ednh A mu\u1ed1n g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn m\u00e1y t\u00ednh B trong c\u00f9ng m\u1ea1ng, m\u00e1y A s\u1ebd g\u1eedi m\u1ed9t y\u00eau c\u1ea7u ARP h\u1ecfi: &#8220;Ai c\u00f3 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a B? H\u00e3y cho t\u00f4i bi\u1ebft \u0111\u1ecba ch\u1ec9 MAC c\u1ee7a b\u1ea1n.&#8221; M\u00e1y B nh\u1eadn \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u00f3 s\u1ebd tr\u1ea3 l\u1eddi l\u1ea1i v\u1edbi \u0111\u1ecba ch\u1ec9 MAC c\u1ee7a ch\u00ednh m\u00ecnh. Sau \u0111\u00f3, m\u00e1y A c\u00f3 th\u1ec3 \u0111\u00f3ng g\u00f3i d\u1eef li\u1ec7u v\u00e0 g\u1eedi th\u1eb3ng t\u1edbi m\u00e1y B.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tam-quan-trong-cua-giao-thuc-ARP\"><\/span>T\u1ea7m quan tr\u1ecdng c\u1ee7a giao th\u1ee9c ARP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1eb7c d\u00f9 nghe c\u00f3 v\u1ebb \u0111\u01a1n gi\u1ea3n, giao th\u1ee9c ARP l\u1ea1i \u0111\u00f3ng vai tr\u00f2 t\u1ed1i quan tr\u1ecdng. N\u1ebfu kh\u00f4ng c\u00f3 ARP, c\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng LAN s\u1ebd kh\u00f4ng th\u1ec3 giao ti\u1ebfp tr\u1ef1c ti\u1ebfp v\u1edbi nhau, g\u00e2y ra s\u1ef1 gi\u00e1n \u0111o\u1ea1n nghi\u00eam tr\u1ecdng. ARP l\u00e0 c\u1ea7u n\u1ed1i kh\u00f4ng th\u1ec3 thi\u1ebfu gi\u00fap m\u1ea1ng c\u1ee5c b\u1ed9 ho\u1ea1t \u0111\u1ed9ng tr\u01a1n tru.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cac-loai-giao-thuc-ARP\"><\/span>C\u00e1c lo\u1ea1i giao th\u1ee9c ARP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u00ean c\u1ea1nh giao th\u1ee9c ARP c\u01a1 b\u1ea3n, c\u00f3 m\u1ed9t s\u1ed1 bi\u1ebfn th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3:<\/p>\n<ul>\n<li><strong>Proxy ARP:<\/strong> M\u1ed9t router c\u00f3 th\u1ec3 tr\u1ea3 l\u1eddi c\u00e1c y\u00eau c\u1ea7u ARP thay cho c\u00e1c thi\u1ebft b\u1ecb \u1edf m\u1ea1ng kh\u00e1c.<\/li>\n<li><strong>Gratuitous ARP:<\/strong> M\u1ed9t thi\u1ebft b\u1ecb t\u1ef1 nguy\u1ec7n g\u1eedi g\u00f3i tin ARP m\u00e0 kh\u00f4ng c\u1ea7n c\u00f3 y\u00eau c\u1ea7u n\u00e0o, th\u01b0\u1eddng d\u00f9ng \u0111\u1ec3 th\u00f4ng b\u00e1o \u0111\u1ecba ch\u1ec9 c\u1ee7a m\u00ecnh ho\u1eb7c ki\u1ec3m tra xung \u0111\u1ed9t \u0111\u1ecba ch\u1ec9 IP.<\/li>\n<li><strong>Reverse ARP (RARP):<\/strong> M\u1ed9t giao th\u1ee9c c\u0169 gi\u00fap thi\u1ebft b\u1ecb t\u00ecm \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ch\u00ednh n\u00f3 t\u1eeb \u0111\u1ecba ch\u1ec9 MAC.<\/li>\n<li><strong>Inverse ARP (InARP):<\/strong> \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ng Frame Relay \u0111\u1ec3 t\u00ecm \u0111\u1ecba ch\u1ec9 IP t\u1eeb \u0111\u1ecba ch\u1ec9 l\u1edbp m\u1ea1ng.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"ARP-Spoofing-la-gi\"><\/span>ARP Spoofing l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>ARP Spoofing<\/strong> hay c\u00f2n g\u1ecdi l\u00e0 <strong>ARP Poisoning<\/strong> l\u00e0 m\u1ed9t ki\u1ec3u <strong>t\u1ea5n c\u00f4ng m\u1ea1ng<\/strong> trong \u0111\u00f3 k\u1ebb t\u1ea5n c\u00f4ng g\u1eedi c\u00e1c g\u00f3i tin ARP (Address Resolution Protocol) gi\u1ea3 m\u1ea1o v\u00e0o m\u1ea1ng LAN. M\u1ee5c ti\u00eau l\u00e0 <strong>l\u00e0m sai l\u1ec7ch b\u1ea3ng ARP<\/strong> c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb, khi\u1ebfn ch\u00fang tin r\u1eb1ng \u0111\u1ecba ch\u1ec9 MAC c\u1ee7a hacker t\u01b0\u01a1ng \u1ee9ng v\u1edbi \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u1ed9t thi\u1ebft b\u1ecb h\u1ee3p ph\u00e1p (nh\u01b0 router ho\u1eb7c server).<\/p>\n<figure id=\"attachment_32959\" aria-describedby=\"caption-attachment-32959\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-32959\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/ARP-Spoofing-la-gi.jpg\" alt=\"ARP Spoofing l\u00e0 g\u00ec\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/ARP-Spoofing-la-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/ARP-Spoofing-la-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/ARP-Spoofing-la-gi-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-32959\" class=\"wp-caption-text\">ARP Spoofing l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>Khi b\u1ea3ng ARP b\u1ecb \u201c\u0111\u1ea7u \u0111\u1ed9c\u201d (poisoned), to\u00e0n b\u1ed9 d\u1eef li\u1ec7u v\u1ed1n d\u0129 ph\u1ea3i g\u1eedi \u0111\u1ebfn thi\u1ebft b\u1ecb h\u1ee3p ph\u00e1p s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n h\u01b0\u1edbng qua m\u00e1y c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng. Nh\u1edd \u0111\u00f3, hacker c\u00f3 th\u1ec3:<\/p>\n<ul>\n<li><strong>Nghe l\u00e9n (sniffing)<\/strong> c\u00e1c g\u00f3i tin \u0111\u1ec3 l\u1ea5y m\u1eadt kh\u1ea9u, cookie, th\u00f4ng tin nh\u1ea1y c\u1ea3m.<\/li>\n<li><strong>Th\u1ef1c hi\u1ec7n t\u1ea5n c\u00f4ng Man-in-the-Middle (MITM):<\/strong> ch\u00e8n, thay \u0111\u1ed5i, ho\u1eb7c ch\u1eb7n d\u1eef li\u1ec7u.<\/li>\n<li><strong>L\u00e0m gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 (DoS):<\/strong> c\u1eaft \u0111\u1ee9t k\u1ebft n\u1ed1i ho\u1eb7c g\u00e2y l\u1ed7i h\u1ec7 th\u1ed1ng m\u1ea1ng.<\/li>\n<\/ul>\n<p>Hi\u1ec3u \u0111\u01a1n gi\u1ea3n: ARP spoofing gi\u1ed1ng nh\u01b0 vi\u1ec7c k\u1ebb gian <strong>gi\u1ea3 danh b\u01b0u t\u00e1<\/strong>, khi\u1ebfn t\u1ea5t c\u1ea3 th\u01b0 t\u1eeb l\u1ebd ra ph\u1ea3i \u0111\u1ebfn \u0111\u00fang \u0111\u1ecba ch\u1ec9 s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n th\u1eb3ng v\u1ec1 tay h\u1eafn, t\u1eeb \u0111\u00f3 d\u1ec5 d\u00e0ng \u0111\u1ecdc, s\u1eeda ho\u1eb7c v\u1ee9t b\u1ecf.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Co-che-tan-cong-ARP-Spoofing-dien-ra-nhu-the-nao\"><\/span>C\u01a1 ch\u1ebf t\u1ea5n c\u00f4ng ARP Spoofing di\u1ec5n ra nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>K\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng <strong>ARP spoofing<\/strong> th\u01b0\u1eddng tu\u00e2n theo m\u1ed9t chu\u1ed7i c\u00e1c b\u01b0\u1edbc \u0111\u1ec3 tri\u1ec3n khai t\u1ea5n c\u00f4ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. Hi\u1ec3u r\u00f5 quy tr\u00ecnh n\u00e0y s\u1ebd gi\u00fap thi\u1ebft k\u1ebf c\u00e1c c\u01a1 ch\u1ebf ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n ph\u00f9 h\u1ee3p.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Quet-mang-Scanning\"><\/span>1. Qu\u00e9t m\u1ea1ng (Scanning)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean trong m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng ARP spoofing l\u00e0 <strong>qu\u00e9t m\u1ea1ng \u0111\u1ec3 t\u00ecm \u0111\u1ecba ch\u1ec9 IP m\u1ee5c ti\u00eau<\/strong>, k\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng \u0111\u1ec3 thu th\u1eadp th\u00f4ng tin v\u1ec1 h\u1ea1 t\u1ea7ng m\u1ea1ng, ph\u00e1t hi\u1ec7n c\u00e1c thi\u1ebft b\u1ecb \u0111ang ho\u1ea1t \u0111\u1ed9ng c\u00f9ng v\u1edbi \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ch\u00fang.<\/p>\n<p>Giai \u0111o\u1ea1n n\u00e0y gi\u00fap k\u1ebb t\u1ea5n c\u00f4ng n\u1eafm \u0111\u01b0\u1ee3c s\u01a1 \u0111\u1ed3 m\u1ea1ng v\u00e0 x\u00e1c \u0111\u1ecbnh m\u1ee5c ti\u00eau ti\u1ec1m n\u0103ng, ch\u1eb3ng h\u1ea1n nh\u01b0 router, server ho\u1eb7c nh\u1eefng thi\u1ebft b\u1ecb ch\u1ee9a d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m. D\u1ef1a tr\u00ean th\u00f4ng tin n\u00e0y, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 l\u00ean k\u1ebf ho\u1ea1ch t\u1ea5n c\u00f4ng v\u1edbi m\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng l\u1edbn nh\u1ea5t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Gia-mao-ARP-ARP-Spoofing\"><\/span>2. Gi\u1ea3 m\u1ea1o ARP (ARP Spoofing)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sau khi t\u00ecm th\u1ea5y thi\u1ebft b\u1ecb m\u1ee5c ti\u00eau, k\u1ebb t\u1ea5n c\u00f4ng s\u1ebd<strong> ph\u00e1t t\u00e1n c\u00e1c g\u00f3i tin ARP gi\u1ea3 m\u1ea1o<\/strong>, nh\u1eefng g\u00f3i tin n\u00e0y khi\u1ebfn thi\u1ebft b\u1ecb n\u1ea1n nh\u00e2n tin r\u1eb1ng \u0111\u1ecba ch\u1ec9 MAC c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng ch\u00ednh l\u00e0 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u1ed9t m\u00e1y ch\u1ee7 tin c\u1eady (v\u00ed d\u1ee5: gateway ho\u1eb7c m\u1ed9t thi\u1ebft b\u1ecb kh\u00e1c trong m\u1ea1ng).<\/p>\n<p>V\u1edbi s\u1ef1 h\u1ed7 tr\u1ee3 c\u1ee7a c\u00e1c c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng, qu\u00e1 tr\u00ecnh n\u00e0y c\u00f3 th\u1ec3 di\u1ec5n ra nhanh ch\u00f3ng v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n. Khi \u0111\u00f3, b\u1ed9 nh\u1edb \u0111\u1ec7m ARP (ARP cache) c\u1ee7a thi\u1ebft b\u1ecb n\u1ea1n nh\u00e2n s\u1ebd \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt, g\u00e1n \u0111\u1ecba ch\u1ec9 IP tin c\u1eady v\u1edbi MAC gi\u1ea3 m\u1ea1o c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng, cho ph\u00e9p h\u1eafn chuy\u1ec3n h\u01b0\u1edbng to\u00e0n b\u1ed9 l\u01b0u l\u01b0\u1ee3ng d\u1eef li\u1ec7u \u0111\u00e1ng l\u1ebd ph\u1ea3i g\u1eedi t\u1edbi m\u00e1y ch\u1ee7 h\u1ee3p ph\u00e1p.<\/p>\n<figure id=\"attachment_32960\" aria-describedby=\"caption-attachment-32960\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-32960\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Co-che-tan-cong-ARP-Spoofing.jpg\" alt=\"C\u01a1 ch\u1ebf t\u1ea5n c\u00f4ng ARP Spoofing\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Co-che-tan-cong-ARP-Spoofing.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Co-che-tan-cong-ARP-Spoofing-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Co-che-tan-cong-ARP-Spoofing-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-32960\" class=\"wp-caption-text\">C\u01a1 ch\u1ebf t\u1ea5n c\u00f4ng ARP Spoofing<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"3-Chan-va-can-thiep-luu-luong-Traffic-Interception\"><\/span>3. Ch\u1eb7n v\u00e0 can thi\u1ec7p l\u01b0u l\u01b0\u1ee3ng (Traffic Interception)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi ARP cache c\u1ee7a thi\u1ebft b\u1ecb m\u1ee5c ti\u00eau \u0111\u00e3 b\u1ecb ch\u1ec9nh s\u1eeda, to\u00e0n b\u1ed9 l\u01b0u l\u01b0\u1ee3ng d\u1eef li\u1ec7u g\u1eedi \u0111\u1ebfn m\u00e1y ch\u1ee7 h\u1ee3p ph\u00e1p s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n qua k\u1ebb t\u1ea5n c\u00f4ng m\u00e0 n\u1ea1n nh\u00e2n kh\u00f4ng h\u1ec1 hay bi\u1ebft. K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3<strong> \u0111\u1ecdc, ghi l\u1ea1i ho\u1eb7c th\u1eadm ch\u00ed ch\u1ec9nh s\u1eeda d\u1eef li\u1ec7u<\/strong> trao \u0111\u1ed5i gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb.<\/p>\n<p>\u1ede giai \u0111o\u1ea1n n\u00e0y, nh\u1eefng th\u00f4ng tin quan tr\u1ecdng nh\u01b0 t\u00ean \u0111\u0103ng nh\u1eadp, m\u1eadt kh\u1ea9u ho\u1eb7c tin nh\u1eafn b\u00ed m\u1eadt c\u00f3 th\u1ec3 b\u1ecb \u0111\u00e1nh c\u1eafp, g\u00e2y r\u1ee7i ro nghi\u00eam tr\u1ecdng cho c\u1ea3 c\u00e1 nh\u00e2n l\u1eabn t\u1ed5 ch\u1ee9c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-Chuyen-tiep-goi-tin-tuy-chon-%E2%80%93-Packet-Forwarding\"><\/span>4. Chuy\u1ec3n ti\u1ebfp g\u00f3i tin (t\u00f9y ch\u1ecdn \u2013 Packet Forwarding)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, k\u1ebb t\u1ea5n c\u00f4ng s\u1ebd ch\u1ecdn c\u00e1ch <strong>chuy\u1ec3n ti\u1ebfp g\u00f3i tin \u0111\u00e3 ch\u1eb7n t\u1edbi \u0111\u00edch th\u1ef1c s\u1ef1<\/strong> c\u1ee7a n\u00f3 gi\u00fap duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng b\u00ecnh th\u01b0\u1eddng, khi\u1ebfn vi\u1ec7c ph\u00e1t hi\u1ec7n t\u1ea5n c\u00f4ng tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n.<\/p>\n<p>B\u1eb1ng c\u00e1ch n\u00e0y, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 k\u00e9o d\u00e0i th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng m\u00e0 kh\u00f4ng b\u1ecb nghi ng\u1edd, \u0111\u1ed3ng th\u1eddi gia t\u0103ng kh\u1ea3 n\u0103ng \u0111\u00e1nh c\u1eafp th\u00eam d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m ho\u1eb7c ch\u1ec9nh s\u1eeda n\u1ed9i dung li\u00ean l\u1ea1c \u0111ang di\u1ec5n ra.<\/p>\n<p>M\u1ed9t s\u1ed1 gi\u1ea3i ph\u00e1p Endpoint Detection &amp; Response (EDR) ho\u1eb7c gi\u1ea3i ph\u00e1p b\u1ea3o m\u1eadt \u0111\u1ea7u cu\u1ed1i c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m r\u1ee7i ro; n\u00ean tr\u00edch d\u1eabn nh\u00e0 cung c\u1ea5p ho\u1eb7c k\u1ebft qu\u1ea3 ki\u1ec3m th\u1eed \u0111\u1ed9c l\u1eadp.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-dau-hieu-nhan-biet-cua-tan-cong-ARP-Spoofing\"><\/span>C\u00e1c d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft c\u1ee7a t\u1ea5n c\u00f4ng ARP Spoofing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Nh\u1eadn bi\u1ebft s\u1edbm c\u00e1c d\u1ea5u hi\u1ec7u b\u1ea5t th\u01b0\u1eddng l\u00e0 c\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 \u0111\u1ed1i ph\u00f3 v\u1edbi <strong>t\u1ea5n c\u00f4ng ARP Spoofing<\/strong>. C\u00e1c d\u1ea5u hi\u1ec7u th\u01b0\u1eddng g\u1eb7p bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>M\u1ea5t k\u1ebft n\u1ed1i Internet \u0111\u1ed9t ng\u1ed9t ho\u1eb7c t\u1ed1c \u0111\u1ed9 m\u1ea1ng ch\u1eadm b\u1ea5t th\u01b0\u1eddng:<\/strong> \u0110\u00e2y l\u00e0 d\u1ea5u hi\u1ec7u ph\u1ed5 bi\u1ebfn nh\u1ea5t. L\u01b0u l\u01b0\u1ee3ng truy c\u1eadp b\u1ecb chuy\u1ec3n h\u01b0\u1edbng khi\u1ebfn t\u1ed1c \u0111\u1ed9 m\u1ea1ng gi\u1ea3m \u0111i \u0111\u00e1ng k\u1ec3.<\/li>\n<li><strong>Kh\u00f4ng th\u1ec3 truy c\u1eadp v\u00e0o m\u1ed9t s\u1ed1 trang web nh\u1ea5t \u0111\u1ecbnh:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 ch\u1ecdn l\u1ecdc ch\u1eb7n truy c\u1eadp \u0111\u1ebfn m\u1ed9t v\u00e0i d\u1ecbch v\u1ee5 c\u1ee5 th\u1ec3.<\/li>\n<li><strong>C\u1ea3nh b\u00e1o xung \u0111\u1ed9t \u0111\u1ecba ch\u1ec9 IP:<\/strong> M\u1ed9t s\u1ed1 h\u1ec7 \u0111i\u1ec1u h\u00e0nh s\u1ebd c\u1ea3nh b\u00e1o khi ph\u00e1t hi\u1ec7n ra m\u1ed9t \u0111\u1ecba ch\u1ec9 IP c\u00f3 nhi\u1ec1u h\u01a1n m\u1ed9t \u0111\u1ecba ch\u1ec9 MAC t\u01b0\u01a1ng \u1ee9ng trong b\u1ed9 nh\u1edb \u0111\u1ec7m ARP.<\/li>\n<li><strong>C\u00e1c g\u00f3i tin kh\u00f4ng h\u1ee3p l\u1ec7:<\/strong> Ph\u00e2n t\u00edch c\u00e1c g\u00f3i tin b\u1eb1ng c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng (nh\u01b0 Wireshark) c\u00f3 th\u1ec3 cho th\u1ea5y nh\u1eefng g\u00f3i tin ARP kh\u00f4ng h\u1ee3p l\u1ec7 \u0111ang \u0111\u01b0\u1ee3c g\u1eedi li\u00ean t\u1ee5c.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Hau-qua-va-rui-ro-cua-tan-cong-ARP-Spoofing\"><\/span>H\u1eadu qu\u1ea3 v\u00e0 r\u1ee7i ro c\u1ee7a t\u1ea5n c\u00f4ng ARP Spoofing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u1ea5n c\u00f4ng ARP Spoofing c\u00f3 th\u1ec3 g\u00e2y ra nhi\u1ec1u thi\u1ec7t h\u1ea1i nghi\u00eam tr\u1ecdng, t\u1eeb c\u00e1 nh\u00e2n \u0111\u1ebfn doanh nghi\u1ec7p. H\u1eadu qu\u1ea3 v\u00e0 r\u1ee7i ro c\u1ee7a t\u1ea5n c\u00f4ng ARP Spoofing bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Tr\u1ed9m c\u1eafp d\u1eef li\u1ec7u<\/strong>: K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 \u0111\u00e1nh c\u1eafp m\u1eadt kh\u1ea9u, th\u00f4ng tin \u0111\u0103ng nh\u1eadp, tin nh\u1eafn ri\u00eang t\u01b0 v\u00e0 c\u00e1c th\u00f4ng tin t\u00e0i ch\u00ednh, t\u1eeb \u0111\u00f3 g\u00e2y thi\u1ec7t h\u1ea1i v\u1ec1 ph\u00e1p l\u00fd v\u00e0 uy t\u00edn cho c\u00e1 nh\u00e2n v\u00e0 t\u1ed5 ch\u1ee9c.<\/li>\n<li><strong>Gi\u00e1n \u0111o\u1ea1n m\u1ea1ng<\/strong>: T\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng b\u1ea3ng ARP ho\u1eb7c \u0111\u1ecbnh tuy\u1ebfn sai l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng, g\u00e2y ch\u1eadm tr\u1ec5 ho\u1eb7c ng\u1eebng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ng. K\u1ebft h\u1ee3p v\u1edbi t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 (DoS), ARP Spoofing c\u00f3 th\u1ec3 l\u00e0m m\u1ea1ng t\u00ea li\u1ec7t, \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng kinh doanh.<\/li>\n<li><strong>Ph\u00e2n ph\u1ed1i ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i (Malware)<\/strong>: K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 ch\u00e8n c\u00e1c m\u00e3 \u0111\u1ed9c v\u00e0o l\u01b0u l\u01b0\u1ee3ng b\u1ecb ch\u1eb7n, g\u00e2y nhi\u1ec5m malware tr\u00ean to\u00e0n b\u1ed9 m\u1ea1ng l\u00e0m h\u01b0 h\u1ecfng d\u1eef li\u1ec7u v\u00e0 ph\u00e1 ho\u1ea1i b\u1ea3o m\u1eadt.<\/li>\n<li><strong>Chi\u1ebfm quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n phi\u00ean (Session Hijacking)<\/strong>: K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 l\u1ea5y quy\u1ec1n truy c\u1eadp c\u00e1c phi\u00ean l\u00e0m vi\u1ec7c hi\u1ec7n t\u1ea1i c\u1ee7a ng\u01b0\u1eddi d\u00f9ng b\u1eb1ng c\u00e1ch \u0111\u00e1nh c\u1eafp ID phi\u00ean.<\/li>\n<li><strong>T\u1ea5n c\u00f4ng DDoS th\u00f4ng qua ARP Spoofing<\/strong>: K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ecba ch\u1ec9 MAC gi\u1ea3 m\u1ea1o \u0111\u1ec3 th\u1ef1c hi\u1ec7n t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 ph\u00e2n t\u00e1n (DDoS) nh\u1eb1m l\u00e0m ng\u1eadp l\u1ee5t server m\u1ee5c ti\u00eau.<\/li>\n<li><strong>Kh\u00f3 ph\u00e1t hi\u1ec7n<\/strong>: C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ARP Spoofing th\u01b0\u1eddng di\u1ec5n ra \u00e2m th\u1ea7m, kh\u00f3 ph\u00e1t hi\u1ec7n b\u1eb1ng c\u00e1c d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng, \u0111\u1eb7c bi\u1ec7t v\u1edbi ng\u01b0\u1eddi d\u00f9ng th\u00f4ng th\u01b0\u1eddng, ch\u1ec9 c\u00f3 th\u1ec3 nh\u1eadn di\u1ec7n qua c\u00e1c c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng ho\u1eb7c s\u1ef1 ch\u1eadm tr\u1ec5 kh\u00e1c th\u01b0\u1eddng c\u1ee7a m\u1ea1ng.<\/li>\n<\/ul>\n<p>Nh\u1eefng h\u1eadu qu\u1ea3 n\u00e0y \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn an ninh th\u00f4ng tin, s\u1ef1 \u1ed5n \u0111\u1ecbnh v\u00e0 ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c c\u1ee7a h\u1ec7 th\u1ed1ng m\u1ea1ng n\u1ed9i b\u1ed9.<\/p>\n<figure id=\"attachment_32961\" aria-describedby=\"caption-attachment-32961\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-32961\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Hau-qua-va-rui-ro-cua-tan-cong-ARP-Spoofing.jpg\" alt=\"H\u1eadu qu\u1ea3 v\u00e0 r\u1ee7i ro c\u1ee7a t\u1ea5n c\u00f4ng ARP Spoofing\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Hau-qua-va-rui-ro-cua-tan-cong-ARP-Spoofing.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Hau-qua-va-rui-ro-cua-tan-cong-ARP-Spoofing-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Hau-qua-va-rui-ro-cua-tan-cong-ARP-Spoofing-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-32961\" class=\"wp-caption-text\">H\u1eadu qu\u1ea3 v\u00e0 r\u1ee7i ro c\u1ee7a t\u1ea5n c\u00f4ng ARP Spoofing<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Cac-dang-tan-cong-ARP-Spoofing\"><\/span>C\u00e1c d\u1ea1ng t\u1ea5n c\u00f4ng ARP Spoofing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c d\u1ea1ng t\u1ea5n c\u00f4ng ARP spoofing l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng v\u00e0 chuy\u00ean gia b\u1ea3o m\u1eadt. Nh\u1edd \u0111\u00f3, h\u1ecd c\u00f3 th\u1ec3 ph\u00f2ng th\u1ee7 hi\u1ec7u qu\u1ea3 tr\u01b0\u1edbc nh\u1eefng m\u1ed1i \u0111e d\u1ecda n\u00e0y. B\u00ean c\u1ea1nh h\u00ecnh th\u1ee9c t\u1ea5n c\u00f4ng ph\u1ed5 bi\u1ebfn, ARP spoofing c\u00f2n c\u00f3 m\u1ed9t s\u1ed1 bi\u1ebfn th\u1ec3 kh\u00e1c nh\u01b0:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-ARP-Spoofing-co-ban\"><\/span><strong>1. ARP Spoofing c\u01a1 b\u1ea3n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>K\u1ebb t\u1ea5n c\u00f4ng g\u1eedi c\u00e1c g\u00f3i tin ARP gi\u1ea3 m\u1ea1o \u0111\u1ebfn m\u1ed9t thi\u1ebft b\u1ecb. Khi \u0111\u00f3, thi\u1ebft b\u1ecb s\u1ebd li\u00ean k\u1ebft \u0111\u1ecba ch\u1ec9 MAC c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng v\u1edbi m\u1ed9t \u0111\u1ecba ch\u1ec9 IP h\u1ee3p ph\u00e1p (ch\u1eb3ng h\u1ea1n nh\u01b0 gateway ho\u1eb7c m\u1ed9t thi\u1ebft b\u1ecb kh\u00e1c trong m\u1ea1ng).<\/p>\n<p>Nh\u1edd v\u1eady, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 chi\u1ebfm quy\u1ec1n x\u1eed l\u00fd to\u00e0n b\u1ed9 l\u01b0u l\u01b0\u1ee3ng g\u1eedi \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 IP \u0111\u00f3, th\u1eadm ch\u00ed ch\u1ec9nh s\u1eeda d\u1eef li\u1ec7u m\u00e0 n\u1ea1n nh\u00e2n ho\u00e0n to\u00e0n kh\u00f4ng hay bi\u1ebft.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-ARP-Spoofing-kieu-Man-in-the-Middle-MitM\"><\/span><strong>2. ARP Spoofing ki\u1ec3u Man-in-the-Middle (MitM)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>K\u1ebb t\u1ea5n c\u00f4ng mu\u1ed1n chen v\u00e0o gi\u1eefa hai thi\u1ebft b\u1ecb \u0111ang giao ti\u1ebfp. H\u1eafn gi\u1ea3 m\u1ea1o c\u00e1c g\u00f3i tin ARP \u0111\u1ec3 c\u1ea3 hai thi\u1ebft b\u1ecb tin r\u1eb1ng ch\u00fang \u0111ang k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi nhau. C\u00e1ch n\u00e0y cho ph\u00e9p h\u1eafn ch\u1eb7n v\u00e0 thay \u0111\u1ed5i n\u1ed9i dung d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n.<\/p>\n<p>K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 s\u1eeda \u0111\u1ed5i th\u00f4ng tin li\u00ean l\u1ea1c, \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m ho\u1eb7c ch\u00e8n m\u00e3 \u0111\u1ed9c v\u00e0o lu\u1ed3ng l\u01b0u l\u01b0\u1ee3ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-ARP-Flooding-Tan-cong-tu-choi-dich-vu-%E2%80%93-DoS\"><\/span><strong>3. ARP Flooding (T\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 \u2013 DoS)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>K\u1ebb t\u1ea5n c\u00f4ng g\u1eedi h\u00e0ng lo\u1ea1t g\u00f3i tin ARP gi\u1ea3 m\u1ea1o v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn, l\u00e0m qu\u00e1 t\u1ea3i b\u1ea3ng ARP c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb. Khi \u0111\u00f3, c\u00e1c m\u1ee5c h\u1ee3p l\u1ec7 trong b\u1ea3ng ARP kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c duy tr\u00ec. H\u1ec7 qu\u1ea3 l\u00e0 thi\u1ebft b\u1ecb kh\u00f4ng th\u1ec3 giao ti\u1ebfp b\u00ecnh th\u01b0\u1eddng, d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng DoS, khi\u1ebfn m\u1ed9t ph\u1ea7n m\u1ea1ng b\u1ecb t\u00ea li\u1ec7t ho\u1eb7c kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4-ARP-Cache-Poisoning\"><\/span><strong>4. ARP Cache Poisoning<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>K\u1ebb t\u1ea5n c\u00f4ng g\u1eedi c\u00e1c g\u00f3i ARP gi\u1ea3 m\u1ea1o (kh\u00f4ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u) \u0111\u1ec3 c\u1eadp nh\u1eadt sai th\u00f4ng tin trong b\u1ea3ng ARP cache c\u1ee7a thi\u1ebft b\u1ecb. K\u1ebft qu\u1ea3 l\u00e0 \u00e1nh x\u1ea1 IP \u2013 MAC h\u1ee3p l\u1ec7 b\u1ecb thay th\u1ebf b\u1eb1ng \u00e1nh x\u1ea1 gi\u1ea3.<\/p>\n<p>Nh\u1edd v\u1eady, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 chuy\u1ec3n h\u01b0\u1edbng l\u01b0u l\u01b0\u1ee3ng v\u1ec1 ph\u00eda m\u00ecnh ho\u1eb7c m\u1ed9t m\u00e1y ch\u1ee7 \u0111\u1ed9c h\u1ea1i, t\u1eeb \u0111\u00f3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00e1c nh\u01b0 \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u, DoS ho\u1eb7c ki\u1ec3m so\u00e1t m\u1ea1ng. Tr\u00ean h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng, t\u00ecnh tr\u1ea1ng n\u00e0y s\u1ebd duy tr\u00ec cho \u0111\u1ebfn khi \u0111\u01b0\u1ee3c x\u00f3a th\u1ee7 c\u00f4ng ho\u1eb7c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c kh\u1edfi \u0111\u1ed9ng l\u1ea1i.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"So-sanh-ARP-spoofing-voi-DNS-spoofing\"><\/span>So s\u00e1nh ARP spoofing v\u1edbi DNS spoofing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hai lo\u1ea1i t\u1ea5n c\u00f4ng n\u00e0y th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u1eabn v\u00ec c\u00f9ng m\u1ee5c ti\u00eau l\u00e0 chuy\u1ec3n h\u01b0\u1edbng l\u01b0u l\u01b0\u1ee3ng. Tuy nhi\u00ean, ch\u00fang ho\u1ea1t \u0111\u1ed9ng \u1edf c\u00e1c t\u1ea7ng kh\u00e1c nhau c\u1ee7a m\u00f4 h\u00ecnh OSI:<\/p>\n<ul>\n<li><strong>ARP Spoofing<\/strong> ho\u1ea1t \u0111\u1ed9ng \u1edf l\u1edbp 2 (Data Link), nh\u1eafm v\u00e0o c\u00e1c thi\u1ebft b\u1ecb trong c\u00f9ng m\u1ed9t m\u1ea1ng LAN. N\u00f3 gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 MAC \u0111\u1ec3 chuy\u1ec3n h\u01b0\u1edbng l\u01b0u l\u01b0\u1ee3ng.<\/li>\n<li><strong>DNS Spoofing<\/strong> ho\u1ea1t \u0111\u1ed9ng \u1edf l\u1edbp 7 (Application), nh\u1eafm v\u00e0o m\u00e1y ch\u1ee7 DNS. K\u1ebb t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o m\u00e1y ch\u1ee7 DNS \u0111\u1ec3 chuy\u1ec3n h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn c\u00e1c trang web \u0111\u1ed9c h\u1ea1i ngay c\u1ea3 khi h\u1ecd g\u00f5 \u0111\u00fang \u0111\u1ecba ch\u1ec9.<\/li>\n<\/ul>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng so s\u00e1nh gi\u1eefa ARP Spoofing v\u00e0 DNS Spoofing:<\/p>\n<div style=\"overflow: auto; max-width: 100%; font-family: Arial, Helvetica, sans-serif;\">\n<table style=\"width: 100%; border-collapse: collapse; min-width: 680px; border: 2px solid #0D6EFD;\" role=\"table\">\n<caption style=\"caption-side: top; text-align: left; font-weight: 600; padding: 12px 16px; color: #0d6efd;\">So s\u00e1nh: ARP Spoofing vs DNS Spoofing<\/caption>\n<thead>\n<tr>\n<th style=\"padding: 10px 12px; background: #0d6efd; color: #ffffff; border-right: 2px solid #0d6efd; text-align: center;\">Ti\u00eau ch\u00ed<\/th>\n<th style=\"padding: 10px 12px; background: #0d6efd; color: #ffffff; border-right: 2px solid #0d6efd; text-align: center;\">ARP Spoofing<\/th>\n<th style=\"padding: 10px 12px; background: #0d6efd; color: #ffffff; text-align: center;\">DNS Spoofing<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #ffffff;\">\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top; font-weight: 600;\">B\u1ea3n ch\u1ea5t<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">Gi\u1ea3 m\u1ea1o c\u00e1c b\u1ea3n tin ARP \u0111\u1ec3 \u00e1nh x\u1ea1 sai \u0111\u1ecba ch\u1ec9 MAC-IP trong m\u1ea1ng LAN.<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">Gi\u1ea3 m\u1ea1o ho\u1eb7c l\u00e0m thay \u0111\u1ed5i b\u1ea3n ghi DNS nh\u1eb1m chuy\u1ec3n h\u01b0\u1edbng t\u00ean mi\u1ec1n sang IP gi\u1ea3 m\u1ea1o.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top; font-weight: 600;\">M\u1ee5c ti\u00eau<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">\u0110\u00e1nh l\u1eeba c\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng LAN \u0111\u1ec3 g\u1eedi d\u1eef li\u1ec7u qua m\u00e1y k\u1ebb t\u1ea5n c\u00f4ng (Man-in-the-Middle).<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">G\u00e2y chuy\u1ec3n h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn trang web gi\u1ea3 m\u1ea1o ho\u1eb7c \u0111\u1ed9c h\u1ea1i th\u00f4ng qua b\u1ed9 nh\u1edb cache DNS.<\/td>\n<\/tr>\n<tr style=\"background: #ffffff;\">\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top; font-weight: 600;\">Ph\u1ea1m vi t\u1ea5n c\u00f4ng<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">Ch\u1ec9 x\u1ea3y ra trong m\u1ea1ng n\u1ed9i b\u1ed9 (LAN) s\u1eed d\u1ee5ng giao th\u1ee9c ARP.<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">C\u00f3 th\u1ec3 x\u1ea3y ra tr\u00ean ph\u1ea1m vi r\u1ed9ng h\u01a1n, tr\u00ean Internet th\u00f4ng qua c\u00e1c m\u00e1y ch\u1ee7 DNS.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top; font-weight: 600;\">T\u00e1c \u0111\u1ed9ng<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">Nghe tr\u1ed9m, thay \u0111\u1ed5i, ch\u1eb7n l\u01b0u l\u01b0\u1ee3ng d\u1eef li\u1ec7u n\u1ed9i b\u1ed9; chi\u1ebfm quy\u1ec1n phi\u00ean l\u00e0m vi\u1ec7c.<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">L\u1eeba ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp trang gi\u1ea3 m\u1ea1o \u0111\u1ec3 \u0111\u00e1nh c\u1eafp th\u00f4ng tin ho\u1eb7c ph\u00e1t t\u00e1n ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i.<\/td>\n<\/tr>\n<tr style=\"background: #ffffff;\">\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top; font-weight: 600;\">C\u00e1ch ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">Ki\u1ec3m tra b\u1ea3ng ARP, s\u1eed d\u1ee5ng Dynamic ARP Inspection (DAI), m\u00e3 h\u00f3a giao ti\u1ebfp (HTTPS).<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">Ki\u1ec3m tra t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a c\u00e1c b\u1ea3n ghi DNS, s\u1eed d\u1ee5ng DNSSEC, ki\u1ec3m tra \u0111\u1ed9 tin c\u1eady m\u00e1y ch\u1ee7 DNS.<\/td>\n<\/tr>\n<tr style=\"background: #f8fbff;\">\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top; font-weight: 600;\">Y\u00eau c\u1ea7u t\u1ea5n c\u00f4ng<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">C\u1ea7n truy c\u1eadp v\u00e0o m\u1ea1ng n\u1ed9i b\u1ed9.<\/td>\n<td style=\"padding: 10px 12px; border-top: 1px solid #e9f2ff; vertical-align: top;\">C\u00f3 th\u1ec3 t\u1ea5n c\u00f4ng t\u1eeb xa, can thi\u1ec7p v\u00e0o DNS server ho\u1eb7c m\u00e1y c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>ARP Spoofing l\u00e0 t\u1ea5n c\u00f4ng l\u1edbp li\u00ean k\u1ebft d\u1eef li\u1ec7u trong m\u1ea1ng n\u1ed9i b\u1ed9 nh\u1eb1m chi\u1ebfm quy\u1ec1n l\u01b0u l\u01b0\u1ee3ng giao ti\u1ebfp m\u1ea1ng LAN, c\u00f2n DNS Spoofing l\u00e0 t\u1ea5n c\u00f4ng v\u00e0o l\u1edbp \u1ee9ng d\u1ee5ng nh\u1eb1m chuy\u1ec3n h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 IP gi\u1ea3 m\u1ea1o th\u00f4ng qua vi\u1ec7c l\u00e0m gi\u1ea3 ho\u1eb7c thay \u0111\u1ed5i b\u1ea3n ghi DNS tr\u00ean Internet ho\u1eb7c m\u1ea1ng n\u1ed9i b\u1ed9.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ai-la-nguoi-thuc-hien-cac-cuoc-tan-cong-ARP-Spoofing\"><\/span>Ai l\u00e0 ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ARP Spoofing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ARP Spoofing th\u01b0\u1eddng l\u00e0 c\u00e1c <strong>k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o m\u1ea1ng n\u1ed9i b\u1ed9<\/strong> m\u00e0 ch\u00fang mu\u1ed1n t\u1ea5n c\u00f4ng. Nh\u1eefng k\u1ebb n\u00e0y c\u00f3 th\u1ec3 l\u00e0:<\/p>\n<ul>\n<li><strong>Tin t\u1eb7c (hacker)<\/strong> c\u1ed1 \u00fd x\u00e2m nh\u1eadp v\u00e0o m\u1ea1ng LAN \u0111\u1ec3 th\u1ef1c hi\u1ec7n t\u1ea5n c\u00f4ng Man-in-the-Middle (MitM), nh\u1eb1m \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u, chi\u1ebfm quy\u1ec1n truy c\u1eadp, ho\u1eb7c g\u00e2y gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5.<\/li>\n<li><strong>Nh\u00e2n vi\u00ean n\u1ed9i b\u1ed9 ho\u1eb7c ng\u01b0\u1eddi d\u00f9ng m\u1ea1ng tr\u00e1i ph\u00e9p<\/strong> t\u1eadn d\u1ee5ng \u0111i\u1ec3m y\u1ebfu ARP \u0111\u1ec3 khai th\u00e1c th\u00f4ng tin ho\u1eb7c l\u00e0m gi\u00e1n \u0111o\u1ea1n h\u1ec7 th\u1ed1ng.<\/li>\n<li><strong>Nh\u1eefng ng\u01b0\u1eddi s\u1edf h\u1eefu c\u00e1c c\u00f4ng c\u1ee5 gi\u1ea3 m\u1ea1o<\/strong> ARP nh\u01b0 arpspoof (dsniff), Ettercap, Bettercap, Cain &amp; Abel (Windows), Responder (m\u1ed9t s\u1ed1 m\u1ee5c \u0111\u00edch SMB\/LLMNR), Bettercap hi\u1ec7n l\u00e0 tool ph\u1ed5 bi\u1ebfn. \u0110\u1ed1i v\u1edbi sniffing: Wireshark, tcpdump.<\/li>\n<\/ul>\n<p>C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ARP Spoofing th\u01b0\u1eddng do nh\u1eefng c\u00e1 nh\u00e2n ho\u1eb7c nh\u00f3m c\u00f3 m\u1ee5c \u0111\u00edch x\u1ea5u, c\u00f3 kh\u1ea3 n\u0103ng truy c\u1eadp v\u00e0o m\u1ea1ng c\u1ee5c b\u1ed9, s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 k\u1ef9 thu\u1eadt \u0111\u1ec3 gi\u1ea3 m\u1ea1o b\u1ea3n tin ARP v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh vi \u0111\u1ed9c h\u1ea1i trong m\u1ea1ng LAN.<\/p>\n<p>Tuy nhi\u00ean, \u0111\u1ec3 t\u1ea5n c\u00f4ng quy m\u00f4 l\u1edbn ho\u1eb7c v\u01b0\u1ee3t qua c\u00e1c h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt cao, k\u1ebb t\u1ea5n c\u00f4ng c\u1ea7n c\u00f3 tr\u00ecnh \u0111\u1ed9 v\u00e0 k\u1ef9 n\u0103ng chuy\u00ean s\u00e2u h\u01a1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-phat-hien-mot-cuoc-tan-cong-ARP-Cache-Poisoning\"><\/span>C\u00e1ch ph\u00e1t hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng ARP Cache Poisoning<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c ph\u00e1t hi\u1ec7n <strong>ARP cache poisoning<\/strong> \u0111\u00f3ng vai tr\u00f2 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt m\u1ea1ng, b\u1edfi ki\u1ec3u t\u1ea5n c\u00f4ng n\u00e0y th\u01b0\u1eddng di\u1ec5n ra trong th\u1eddi gian d\u00e0i m\u00e0 kh\u00f4ng b\u1ecb ph\u00e1t hi\u1ec7n. Qu\u00e1 tr\u00ecnh ph\u00e1t hi\u1ec7n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n th\u00f4ng qua vi\u1ec7c quan s\u00e1t c\u1ea9n th\u1eadn v\u00e0 \u00e1p d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng th\u00f4ng minh.<\/p>\n<p>M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p quan tr\u1ecdng gi\u00fap nh\u1eadn di\u1ec7n ho\u1ea1t \u0111\u1ed9ng <strong>ARP spoofing<\/strong> g\u1ed3m c\u00f3:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-Giam-sat-ARP-ARP-Monitoring\"><\/span>1. Gi\u00e1m s\u00e1t ARP (ARP Monitoring)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vi\u1ec7c <strong>gi\u00e1m s\u00e1t li\u00ean t\u1ee5c l\u01b0u l\u01b0\u1ee3ng ARP<\/strong> gi\u00fap <strong>ph\u00e1t hi\u1ec7n c\u00e1c d\u1ea5u hi\u1ec7u b\u1ea5t th\u01b0\u1eddng<\/strong>. Khi theo d\u00f5i c\u00e1c g\u00f3i ARP di chuy\u1ec3n trong m\u1ea1ng, qu\u1ea3n tr\u1ecb vi\u00ean c\u00f3 th\u1ec3 nh\u1eadn ra s\u1ef1 kh\u00f4ng kh\u1edbp, ch\u1eb3ng h\u1ea1n nh\u01b0 nhi\u1ec1u \u0111\u1ecba ch\u1ec9 MAC \u0111\u01b0\u1ee3c \u00e1nh x\u1ea1 t\u1edbi c\u00f9ng m\u1ed9t \u0111\u1ecba ch\u1ec9 IP.<\/p>\n<p>\u0110\u00e2y c\u00f3 th\u1ec3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o, v\u00ec trong c\u1ea5u h\u00ecnh m\u1ea1ng h\u1ee3p l\u1ec7, m\u1ed7i \u0111\u1ecba ch\u1ec9 IP ch\u1ec9 t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t \u0111\u1ecba ch\u1ec9 MAC duy nh\u1ea5t. C\u00e1c c\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t ARP c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a vi\u1ec7c n\u00e0y v\u00e0 g\u1eedi c\u1ea3nh b\u00e1o cho qu\u1ea3n tr\u1ecb vi\u00ean v\u1ec1 ho\u1ea1t \u0111\u1ed9ng kh\u1ea3 nghi theo th\u1eddi gian th\u1ef1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Phat-hien-Gratuitous-ARP-Gratuitous-ARP-Detection\"><\/span>2. Ph\u00e1t hi\u1ec7n Gratuitous ARP (Gratuitous ARP Detection)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Gratuitous ARP l\u00e0 nh\u1eefng g\u00f3i tin ARP ph\u1ea3n h\u1ed3i kh\u00f4ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u, trong \u0111\u00f3 thi\u1ebft b\u1ecb t\u1ef1 c\u00f4ng b\u1ed1 \u00e1nh x\u1ea1 gi\u1eefa \u0111\u1ecba ch\u1ec9 IP v\u00e0 MAC c\u1ee7a m\u00ecnh. N\u1ebfu xu\u1ea5t hi\u1ec7n m\u1ed9t lo\u1ea1t c\u00e1c ph\u1ea3n h\u1ed3i kh\u00f4ng mong mu\u1ed1n nh\u01b0 v\u1eady, c\u00f3 th\u1ec3 \u0111\u00f3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng ARP spoofing.<\/p>\n<p>C\u00e1c c\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t c\u00f3 th\u1ec3 theo d\u00f5i lo\u1ea1i g\u00f3i tin n\u00e0y. Khi s\u1ed1 l\u01b0\u1ee3ng c\u00e1c g\u00f3i Gratuitous ARP t\u0103ng \u0111\u1ed9t bi\u1ebfn, qu\u1ea3n tr\u1ecb vi\u00ean c\u1ea7n ti\u1ebfn h\u00e0nh \u0111i\u1ec1u tra th\u00eam. L\u01b0u l\u01b0\u1ee3ng Gratuitous ARP b\u1ea5t th\u01b0\u1eddng \u1edf m\u1ee9c cao c\u0169ng c\u00f3 th\u1ec3 l\u00e0 ch\u1ec9 b\u00e1o ban \u0111\u1ea7u c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng.<\/p>\n<figure id=\"attachment_32962\" aria-describedby=\"caption-attachment-32962\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-32962\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-phat-hien-mot-cuoc-tan-cong-ARP-Cache-Poisoning.jpg\" alt=\"C\u00e1ch ph\u00e1t hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng ARP Cache Poisoning\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-phat-hien-mot-cuoc-tan-cong-ARP-Cache-Poisoning.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-phat-hien-mot-cuoc-tan-cong-ARP-Cache-Poisoning-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-phat-hien-mot-cuoc-tan-cong-ARP-Cache-Poisoning-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-32962\" class=\"wp-caption-text\">C\u00e1ch ph\u00e1t hi\u1ec7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng ARP Cache Poisoning<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"3-Phan-tich-luu-luong-Traffic-Analysis\"><\/span>3. Ph\u00e2n t\u00edch l\u01b0u l\u01b0\u1ee3ng (Traffic Analysis)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u00e2n t\u00edch l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng \u0111\u1ec3<strong> t\u00ecm c\u00e1c m\u1eabu b\u1ea5t th\u01b0\u1eddng ho\u1eb7c lu\u1ed3ng d\u1eef li\u1ec7u kh\u00f4ng mong \u0111\u1ee3i<\/strong> gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb c\u0169ng l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n hi\u1ec7u qu\u1ea3. B\u1eb1ng c\u00e1ch xem x\u00e9t kh\u1ed1i l\u01b0\u1ee3ng, th\u1eddi gian v\u00e0 h\u01b0\u1edbng \u0111i c\u1ee7a l\u01b0u l\u01b0\u1ee3ng, qu\u1ea3n tr\u1ecb vi\u00ean c\u00f3 th\u1ec3 nh\u1eadn ra nh\u1eefng b\u1ea5t th\u01b0\u1eddng c\u00f3 th\u1ec3 cho th\u1ea5y m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng ARP spoofing \u0111ang di\u1ec5n ra.<\/p>\n<p>V\u00ed d\u1ee5, n\u1ebfu m\u1ed9t thi\u1ebft b\u1ecb b\u1ea5t ng\u1edd nh\u1eadn l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn t\u1eeb nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 th\u1ec3 ch\u1ec9 ra r\u1eb1ng k\u1ebft n\u1ed1i c\u1ee7a n\u00f3 \u0111\u00e3 b\u1ecb ch\u1eb7n. C\u00e1c h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n x\u00e2m nh\u1eadp (IDS) c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 ph\u00e2n t\u00edch n\u00e0y b\u1eb1ng c\u00e1ch \u0111\u00e1nh d\u1ea5u c\u00e1c m\u1eabu l\u01b0u l\u01b0\u1ee3ng \u0111\u00e1ng ng\u1edd \u0111\u1ec3 ki\u1ec3m tra chi ti\u1ebft h\u01a1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-phong-chong-tan-cong-ARP-Spoofing-hieu-qua\"><\/span>C\u00e1ch ph\u00f2ng ch\u1ed1ng t\u1ea5n c\u00f4ng ARP Spoofing hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ph\u00f2ng ch\u1ed1ng <strong>t\u1ea5n c\u00f4ng ARP Spoofing<\/strong> kh\u00f4ng h\u1ec1 ph\u1ee9c t\u1ea1p. B\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng nhi\u1ec1u bi\u1ec7n ph\u00e1p kh\u00e1c nhau, t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Doi-voi-nguoi-dung-ca-nhan\"><\/span>\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng c\u00e1 nh\u00e2n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>S\u1eed d\u1ee5ng m\u1ea1ng VPN khi truy c\u1eadp Wi-Fi c\u00f4ng c\u1ed9ng:<\/strong> VPN t\u1ea1o ra m\u1ed9t \u0111\u01b0\u1eddng h\u1ea7m m\u00e3 h\u00f3a, b\u1ea3o v\u1ec7 to\u00e0n b\u1ed9 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u1ee7a b\u1ea1n kh\u1ecfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng Man-in-the-Middle.<\/li>\n<li><strong>C\u00e0i \u0111\u1eb7t ph\u1ea7n m\u1ec1m di\u1ec7t virus v\u00e0 b\u1ea3o m\u1eadt uy t\u00edn:<\/strong> C\u00e1c ph\u1ea7n m\u1ec1m n\u00e0y th\u01b0\u1eddng c\u00f3 t\u00ednh n\u0103ng gi\u00e1m s\u00e1t m\u1ea1ng v\u00e0 c\u1ea3nh b\u00e1o khi ph\u00e1t hi\u1ec7n ho\u1ea1t \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng.<\/li>\n<li><strong>Tr\u00e1nh truy c\u1eadp c\u00e1c trang web nh\u1ea1y c\u1ea3m khi d\u00f9ng m\u1ea1ng c\u00f4ng c\u1ed9ng:<\/strong> H\u1ea1n ch\u1ebf \u0111\u0103ng nh\u1eadp t\u00e0i kho\u1ea3n ng\u00e2n h\u00e0ng, email ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 quan tr\u1ecdng khi k\u1ebft n\u1ed1i v\u1edbi Wi-Fi mi\u1ec5n ph\u00ed.<\/li>\n<\/ul>\n<figure id=\"attachment_32963\" aria-describedby=\"caption-attachment-32963\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-32963\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-phong-chong-tan-cong-ARP-Spoofing-hieu-qua.jpg\" alt=\"C\u00e1ch ph\u00f2ng ch\u1ed1ng t\u1ea5n c\u00f4ng ARP Spoofing hi\u1ec7u qu\u1ea3\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-phong-chong-tan-cong-ARP-Spoofing-hieu-qua.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-phong-chong-tan-cong-ARP-Spoofing-hieu-qua-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-phong-chong-tan-cong-ARP-Spoofing-hieu-qua-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-32963\" class=\"wp-caption-text\">C\u00e1ch ph\u00f2ng ch\u1ed1ng t\u1ea5n c\u00f4ng ARP Spoofing hi\u1ec7u qu\u1ea3<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Doi-voi-Quan-tri-vien-mang\"><\/span>\u0110\u1ed1i v\u1edbi Qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>S\u1eed d\u1ee5ng ARP t\u0129nh (Static ARP) tr\u00ean c\u00e1c thi\u1ebft b\u1ecb quan tr\u1ecdng:<\/strong> B\u1eb1ng c\u00e1ch g\u00e1n th\u1ee7 c\u00f4ng \u0111\u1ecba ch\u1ec9 IP v\u00e0 MAC c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb quan tr\u1ecdng nh\u01b0 gateway, b\u1ea1n ng\u0103n ch\u1eb7n vi\u1ec7c b\u1ed9 nh\u1edb \u0111\u1ec7m ARP b\u1ecb \u0111\u1ea7u \u0111\u1ed9c. M\u1eb7c d\u00f9 t\u1ed1n th\u1eddi gian, \u0111\u00e2y l\u00e0 m\u1ed9t bi\u1ec7n ph\u00e1p hi\u1ec7u qu\u1ea3.<\/li>\n<li><strong>Tri\u1ec3n khai Dynamic ARP Inspection (DAI) tr\u00ean c\u00e1c switch:<\/strong> \u0110\u00e2y l\u00e0 m\u1ed9t t\u00ednh n\u0103ng b\u1ea3o m\u1eadt tr\u00ean c\u00e1c switch Cisco v\u00e0 nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c. DAI ki\u1ec3m tra v\u00e0 x\u00e1c th\u1ef1c c\u00e1c g\u00f3i tin ARP, lo\u1ea1i b\u1ecf c\u00e1c g\u00f3i tin gi\u1ea3 m\u1ea1o.<\/li>\n<li><strong>S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t v\u00e0 ph\u00e1t hi\u1ec7n t\u1ea5n c\u00f4ng m\u1ea1ng (IDS\/IPS):<\/strong> C\u00e1c h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp (IDS\/IPS) c\u00f3 th\u1ec3 gi\u00e1m s\u00e1t m\u1ea1ng li\u00ean t\u1ee5c v\u00e0 c\u1ea3nh b\u00e1o ho\u1eb7c ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ngay l\u1eadp t\u1ee9c.<\/li>\n<li><strong>Th\u01b0\u1eddng xuy\u00ean c\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m v\u00e0 thi\u1ebft b\u1ecb m\u1ea1ng:<\/strong> Lu\u00f4n c\u1eadp nh\u1eadt firmware cho router v\u00e0 switch, c\u0169ng nh\u01b0 c\u00e1c ph\u1ea7n m\u1ec1m b\u1ea3o m\u1eadt \u0111\u1ec3 v\u00e1 c\u00e1c l\u1ed7 h\u1ed5ng \u0111\u00e3 bi\u1ebft.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cac-cong-cu-ho-tro-phat-hien-tan-cong-ARP-Spoofing\"><\/span>C\u00e1c c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 ph\u00e1t hi\u1ec7n t\u1ea5n c\u00f4ng ARP Spoofing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00f3 nhi\u1ec1u c\u00f4ng c\u1ee5 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 h\u1ed7 tr\u1ee3 vi\u1ec7c ph\u00e1t hi\u1ec7n v\u00e0 ph\u00f2ng ch\u1ed1ng <strong>t\u1ea5n c\u00f4ng ARP Spoofing<\/strong>, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Wireshark:<\/strong> M\u1ed9t c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch g\u00f3i tin m\u1ea1ng m\u1ea1nh m\u1ebd, gi\u00fap b\u1ea1n xem v\u00e0 ki\u1ec3m tra c\u00e1c g\u00f3i tin ARP \u0111ang \u0111\u01b0\u1ee3c g\u1eedi trong m\u1ea1ng.<\/li>\n<li><strong>Arpwatch:<\/strong> M\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh gi\u00e1m s\u00e1t li\u00ean t\u1ee5c c\u00e1c thay \u0111\u1ed5i trong b\u1ed9 nh\u1edb \u0111\u1ec7m ARP v\u00e0 g\u1eedi c\u1ea3nh b\u00e1o khi ph\u00e1t hi\u1ec7n s\u1ef1 b\u1ea5t th\u01b0\u1eddng.<\/li>\n<li><strong>ARP-Guard:<\/strong> M\u1ed9t c\u00f4ng c\u1ee5 chuy\u00ean d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i t\u1ea5n c\u00f4ng ARP Spoofing b\u1eb1ng c\u00e1ch ki\u1ec3m tra c\u00e1c g\u00f3i tin v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c g\u00f3i gi\u1ea3 m\u1ea1o.<\/li>\n<\/ul>\n<p><strong>ARP Spoofing<\/strong> l\u00e0 m\u1ed9t m\u1ed1i \u0111e d\u1ecda th\u1ef1c s\u1ef1 \u0111\u1ed1i v\u1edbi m\u1ecdi ng\u01b0\u1eddi d\u00f9ng m\u1ea1ng, t\u1eeb c\u00e1 nh\u00e2n \u0111\u1ebfn doanh nghi\u1ec7p. Vi\u1ec7c hi\u1ec3u r\u00f5 b\u1ea3n ch\u1ea5t c\u1ee7a t\u1ea5n c\u00f4ng n\u00e0y v\u00e0 ch\u1ee7 \u0111\u1ed9ng \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ch\u1ed1ng l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u v\u00e0 h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong m\u1ea1ng m\u00e1y t\u00ednh, c\u00f3 nh\u1eefng m\u1ed1i \u0111e d\u1ecda th\u1ea7m l\u1eb7ng nh\u01b0ng l\u1ea1i c\u1ef1c k\u1ef3 nguy hi\u1ec3m. M\u1ed9t trong s\u1ed1 \u0111\u00f3 l\u00e0 t\u1ea5n c\u00f4ng ARP Spoofing, hay c\u00f2n g\u1ecdi l\u00e0 ARP poisoning. T\u1ea5n c\u00f4ng n\u00e0y c\u00f3 th\u1ec3 bi\u1ebfn m\u1ed9t m\u1ea1ng n\u1ed9i b\u1ed9 t\u01b0\u1edfng ch\u1eebng an to\u00e0n tr\u1edf th\u00e0nh m\u1ed9t b\u1eaby r\u00ecnh r\u1eadp, n\u01a1i m\u1ecdi d\u1eef<\/p>\n","protected":false},"author":11,"featured_media":32964,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[83],"tags":[],"class_list":["post-32953","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bao-mat-an-ninh-mang"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/32953","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\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=32953"}],"version-history":[{"count":4,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/32953\/revisions"}],"predecessor-version":[{"id":32966,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/32953\/revisions\/32966"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/32964"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=32953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=32953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=32953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}