{"id":19981,"date":"2024-10-22T15:05:31","date_gmt":"2024-10-22T08:05:31","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=19981"},"modified":"2024-10-22T15:05:31","modified_gmt":"2024-10-22T08:05:31","slug":"csf-firewall-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/csf-firewall-la-gi\/","title":{"rendered":"CSF Firewall l\u00e0 g\u00ec? H\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t, c\u1ea5u h\u00ecnh &#038; ch\u1eb7n IP"},"content":{"rendered":"<p>CSF Firewall l\u00e0 m\u1ed9t ph\u1ea7n m\u1ec1m <a href=\"https:\/\/interdata.vn\/blog\/tuong-lua-firewall\/\">t\u01b0\u1eddng l\u1eeda<\/a> <a href=\"https:\/\/interdata.vn\/blog\/open-source-la-gi\/\">m\u00e3 ngu\u1ed3n m\u1edf<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh ri\u00eang cho <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh-linux-la-gi\/\">h\u1ec7 \u0111i\u1ec1u h\u00e0nh Linux<\/a>, gi\u00fap b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda m\u1ea1ng. CSF h\u1ed7 tr\u1ee3 qu\u1ea3n l\u00fd quy\u1ec1n truy c\u1eadp hi\u1ec7u qu\u1ea3 th\u00f4ng qua danh s\u00e1ch <strong>whitelist<\/strong> v\u00e0 <strong>blacklist<\/strong>. \u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 <strong>CSF Firewall<\/strong>, vai tr\u00f2, \u0111\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt v\u00e0 c\u00e1ch c\u00e0i \u0111\u1eb7t, h\u00e3y c\u00f9ng InterData kh\u00e1m ph\u00e1 chi ti\u1ebft trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<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\/csf-firewall-la-gi\/#CSF-Firewall-la-gi\" >CSF Firewall 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\/csf-firewall-la-gi\/#CSF-Firewall-hoat-dong-nhu-the-nao\" >CSF Firewall ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/csf-firewall-la-gi\/#Huong-dan-cai-dat-CSF-Firewall\" >H\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t CSF Firewall<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/csf-firewall-la-gi\/#Huong-dan-cau-hinh-CSF-Firewall\" >H\u01b0\u1edbng d\u1eabn c\u1ea5u h\u00ecnh CSF Firewall<\/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\/csf-firewall-la-gi\/#Huong-dan-chan-va-cho-phep-dia-chi-IP-trong-CSF-Firewall\" >H\u01b0\u1edbng d\u1eabn ch\u1eb7n v\u00e0 cho ph\u00e9p \u0111\u1ecba ch\u1ec9 IP trong CSF Firewall<\/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\/csf-firewall-la-gi\/#Huong-dan-chan-dia-chi-IP\" >H\u01b0\u1edbng d\u1eabn ch\u1eb7n \u0111\u1ecba ch\u1ec9 IP<\/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\/csf-firewall-la-gi\/#2-Chan-IP-tu-WHM-neu-ban-dang-su-dung-cPanel\" >2. Ch\u1eb7n IP t\u1eeb WHM (n\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng cPanel)<\/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\/csf-firewall-la-gi\/#3-Chan-mot-dai-dia-chi-IP\" >3. Ch\u1eb7n m\u1ed9t d\u1ea3i \u0111\u1ecba ch\u1ec9 IP<\/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\/csf-firewall-la-gi\/#Huong-dan-cho-phep-dia-chi-IP\" >H\u01b0\u1edbng d\u1eabn cho ph\u00e9p \u0111\u1ecba ch\u1ec9 IP<\/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\/csf-firewall-la-gi\/#Cach-cho-phep-mot-dai-dia-chi-IP\" >C\u00e1ch cho ph\u00e9p m\u1ed9t d\u1ea3i \u0111\u1ecba ch\u1ec9 IP<\/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\/csf-firewall-la-gi\/#Luu-y-quan-trong\" >L\u01b0u \u00fd quan tr\u1ecdng<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"CSF-Firewall-la-gi\"><\/span>CSF Firewall l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>CSF Firewall<\/strong> l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p t\u01b0\u1eddng l\u1eeda <a href=\"https:\/\/interdata.vn\/blog\/source-code-la-gi\/\">m\u00e3 ngu\u1ed3n<\/a> m\u1edf m\u1ea1nh m\u1ebd, \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n d\u00e0nh ri\u00eang cho c\u00e1c <strong><a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh\/\">h\u1ec7 \u0111i\u1ec1u h\u00e0nh<\/a> Linux<\/strong>. V\u1edbi m\u1ee5c ti\u00eau ch\u00ednh l\u00e0 b\u1ea3o v\u1ec7 c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a> v\u00e0 h\u1ec7 th\u1ed1ng m\u1ea1ng Linux tr\u01b0\u1edbc c\u00e1c m\u1ed1i \u0111e d\u1ecda an ninh m\u1ea1ng t\u1eeb b\u00ean ngo\u00e0i, CSF Firewall gi\u00fap ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng, \u0111\u1ed3ng th\u1eddi gi\u1ea3m thi\u1ec3u r\u1ee7i ro truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0o c\u00e1c d\u1ecbch v\u1ee5 nh\u1ea1y c\u1ea3m.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/csf-firewall-la-gi.webp\" alt=\"CSF Firewall l\u00e0 g\u00ec\" width=\"800\" height=\"416\" class=\"aligncenter size-full wp-image-20062\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/csf-firewall-la-gi.webp 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/csf-firewall-la-gi-300x156.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/csf-firewall-la-gi-768x399.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/csf-firewall-la-gi-750x390.webp 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>H\u1ec7 th\u1ed1ng n\u00e0y cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1eb7n IP kh\u00f4ng mong mu\u1ed1n, ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd quy\u1ec1n truy c\u1eadp, v\u00e0 theo d\u00f5i l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n b\u1ea5t k\u1ef3 h\u00e0nh vi \u0111\u00e1ng ng\u1edd n\u00e0o. Nh\u1edd v\u00e0o nh\u1eefng t\u00ednh n\u0103ng v\u01b0\u1ee3t tr\u1ed9i v\u00e0 s\u1ef1 d\u1ec5 d\u00e0ng trong vi\u1ec7c c\u1ea5u h\u00ecnh, CSF Firewall \u0111\u00e3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng, kh\u1eb3ng \u0111\u1ecbnh v\u1ecb th\u1ebf l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 b\u1ea3o m\u1eadt \u0111\u00e1ng tin c\u1eady v\u00e0 ph\u1ed5 bi\u1ebfn trong l\u0129nh v\u1ef1c an ninh m\u1ea1ng hi\u1ec7n nay.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CSF-Firewall-hoat-dong-nhu-the-nao\"><\/span>CSF Firewall ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>CSF Firewall ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t t\u01b0\u1eddng l\u1eeda gi\u00fap ki\u1ec3m so\u00e1t v\u00e0 qu\u1ea3n l\u00fd l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng \u0111i qua c\u00e1c m\u00e1y ch\u1ee7 Linux. Khi \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t v\u00e0 k\u00edch ho\u1ea1t, CSF Firewall s\u1ebd d\u1ef1a v\u00e0o c\u00e1c t\u1ec7p c\u1ea5u h\u00ecnh \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 th\u1ef1c thi c\u00e1c quy t\u1eafc b\u1ea3o m\u1eadt c\u1ee5 th\u1ec3, t\u1eeb \u0111\u00f3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 tr\u01b0\u1edbc nh\u1eefng m\u1ed1i \u0111e d\u1ecda m\u1ea1ng. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p qu\u1ea3n tr\u1ecb vi\u00ean d\u1ec5 d\u00e0ng t\u00f9y ch\u1ec9nh c\u00e1c quy t\u1eafc \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u b\u1ea3o m\u1eadt ri\u00eang c\u1ee7a t\u1eebng h\u1ec7 th\u1ed1ng.<\/p>\n<p>CSF Firewall cung c\u1ea5p kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t truy c\u1eadp v\u00e0o c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng quan tr\u1ecdng nh\u01b0 SSH, HTTP, <a href=\"https:\/\/interdata.vn\/blog\/ftp-la-gi\/\">FTP<\/a>, <a href=\"https:\/\/interdata.vn\/blog\/smtp-la-gi\/\">SMTP<\/a> v\u00e0 nhi\u1ec1u d\u1ecbch v\u1ee5 kh\u00e1c. B\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp c\u00e1c quy t\u1eafc \u0111\u1ec3 ch\u1eb7n y\u00eau c\u1ea7u t\u1eeb c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a> c\u1ee5 th\u1ec3 ho\u1eb7c nh\u1eefng \u0111\u1ecba ch\u1ec9 IP \u0111\u00e3 n\u1eb1m trong danh s\u00e1ch \u0111en, gi\u00fap ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0 t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt h\u1ec7 th\u1ed1ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-hoat-dong-cua-csf-firewall.webp\" alt=\"CSF Firewall ho\u1ea1t \u0111\u1ed9ng\" width=\"800\" height=\"461\" class=\"aligncenter size-full wp-image-20060\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-hoat-dong-cua-csf-firewall.webp 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-hoat-dong-cua-csf-firewall-300x173.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-hoat-dong-cua-csf-firewall-768x443.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cach-hoat-dong-cua-csf-firewall-750x432.webp 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Khi m\u1ed9t y\u00eau c\u1ea7u truy c\u1eadp \u0111\u1ebfn m\u00e1y ch\u1ee7, CSF Firewall s\u1ebd ki\u1ec3m tra y\u00eau c\u1ea7u n\u00e0y d\u1ef1a tr\u00ean c\u00e1c quy t\u1eafc \u0111\u00e3 thi\u1ebft l\u1eadp. N\u1ebfu y\u00eau c\u1ea7u tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc, n\u00f3 s\u1ebd \u0111\u01b0\u1ee3c ph\u00e9p \u0111i qua v\u00e0 \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1edfi c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng. Ng\u01b0\u1ee3c l\u1ea1i, nh\u1eefng y\u00eau c\u1ea7u kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111i\u1ec1u ki\u1ec7n b\u1ea3o m\u1eadt s\u1ebd b\u1ecb ch\u1eb7n ngay l\u1eadp t\u1ee9c, \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng kh\u00f4ng b\u1ecb x\u00e2m nh\u1eadp.<\/p>\n<p>Ngo\u00e0i ra, CSF Firewall c\u00f3 th\u1ec3 c\u1ea5u h\u00ecnh \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng c\u1ea3nh b\u00e1o ho\u1eb7c ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng ph\u1ed5 bi\u1ebfn nh\u01b0 t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 (<a href=\"https:\/\/interdata.vn\/blog\/dos-attack-la-gi\/\">DoS<\/a>), qu\u00e9t c\u1ed5ng ho\u1eb7c c\u00e1c h\u00e0nh vi ph\u00e1 ho\u1ea1i kh\u00e1c. C\u00f4ng c\u1ee5 n\u00e0y c\u00f2n h\u1ed7 tr\u1ee3 theo d\u00f5i v\u00e0 b\u00e1o c\u00e1o l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng, cung c\u1ea5p cho qu\u1ea3n tr\u1ecb vi\u00ean m\u1ed9t c\u00e1i nh\u00ecn t\u1ed5ng quan v\u1ec1 t\u00ecnh tr\u1ea1ng an ninh c\u1ee7a h\u1ec7 th\u1ed1ng, t\u1eeb \u0111\u00f3 gi\u00fap \u0111\u01b0a ra c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Huong-dan-cai-dat-CSF-Firewall\"><\/span>H\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t CSF Firewall<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 c\u00e0i \u0111\u1eb7t CSF Firewall tr\u00ean m\u00e1y ch\u1ee7 Linux m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng v\u00e0 hi\u1ec7u qu\u1ea3, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<p><strong>B\u01b0\u1edbc 1: Ki\u1ec3m tra phi\u00ean b\u1ea3n h\u1ec7 \u0111i\u1ec1u h\u00e0nh Linux<\/strong> Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u, h\u00e3y ki\u1ec3m tra phi\u00ean b\u1ea3n h\u1ec7 \u0111i\u1ec1u h\u00e0nh Linux c\u1ee7a b\u1ea1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n \u0111ang t\u1ea3i \u0111\u00fang phi\u00ean b\u1ea3n CSF Firewall ph\u00f9 h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng. Vi\u1ec7c n\u00e0y gi\u00fap \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh c\u1ee7a CSF Firewall.<\/p>\n<p><strong>B\u01b0\u1edbc 2: T\u1ea3i CSF Firewall<\/strong> Sau khi x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c phi\u00ean b\u1ea3n h\u1ec7 \u0111i\u1ec1u h\u00e0nh, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea3i phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t c\u1ee7a CSF Firewall t\u1eeb <a href=\"https:\/\/interdata.vn\/blog\/page-la-gi\/\">trang web<\/a> ch\u00ednh th\u1ee9c. \u0110\u1ec3 ti\u1ec7n l\u1ee3i, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u1ec7nh <code>wget<\/code> \u0111\u1ec3 t\u1ea3i tr\u1ef1c ti\u1ebfp CSF Firewall v\u1ec1 m\u00e1y ch\u1ee7 c\u1ee7a m\u00ecnh.<\/p>\n<p><strong>B\u01b0\u1edbc 3: C\u00e0i \u0111\u1eb7t CSF Firewall<\/strong> Khi t\u1ec7p tin \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea3i xu\u1ed1ng, ti\u1ebfn h\u00e0nh gi\u1ea3i n\u00e9n v\u00e0 c\u00e0i \u0111\u1eb7t CSF Firewall. N\u1ebfu h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n \u0111\u00e3 c\u00f3 s\u1eb5n Perl, b\u1ea1n ch\u1ec9 c\u1ea7n ch\u1ea1y l\u1ec7nh c\u00e0i \u0111\u1eb7t. N\u1ebfu ch\u01b0a, b\u1ea1n c\u1ea7n c\u00e0i \u0111\u1eb7t Perl tr\u01b0\u1edbc khi ti\u1ebfp t\u1ee5c.<\/p>\n<p><strong>B\u01b0\u1edbc 4: C\u1ea5u h\u00ecnh CSF Firewall<\/strong> Sau khi ho\u00e0n t\u1ea5t c\u00e0i \u0111\u1eb7t, b\u1ea1n c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u c\u1ea5u h\u00ecnh CSF Firewall. M\u1eb7c \u0111\u1ecbnh, CSF s\u1ebd \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng quan tr\u1ecdng nh\u01b0 SSH, HTTP v\u00e0 FTP, v\u00e0 t\u1ef1 \u0111\u1ed9ng ch\u1eb7n c\u00e1c k\u1ebft n\u1ed1i kh\u00f4ng mong mu\u1ed1n. Tuy nhi\u00ean, b\u1ea1n n\u00ean t\u00f9y ch\u1ec9nh c\u00e1c quy t\u1eafc n\u00e0y sao cho ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u b\u1ea3o m\u1eadt c\u1ee5 th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<p><strong>B\u01b0\u1edbc 5: K\u00edch ho\u1ea1t CSF Firewall<\/strong> Khi c\u1ea5u h\u00ecnh \u0111\u00e3 ho\u00e0n t\u1ea5t, b\u1ea1n c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t CSF Firewall b\u1eb1ng l\u1ec7nh <code>systemctl enable csf.service<\/code> v\u00e0 <code>systemctl start csf.service<\/code> \u0111\u1ec3 kh\u1edfi \u0111\u1ed9ng d\u1ecbch v\u1ee5.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cai-dat-csf-firewall.webp\" alt=\"c\u00e0i \u0111\u1eb7t csf firewall\" width=\"800\" height=\"597\" class=\"aligncenter size-full wp-image-20061\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cai-dat-csf-firewall.webp 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cai-dat-csf-firewall-300x224.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cai-dat-csf-firewall-768x573.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2024\/10\/cai-dat-csf-firewall-750x560.webp 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>L\u01b0u \u00fd quan tr\u1ecdng<\/strong>: Trong qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t v\u00e0 c\u1ea5u h\u00ecnh, h\u00e3y \u0111\u1eb7c bi\u1ec7t c\u1ea9n th\u1eadn \u0111\u1ec3 kh\u00f4ng ch\u1eb7n nh\u1eefng k\u1ebft n\u1ed1i c\u1ea7n thi\u1ebft cho h\u1ec7 th\u1ed1ng. N\u1ebfu kh\u00f4ng ch\u1eafc ch\u1eafn v\u1ec1 c\u00e1c b\u01b0\u1edbc c\u1ea5u h\u00ecnh, b\u1ea1n n\u00ean tham kh\u1ea3o \u00fd ki\u1ebfn t\u1eeb c\u00e1c chuy\u00ean gia b\u1ea3o m\u1eadt ho\u1eb7c \u0111\u01a1n v\u1ecb cung c\u1ea5p d\u1ecbch v\u1ee5 hosting c\u1ee7a m\u00ecnh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Huong-dan-cau-hinh-CSF-Firewall\"><\/span>H\u01b0\u1edbng d\u1eabn c\u1ea5u h\u00ecnh CSF Firewall<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 c\u1ea5u h\u00ecnh CSF Firewall nh\u1eb1m h\u1ea1n ch\u1ebf <a href=\"https:\/\/interdata.vn\/blog\/ddos-la-gi\/\">t\u1ea5n c\u00f4ng DDoS<\/a> tr\u00ean m\u00e1y ch\u1ee7 Linux, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n theo c\u00e1c b\u01b0\u1edbc chi ti\u1ebft d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n<p><strong>B\u01b0\u1edbc 1: T\u00ecm hi\u1ec3u v\u1ec1 t\u1ea5n c\u00f4ng DDoS<\/strong><\/p>\n<p>Tr\u01b0\u1edbc khi ti\u1ebfn h\u00e0nh c\u1ea5u h\u00ecnh, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 b\u1ea1n ph\u1ea3i hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng DDoS, c\u00e1ch ch\u00fang ho\u1ea1t \u0111\u1ed9ng, v\u00e0 t\u00e1c \u0111\u1ed9ng m\u00e0 ch\u00fang c\u00f3 th\u1ec3 g\u00e2y ra \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n. Nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng DDoS ph\u1ed5 bi\u1ebfn bao g\u1ed3m t\u1ea5n c\u00f4ng SYN flood, ICMP flood, UDP flood v\u00e0 HTTP flood. Vi\u1ec7c n\u1eafm b\u1eaft ki\u1ebfn th\u1ee9c n\u00e0y gi\u00fap b\u1ea1n \u0111\u01b0a ra nh\u1eefng bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<p><strong>B\u01b0\u1edbc 2: C\u1ea5u h\u00ecnh h\u1ec7 th\u1ed1ng t\u01b0\u1eddng l\u1eeda<\/strong><\/p>\n<p>\u0110\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro t\u1eeb c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, b\u1ea1n c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh c\u00e1c quy t\u1eafc t\u01b0\u1eddng l\u1eeda \u0111\u1ec3 gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng k\u1ebft n\u1ed1i v\u00e0 l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng t\u1eeb c\u00e1c ngu\u1ed3n \u0111\u00e1ng ng\u1edd. C\u00e1c quy t\u1eafc n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o t\u1ec7p c\u1ea5u h\u00ecnh\u00a0<code>csf.conf<\/code>. V\u00ed d\u1ee5:<\/p>\n<div>\n<pre dir=\"ltr\"># H\u1ea1n ch\u1ebf s\u1ed1 k\u1ebft n\u1ed1i TCP t\u1eeb m\u1ed9t \u0111\u1ecba ch\u1ec9 IP duy nh\u1ea5t\r\nTCP_IN = \"20,21,22,25,53,80,110,143,443\"\r\nTCP_OUT = \"20,21,22,25,53,80,110,143,443\"\r\nCONNLIMIT = \"tcp:20,30\"\r\n\r\n# H\u1ea1n ch\u1ebf s\u1ed1 y\u00eau c\u1ea7u HTTP t\u1eeb m\u1ed9t \u0111\u1ecba ch\u1ec9 IP duy nh\u1ea5t\r\nLF_HTTP_REQ = \"60\"\r\n\r\n# Ch\u1eb7n c\u00e1c g\u00f3i tin ICMP t\u1eeb c\u00e1c \u0111\u1ecba ch\u1ec9 IP \u0111\u00e1ng ng\u1edd\r\nICMP_IN = \"0\"\r\nICMP_OUT = \"0\"\r\nDROP_ICMP = \"1\"\r\n<\/pre>\n<\/div>\n<p><strong>B\u01b0\u1edbc 3: S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3<\/strong><\/p>\n<p>CSF Firewall cung c\u1ea5p nhi\u1ec1u c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 gi\u00fap ki\u1ec3m so\u00e1t v\u00e0 h\u1ea1n ch\u1ebf t\u1ea5n c\u00f4ng DDoS. M\u1ed9t s\u1ed1 l\u1ec7nh ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n<ul>\n<li><code>csf -g<\/code>: Hi\u1ec3n th\u1ecb c\u00e1c \u0111\u1ecba ch\u1ec9 IP \u0111ang k\u1ebft n\u1ed1i \u0111\u1ebfn m\u00e1y ch\u1ee7.<\/li>\n<li><code>csf -r<\/code>: Thi\u1ebft l\u1eadp h\u1ea1n ch\u1ebf t\u1ed1i \u0111a s\u1ed1 k\u1ebft n\u1ed1i t\u1eeb m\u1ed9t \u0111\u1ecba ch\u1ec9 IP.<\/li>\n<li><code>csf -d<\/code>: Ch\u1eb7n \u0111\u1ecba ch\u1ec9 IP \u0111ang t\u1ea5n c\u00f4ng m\u00e1y ch\u1ee7.<\/li>\n<\/ul>\n<p><strong>B\u01b0\u1edbc 4: T\u00f9y ch\u1ec9nh c\u1ea5u h\u00ecnh th\u1eddi gian<\/strong><\/p>\n<p>CSF Firewall cho ph\u00e9p t\u00f9y ch\u1ec9nh c\u00e1c th\u00f4ng s\u1ed1 th\u1eddi gian \u0111\u1ec3 \u0111\u1ed1i ph\u00f3 v\u1edbi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS. B\u1ea1n c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/tham-so-parameter-la-gi\/\">tham s\u1ed1<\/a> trong t\u1ec7p c\u1ea5u h\u00ecnh\u00a0<code>csf.conf<\/code>, ch\u1eb3ng h\u1ea1n nh\u01b0:<\/p>\n<ul>\n<li><code>DENY_TEMP_IP_LIMIT<\/code>: Thi\u1ebft l\u1eadp s\u1ed1 l\u1ea7n t\u1ed1i \u0111a m\u00e0 m\u1ed9t \u0111\u1ecba ch\u1ec9 IP c\u00f3 th\u1ec3 b\u1ecb ch\u1eb7n trong m\u1ed9t kho\u1ea3ng th\u1eddi gian.<\/li>\n<li><code>LF_TRIGGER_PERM_BLOCK<\/code>: X\u00e1c \u0111\u1ecbnh th\u1eddi gian ch\u1eb7n t\u1ea1m th\u1eddi \u0111\u1ec3 chuy\u1ec3n sang ch\u1eb7n v\u0129nh vi\u1ec5n.<\/li>\n<li><code>LF_PERMBLOCK_TIME<\/code>: Thi\u1ebft l\u1eadp th\u1eddi gian ch\u1eb7n v\u0129nh vi\u1ec5n cho m\u1ed9t \u0111\u1ecba ch\u1ec9 IP.<\/li>\n<\/ul>\n<p><strong>B\u01b0\u1edbc 5: Ki\u1ec3m tra v\u00e0 theo d\u00f5i<\/strong><\/p>\n<p>Sau khi ho\u00e0n t\u1ea5t c\u1ea5u h\u00ecnh, b\u1ea1n c\u1ea7n theo d\u00f5i ho\u1ea1t \u0111\u1ed9ng m\u1ea1ng th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS. C\u00e1c c\u00f4ng c\u1ee5 nh\u01b0\u00a0<code>ngrep<\/code>, <code>tcpdump<\/code>, v\u00e0 <code>Wireshark<\/code> c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n gi\u00e1m s\u00e1t l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng chi ti\u1ebft v\u00e0 ph\u1ea3n \u1ee9ng k\u1ecbp th\u1eddi khi c\u00f3 d\u1ea5u hi\u1ec7u b\u1ea5t th\u01b0\u1eddng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Huong-dan-chan-va-cho-phep-dia-chi-IP-trong-CSF-Firewall\"><\/span>H\u01b0\u1edbng d\u1eabn ch\u1eb7n v\u00e0 cho ph\u00e9p \u0111\u1ecba ch\u1ec9 IP trong CSF Firewall<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 ch\u1eb7n v\u00e0 cho ph\u00e9p \u0111\u1ecba ch\u1ec9 IP trong t\u01b0\u1eddng l\u1eeda CSF Firewall, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Huong-dan-chan-dia-chi-IP\"><\/span>H\u01b0\u1edbng d\u1eabn ch\u1eb7n \u0111\u1ecba ch\u1ec9 IP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4>1.\u00a0Ch\u1eb7n IP t\u1eeb d\u00f2ng l\u1ec7nh<\/h4>\n<p>\u0110\u1ec3 b\u1eaft \u0111\u1ea7u, b\u1ea1n c\u1ea7n \u0111\u0103ng nh\u1eadp v\u00e0o m\u00e1y ch\u1ee7 c\u1ee7a m\u00ecnh th\u00f4ng qua SSH v\u1edbi quy\u1ec1n truy c\u1eadp root. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p b\u1ea1n th\u1ef1c hi\u1ec7n c\u00e1c thay \u0111\u1ed5i quan\u00a0tr\u1ecdng tr\u00ean h\u1ec7 th\u1ed1ng.<\/p>\n<p>Sau khi \u0111\u00e3 \u0111\u0103ng nh\u1eadp th\u00e0nh c\u00f4ng, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u1ec7nh sau \u0111\u00e2y \u0111\u1ec3 ch\u1eb7n m\u1ed9t \u0111\u1ecba ch\u1ec9 IP c\u1ee5 th\u1ec3 m\u00e0 b\u1ea1n mu\u1ed1n ng\u0103n ch\u1eb7n truy c\u1eadp v\u00e0o m\u00e1y ch\u1ee7 c\u1ee7a m\u00ecnh:<\/p>\n<pre>```bash\r\ncsf -d \r\n```<\/pre>\n<p>V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n mu\u1ed1n ch\u1eb7n \u0111\u1ecba ch\u1ec9 IP l\u00e0 192.168.1.2, b\u1ea1n s\u1ebd g\u00f5 l\u1ec7nh nh\u01b0 sau:<\/p>\n<pre>```bash\r\ncsf -d 192.168.1.2\r\n```\r\n<\/pre>\n<p>Vi\u1ec7c ch\u1eb7n IP n\u00e0y r\u1ea5t h\u1eefu \u00edch trong vi\u1ec7c b\u1ea3o v\u1ec7 m\u00e1y ch\u1ee7 kh\u1ecfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ho\u1eb7c truy c\u1eadp kh\u00f4ng mong mu\u1ed1n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2-Chan-IP-tu-WHM-neu-ban-dang-su-dung-cPanel\"><\/span>2. Ch\u1eb7n IP t\u1eeb WHM (n\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng cPanel)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>N\u1ebfu b\u1ea1n \u0111ang qu\u1ea3n l\u00fd m\u00e1y ch\u1ee7 th\u00f4ng qua <a href=\"https:\/\/interdata.vn\/blog\/whm-la-gi\/\">WHM<\/a> v\u00e0 c\u00f3 <a href=\"https:\/\/interdata.vn\/blog\/root-access-la-gi\/\">quy\u1ec1n root<\/a>, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng ch\u1eb7n IP m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng d\u00f2ng l\u1ec7nh.<\/li>\n<li>\u0110\u1ea7u ti\u00ean, h\u00e3y \u0111\u0103ng nh\u1eadp v\u00e0o giao di\u1ec7n WHM v\u1edbi t\u00e0i kho\u1ea3n root c\u1ee7a b\u1ea1n.<\/li>\n<li>Ti\u1ebfp theo, t\u00ecm \u0111\u1ebfn ph\u1ea7n <strong>Plugins<\/strong> trong menu b\u00ean tr\u00e1i, sau \u0111\u00f3 ch\u1ecdn <strong>ConfigServer Security &amp; Firewall<\/strong>. \u0110\u00e2y l\u00e0 n\u01a1i b\u1ea1n c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd c\u00e1c thi\u1ebft l\u1eadp b\u1ea3o m\u1eadt cho m\u00e1y ch\u1ee7 c\u1ee7a m\u00ecnh.<\/li>\n<li>Trong giao di\u1ec7n ConfigServer, b\u1ea1n s\u1ebd th\u1ea5y m\u1ee5c <strong>Quick Deny<\/strong>. T\u1ea1i \u0111\u00e2y, b\u1ea1n ch\u1ec9 c\u1ea7n nh\u1eadp \u0111\u1ecba ch\u1ec9 IP m\u00e0 b\u1ea1n mu\u1ed1n ch\u1eb7n v\u00e0o \u00f4 tr\u1ed1ng v\u00e0 nh\u1ea5n n\u00fat <strong>Quick Deny<\/strong>. H\u1ec7 th\u1ed1ng s\u1ebd t\u1ef1 \u0111\u1ed9ng th\u1ef1c hi\u1ec7n vi\u1ec7c ch\u1eb7n IP \u0111\u00f3 ngay l\u1eadp t\u1ee9c.<\/li>\n<\/ul>\n<p>C\u00e1ch n\u00e0y gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 d\u1ec5 d\u00e0ng h\u01a1n trong vi\u1ec7c qu\u1ea3n l\u00fd b\u1ea3o m\u1eadt cho m\u00e1y ch\u1ee7.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Chan-mot-dai-dia-chi-IP\"><\/span>3. Ch\u1eb7n m\u1ed9t d\u1ea3i \u0111\u1ecba ch\u1ec9 IP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ngo\u00e0i vi\u1ec7c ch\u1eb7n t\u1eebng \u0111\u1ecba ch\u1ec9 IP ri\u00eang l\u1ebb, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 ch\u1eb7n m\u1ed9t d\u1ea3i \u0111\u1ecba ch\u1ec9 IP n\u1ebfu b\u1ea1n nh\u1eadn th\u1ea5y r\u1eb1ng nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP trong c\u00f9ng m\u1ed9t d\u1ea3i c\u00f3 h\u00e0nh vi \u0111\u00e1ng ng\u1edd.<\/p>\n<p>\u0110\u1ec3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00fa ph\u00e1p sau:<\/p>\n<pre>```bash\r\ncsf -d \r\n```<\/pre>\n<p>V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n mu\u1ed1n ch\u1eb7n to\u00e0n b\u1ed9 d\u1ea3i IP t\u1eeb 192.168.1.0 \u0111\u1ebfn 192.168.1.255, b\u1ea1n s\u1ebd s\u1eed d\u1ee5ng l\u1ec7nh nh\u01b0 sau:<\/p>\n<pre>```bash\r\ncsf -d 192.168.1.0\/24\r\n```\r\n<\/pre>\n<p>Vi\u1ec7c ch\u1eb7n m\u1ed9t d\u1ea3i IP gi\u00fap b\u1ea1n b\u1ea3o v\u1ec7 m\u00e1y ch\u1ee7 kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda ti\u1ec1m \u1ea9n t\u1eeb m\u1ed9t nh\u00f3m \u0111\u1ecba ch\u1ec9 IP, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi b\u1ea1n ph\u00e1t hi\u1ec7n ra r\u1eb1ng ch\u00fang c\u00f3 li\u00ean quan \u0111\u1ebfn c\u00e1c ho\u1ea1t \u0111\u1ed9ng x\u1ea5u ho\u1eb7c kh\u00f4ng h\u1ee3p l\u1ec7.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Huong-dan-cho-phep-dia-chi-IP\"><\/span>H\u01b0\u1edbng d\u1eabn cho ph\u00e9p \u0111\u1ecba ch\u1ec9 IP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4>C\u00e1ch cho ph\u00e9p m\u1ed9t \u0111\u1ecba ch\u1ec9 IP t\u1eeb d\u00f2ng l\u1ec7nh<\/h4>\n<p>\u0110\u1ea7u ti\u00ean, b\u1ea1n c\u1ea7n \u0111\u0103ng nh\u1eadp v\u00e0o m\u00e1y ch\u1ee7 c\u1ee7a m\u00ecnh th\u00f4ng qua <a href=\"https:\/\/interdata.vn\/blog\/ssh-la-gi\/\">giao th\u1ee9c SSH<\/a> v\u1edbi quy\u1ec1n truy c\u1eadp root. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec ch\u1ec9 c\u00f3 t\u00e0i kho\u1ea3n root m\u1edbi c\u00f3 \u0111\u1ee7 quy\u1ec1n \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c thay \u0111\u1ed5i li\u00ean quan \u0111\u1ebfn <a href=\"https:\/\/interdata.vn\/blog\/bao-mat-mang\/\">b\u1ea3o m\u1eadt m\u1ea1ng<\/a>.<\/p>\n<p>Sau khi \u0111\u00e3 \u0111\u0103ng nh\u1eadp th\u00e0nh c\u00f4ng, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u1ec7nh sau \u0111\u1ec3 cho ph\u00e9p m\u1ed9t \u0111\u1ecba ch\u1ec9 IP c\u1ee5 th\u1ec3 truy c\u1eadp v\u00e0o m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n. C\u00fa ph\u00e1p l\u1ec7nh nh\u01b0 sau:<\/p>\n<pre> bash\r\n csf -a<\/pre>\n<p><code>V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n mu\u1ed1n cho ph\u00e9p \u0111\u1ecba ch\u1ec9 IP 192.168.1.10, b\u1ea1n s\u1ebd nh\u1eadp l\u1ec7nh nh\u01b0 sau:<br \/>\n<\/code><\/p>\n<pre> bash\r\n csf -a 192.168.1.10<\/pre>\n<p><code>L\u1ec7nh n\u00e0y s\u1ebd th\u00eam \u0111\u1ecba ch\u1ec9 IP v\u00e0o danh s\u00e1ch cho ph\u00e9p, gi\u00fap ng\u01b0\u1eddi d\u00f9ng t\u1eeb \u0111\u1ecba ch\u1ec9 \u0111\u00f3 c\u00f3 th\u1ec3 truy c\u1eadp m\u00e0 kh\u00f4ng b\u1ecb ch\u1eb7n.<\/code><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cach-cho-phep-mot-dai-dia-chi-IP\"><\/span>C\u00e1ch cho ph\u00e9p m\u1ed9t d\u1ea3i \u0111\u1ecba ch\u1ec9 IP<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu b\u1ea1n mu\u1ed1n cho ph\u00e9p m\u1ed9t d\u1ea3i \u0111\u1ecba ch\u1ec9 IP, quy tr\u00ecnh c\u0169ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 khi b\u1ea1n cho ph\u00e9p m\u1ed9t \u0111\u1ecba ch\u1ec9 IP \u0111\u01a1n l\u1ebb. Tuy nhi\u00ean, c\u00fa ph\u00e1p s\u1ebd h\u01a1i kh\u00e1c m\u1ed9t ch\u00fat \u0111\u1ec3 c\u00f3 th\u1ec3 bao g\u1ed3m nhi\u1ec1u \u0111\u1ecba ch\u1ec9 trong c\u00f9ng m\u1ed9t l\u1ec7nh. B\u1ea1n s\u1ebd s\u1eed d\u1ee5ng c\u00fa ph\u00e1p nh\u01b0 sau:<\/p>\n<pre> bash\r\n csf -a<\/pre>\n<p>V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n mu\u1ed1n cho ph\u00e9p to\u00e0n b\u1ed9 d\u1ea3i IP t\u1eeb 192.168.1.0 \u0111\u1ebfn 192.168.1.255, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u1ec7nh sau:<code><br \/>\n<\/code><\/p>\n<pre> bash\r\n csf -a 192.168.1.0\/24<\/pre>\n<p>D\u1ea3i IP n\u00e0y s\u1ebd cho ph\u00e9p t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ecba ch\u1ec9 trong kho\u1ea3ng t\u1eeb 192.168.1.1 \u0111\u1ebfn 192.168.1.254, gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng qu\u1ea3n l\u00fd quy\u1ec1n truy c\u1eadp cho nhi\u1ec1u thi\u1ebft b\u1ecb trong c\u00f9ng m\u1ed9t m\u1ea1ng m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i th\u00eam t\u1eebng \u0111\u1ecba ch\u1ec9 m\u1ed9t c\u00e1ch th\u1ee7 c\u00f4ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Luu-y-quan-trong\"><\/span>L\u01b0u \u00fd quan tr\u1ecdng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sau khi b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n c\u00e1c thay \u0111\u1ed5i c\u1ea7n thi\u1ebft trong c\u1ea5u h\u00ecnh c\u1ee7a t\u01b0\u1eddng l\u1eeda CSF, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 kh\u1edfi \u0111\u1ed9ng l\u1ea1i d\u1ecbch v\u1ee5 n\u00e0y \u0111\u1ec3 c\u00e1c thay \u0111\u1ed5i c\u00f3 hi\u1ec7u l\u1ef1c. \u0110\u1ec3 l\u00e0m \u0111i\u1ec1u \u0111\u00f3, b\u1ea1n ch\u1ec9 c\u1ea7n s\u1eed d\u1ee5ng l\u1ec7nh sau trong terminal:<\/p>\n<pre>csf -r<\/pre>\n<p>L\u1ec7nh n\u00e0y s\u1ebd gi\u00fap b\u1ea1n kh\u1edfi \u0111\u1ed9ng l\u1ea1i CSF v\u00e0 \u00e1p d\u1ee5ng t\u1ea5t c\u1ea3 c\u00e1c c\u1ea5u h\u00ecnh m\u1edbi m\u00e0 b\u1ea1n \u0111\u00e3 thi\u1ebft l\u1eadp. Vi\u1ec7c kh\u1edfi \u0111\u1ed9ng l\u1ea1i l\u00e0 r\u1ea5t quan tr\u1ecdng v\u00ec n\u1ebfu kh\u00f4ng th\u1ef1c hi\u1ec7n, nh\u1eefng thay \u0111\u1ed5i b\u1ea1n \u0111\u00e3 th\u1ef1c hi\u1ec7n s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c h\u1ec7 th\u1ed1ng nh\u1eadn di\u1ec7n v\u00e0 \u00e1p d\u1ee5ng.<\/p>\n<p>Ngo\u00e0i ra, \u0111\u1ec3 qu\u1ea3n l\u00fd c\u00e1c \u0111\u1ecba ch\u1ec9 IP b\u1ecb ch\u1eb7n ho\u1eb7c \u0111\u01b0\u1ee3c ph\u00e9p truy c\u1eadp v\u00e0o m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n, CSF l\u01b0u tr\u1eef th\u00f4ng tin n\u00e0y trong hai t\u1ec7p kh\u00e1c nhau. C\u1ee5 th\u1ec3, c\u00e1c \u0111\u1ecba ch\u1ec9 IP b\u1ecb ch\u1eb7n s\u1ebd \u0111\u01b0\u1ee3c ghi l\u1ea1i trong t\u1ec7p c\u00f3 \u0111\u01b0\u1eddng d\u1eabn <code>\/etc\/csf\/csf.deny<\/code>, trong khi c\u00e1c \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c cho ph\u00e9p s\u1ebd n\u1eb1m trong t\u1ec7p <code>\/etc\/csf\/csf.allow<\/code>. \u0110i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng theo d\u00f5i v\u00e0 qu\u1ea3n l\u00fd quy\u1ec1n truy c\u1eadp c\u1ee7a t\u1eebng \u0111\u1ecba ch\u1ec9 IP m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n<p>N\u1ebfu b\u1ea1n c\u00f3 nhu c\u1ea7u th\u00eam nhi\u1ec1u \u0111\u1ecba ch\u1ec9 IP v\u00e0o danh s\u00e1ch cho ph\u00e9p ho\u1eb7c b\u1ecb ch\u1eb7n, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t t\u1ec7p ri\u00eang bi\u1ec7t cho c\u00e1c \u0111\u1ecba ch\u1ec9 n\u00e0y. Sau \u0111\u00f3, b\u1ea1n ch\u1ec9 c\u1ea7n ch\u1ec9 \u0111\u1ecbnh \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ebfn t\u1ec7p \u0111\u00f3 trong c\u1ea5u h\u00ecnh c\u1ee7a CSF. Vi\u1ec7c n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap b\u1ea1n t\u1ed5 ch\u1ee9c t\u1ed1t h\u01a1n m\u00e0 c\u00f2n ti\u1ebft ki\u1ec7m th\u1eddi gian khi c\u1ea7n th\u00eam ho\u1eb7c x\u00f3a c\u00e1c \u0111\u1ecba ch\u1ec9 IP.<\/p>\n<p>B\u1eb1ng c\u00e1ch th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc tr\u00ean, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp c\u1ee7a c\u00e1c \u0111\u1ecba ch\u1ec9 IP tr\u00ean m\u00e1y ch\u1ee7 c\u1ee7a m\u00ecnh th\u00f4ng qua t\u01b0\u1eddng l\u1eeda CSF. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o an to\u00e0n cho h\u1ec7 th\u1ed1ng m\u00e0 c\u00f2n gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y ch\u1ee7.<\/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: <a href=\"https:\/\/interdata.vn\/vietnam-dedicated-server\/\">thu\u00ea Server<\/a>, <a href=\"https:\/\/interdata.vn\/cloud-server\/\">thu\u00ea Cloud Server<\/a>, <a href=\"https:\/\/interdata.vn\/thue-vps\/\">thu\u00ea VPS<\/a> v\u00e0 <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 <a href=\"https:\/\/interdata.vn\/blog\/cpu-amd-epyc\/\">AMD EPYC<\/a> Gen3 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>H\u00e3y li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i qua <a href=\"https:\/\/interdata.vn\/blog\/website-la-gi\/\">website<\/a> ho\u1eb7c hotline 1900.636822 \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n chi ti\u1ebft v\u00e0 ch\u1ecdn g\u00f3i d\u1ecbch v\u1ee5 ph\u00f9 h\u1ee3p!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CSF Firewall l\u00e0 m\u1ed9t ph\u1ea7n m\u1ec1m t\u01b0\u1eddng l\u1eeda m\u00e3 ngu\u1ed3n m\u1edf \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh ri\u00eang cho h\u1ec7 \u0111i\u1ec1u h\u00e0nh Linux, gi\u00fap b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda m\u1ea1ng. CSF h\u1ed7 tr\u1ee3 qu\u1ea3n l\u00fd quy\u1ec1n truy c\u1eadp hi\u1ec7u qu\u1ea3 th\u00f4ng qua danh s\u00e1ch whitelist v\u00e0 blacklist. \u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n<\/p>\n","protected":false},"author":2,"featured_media":20062,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-19981","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hosting"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/19981","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=19981"}],"version-history":[{"count":0,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/19981\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/20062"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=19981"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=19981"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=19981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}