{"id":20412,"date":"2024-12-25T14:20:51","date_gmt":"2024-12-25T07:20:51","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=20412"},"modified":"2026-01-27T09:05:58","modified_gmt":"2026-01-27T02:05:58","slug":"phuong-phap-bao-ve-vps-khoi-tan-cong-ddos","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/","title":{"rendered":"Top 10+ ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o v\u1ec7 VPS kh\u1ecfi t\u1ea5n c\u00f4ng DDoS c\u01a1 b\u1ea3n"},"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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Tan-cong-DDoS-la-gi\" >T\u1ea5n c\u00f4ng DDoS 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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Muc-dich-cua-tan-cong-DDoS\" >M\u1ee5c \u0111\u00edch c\u1ee7a t\u1ea5n c\u00f4ng DDoS<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Cac-loai-tan-cong-DDoS-pho-bien-nhat-hien-nay\" >C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng DDoS ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Tan-cong-SYN-Flood\" >T\u1ea5n c\u00f4ng SYN Flood<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Tan-cong-Slowloris\" >T\u1ea5n c\u00f4ng Slowloris<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Tan-cong-UDP-Flood\" >T\u1ea5n c\u00f4ng UDP Flood<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Smurf-Attack\" >Smurf Attack<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Tan-cong-APDoS-Advanced-Persistent-DoS\" >T\u1ea5n c\u00f4ng APDoS (Advanced Persistent DoS)<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Zero-day-DDoS-Attack\" >Zero-day DDoS Attack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#NTP-Amplification\" >NTP Amplification<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Tan-cong-HTTP-Flood\" >T\u1ea5n c\u00f4ng HTTP Flood<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Ping-of-Death\" >Ping of Death<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Fraggle-Attack\" >Fraggle Attack<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Tan-cong-cap-ung-dung-Application-Level-Attack\" >T\u1ea5n c\u00f4ng c\u1ea5p \u1ee9ng d\u1ee5ng (Application-Level Attack)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Dau-hieu-nhan-biet-VPS-dang-bi-tan-cong-DDoS\" >D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft VPS \u0111ang b\u1ecb t\u1ea5n c\u00f4ng DDoS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Hau-qua-cua-viec-VPS-bi-tan-cong-DDoS\" >H\u1eadu qu\u1ea3 c\u1ee7a vi\u1ec7c VPS b\u1ecb t\u1ea5n c\u00f4ng DDoS<\/a><\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Phuong-phap-bao-ve-VPS-khoi-tan-cong-DDoS\" >Ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o v\u1ec7 VPS kh\u1ecfi t\u1ea5n c\u00f4ng DDoS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Su-dung-phan-mem-chong-DDoS-cho-VPS\" >S\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m ch\u1ed1ng DDoS cho VPS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Tuong-lua-chong-DDoS-Firewall-Anti-DDoS\" >T\u01b0\u1eddng l\u1eeda ch\u1ed1ng DDoS (Firewall Anti-DDoS)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Thiet-bi-phan-cung-chong-DDoS\" >Thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng ch\u1ed1ng DDoS<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Tich-hop-Cloudflare-chong-DDoS\" >T\u00edch h\u1ee3p Cloudflare ch\u1ed1ng DDoS<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Su-dung-CDN-chong-DDoS\" >S\u1eed d\u1ee5ng CDN ch\u1ed1ng DDoS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Cau-hinh-CSF-Firewall-chong-DDoS\" >C\u1ea5u h\u00ecnh CSF Firewall ch\u1ed1ng DDoS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Ngan-thao-tac-tai-lai-lien-tuc\" >Ng\u0103n thao t\u00e1c t\u1ea3i l\u1ea1i li\u00ean t\u1ee5c<\/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\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Gioi-han-luu-luong-truy-cap\" >Gi\u1edbi h\u1ea1n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Bat-che-do-cache\" >B\u1eadt ch\u1ebf \u0111\u1ed9 cache<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/#Su-dung-bo-loc-goi-Packet-Filtering\" >S\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc g\u00f3i (Packet Filtering)<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>DDoS l\u00e0 m\u1ed9t trong nh\u1eefng m\u1ed1i \u0111e d\u1ecda h\u00e0ng \u0111\u1ea7u \u0111\u1ed1i v\u1edbi c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a> <a href=\"https:\/\/interdata.vn\/blog\/vps-la-gi\/\">VPS<\/a>. C\u00e1c cu\u1ed9c <a href=\"https:\/\/interdata.vn\/blog\/ddos-la-gi\/\">t\u1ea5n c\u00f4ng DDoS<\/a> c\u00f3 th\u1ec3 khi\u1ebfn h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n qu\u00e1 t\u1ea3i, l\u00e0m gi\u00e1n \u0111o\u1ea1n ho\u1ea1t \u0111\u1ed9ng v\u00e0 g\u00e2y t\u1ed5n th\u1ea5t l\u1edbn. V\u1eady l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 nh\u1eadn bi\u1ebft VPS \u0111ang b\u1ecb t\u1ea5n c\u00f4ng DDoS v\u00e0 c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/phuong-phap-bao-ve-vps-khoi-tan-cong-ddos\/\"><strong>ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o v\u1ec7 VPS kh\u1ecfi t\u1ea5n c\u00f4ng DDoS<\/strong><\/a> ra sao. H\u00e3y kh\u00e1m ph\u00e1 ngay \u0111\u1ec3 gi\u1eef cho h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n lu\u00f4n an to\u00e0n tr\u01b0\u1edbc c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tan-cong-DDoS-la-gi\"><\/span>T\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u1ea5n c\u00f4ng DDoS (Distributed Denial of Service) l\u00e0 m\u1ed9t <strong>ph\u01b0\u01a1ng th\u1ee9c t\u1ea5n c\u00f4ng m\u1ea1ng<\/strong>, trong \u0111\u00f3 k\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng nhi\u1ec1u thi\u1ebft b\u1ecb \u0111\u1ec3 g\u1eedi l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn nh\u1eb1m l\u00e0m gi\u00e1n \u0111o\u1ea1n truy c\u1eadp, t\u00ea li\u1ec7t h\u1ec7 th\u1ed1ng m\u00e1y ch\u1ee7 ho\u1eb7c d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn.<\/p>\n<p>Nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng DDoS kh\u00f4ng ch\u1ec9 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t, g\u00e2y t\u1eafc ngh\u1ebdn <a href=\"https:\/\/interdata.vn\/blog\/bang-thong-la-gi\/\">b\u0103ng th\u00f4ng<\/a> m\u00e0 c\u00f2n c\u00f3 th\u1ec3 khi\u1ebfn m\u00e1y ch\u1ee7 kh\u00f4ng kh\u1ea3 d\u1ee5ng v\u1edbi ng\u01b0\u1eddi d\u00f9ng h\u1ee3p ph\u00e1p.<\/p>\n<figure id=\"attachment_20415\" aria-describedby=\"caption-attachment-20415\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20415\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tan-cong-DDoS-la-gi-1.png\" alt=\"T\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec?\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tan-cong-DDoS-la-gi-1.png 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tan-cong-DDoS-la-gi-1-300x188.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tan-cong-DDoS-la-gi-1-768x480.png 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tan-cong-DDoS-la-gi-1-750x469.png 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-20415\" class=\"wp-caption-text\">T\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Muc-dich-cua-tan-cong-DDoS\"><\/span>M\u1ee5c \u0111\u00edch c\u1ee7a t\u1ea5n c\u00f4ng DDoS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ee5c \u0111\u00edch c\u1ee7a t\u1ea5n c\u00f4ng DDoS (Distributed Denial of Service) l\u00e0 l\u00e0m cho d\u1ecbch v\u1ee5 m\u1ea1ng, m\u00e1y ch\u1ee7 ho\u1eb7c \u1ee9ng d\u1ee5ng tr\u1edf n\u00ean kh\u00f4ng kh\u1ea3 d\u1ee5ng \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng h\u1ee3p ph\u00e1p. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 m\u1ee5c \u0111\u00edch c\u1ee5 th\u1ec3 c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS:<\/p>\n<ul>\n<li><strong>Gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 (Service Disruption)<\/strong>: M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a DDoS l\u00e0 l\u00e0m gi\u00e1n \u0111o\u1ea1n ho\u1eb7c ng\u1eebng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng ho\u1eb7c d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn, khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng h\u1ee3p ph\u00e1p kh\u00f4ng th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/website-la-gi\/\">website<\/a> th\u01b0\u01a1ng m\u1ea1i, c\u1ed5ng thanh to\u00e1n, v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/web-application-la-gi\/\">\u1ee9ng d\u1ee5ng web<\/a>.<\/li>\n<li><strong>T\u1ed1ng ti\u1ec1n<\/strong>: Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, k\u1ebb t\u1ea5n c\u00f4ng g\u1eedi c\u1ea3nh b\u00e1o y\u00eau c\u1ea7u n\u1ea1n nh\u00e2n tr\u1ea3 ti\u1ec1n chu\u1ed9c \u0111\u1ec3 tr\u00e1nh ho\u1eb7c ch\u1ea5m d\u1ee9t cu\u1ed9c t\u1ea5n c\u00f4ng. Nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn h\u01a1n khi c\u00e1c doanh nghi\u1ec7p ph\u1ee5 thu\u1ed9c nhi\u1ec1u v\u00e0o c\u00e1c d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn \u0111\u1ec3 duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<li><strong>Ph\u00e2n t\u00e1n s\u1ef1 ch\u00fa \u00fd<\/strong>: M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 \u0111\u00e1nh l\u1ea1c h\u01b0\u1edbng nh\u00f3m b\u1ea3o m\u1eadt c\u1ee7a n\u1ea1n nh\u00e2n, t\u1eeb \u0111\u00f3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u ho\u1eb7c c\u00e0i m\u00e3 \u0111\u1ed9c.<\/li>\n<li><strong>C\u1ea1nh tranh kh\u00f4ng l\u00e0nh m\u1ea1nh<\/strong>: C\u00e1c \u0111\u1ed1i th\u1ee7 trong kinh doanh c\u00f3 th\u1ec3 l\u1ee3i d\u1ee5ng DDoS \u0111\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t c\u1ee7a \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh, g\u00e2y m\u1ea5t uy t\u00edn v\u00e0 l\u00e0m t\u1ed5n th\u1ea5t doanh thu.<\/li>\n<li><strong>\u0110\u1ed9ng c\u01a1 ch\u00ednh tr\u1ecb ho\u1eb7c \u00fd th\u1ee9c h\u1ec7 (Hacktivism)<\/strong>: C\u00e1c nh\u00f3m tin t\u1eb7c c\u00f3 \u0111\u1ed9ng c\u01a1 ch\u00ednh tr\u1ecb ho\u1eb7c x\u00e3 h\u1ed9i c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n DDoS \u0111\u1ec3 ph\u1ea3n \u0111\u1ed1i ho\u1eb7c g\u00e2y \u00e1p l\u1ef1c l\u00ean ch\u00ednh ph\u1ee7, t\u1ed5 ch\u1ee9c ho\u1eb7c doanh nghi\u1ec7p. Nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y th\u01b0\u1eddng nh\u1eb1m truy\u1ec1n t\u1ea3i th\u00f4ng \u0111i\u1ec7p ho\u1eb7c t\u1ea1o \u1ea3nh h\u01b0\u1edfng v\u1ec1 m\u1eb7t truy\u1ec1n th\u00f4ng.<\/li>\n<li><strong>Th\u1eed nghi\u1ec7m v\u00e0 \u0111\u00e0o t\u1ea1o<\/strong>: M\u1ed9t s\u1ed1 t\u1ea5n c\u00f4ng DDoS \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u01b0 c\u00e1c b\u00e0i ki\u1ec3m tra ho\u1eb7c \u0111\u00e0o t\u1ea1o cho h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt ho\u1eb7c nh\u1eb1m m\u1ee5c \u0111\u00edch nghi\u00ean c\u1ee9u, t\u00ecm hi\u1ec3u kh\u1ea3 n\u0103ng ph\u1ea3n \u1ee9ng c\u1ee7a h\u1ec7 th\u1ed1ng tr\u01b0\u1edbc c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng.<\/li>\n<\/ul>\n<p>T\u1ea5n c\u00f4ng DDoS l\u00e0 m\u1ed9t m\u1ed1i \u0111e d\u1ecda nghi\u00eam tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c t\u1ed5 ch\u1ee9c v\u00e0 c\u00e1 nh\u00e2n, vi\u1ec7c hi\u1ec3u r\u00f5 m\u1ee5c \u0111\u00edch c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y s\u1ebd gi\u00fap ch\u00fang ta c\u00f3 bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba v\u00e0 \u1ee9ng ph\u00f3 hi\u1ec7u qu\u1ea3.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-loai-tan-cong-DDoS-pho-bien-nhat-hien-nay\"><\/span>C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng DDoS ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Tan-cong-SYN-Flood\"><\/span>T\u1ea5n c\u00f4ng SYN Flood<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1ea5n c\u00f4ng n\u00e0y l\u1ee3i d\u1ee5ng \u0111i\u1ec3m y\u1ebfu trong qu\u00e1 tr\u00ecnh k\u1ebft n\u1ed1i TCP (Three-way handshake). M\u00e1y ch\u1ee7 nh\u1eadn m\u1ed9t y\u00eau c\u1ea7u k\u1ebft n\u1ed1i t\u1eeb ngu\u1ed3n gi\u1ea3 m\u1ea1o nh\u01b0ng kh\u00f4ng bao gi\u1edd ho\u00e0n t\u1ea5t qu\u00e1 tr\u00ecnh, d\u1eabn \u0111\u1ebfn vi\u1ec7c m\u00e1y ch\u1ee7 ph\u1ea3i duy tr\u00ec c\u00e1c k\u1ebft n\u1ed1i kh\u00f4ng c\u1ea7n thi\u1ebft, g\u00e2y qu\u00e1 t\u1ea3i v\u00e0 gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tan-cong-Slowloris\"><\/span>T\u1ea5n c\u00f4ng Slowloris<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng \u00edt t\u00e0i nguy\u00ean nh\u01b0ng c\u00f3 th\u1ec3 l\u00e0m gi\u00e1n \u0111o\u1ea1n <a href=\"https:\/\/interdata.vn\/blog\/web-server\/\">m\u00e1y ch\u1ee7 web<\/a>. Hacker m\u1edf k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 v\u00e0 gi\u1eef k\u1ebft n\u1ed1i \u0111\u00f3 m\u1edf c\u00e0ng l\u00e2u c\u00e0ng t\u1ed1t b\u1eb1ng c\u00e1ch g\u1eedi y\u00eau c\u1ea7u HTTP nh\u1ecf gi\u1ecdt, khi\u1ebfn m\u00e1y ch\u1ee7 kh\u00f4ng th\u1ec3 x\u1eed l\u00fd y\u00eau c\u1ea7u kh\u00e1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tan-cong-UDP-Flood\"><\/span>T\u1ea5n c\u00f4ng UDP Flood<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 h\u00ecnh th\u1ee9c t\u1ea5n c\u00f4ng b\u1eb1ng c\u00e1ch g\u1eedi nhi\u1ec1u g\u00f3i tin UDP (User Datagram Protocol) \u0111\u1ebfn c\u00e1c c\u1ed5ng ng\u1eabu nhi\u00ean tr\u00ean m\u00e1y t\u00ednh ho\u1eb7c m\u1ea1ng. M\u00e1y ch\u1ee7 ph\u1ea3i ki\u1ec3m tra c\u00e1c c\u1ed5ng n\u00e0y nh\u01b0ng kh\u00f4ng t\u00ecm th\u1ea5y \u1ee9ng d\u1ee5ng n\u00e0o \u0111ang l\u1eafng nghe, g\u00e2y l\u00e3ng ph\u00ed t\u00e0i nguy\u00ean v\u00e0 l\u00e0m ch\u1eadm h\u1ec7 th\u1ed1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Smurf-Attack\"><\/span>Smurf Attack<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1ea5n c\u00f4ng n\u00e0y l\u1ee3i d\u1ee5ng <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a> v\u00e0 giao th\u1ee9c ICMP. K\u1ebb t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 IP v\u00e0 g\u1eedi c\u00e1c y\u00eau c\u1ea7u ping \u0111\u1ebfn nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP tr\u00ean m\u1ed9t m\u1ea1ng. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn vi\u1ec7c t\u1ea5t c\u1ea3 c\u00e1c m\u00e1y trong m\u1ea1ng ph\u1ea3n h\u1ed3i, g\u00e2y qu\u00e1 t\u1ea3i h\u1ec7 th\u1ed1ng m\u1ee5c ti\u00eau.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tan-cong-APDoS-Advanced-Persistent-DoS\"><\/span>T\u1ea5n c\u00f4ng APDoS (Advanced Persistent DoS)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t d\u1ea1ng t\u1ea5n c\u00f4ng c\u00f3 ch\u1ee7 \u0111\u00edch g\u00e2y thi\u1ec7t h\u1ea1i l\u1edbn. N\u00f3 k\u1ebft h\u1ee3p nhi\u1ec1u k\u1ef9 thu\u1eadt t\u1ea5n c\u00f4ng kh\u00e1c nhau nh\u01b0 HTTP Flood, SYN Flood, v\u1edbi kh\u1ea3 n\u0103ng g\u1eedi h\u00e0ng tri\u1ec7u y\u00eau c\u1ea7u m\u1ed7i gi\u00e2y. Nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y c\u00f3 th\u1ec3 k\u00e9o d\u00e0i trong nhi\u1ec1u tu\u1ea7n, l\u00e0m qu\u00e1 t\u1ea3i h\u1ec7 th\u1ed1ng v\u00e0 g\u00e2y gi\u00e1n \u0111o\u1ea1n nghi\u00eam tr\u1ecdng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Zero-day-DDoS-Attack\"><\/span>Zero-day DDoS Attack<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng l\u1ee3i d\u1ee5ng c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/lo-hong-bao-mat-la-gi\/\">l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt<\/a> ch\u01b0a \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n v\u00e0 v\u00e1 l\u1ed7i. Zero-day DDoS nh\u1eafm v\u00e0o nh\u1eefng \u0111i\u1ec3m y\u1ebfu m\u1edbi, t\u1ea1o ra th\u00e1ch th\u1ee9c l\u1edbn cho h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt, v\u00ec ch\u00fang th\u01b0\u1eddng x\u1ea3y ra tr\u01b0\u1edbc khi c\u00f3 gi\u1ea3i ph\u00e1p ph\u00f2ng ng\u1eeba.<\/p>\n<figure id=\"attachment_20416\" aria-describedby=\"caption-attachment-20416\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20416\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cac-loai-tan-cong-DDoS-pho-bien-nhat-hien-nay.jpg\" alt=\"C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng DDoS ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay\" width=\"800\" height=\"538\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cac-loai-tan-cong-DDoS-pho-bien-nhat-hien-nay.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cac-loai-tan-cong-DDoS-pho-bien-nhat-hien-nay-300x202.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cac-loai-tan-cong-DDoS-pho-bien-nhat-hien-nay-768x516.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cac-loai-tan-cong-DDoS-pho-bien-nhat-hien-nay-750x504.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-20416\" class=\"wp-caption-text\">C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng DDoS ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"NTP-Amplification\"><\/span>NTP Amplification<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1ea5n c\u00f4ng n\u00e0y khai th\u00e1c c\u00e1c m\u00e1y ch\u1ee7 NTP (Network Time Protocol), v\u1ed1n \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u1ed3ng b\u1ed9 th\u1eddi gian m\u1ea1ng. K\u1ebb t\u1ea5n c\u00f4ng g\u1eedi y\u00eau c\u1ea7u nh\u1ecf nh\u01b0ng k\u1ebft qu\u1ea3 nh\u1eadn l\u1ea1i l\u00e0 ph\u1ea3n h\u1ed3i l\u1edbn h\u01a1n t\u1eeb m\u00e1y ch\u1ee7 \u0111\u1ebfn m\u1ed9t IP gi\u1ea3 m\u1ea1o. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn s\u1ef1 gia t\u0103ng l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng, g\u00e2y qu\u00e1 t\u1ea3i v\u00e0 t\u1eafc ngh\u1ebdn b\u0103ng th\u00f4ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tan-cong-HTTP-Flood\"><\/span>T\u1ea5n c\u00f4ng HTTP Flood<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1ea5n c\u00f4ng n\u00e0y s\u1eed d\u1ee5ng c\u00e1c y\u00eau c\u1ea7u h\u1ee3p l\u1ec7 (GET ho\u1eb7c <a href=\"https:\/\/interdata.vn\/blog\/post-la-gi\/\">POST<\/a>) \u0111\u1ec3 l\u00e0m qu\u00e1 t\u1ea3i m\u00e1y ch\u1ee7. M\u1eb7c d\u00f9 n\u00f3 s\u1eed d\u1ee5ng \u00edt b\u0103ng th\u00f4ng h\u01a1n c\u00e1c h\u00ecnh th\u1ee9c kh\u00e1c, nh\u01b0ng c\u00f3 th\u1ec3 bu\u1ed9c m\u00e1y ch\u1ee7 ph\u1ea3i s\u1eed d\u1ee5ng h\u1ebft t\u00e0i nguy\u00ean, g\u00e2y ra t\u00ecnh tr\u1ea1ng kh\u00f4ng th\u1ec3 ph\u1ee5c v\u1ee5 y\u00eau c\u1ea7u th\u1ef1c s\u1ef1 t\u1eeb ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ping-of-Death\"><\/span>Ping of Death<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u01b0\u01a1ng th\u1ee9c n\u00e0y g\u1eedi c\u00e1c g\u00f3i tin IP ch\u1ee9a m\u00e3 \u0111\u1ed9c ho\u1eb7c c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n m\u1ee9c cho ph\u00e9p, g\u00e2y ra l\u1ed7i nghi\u00eam tr\u1ecdng ho\u1eb7c l\u00e0m s\u1eadp h\u1ec7 th\u1ed1ng m\u1ee5c ti\u00eau.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Fraggle-Attack\"><\/span>Fraggle Attack<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1ea5n c\u00f4ng n\u00e0y t\u01b0\u01a1ng t\u1ef1 nh\u01b0 Smurf Attack nh\u01b0ng thay v\u00ec s\u1eed d\u1ee5ng ICMP, n\u00f3 s\u1eed d\u1ee5ng c\u00e1c g\u00f3i tin UDP \u0111\u1ec3 g\u1eedi m\u1ed9t l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u v\u00e0o m\u1ea1ng ph\u00e1t s\u00f3ng c\u1ee7a <a href=\"https:\/\/interdata.vn\/blog\/router-la-gi\/\">router<\/a>, g\u00e2y ra s\u1ef1 qu\u00e1 t\u1ea3i.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tan-cong-cap-ung-dung-Application-Level-Attack\"><\/span>T\u1ea5n c\u00f4ng c\u1ea5p \u1ee9ng d\u1ee5ng (Application-Level Attack)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Lo\u1ea1i t\u1ea5n c\u00f4ng n\u00e0y nh\u1eafm v\u00e0o c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, thay v\u00ec to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng m\u00e1y ch\u1ee7. M\u1ee5c ti\u00eau l\u00e0 khai th\u00e1c c\u00e1c \u0111i\u1ec3m y\u1ebfu \u0111\u00e3 \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn trong c\u00e1c \u1ee9ng d\u1ee5ng, g\u00e2y ra s\u1ef1 gi\u00e1n \u0111o\u1ea1n trong ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u1ee9ng d\u1ee5ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Dau-hieu-nhan-biet-VPS-dang-bi-tan-cong-DDoS\"><\/span>D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft VPS \u0111ang b\u1ecb t\u1ea5n c\u00f4ng DDoS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng d\u1ea5u hi\u1ec7u cho th\u1ea5y m\u00e1y ch\u1ee7 VPS c\u1ee7a b\u1ea1n \u0111ang b\u1ecb t\u1ea5n c\u00f4ng DDoS:<\/p>\n<ul>\n<li>M\u1ea1ng tr\u1edf n\u00ean ch\u1eadm khi truy c\u1eadp v\u00e0o website ho\u1eb7c m\u1edf t\u1ec7p.<\/li>\n<li>Nh\u1eadn \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng l\u1edbn email spam m\u1ed9t c\u00e1ch b\u1ea5t th\u01b0\u1eddng.<\/li>\n<li>Kh\u00f4ng th\u1ec3 truy c\u1eadp v\u00e0o website ho\u1eb7c m\u00e1y ch\u1ee7 VPS\/Server.<\/li>\n<\/ul>\n<figure id=\"attachment_20417\" aria-describedby=\"caption-attachment-20417\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20417\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cach-nhan-biet-VPS-dang-bi-tan-cong-DDoS.png\" alt=\"C\u00e1ch nh\u1eadn bi\u1ebft VPS \u0111ang b\u1ecb t\u1ea5n c\u00f4ng DDoS\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cach-nhan-biet-VPS-dang-bi-tan-cong-DDoS.png 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cach-nhan-biet-VPS-dang-bi-tan-cong-DDoS-300x188.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cach-nhan-biet-VPS-dang-bi-tan-cong-DDoS-768x480.png 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cach-nhan-biet-VPS-dang-bi-tan-cong-DDoS-750x469.png 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-20417\" class=\"wp-caption-text\">C\u00e1ch nh\u1eadn bi\u1ebft VPS \u0111ang b\u1ecb t\u1ea5n c\u00f4ng DDoS<\/figcaption><\/figure>\n<p>Nh\u1eefng tri\u1ec7u ch\u1ee9ng tr\u00ean c\u00f3 th\u1ec3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o v\u1ec1 m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111ang di\u1ec5n ra, v\u00e0 b\u1ea1n n\u00ean c\u00f3 bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 ngay l\u1eadp t\u1ee9c \u0111\u1ec3 tr\u00e1nh thi\u1ec7t h\u1ea1i l\u1edbn h\u01a1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Hau-qua-cua-viec-VPS-bi-tan-cong-DDoS\"><\/span>H\u1eadu qu\u1ea3 c\u1ee7a vi\u1ec7c VPS b\u1ecb t\u1ea5n c\u00f4ng DDoS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng h\u1eadu qu\u1ea3 \u0111i\u1ec3n h\u00ecnh c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS:<\/p>\n<ul>\n<li><strong>S\u1eadp h\u1ec7 th\u1ed1ng<\/strong>: M\u00e1y ch\u1ee7 VPS ho\u1eb7c website b\u1ecb s\u1eadp, khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng th\u1ec3 truy c\u1eadp, l\u00e0m gi\u00e1n \u0111o\u1ea1n ho\u1ea1t \u0111\u1ed9ng c\u1ee7a doanh nghi\u1ec7p.<\/li>\n<li><strong>M\u1ea5t doanh thu<\/strong>: Doanh nghi\u1ec7p kh\u00f4ng ch\u1ec9 m\u1ea5t doanh thu t\u1eeb vi\u1ec7c gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 m\u00e0 c\u00f2n ph\u1ea3i t\u1ed1n th\u00eam chi ph\u00ed \u0111\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1.<\/li>\n<li><strong>Gi\u00e1n \u0111o\u1ea1n c\u00f4ng vi\u1ec7c<\/strong>: Khi m\u1ea1ng b\u1ecb s\u1eadp, c\u00e1c c\u00f4ng vi\u1ec7c li\u00ean quan \u0111\u1ebfn <a href=\"https:\/\/interdata.vn\/blog\/mang-internet\/\">internet<\/a> kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n, \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c.<\/li>\n<li><strong>Suy gi\u1ea3m uy t\u00edn<\/strong>: Vi\u1ec7c website kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng l\u00e0m gi\u1ea3m l\u00f2ng tin c\u1ee7a kh\u00e1ch h\u00e0ng. N\u1ebfu t\u00ecnh tr\u1ea1ng k\u00e9o d\u00e0i, doanh nghi\u1ec7p c\u00f3 nguy c\u01a1 m\u1ea5t kh\u00e1ch h\u00e0ng v\u00e0o tay \u0111\u1ed1i th\u1ee7.<\/li>\n<li><strong>Nguy c\u01a1 \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u<\/strong>: C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS tinh vi c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c l\u1ea5y c\u1eafp ti\u1ec1n ho\u1eb7c d\u1eef li\u1ec7u kh\u00e1ch h\u00e0ng, g\u00e2y t\u1ed5n th\u1ea5t nghi\u00eam tr\u1ecdng cho doanh nghi\u1ec7p.<\/li>\n<\/ul>\n<p>Vi\u1ec7c ph\u00f2ng ng\u1eeba v\u00e0 ph\u1ea3n \u1ee9ng k\u1ecbp th\u1eddi tr\u01b0\u1edbc c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o v\u1ec7 ho\u1ea1t \u0111\u1ed9ng v\u00e0 danh ti\u1ebfng c\u1ee7a doanh nghi\u1ec7p.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Phuong-phap-bao-ve-VPS-khoi-tan-cong-DDoS\"><\/span>Ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o v\u1ec7 VPS kh\u1ecfi t\u1ea5n c\u00f4ng DDoS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS c\u00f3 th\u1ec3 g\u00e2y thi\u1ec7t h\u1ea1i nghi\u00eam tr\u1ecdng, v\u00ec v\u1eady vi\u1ec7c b\u1ea3o v\u1ec7 VPS v\u00e0 server kh\u1ecfi DDoS l\u00e0 \u0111i\u1ec1u v\u00f4 c\u00f9ng quan tr\u1ecdng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 \u0111\u1ec3 ch\u1ed1ng DDoS:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Su-dung-phan-mem-chong-DDoS-cho-VPS\"><\/span>S\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m ch\u1ed1ng DDoS cho VPS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/interdata.vn\/blog\/phan-mem-chong-ddos\/\">Ph\u1ea7n m\u1ec1m ch\u1ed1ng DDoS<\/a> ho\u1ea1t \u0111\u1ed9ng tr\u00ean ph\u1ea7n c\u1ee9ng hi\u1ec7n c\u00f3, gi\u00fap ph\u00e2n t\u00edch v\u00e0 l\u1ecdc l\u01b0u l\u01b0\u1ee3ng \u0111\u1ed9c h\u1ea1i. So v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o v\u1ec7 VPS kh\u1ecfi t\u1ea5n c\u00f4ng DDoS d\u1ef1a tr\u00ean ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m n\u00e0y ti\u1ebft ki\u1ec7m chi ph\u00ed h\u01a1n v\u00e0 d\u1ec5 d\u00e0ng qu\u1ea3n l\u00fd h\u01a1n.<\/p>\n<figure id=\"attachment_20418\" aria-describedby=\"caption-attachment-20418\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20418\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Su-dung-phan-mem-chong-DDoS-cho-VPS.jpg\" alt=\"S\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m ch\u1ed1ng DDoS cho VPS\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Su-dung-phan-mem-chong-DDoS-cho-VPS.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Su-dung-phan-mem-chong-DDoS-cho-VPS-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Su-dung-phan-mem-chong-DDoS-cho-VPS-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Su-dung-phan-mem-chong-DDoS-cho-VPS-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-20418\" class=\"wp-caption-text\">S\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m ch\u1ed1ng DDoS cho VPS<\/figcaption><\/figure>\n<p>Tuy nhi\u00ean, ph\u1ea7n m\u1ec1m v\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p d\u1ef1a tr\u00ean t\u1eadp l\u1ec7nh ch\u1ec9 b\u1ea3o v\u1ec7 m\u1ed9t ph\u1ea7n h\u1ec7 th\u1ed1ng v\u00e0 c\u00f3 th\u1ec3 kh\u00f3 \u0111\u1ed1i ph\u00f3 v\u1edbi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS quy m\u00f4 l\u1edbn. Ph\u1ea7n m\u1ec1m c\u00e0i \u0111\u1eb7t c\u1ee5c b\u1ed9 c\u00f3 th\u1ec3 b\u1ecb qu\u00e1 t\u1ea3i, \u0111\u1eb7c bi\u1ec7t l\u00e0 so v\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p d\u1ef1a tr\u00ean n\u1ec1n t\u1ea3ng \u0111\u00e1m m\u00e2y, v\u1ed1n c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng t\u1ed1t h\u01a1n khi \u0111\u1ed1i m\u1eb7t v\u1edbi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng l\u1edbn.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tuong-lua-chong-DDoS-Firewall-Anti-DDoS\"><\/span>T\u01b0\u1eddng l\u1eeda ch\u1ed1ng DDoS (Firewall Anti-DDoS)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS th\u01b0\u1eddng t\u00ecm c\u00e1ch l\u00e0m ng\u1eadp m\u00e1y ch\u1ee7 ho\u1eb7c <a href=\"https:\/\/interdata.vn\/blog\/tuong-lua-firewall\/\">t\u01b0\u1eddng l\u1eeda<\/a> b\u1eb1ng m\u1ed9t l\u01b0\u1ee3ng l\u1edbn y\u00eau c\u1ea7u t\u01b0\u1edfng ch\u1eebng h\u1ee3p ph\u00e1p. T\u01b0\u1eddng l\u1eeda truy\u1ec1n th\u1ed1ng g\u1eb7p kh\u00f3 kh\u0103n trong vi\u1ec7c ch\u1eb7n \u0111\u1ee9ng nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y, th\u1eadm ch\u00ed c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh \u0111i\u1ec3m ngh\u1ebdn, khi\u1ebfn t\u00ecnh tr\u1ea1ng t\u1ea5n c\u00f4ng t\u1ed3i t\u1ec7 h\u01a1n.<\/p>\n<figure id=\"attachment_20419\" aria-describedby=\"caption-attachment-20419\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20419\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tuong-lua-chong-DDoS-Firewall-Anti-DDoS.jpg\" alt=\"T\u01b0\u1eddng l\u1eeda ch\u1ed1ng DDoS (Firewall Anti-DDoS)\" width=\"800\" height=\"569\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tuong-lua-chong-DDoS-Firewall-Anti-DDoS.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tuong-lua-chong-DDoS-Firewall-Anti-DDoS-300x213.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tuong-lua-chong-DDoS-Firewall-Anti-DDoS-768x546.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tuong-lua-chong-DDoS-Firewall-Anti-DDoS-120x86.jpg 120w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tuong-lua-chong-DDoS-Firewall-Anti-DDoS-350x250.jpg 350w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tuong-lua-chong-DDoS-Firewall-Anti-DDoS-750x533.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-20419\" class=\"wp-caption-text\">T\u01b0\u1eddng l\u1eeda ch\u1ed1ng DDoS (Firewall Anti-DDoS)<\/figcaption><\/figure>\n<p>\u0110\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c \u0111i\u1ec3m y\u1ebfu c\u1ee7a t\u01b0\u1eddng l\u1eeda truy\u1ec1n th\u1ed1ng, vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a c\u1ea5u h\u00ecnh, tri\u1ec3n khai t\u01b0\u1eddng l\u1eeda ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng m\u1ea1ng, v\u00e0 s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n\/ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp (IPS\/IDS) c\u00f3 th\u1ec3 gi\u00fap c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7.<\/p>\n<p>Tuy nhi\u00ean, ngay c\u1ea3 khi t\u01b0\u1eddng l\u1eeda \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh t\u1ed1i \u01b0u, ch\u00fang v\u1eabn c\u00f3 th\u1ec3 g\u1eb7p kh\u00f3 kh\u0103n tr\u01b0\u1edbc c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng nh\u1eafm v\u00e0o l\u1edbp \u1ee9ng d\u1ee5ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Thiet-bi-phan-cung-chong-DDoS\"><\/span>Thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng ch\u1ed1ng DDoS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u1ea7n c\u1ee9ng ch\u1ed1ng DDoS \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 v\u1eadt l\u00fd, <strong>ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tr\u01b0\u1edbc khi ch\u00fang x\u00e2m nh\u1eadp v\u00e0o m\u1ea1ng<\/strong> c\u1ee7a b\u1ea1n. M\u1eb7c d\u00f9 gi\u1ea3i ph\u00e1p n\u00e0y gi\u00fap b\u1ea3o v\u1ec7 kh\u1ecfi nhi\u1ec1u lo\u1ea1i t\u1ea5n c\u00f4ng, nh\u01b0ng c\u00f3 nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng, nh\u01b0 t\u1ea5n c\u00f4ng <a href=\"https:\/\/interdata.vn\/blog\/dns-la-gi\/\">DNS<\/a>, kh\u00f4ng b\u1ecb ng\u0103n ch\u1eb7n v\u00ec thi\u1ec7t h\u1ea1i x\u1ea3y ra tr\u01b0\u1edbc khi l\u01b0u l\u01b0\u1ee3ng \u0111\u1ebfn thi\u1ebft b\u1ecb.<\/p>\n<p>Vi\u1ec7c duy tr\u00ec ph\u1ea7n c\u1ee9ng ch\u1ed1ng DDoS c\u00f3 th\u1ec3 t\u1ed1n k\u00e9m. Ngo\u00e0i chi ph\u00ed \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u, b\u1ea1n c\u00f2n c\u1ea7n chi tr\u1ea3 cho vi\u1ec7c v\u1eadn h\u00e0nh, b\u1ea3o tr\u00ec, v\u00e0 s\u1eeda ch\u1eefa thi\u1ebft b\u1ecb, c\u00f9ng v\u1edbi c\u00e1c kho\u1ea3n chi ph\u00ed li\u00ean quan \u0111\u1ebfn kh\u1ea5u hao v\u00e0 n\u00e2ng c\u1ea5p ph\u1ea7n c\u1ee9ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tich-hop-Cloudflare-chong-DDoS\"><\/span>T\u00edch h\u1ee3p Cloudflare ch\u1ed1ng DDoS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/interdata.vn\/blog\/cloudflare-la-gi\/\">CloudFlare<\/a> l\u00e0 d\u1ecbch v\u1ee5 DNS mi\u1ec5n ph\u00ed t\u00edch h\u1ee3p <a href=\"https:\/\/interdata.vn\/blog\/cdn-la-gi\/\">CDN<\/a>, gi\u00fap <strong>k\u1ebft n\u1ed1i ng\u01b0\u1eddi d\u00f9ng v\u1edbi m\u00e1y ch\u1ee7 qua m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 c\u1ee7a CloudFlare<\/strong>. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 ng\u01b0\u1eddi d\u00f9ng ph\u1ea3i truy c\u1eadp th\u00f4ng qua m\u00e1y ch\u1ee7 CloudFlare tr\u01b0\u1edbc khi v\u00e0o website c\u1ee7a b\u1ea1n.<\/p>\n<figure id=\"attachment_20421\" aria-describedby=\"caption-attachment-20421\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20421\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tich-hop-Cloudflare-chong-DDoS.jpg\" alt=\"T\u00edch h\u1ee3p Cloudflare ch\u1ed1ng DDoS\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tich-hop-Cloudflare-chong-DDoS.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tich-hop-Cloudflare-chong-DDoS-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tich-hop-Cloudflare-chong-DDoS-768x480.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Tich-hop-Cloudflare-chong-DDoS-750x469.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-20421\" class=\"wp-caption-text\">T\u00edch h\u1ee3p Cloudflare ch\u1ed1ng DDoS<\/figcaption><\/figure>\n<p>\u0110\u1ec3 b\u1ea3o v\u1ec7 VPS kh\u1ecfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, b\u1ea1n c\u1ea7n chuy\u1ec3n h\u01b0\u1edbng <a href=\"https:\/\/interdata.vn\/blog\/domain-la-gi\/\">t\u00ean mi\u1ec1n<\/a> c\u1ee7a m\u00ecnh sang CloudFlare. CloudFlare c\u00f3 th\u1ec3 x\u1eed l\u00fd t\u1ed1t c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS quy m\u00f4 nh\u1ecf v\u00e0 v\u1eeba, nh\u01b0ng khi \u0111\u1ed1i m\u1eb7t v\u1edbi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng l\u1edbn, CloudFlare c\u00f3 th\u1ec3 t\u1ea1m kh\u00f3a website c\u1ee7a b\u1ea1n \u0111\u1ec3 b\u1ea3o v\u1ec7 t\u00e0i nguy\u00ean h\u1ec7 th\u1ed1ng c\u1ee7a h\u1ecd.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Su-dung-CDN-chong-DDoS\"><\/span>S\u1eed d\u1ee5ng CDN ch\u1ed1ng DDoS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>CDN gi\u00fap \u1ea9n \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7, l\u00e0m cho k\u1ebb t\u1ea5n c\u00f4ng kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u00e1y ch\u1ee7 g\u1ed1c. V\u1edbi m\u1ea1ng l\u01b0\u1edbi m\u00e1y ch\u1ee7 r\u1ed9ng kh\u1eafp, CDN ph\u00e2n t\u00e1n \u0111\u1ecba ch\u1ec9 IP truy c\u1eadp, khi\u1ebfn c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f3 nh\u1eafm m\u1ee5c ti\u00eau ch\u00ednh x\u00e1c.<\/p>\n<p>B\u00ean c\u1ea1nh \u0111\u00f3, CDN c\u00f2n gi\u1ea3m thi\u1ec3u t\u1ea5n c\u00f4ng DDoS b\u1eb1ng c\u00e1ch ph\u00e2n t\u00e1n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp qua nhi\u1ec1u m\u00e1y ch\u1ee7. Nh\u1edd \u0111\u00f3, m\u1ed7i m\u00e1y ch\u1ee7 ch\u1ec9 x\u1eed l\u00fd m\u1ed9t ph\u1ea7n nh\u1ecf l\u01b0u l\u01b0\u1ee3ng, gi\u00fap ng\u0103n ch\u1eb7n t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i cho m\u00e1y ch\u1ee7 g\u1ed1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cau-hinh-CSF-Firewall-chong-DDoS\"><\/span>C\u1ea5u h\u00ecnh CSF Firewall ch\u1ed1ng DDoS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u00ean c\u1ea1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o v\u1ec7 VPS kh\u1ecfi t\u1ea5n c\u00f4ng DDoS kh\u00e1c, c\u1ea5u h\u00ecnh <a href=\"https:\/\/interdata.vn\/blog\/csf-firewall-la-gi\/\">CSF Firewall<\/a> l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u qu\u1ea3 gi\u00fap b\u1ea3o v\u1ec7 VPS.<\/p>\n<p>CSF Firewall, d\u1ef1a tr\u00ean <a href=\"https:\/\/interdata.vn\/blog\/iptables-la-gi\/\">iptables<\/a> v\u00e0 mi\u1ec5n ph\u00ed, ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch <strong>qu\u00e9t file log v\u00e0 ph\u00e1t hi\u1ec7n d\u1ea5u hi\u1ec7u c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS<\/strong> m\u00e0 kh\u00f4ng t\u1ed1n nhi\u1ec1u t\u00e0i nguy\u00ean c\u1ee7a VPS. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap ch\u1ed1ng DDoS m\u00e0 c\u00f2n t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng c\u1ee7a VPS.<\/p>\n<figure id=\"attachment_20420\" aria-describedby=\"caption-attachment-20420\" style=\"width: 825px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20420\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cau-hinh-CSF-Firewall-chong-DDoS.webp\" alt=\"C\u1ea5u h\u00ecnh CSF Firewall ch\u1ed1ng DDoS\" width=\"825\" height=\"407\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cau-hinh-CSF-Firewall-chong-DDoS.webp 825w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cau-hinh-CSF-Firewall-chong-DDoS-300x148.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cau-hinh-CSF-Firewall-chong-DDoS-768x379.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Cau-hinh-CSF-Firewall-chong-DDoS-750x370.webp 750w\" sizes=\"auto, (max-width: 825px) 100vw, 825px\" \/><figcaption id=\"caption-attachment-20420\" class=\"wp-caption-text\">C\u1ea5u h\u00ecnh CSF Firewall ch\u1ed1ng DDoS<\/figcaption><\/figure>\n<p>Khi k\u00edch ho\u1ea1t CSF Firewall, b\u1ea1n c\u00f3 th\u1ec3 ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, ng\u0103n ch\u1eb7n IP Syn flood, IP Ping flood, IP \u0111ang qu\u00e9t c\u1ed5ng, ch\u1ed1ng <a href=\"https:\/\/interdata.vn\/blog\/tan-cong-brute-force-la-gi\/\">Brute Force<\/a>, v\u00e0 h\u1ed7 tr\u1ee3 c\u1ea3 <a href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/\">IPv4<\/a> v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/ipv6-la-gi\/\">IPv6<\/a>, mang l\u1ea1i kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 to\u00e0n di\u1ec7n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ngan-thao-tac-tai-lai-lien-tuc\"><\/span>Ng\u0103n thao t\u00e1c t\u1ea3i l\u1ea1i li\u00ean t\u1ee5c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t ph\u01b0\u01a1ng th\u1ee9c t\u1ea5n c\u00f4ng VPS ph\u1ed5 bi\u1ebfn hi\u1ec7n nay l\u00e0 t\u1ea3i l\u1ea1i <a href=\"https:\/\/interdata.vn\/blog\/page-la-gi\/\">trang web<\/a> li\u00ean t\u1ee5c. H\u1ec7 th\u1ed1ng t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y b\u1eb1ng hai c\u00e1ch: nh\u1ea5n ph\u00edm F5 li\u00ean t\u1ee5c ho\u1eb7c s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m t\u1ef1 \u0111\u1ed9ng c\u00f3 ch\u1ee9c n\u0103ng t\u01b0\u01a1ng t\u1ef1.<\/p>\n<p>Th\u00f4ng th\u01b0\u1eddng, <strong>th\u1eddi gian t\u1ea3i l\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp s\u1eb5n<\/strong>, kh\u00f4ng c\u1ea7n can thi\u1ec7p th\u1ee7 c\u00f4ng nhi\u1ec1u l\u1ea7n. Khi g\u1eb7p t\u1ea5n c\u00f4ng n\u00e0y, trang web c\u1ee7a b\u1ea1n s\u1ebd b\u1ecb ch\u1eadm \u0111i do l\u01b0\u1ee3ng truy c\u1eadp \u1ea3o l\u1edbn, g\u00e2y \u00e1p l\u1ef1c l\u00ean b\u0103ng th\u00f4ng v\u00e0 l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a trang web.<\/p>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp t\u1eadp tin <a href=\"https:\/\/interdata.vn\/blog\/file-htaccess-la-gi\/\">.htaccess<\/a> v\u1edbi n\u1ed9i dung nh\u01b0 sau:<\/p>\n<pre>RewriteEngine on\r\n\r\nRewriteCond %{HTTP_REFERER} !^http(s)?:\/\/(<a href=\"https:\/\/interdata.vn\/blog\/world-wide-web\/\">www<\/a>.)?domain.com [NC]\r\n\r\nRewriteRule !antiddos.phtml <a href=\"https:\/\/interdata.vn\/blog\/giao-thuc-https-la-gi\/\">https<\/a>:\/\/www.domain.com\/antiddos.phtml?%{REQUEST_URI} [QSA]<\/pre>\n<p>\u0110\u1ed3ng th\u1eddi t\u1ea1o song song m\u1ed9t t\u1eadp tin v\u1edbi t\u00ean g\u1ecdi antiddos.phtml. N\u1ed9i dung ch\u00ednh g\u1ed3m:<\/p>\n<pre>&lt;?\r\n\r\n$text = $HTTP_SERVER_VARS['QUERY_STRING'];\r\n\r\n$text = preg_replace(\"#php\",'<a href=\"https:\/\/interdata.vn\/blog\/php-la-gi\/\">php<\/a>?',$text);\r\n\r\necho('\r\n\r\n;[<a href=\"https:\/\/www.domain.com\/?%27.$text.%27\" rel=\"nofollow noopener\" target=\"_blank\">CLICK HERE TO ENTER<\/a>]&lt;\/a\r\n');\r\n\r\n?&gt;<\/pre>\n<p>\u0110\u1ec3 ng\u0103n ch\u1eb7n, sau khi b\u1ea1n t\u1ea3i hai t\u1eadp tin c\u1ea7n thi\u1ebft l\u00ean trang web, m\u1ed7i l\u1ea7n truy c\u1eadp s\u1ebd y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng x\u00e1c th\u1ef1c th\u00f4ng qua m\u1ed9t c\u00fa nh\u1ea5p chu\u1ed9t. \u0110i\u1ec1u n\u00e0y gi\u00fap ng\u0103n ch\u1eb7n t\u00e1c \u0111\u1ed9ng c\u1ee7a thao t\u00e1c t\u1ea3i l\u1ea1i li\u00ean t\u1ee5c v\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 truy c\u1eadp, v\u00ec ch\u1ec9 l\u00e0 m\u1ed9t trang <a href=\"https:\/\/interdata.vn\/blog\/html-la-gi\/\">HTML<\/a> nh\u1ecf v\u00e0 d\u1ec5 t\u1ea3i.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Gioi-han-luu-luong-truy-cap\"><\/span>Gi\u1edbi h\u1ea1n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed7i khi kh\u00e1ch h\u00e0ng truy c\u1eadp v\u00e0o website c\u1ee7a b\u1ea1n, m\u1ed9t <a href=\"https:\/\/interdata.vn\/blog\/query-la-gi\/\">truy v\u1ea5n<\/a> s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn c\u01a1 s\u1edf d\u1eef li\u1ec7u (CSDL) \u0111\u1ec3 t\u00ecm ki\u1ebfm v\u00e0 hi\u1ec3n th\u1ecb th\u00f4ng tin. Tuy nhi\u00ean, s\u1ed1 l\u01b0\u1ee3ng truy v\u1ea5n k\u1ebft n\u1ed1i n\u00e0y c\u00f3 gi\u1edbi h\u1ea1n. N\u1ebfu s\u1ed1 l\u01b0\u1ee3ng truy v\u1ea5n v\u01b0\u1ee3t qu\u00e1 m\u1ee9c cho ph\u00e9p, t\u1ed1c \u0111\u1ed9 truy c\u1eadp s\u1ebd ch\u1eadm l\u1ea1i.<\/p>\n<figure id=\"attachment_20422\" aria-describedby=\"caption-attachment-20422\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-20422\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Gioi-han-luu-luong-truy-cap.jpg\" alt=\"Gi\u1edbi h\u1ea1n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp\" width=\"800\" height=\"520\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Gioi-han-luu-luong-truy-cap.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Gioi-han-luu-luong-truy-cap-300x195.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Gioi-han-luu-luong-truy-cap-768x499.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/Gioi-han-luu-luong-truy-cap-750x488.jpg 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-20422\" class=\"wp-caption-text\">Gi\u1edbi h\u1ea1n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp<\/figcaption><\/figure>\n<p>T\u1eadn d\u1ee5ng \u0111i\u1ec3m y\u1ebfu n\u00e0y, c\u00e1c hacker th\u01b0\u1eddng t\u1ea1o ra c\u00e1c k\u1ebft n\u1ed1i \u1ea3o b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng proxy ho\u1eb7c m\u1ea1ng <a href=\"https:\/\/interdata.vn\/blog\/botnet-la-gi\/\">botnet<\/a> \u0111\u1ec3 l\u00e0m qu\u00e1 t\u1ea3i v\u00e0 g\u00e2y s\u1eadp website.<\/p>\n<p>\u0110\u1ec3 h\u1ea1n ch\u1ebf t\u00ecnh tr\u1ea1ng n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 <strong>gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng truy c\u1eadp c\u00f9ng l\u00fac tr\u00ean website<\/strong>. C\u00e1ch ch\u1ed1ng DDoS n\u00e0y \u00e1p d\u1ee5ng hi\u1ec7u qu\u1ea3 cho c\u1ea3 VPS ch\u1ea1y <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh\/\">h\u1ec7 \u0111i\u1ec1u h\u00e0nh<\/a> Windows v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh-linux-la-gi\/\">Linux<\/a>. B\u1ea1n c\u00f3 th\u1ec3 th\u00eam \u0111o\u1ea1n m\u00e3 sau v\u00e0o <a href=\"https:\/\/interdata.vn\/blog\/homepage-la-gi\/\">trang ch\u1ee7<\/a> \u0111\u1ec3 b\u1ea3o v\u1ec7 website c\u1ee7a m\u00ecnh.<\/p>\n<pre>function server_busy($numer) {\r\n\r\nif (THIS_IS == 'WEBSITE' &amp;&amp; PHP_OS == 'Linux' and @file_exists ( '\/proc\/loadavg' ) and $filestuff = @file_get_contents ( '\/proc\/loadavg' )) {\r\n\r\n$loadavg = explode ( ' ', $filestuff );\r\n\r\nif (trim ( $loadavg [0] ) &gt; $numer) {\r\n\r\nprint '';\r\n\r\nprint 'L\u01b0\u1ee3ng truy c\u1eadp \u0111ang qu\u00e1 t\u1ea3i, m\u1eddi b\u1ea1n quay l\u1ea1i sau v\u00e0i ph\u00fat.';\r\n\r\nexit ( 0 );\r\n\r\n}\r\n\r\n}\r\n\r\n}\r\n\r\n$srv = server_busy ( 1000 ); \/\/ 1000 l\u00e0 s\u1ed1 ng\u01b0\u1eddi truy c\u1eadp t\u1ea1i 1 th\u1eddi \u0111i\u1ec3m<\/pre>\n<h3><span class=\"ez-toc-section\" id=\"Bat-che-do-cache\"><\/span>B\u1eadt ch\u1ebf \u0111\u1ed9 cache<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>K\u00edch ho\u1ea1t <a href=\"https:\/\/interdata.vn\/blog\/bo-nho-dem-la-gi\/\">cache<\/a> tr\u00ean server ho\u1eb7c s\u1eed d\u1ee5ng c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/plugin-la-gi\/\">plugin<\/a> cache cho website gi\u00fap gi\u1ea3m t\u1ea3i cho server v\u00e0 h\u1ea1n ch\u1ebf t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS nh\u1eafm v\u00e0o t\u00e0i nguy\u00ean \u0111\u1ed9ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Su-dung-bo-loc-goi-Packet-Filtering\"><\/span>S\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc g\u00f3i (Packet Filtering)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a c\u1ea5u h\u00ecnh h\u1ec7 th\u1ed1ng, bao g\u1ed3m c\u1ea3 h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng, s\u1ebd t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i v\u00e0 gi\u1ea3m nguy c\u01a1 b\u1ecb t\u1ea5n c\u00f4ng DDoS. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c c\u1ea3i thi\u1ec7n b\u1ea3o m\u1eadt, lo\u1ea1i b\u1ecf c\u00e1c ti\u1ebfn tr\u00ecnh kh\u00f4ng c\u1ea7n thi\u1ebft, v\u00e0 \u0111i\u1ec1u ch\u1ec9nh c\u1ea5u h\u00ecnh m\u1ea1ng \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1t nh\u1ea5t.<\/p>\n<p>B\u1ea3o v\u1ec7 VPS kh\u1ecfi t\u1ea5n c\u00f4ng DDoS l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 \u1ed5n \u0111\u1ecbnh v\u00e0 an to\u00e0n cho h\u1ec7 th\u1ed1ng. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o v\u1ec7 VPS kh\u1ecfi t\u1ea5n c\u00f4ng DDoS t\u1eeb ph\u1ea7n m\u1ec1m, t\u01b0\u1eddng l\u1eeda \u0111\u1ebfn t\u00edch h\u1ee3p Cloudflare gi\u00fap gi\u1ea3m thi\u1ec3u t\u1ed1i \u0111a r\u1ee7i ro.<\/p>\n<p>InterData.vn mang \u0111\u1ebfn c\u00e1c gi\u1ea3i ph\u00e1p m\u00e1y ch\u1ee7 ch\u1ea5t l\u01b0\u1ee3ng cao nh\u01b0:\u00a0<a href=\"https:\/\/interdata.vn\/vietnam-dedicated-server\/\">thu\u00ea Server<\/a>,\u00a0<a href=\"https:\/\/interdata.vn\/cloud-server\/\">thu\u00ea Cloud Server<\/a>,\u00a0<a href=\"https:\/\/interdata.vn\/thue-vps\/\">thu\u00ea VPS<\/a>\u00a0v\u00e0\u00a0<a href=\"https:\/\/interdata.vn\/thue-hosting\/\">thu\u00ea Hosting<\/a>. V\u1edbi h\u1ea1 t\u1ea7ng ph\u1ea7n c\u1ee9ng m\u1edbi nh\u1ea5t s\u1eed d\u1ee5ng b\u1ed9 vi x\u1eed l\u00fd\u00a0<a href=\"https:\/\/interdata.vn\/blog\/cpu-amd-epyc-la-gi\/\">AMD EPYC<\/a>\u00a0Gen3 c\u00f9ng NVMe U.2, \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t v\u01b0\u1ee3t tr\u1ed9i v\u00e0 t\u1ed1c \u0111\u1ed9 truy xu\u1ea5t d\u1eef li\u1ec7u nhanh ch\u00f3ng. Kh\u00e1ch h\u00e0ng s\u1ebd \u0111\u01b0\u1ee3c tr\u1ea3i nghi\u1ec7m d\u1ecbch v\u1ee5 \u1ed5n \u0111\u1ecbnh v\u1edbi <a href=\"https:\/\/interdata.vn\/blog\/uptime-la-gi\/\">uptime<\/a> l\u00ean \u0111\u1ebfn 99.99% v\u00e0 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt 24\/7\/365.<\/p>\n<p><strong>InterData<\/strong><\/p>\n<ul>\n<li><strong>Website:<\/strong>\u00a0Interdata.vn<\/li>\n<li><strong>Hotline 24\/24:<\/strong>\u00a01900-636822<\/li>\n<li><strong>Email:<\/strong>\u00a0Info@interdata.vn<\/li>\n<li><strong>VP\u0110D:<\/strong>\u00a0240 Nguy\u1ec5n \u0110\u00ecnh Ch\u00ednh, P.11. Q. Ph\u00fa Nhu\u1eadn, TP. Ho\u0302\u0300 Ch\u00ed Minh<\/li>\n<li><strong>VPGD:<\/strong>\u00a0S\u1ed1 211 \u0110\u01b0\u1eddng s\u1ed1 5, K\u0110T Lakeview City, P. An Ph\u00fa, TP. Th\u1ee7 \u0110\u1ee9c, TP. H\u1ed3 Ch\u00ed Minh<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>DDoS l\u00e0 m\u1ed9t trong nh\u1eefng m\u1ed1i \u0111e d\u1ecda h\u00e0ng \u0111\u1ea7u \u0111\u1ed1i v\u1edbi c\u00e1c m\u00e1y ch\u1ee7 VPS. C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS c\u00f3 th\u1ec3 khi\u1ebfn h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n qu\u00e1 t\u1ea3i, l\u00e0m gi\u00e1n \u0111o\u1ea1n ho\u1ea1t \u0111\u1ed9ng v\u00e0 g\u00e2y t\u1ed5n th\u1ea5t l\u1edbn. V\u1eady l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 nh\u1eadn bi\u1ebft VPS \u0111ang b\u1ecb t\u1ea5n c\u00f4ng DDoS v\u00e0 c\u00e1c<\/p>\n","protected":false},"author":11,"featured_media":20423,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-20412","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vps"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/20412","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=20412"}],"version-history":[{"count":1,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/20412\/revisions"}],"predecessor-version":[{"id":38550,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/20412\/revisions\/38550"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/20423"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=20412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=20412"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=20412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}