{"id":18537,"date":"2021-01-24T16:42:24","date_gmt":"2021-01-24T09:42:24","guid":{"rendered":"https:\/\/speed.family\/?p=18537"},"modified":"2021-01-24T16:42:24","modified_gmt":"2021-01-24T09:42:24","slug":"cach-giam-ddos","status":"publish","type":"post","link":"https:\/\/kiencang.net\/cach-giam-ddos\/","title":{"rendered":"C\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u00fap gi\u1ea3m thi\u1ec3u t\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec?"},"content":{"rendered":"\n<p>Xem ph\u1ea7n 1: <a href=\"https:\/\/kiencang.net\/ddos-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">T\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec<\/a> &amp; ph\u1ea7n 2: <a href=\"https:\/\/kiencang.net\/kieu-tan-cong-ddos\/\" target=\"_blank\" rel=\"noreferrer noopener\">C\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng DDoS<\/a>.<\/p>\n\n\n<p>\u0110i\u1ec3m tr\u1ecdng t\u00e2m trong vi\u1ec7c gi\u1ea3m thi\u1ec3u m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111\u00f3 l\u00e0 <strong>ph\u00e2n bi\u1ec7t gi\u1eefa l\u01b0u l\u01b0\u1ee3ng t\u1ea5n c\u00f4ng (attack traffic) v\u00e0 l\u01b0u l\u01b0\u1ee3ng th\u00f4ng th\u01b0\u1eddng (normal traffic)<\/strong>.<\/p>\n\n\n<p>V\u00ed d\u1ee5: n\u1ebfu trang web d\u00e0nh cho b\u1ea3n ph\u00e1t h\u00e0nh s\u1ea3n ph\u1ea9m m\u1edbi c\u1ee7a c\u00f4ng ty nh\u1eadn \u0111\u01b0\u1ee3c l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn t\u1eeb nh\u1eefng kh\u00e1ch h\u00e0ng \u0111ang h\u00e1o h\u1ee9c, th\u00ec vi\u1ec7c c\u1eaft h\u1ebft l\u01b0u l\u01b0\u1ee3ng l\u00e0 m\u1ed9t sai l\u1ea7m nghi\u00eam tr\u1ecdng.&nbsp;Tuy nhi\u00ean n\u1ebfu c\u00f4ng ty \u0111\u00f3 \u0111\u1ed9t nhi\u00ean c\u00f3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp t\u0103ng v\u1ecdt t\u1eeb nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng \u0111\u00e3 x\u00e1c \u0111\u1ecbnh, nh\u1eefng n\u1ed7 l\u1ef1c \u0111\u1ec3 gi\u1ea3m b\u1edbt cu\u1ed9c t\u1ea5n c\u00f4ng \u0111\u00f3 c\u00f3 l\u1ebd l\u00e0 c\u1ea7n thi\u1ebft.<\/p>\n\n\n<p>Kh\u00f3 kh\u0103n n\u1eb1m \u1edf vi\u1ec7c ph\u00e2n bi\u1ec7t kh\u00e1ch h\u00e0ng th\u1ef1c trong t\u1ed5ng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp v\u00e0o website.<\/p>\n\n\n<p>Trong th\u1ebf gi\u1edbi Internet hi\u1ec7n \u0111\u1ea1i, l\u01b0u l\u01b0\u1ee3ng DDoS c\u00f3 nhi\u1ec1u d\u1ea1ng th\u1ee9c.&nbsp;L\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u00f3 th\u1ec3 kh\u00e1c nhau v\u1ec1 thi\u1ebft k\u1ebf t\u1eeb c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ngu\u1ed3n \u0111\u01a1n kh\u00f4ng gi\u1ea3 m\u1ea1o \u0111\u1ebfn c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng \u0111a vect\u01a1 ph\u1ee9c t\u1ea1p v\u00e0 th\u00edch \u1ee9ng.<\/p>\n\n\n<p>M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111a vect\u01a1 s\u1eed d\u1ee5ng nhi\u1ec1u con \u0111\u01b0\u1eddng t\u1ea5n c\u00f4ng \u0111\u1ec3 \u00e1p \u0111\u1ea3o (g\u00e2y qu\u00e1 t\u1ea3i) m\u1ee5c ti\u00eau theo nh\u1eefng c\u00e1ch kh\u00e1c nhau, c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m m\u1ea5t t\u1eadp trung c\u00e1c n\u1ed7 l\u1ef1c gi\u1ea3m thi\u1ec3u,c h\u1ed1ng tr\u1ea3 tr\u00ean b\u1ea5t k\u1ef3 qu\u1ef9 \u0111\u1ea1o n\u00e0o.<\/p>\n\n\n<p>M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o nhi\u1ec1u l\u1edbp c\u1ee7a ng\u0103n x\u1ebfp giao th\u1ee9c c\u00f9ng m\u1ed9t l\u00fac, ch\u1eb3ng h\u1ea1n nh\u01b0 khu\u1ebfch \u0111\u1ea1i DNS (nh\u1eafm m\u1ee5c ti\u00eau l\u1edbp 3\/4) c\u00f9ng v\u1edbi m\u1ed9t&nbsp;cu\u1ed9c t\u1ed5ng t\u1ea5n c\u00f4ng HTTP&nbsp;(nh\u1eafm m\u1ee5c ti\u00eau l\u1edbp 7) l\u00e0 m\u1ed9t v\u00ed d\u1ee5 v\u1ec1 t\u1ea5n c\u00f4ng DDoS \u0111a vect\u01a1.<\/p>\n\n\n<p>Gi\u1ea3m thi\u1ec3u m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111a vect\u01a1 \u0111\u00f2i h\u1ecfi nhi\u1ec1u chi\u1ebfn l\u01b0\u1ee3c kh\u00e1c nhau \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c qu\u1ef9 \u0111\u1ea1o kh\u00e1c nhau.<\/p>\n\n\n<p>N\u00f3i chung, cu\u1ed9c t\u1ea5n c\u00f4ng c\u00e0ng ph\u1ee9c t\u1ea1p th\u00ec c\u00e0ng c\u00f3 nhi\u1ec1u kh\u1ea3 n\u0103ng l\u00e0 l\u01b0u l\u01b0\u1ee3ng t\u1ea5n c\u00f4ng s\u1ebd kh\u00f3 t\u00e1ch kh\u1ecfi l\u01b0u l\u01b0\u1ee3ng th\u00f4ng th\u01b0\u1eddng &#8211; m\u1ee5c ti\u00eau c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng l\u00e0 h\u00f2a nh\u1eadp c\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t, khi\u1ebfn c\u00e1c n\u1ed7 l\u1ef1c gi\u1ea3m thi\u1ec3u c\u00e0ng k\u00e9m hi\u1ec7u qu\u1ea3 c\u00e0ng t\u1ed1t.<\/p>\n\n\n<p>C\u00e1c n\u1ed7 l\u1ef1c gi\u1ea3m thi\u1ec3u li\u00ean quan \u0111\u1ebfn vi\u1ec7c gi\u1ea3m ho\u1eb7c h\u1ea1n ch\u1ebf l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp m\u1ed9t c\u00e1ch b\u1eeba b\u00e3i, kh\u00f4ng t\u00ednh to\u00e1n c\u00f3 th\u1ec3 g\u00e2y ra h\u1eadu qu\u1ea3 tai h\u1ea1i l\u00e0: lo\u1ea1i b\u1ecf l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp t\u1ed1t v\u1edbi l\u01b0u l\u01b0\u1ee3ng x\u1ea5u, v\u00e0 cu\u1ed9c t\u1ea5n c\u00f4ng c\u0169ng c\u00f3 th\u1ec3 s\u1eeda \u0111\u1ed5i v\u00e0 th\u00edch \u1ee9ng v\u1edbi c\u00e1c bi\u1ec7n ph\u00e1p \u0111\u1ed1i ph\u00f3.&nbsp;\u0110\u1ec3 v\u01b0\u1ee3t qua m\u1ed9t n\u1ed7 l\u1ef1c ph\u1ee9c t\u1ea1p v\u1ec1 s\u1ef1 gi\u00e1n \u0111o\u1ea1n, m\u1ed9t gi\u1ea3i ph\u00e1p ph\u00e2n l\u1edbp s\u1ebd mang l\u1ea1i l\u1ee3i \u00edch l\u1edbn nh\u1ea5t.<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_60 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >M\u1ee5c l\u1ee5c<\/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\" role=\"button\"><label for=\"item-6577d66a8435c\" ><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><\/label><input aria-label=\"Toggle\" aria-label=\"item-6577d66a8435c\"  type=\"checkbox\" id=\"item-6577d66a8435c\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kiencang.net\/cach-giam-ddos\/#Dinh_tuyen_lo_den\" title=\"\u0110\u1ecbnh tuy\u1ebfn l\u1ed7 \u0111en\">\u0110\u1ecbnh tuy\u1ebfn l\u1ed7 \u0111en<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kiencang.net\/cach-giam-ddos\/#Gioi_han_ty_le\" title=\"Gi\u1edbi h\u1ea1n t\u1ef7 l\u1ec7\">Gi\u1edbi h\u1ea1n t\u1ef7 l\u1ec7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kiencang.net\/cach-giam-ddos\/#Tuong_lua_ung_dung_web\" title=\"T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web\">T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kiencang.net\/cach-giam-ddos\/#Khuech_tan_qua_mang_Anycast\" title=\"Khu\u1ebfch t\u00e1n qua m\u1ea1ng Anycast\">Khu\u1ebfch t\u00e1n qua m\u1ea1ng Anycast<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dinh_tuyen_lo_den\"><\/span>\u0110\u1ecbnh tuy\u1ebfn l\u1ed7 \u0111en<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>M\u1ed9t gi\u1ea3i ph\u00e1p c\u00f3 s\u1eb5n cho h\u1ea7u nh\u01b0 t\u1ea5t c\u1ea3 c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng l\u00e0 t\u1ea1o m\u1ed9t&nbsp;tuy\u1ebfn l\u1ed7 \u0111en (blackhole route)&nbsp;v\u00e0 chuy\u1ec3n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp v\u00e0o tuy\u1ebfn \u0111\u00f3.&nbsp;\u1ede d\u1ea1ng \u0111\u01a1n gi\u1ea3n nh\u1ea5t, khi l\u1ecdc l\u1ed7 \u0111en \u0111\u01b0\u1ee3c tri\u1ec3n khai m\u00e0 kh\u00f4ng c\u00f3 ti\u00eau ch\u00ed h\u1ea1n ch\u1ebf c\u1ee5 th\u1ec3, c\u1ea3 l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng h\u1ee3p ph\u00e1p v\u00e0 \u0111\u1ed9c h\u1ea1i \u0111\u1ec1u \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ebfn m\u1ed9t tuy\u1ebfn r\u1ed7ng, ho\u1eb7c l\u1ed7 \u0111en v\u00e0 b\u1ecb lo\u1ea1i b\u1ecf kh\u1ecfi m\u1ea1ng.<\/p>\n\n\n<p>N\u1ebfu m\u1ed9t th\u00e0nh ph\u1ea7n tr\u00ean Internet \u0111ang g\u1eb7p ph\u1ea3i cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP) c\u1ee7a t\u00e0i s\u1ea3n \u0111\u00f3 c\u00f3 th\u1ec3 g\u1eedi t\u1ea5t c\u1ea3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u1ee7a trang web v\u00e0o m\u1ed9t l\u1ed7 \u0111en \u0111\u1ec3 b\u1ea3o v\u1ec7.&nbsp;\u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p l\u00fd t\u01b0\u1edfng nh\u1ea5t, v\u00ec n\u00f3 mang l\u1ea1i hi\u1ec7u qu\u1ea3 cho m\u1ee5c ti\u00eau mong mu\u1ed1n c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng: n\u00f3 l\u00e0m cho m\u1ea1ng kh\u00f4ng th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c.<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Gioi_han_ty_le\"><\/span>Gi\u1edbi h\u1ea1n t\u1ef7 l\u1ec7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>Gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u m\u00e0 m\u00e1y ch\u1ee7 s\u1ebd ch\u1ea5p nh\u1eadn trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh c\u0169ng l\u00e0 m\u1ed9t c\u00e1ch \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5.<\/p>\n\n\n<p>M\u1eb7c d\u00f9 gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 r\u1ea5t h\u1eefu \u00edch trong vi\u1ec7c l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh tr\u00ecnh duy\u1ec7t web \u0103n c\u1eafp n\u1ed9i dung v\u00e0 gi\u1ea3m thi\u1ec3u c\u00e1c&nbsp;n\u1ed7 l\u1ef1c \u0111\u0103ng nh\u1eadp&nbsp;ki\u1ec3u brute force, nh\u01b0ng ch\u1ec9 ri\u00eang n\u00f3 th\u00f4i c\u00f3 th\u1ec3 s\u1ebd kh\u00f4ng \u0111\u1ee7 to\u00e0n di\u1ec7n \u0111\u1ec3 x\u1eed l\u00fd m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS ph\u1ee9c t\u1ea1p m\u1ed9t c\u00e1ch c\u00f3 hi\u1ec7u qu\u1ea3.<\/p>\n\n\n<p>Tuy nhi\u00ean, \u0111\u1eb7t ra c\u00e1c gi\u1edbi h\u1ea1n l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n th\u1ef1c s\u1ef1 h\u1eefu \u00edch trong chi\u1ebfn l\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u DDoS hi\u1ec7u qu\u1ea3.&nbsp;T\u00ecm hi\u1ec3u v\u1ec1&nbsp;gi\u1edbi h\u1ea1n t\u1ef7 l\u1ec7 c\u1ee7a Cloudflare (c\u00f3 th\u1ec3 t\u00f4i s\u1ebd d\u1ecbch sau).<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tuong_lua_ung_dung_web\"><\/span>T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>M\u1ed9t\u00a0<a href=\"https:\/\/kiencang.net\/firewall-hay-tuong-lua\/\" target=\"_blank\" rel=\"noreferrer noopener\">Web Application Firewall (WAF \/ T\u01b0\u1eddng l\u1eeda d\u00e0nh cho \u1ee9ng d\u1ee5ng web)<\/a>\u00a0l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 kh\u1ea3 n\u0103ng gi\u1ea3m thi\u1ec3u t\u1ea5n c\u00f4ng DDoS v\u00e0o l\u1edbp 7.\u00a0B\u1eb1ng c\u00e1ch \u0111\u1eb7t WAF n\u1eb1m gi\u1eefa Internet v\u00e0 m\u00e1y ch\u1ee7 g\u1ed1c, WAF c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t\u00a0<a href=\"https:\/\/kiencang.net\/proxy-nguoc-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">proxy ng\u01b0\u1ee3c<\/a>, b\u1ea3o v\u1ec7 m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c nh\u1eafm m\u1ee5c ti\u00eau kh\u1ecfi m\u1ed9t s\u1ed1 lo\u1ea1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ed9c h\u1ea1i (malicious traffic).<\/p>\n\n\n<p>B\u1eb1ng c\u00e1ch l\u1ecdc c\u00e1c y\u00eau c\u1ea7u (filtering requests) d\u1ef1a tr\u00ean m\u1ed9t lo\u1ea1t c\u00e1c quy t\u1eafc \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c c\u00f4ng c\u1ee5 DDoS, c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng l\u1edbp 7 c\u00f3 th\u1ec3 b\u1ecb c\u1ea3n tr\u1edf.&nbsp;M\u1ed9t gi\u00e1 tr\u1ecb quan tr\u1ecdng c\u1ee7a WAF \u0111\u01b0\u1ee3c coi l\u00e0 hi\u1ec7u qu\u1ea3 \u0111\u00f3 l\u00e0 kh\u1ea3 n\u0103ng nhanh ch\u00f3ng tri\u1ec3n khai c\u00e1c quy t\u1eafc t\u00f9y ch\u1ec9nh \u0111\u1ec3 \u0111\u00e1p \u1ee9ng v\u1edbi m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng.&nbsp;T\u00ecm hi\u1ec3u v\u1ec1&nbsp;WAF c\u1ee7a Cloudflare (c\u00f3 th\u1ec3 t\u00f4i s\u1ebd d\u1ecbch sau).<\/p>\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Khuech_tan_qua_mang_Anycast\"><\/span>Khu\u1ebfch t\u00e1n qua m\u1ea1ng Anycast<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<p>C\u00e1ch ti\u1ebfp c\u1eadn gi\u1ea3m thi\u1ec3u n\u00e0y s\u1eed d\u1ee5ng <a href=\"https:\/\/kiencang.net\/anycast-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">m\u1ea1ng Anycast<\/a> \u0111\u1ec3 ph\u00e2n t\u00e1n l\u01b0u l\u01b0\u1ee3ng t\u1ea5n c\u00f4ng qua h\u1ec7 th\u1ed1ng c\u00e1c m\u00e1y ch\u1ee7 ph\u00e2n t\u00e1n t\u1edbi \u0111i\u1ec3m m\u00e0 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u01b0\u1ee3c h\u1ec7 th\u1ed1ng m\u1ea1ng h\u1ea5p th\u1ee5.<\/p>\n\n\n<p>Gi\u1ed1ng nh\u01b0 vi\u1ec7c chuy\u1ec3n m\u1ed9t d\u00f2ng s\u00f4ng ch\u1ea3y xi\u1ebft xu\u1ed1ng c\u00e1c k\u00eanh nh\u1ecf h\u01a1n ri\u00eang bi\u1ec7t, c\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y chia nh\u1ecf t\u00e1c \u0111\u1ed9ng c\u1ee7a l\u01b0u l\u01b0\u1ee3ng t\u1ea5n c\u00f4ng ph\u00e2n t\u00e1n \u0111\u1ebfn m\u1ee9c c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd \u0111\u01b0\u1ee3c, khu\u1ebfch t\u00e1n m\u1ecdi kh\u1ea3 n\u0103ng g\u00e2y r\u1ed1i.<\/p>\n\n\n<p>\u0110\u1ed9 tin c\u1eady c\u1ee7a&nbsp;m\u1ea1ng Anycast&nbsp;\u0111\u1ec3 gi\u1ea3m thi\u1ec3u cu\u1ed9c t\u1ea5n c\u00f4ng DDoS ph\u1ee5 thu\u1ed9c v\u00e0o quy m\u00f4 c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng c\u0169ng nh\u01b0 quy m\u00f4 v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a m\u1ea1ng ch\u1ed1ng l\u1ea1i n\u00f3.&nbsp;M\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng c\u1ee7a vi\u1ec7c gi\u1ea3m thi\u1ec3u DDoS do Cloudflare tri\u1ec3n khai l\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng m\u1ea1ng ph\u00e2n t\u00e1n Anycast.<\/p>\n\n\n<p>Cloudflare c\u00f3 m\u1ea1ng \u0111\u1ea1t \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 51 Tbps, \u0111\u00e2y l\u00e0 m\u1ee9c \u0111\u1ed9 l\u1edbn h\u01a1n cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u1edbn nh\u1ea5t \u0111\u01b0\u1ee3c ghi nh\u1eadn.<\/p>\n\n\n<p>N\u1ebfu b\u1ea1n hi\u1ec7n \u0111ang b\u1ecb t\u1ea5n c\u00f4ng, c\u00f3 nh\u1eefng b\u01b0\u1edbc b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u1ec3 tho\u00e1t kh\u1ecfi n\u00f3.&nbsp;N\u1ebfu b\u1ea1n \u0111\u00e3 s\u1eed d\u1ee5ng Cloudflare, b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m theo&nbsp;c\u00e1c b\u01b0\u1edbc sau&nbsp;\u0111\u1ec3 gi\u1ea3m thi\u1ec3u cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a m\u00ecnh.<\/p>\n\n\n<p>B\u1ea3o v\u1ec7 DDoS m\u00e0 ch\u00fang t\u00f4i tri\u1ec3n khai t\u1ea1i Cloudflare l\u00e0 \u0111a ph\u01b0\u01a1ng di\u1ec7n nh\u1eb1m gi\u1ea3m thi\u1ec3u nhi\u1ec1u vect\u01a1 t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 x\u1ea3y ra.&nbsp;B\u1ea1n c\u00f3 th\u1ec3 ch\u1ee7 \u0111\u1ed9ng t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 t\u00ednh n\u0103ng&nbsp;b\u1ea3o v\u1ec7 DDoS&nbsp;c\u1ee7a Cloudflare&nbsp;v\u00e0 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Xem ph\u1ea7n 1: T\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec &amp; ph\u1ea7n 2: C\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng DDoS. \u0110i\u1ec3m tr\u1ecdng t\u00e2m trong vi\u1ec7c gi\u1ea3m thi\u1ec3u m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111\u00f3 l\u00e0 ph\u00e2n bi\u1ec7t gi\u1eefa l\u01b0u l\u01b0\u1ee3ng t\u1ea5n c\u00f4ng (attack traffic) v\u00e0 l\u01b0u l\u01b0\u1ee3ng th\u00f4ng th\u01b0\u1eddng (normal traffic). V\u00ed d\u1ee5: n\u1ebfu trang web d\u00e0nh cho b\u1ea3n ph\u00e1t &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[246,252],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u00fap gi\u1ea3m thi\u1ec3u t\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec? &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/cach-giam-ddos\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u00fap gi\u1ea3m thi\u1ec3u t\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec? &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"Xem ph\u1ea7n 1: T\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec &amp; ph\u1ea7n 2: C\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng DDoS. \u0110i\u1ec3m tr\u1ecdng t\u00e2m trong vi\u1ec7c gi\u1ea3m thi\u1ec3u m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111\u00f3 l\u00e0 ph\u00e2n bi\u1ec7t gi\u1eefa l\u01b0u l\u01b0\u1ee3ng t\u1ea5n c\u00f4ng (attack traffic) v\u00e0 l\u01b0u l\u01b0\u1ee3ng th\u00f4ng th\u01b0\u1eddng (normal traffic). V\u00ed d\u1ee5: n\u1ebfu trang web d\u00e0nh cho b\u1ea3n ph\u00e1t &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kiencang.net\/cach-giam-ddos\/\" \/>\n<meta property=\"og:site_name\" content=\"Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/anhducnguyen87\/\" \/>\n<meta property=\"article:published_time\" content=\"2021-01-24T09:42:24+00:00\" \/>\n<meta name=\"author\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 ph\u00fat\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"C\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u00fap gi\u1ea3m thi\u1ec3u t\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec? &#8226; Ki\u1ebfn c\u00e0ng","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/kiencang.net\/cach-giam-ddos\/","og_locale":"vi_VN","og_type":"article","og_title":"C\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u00fap gi\u1ea3m thi\u1ec3u t\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec? &#8226; Ki\u1ebfn c\u00e0ng","og_description":"Xem ph\u1ea7n 1: T\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec &amp; ph\u1ea7n 2: C\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng DDoS. \u0110i\u1ec3m tr\u1ecdng t\u00e2m trong vi\u1ec7c gi\u1ea3m thi\u1ec3u m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111\u00f3 l\u00e0 ph\u00e2n bi\u1ec7t gi\u1eefa l\u01b0u l\u01b0\u1ee3ng t\u1ea5n c\u00f4ng (attack traffic) v\u00e0 l\u01b0u l\u01b0\u1ee3ng th\u00f4ng th\u01b0\u1eddng (normal traffic). 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T\u00f4i th\u00edch Content, SEO, Ads, T\u0103ng t\u1ed1c website v\u00e0 Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed. B\u00ean c\u1ea1nh b\u00e0i t\u1ef1 vi\u1ebft, t\u00f4i c\u0169ng d\u1ecbch nhi\u1ec1u n\u1ed9i dung th\u00fa v\u1ecb c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 kh\u00e1c nhau. FB c\u00e1 nh\u00e2n: facebook.com\/anhducnguyen87. Email li\u00ean h\u1ec7: guiemailchotoi@gmail.com","sameAs":["https:\/\/www.facebook.com\/anhducnguyen87\/"],"url":"https:\/\/kiencang.net\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/18537"}],"collection":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/comments?post=18537"}],"version-history":[{"count":0,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/posts\/18537\/revisions"}],"wp:attachment":[{"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/media?parent=18537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/categories?post=18537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kiencang.net\/wp-json\/wp\/v2\/tags?post=18537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}