{"id":10765,"date":"2025-09-09T09:14:37","date_gmt":"2025-09-09T02:14:37","guid":{"rendered":"https:\/\/onesme.vn\/blog\/?p=10765"},"modified":"2025-11-27T09:55:44","modified_gmt":"2025-11-27T02:55:44","slug":"firewall","status":"publish","type":"post","link":"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html","title":{"rendered":"Firewall l\u00e0 g\u00ec? To\u00e0n t\u1eadp A-Z v\u1ec1 &#8220;Ng\u01b0\u1eddi b\u1ea3o v\u1ec7&#8221; cho h\u1ec7 th\u1ed1ng m\u1ea1ng"},"content":{"rendered":"<p style=\"text-align: justify;\"><strong><em>Firewall <\/em><\/strong><em>(T\u01b0\u1eddng l\u1eeda)<\/em> <em>l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng an ninh m\u1ea1ng, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t r\u00e0o ch\u1eafn b\u1ea3o v\u1ec7 gi\u1eefa m\u1ea1ng n\u1ed9i b\u1ed9 an to\u00e0n c\u1ee7a b\u1ea1n v\u00e0 m\u1ea1ng Internet kh\u00f4ng \u0111\u00e1ng tin c\u1eady b\u00ean ngo\u00e0i. Gi\u1ed1ng nh\u01b0 m\u1ed9t ng\u01b0\u1eddi b\u1ea3o v\u1ec7 \u1edf c\u1ed5ng, t\u01b0\u1eddng l\u1eeda ki\u1ec3m so\u00e1t t\u1ea5t c\u1ea3 c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u ra v\u00e0o v\u00e0 quy\u1ebft \u0111\u1ecbnh cho ph\u00e9p hay ch\u1eb7n d\u1ef1a tr\u00ean c\u00e1c quy t\u1eafc b\u1ea3o m\u1eadt \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u ph\u00e2n t\u00edch m\u1ecdi kh\u00eda c\u1ea1nh c\u1ee7a &#8220;ng\u01b0\u1eddi b\u1ea3o v\u1ec7 th\u1ea7m l\u1eb7ng&#8221; n\u00e0y, t\u1eeb c\u00e1ch ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i h\u00ecnh ph\u1ed5 bi\u1ebfn \u0111\u1ebfn t\u1ea7m quan tr\u1ecdng kh\u00f4ng th\u1ec3 thi\u1ebfu c\u1ee7a n\u00f3 trong th\u1ebf gi\u1edbi s\u1ed1.<\/em><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_43 ez-toc-wrap-left counter-hierarchy ez-toc-counter 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\" area-label=\"ez-toc-toggle-icon-1\"><label for=\"item-69e099558933d\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #000000;color:#000000\" 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: #000000;color:#000000\" 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><\/label><input  type=\"checkbox\" id=\"item-69e099558933d\"><\/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:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#1_Firewall_la_gi_Giai_thich_don_gian_nhat\" title=\"1. Firewall l\u00e0 g\u00ec? Gi\u1ea3i th\u00edch \u0111\u01a1n gi\u1ea3n nh\u1ea5t\">1. Firewall l\u00e0 g\u00ec? Gi\u1ea3i th\u00edch \u0111\u01a1n gi\u1ea3n nh\u1ea5t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#2_Cach_thuc_hoat_dong_cua_Firewall_Tu_co_ban_den_nang_cao\" title=\"2. C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Firewall: T\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao\">2. C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Firewall: T\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#21_Nguyen_tac_co_ban_Kiem_tra_va_loc_goi_tin_Packet_Filtering\" title=\"2.1. Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n: Ki\u1ec3m tra v\u00e0 l\u1ecdc g\u00f3i tin (Packet Filtering)\">2.1. Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n: Ki\u1ec3m tra v\u00e0 l\u1ecdc g\u00f3i tin (Packet Filtering)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#22_Cac_phuong_phap_loc_nang_cao\" title=\"2.2. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u1ecdc n\u00e2ng cao\">2.2. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u1ecdc n\u00e2ng cao<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#221_Kiem_tra_trang_thai_Stateful_Inspection\" title=\"2.2.1. Ki\u1ec3m tra tr\u1ea1ng th\u00e1i (Stateful Inspection)\">2.2.1. Ki\u1ec3m tra tr\u1ea1ng th\u00e1i (Stateful Inspection)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#222_Cong_uy_nhiem_Proxy_Firewall\" title=\"2.2.2. C\u1ed5ng \u1ee7y nhi\u1ec7m (Proxy Firewall)\">2.2.2. C\u1ed5ng \u1ee7y nhi\u1ec7m (Proxy Firewall)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#223_Tuong_lua_the_he_moi_Next-Generation_Firewall_-_NGFW\" title=\"2.2.3. T\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi (Next-Generation Firewall &#8211; NGFW)\">2.2.3. T\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi (Next-Generation Firewall &#8211; NGFW)<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#3_Phan_loai_Firewall_7_loai_hinh_pho_bien_nhat\" title=\"3. Ph\u00e2n lo\u1ea1i Firewall: 7 lo\u1ea1i h\u00ecnh ph\u1ed5 bi\u1ebfn nh\u1ea5t\">3. Ph\u00e2n lo\u1ea1i Firewall: 7 lo\u1ea1i h\u00ecnh ph\u1ed5 bi\u1ebfn nh\u1ea5t<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#31_Phan_loai_theo_phuong_thuc_trien_khai\" title=\"3.1. Ph\u00e2n lo\u1ea1i theo ph\u01b0\u01a1ng th\u1ee9c tri\u1ec3n khai\">3.1. Ph\u00e2n lo\u1ea1i theo ph\u01b0\u01a1ng th\u1ee9c tri\u1ec3n khai<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#311_Firewall_phan_cung_Hardware_Firewall\" title=\"3.1.1. Firewall ph\u1ea7n c\u1ee9ng (Hardware Firewall)\">3.1.1. Firewall ph\u1ea7n c\u1ee9ng (Hardware Firewall)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#312_Firewall_phan_mem_Software_Firewall\" title=\"3.1.2. Firewall ph\u1ea7n m\u1ec1m (Software Firewall)\">3.1.2. Firewall ph\u1ea7n m\u1ec1m (Software Firewall)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#32_Phan_loai_theo_cong_nghe_va_chuc_nang\" title=\"3.2. Ph\u00e2n lo\u1ea1i theo c\u00f4ng ngh\u1ec7 v\u00e0 ch\u1ee9c n\u0103ng\">3.2. Ph\u00e2n lo\u1ea1i theo c\u00f4ng ngh\u1ec7 v\u00e0 ch\u1ee9c n\u0103ng<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#321_Stateless_Firewall_Tuong_lua_khong_trang_thai\" title=\"3.2.1. Stateless Firewall (T\u01b0\u1eddng l\u1eeda kh\u00f4ng tr\u1ea1ng th\u00e1i)\">3.2.1. Stateless Firewall (T\u01b0\u1eddng l\u1eeda kh\u00f4ng tr\u1ea1ng th\u00e1i)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#322_Stateful_Firewall_Tuong_lua_trang_thai\" title=\"3.2.2. Stateful Firewall (T\u01b0\u1eddng l\u1eeda tr\u1ea1ng th\u00e1i)\">3.2.2. Stateful Firewall (T\u01b0\u1eddng l\u1eeda tr\u1ea1ng th\u00e1i)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#323_Proxy_Firewall_Tuong_lua_Proxy\" title=\"3.2.3. Proxy Firewall (T\u01b0\u1eddng l\u1eeda Proxy)\">3.2.3. Proxy Firewall (T\u01b0\u1eddng l\u1eeda Proxy)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#324_Next-Generation_Firewall_NGFW_-_Tuong_lua_the_he_moi\" title=\"3.2.4. Next-Generation Firewall (NGFW &#8211; T\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi)\">3.2.4. Next-Generation Firewall (NGFW &#8211; T\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#325_Web_Application_Firewall_WAF_-_Tuong_lua_ung_dung_web\" title=\"3.2.5. Web Application Firewall (WAF &#8211; T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web)\">3.2.5. Web Application Firewall (WAF &#8211; T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web)<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#4_Tai_sao_Firewall_lai_quan_trong_den_vay_4_Loi_ich_cot_loi\" title=\"4. T\u1ea1i sao Firewall l\u1ea1i quan tr\u1ecdng \u0111\u1ebfn v\u1eady? 4 L\u1ee3i \u00edch c\u1ed1t l\u00f5i\">4. T\u1ea1i sao Firewall l\u1ea1i quan tr\u1ecdng \u0111\u1ebfn v\u1eady? 4 L\u1ee3i \u00edch c\u1ed1t l\u00f5i<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#41_Ngan_chan_truy_cap_trai_phep\" title=\"4.1. Ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p\">4.1. Ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#42_Bao_ve_khoi_Malware_va_cac_cuoc_tan_cong_tinh_vi\" title=\"4.2. B\u1ea3o v\u1ec7 kh\u1ecfi Malware v\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tinh vi\">4.2. B\u1ea3o v\u1ec7 kh\u1ecfi Malware v\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tinh vi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#43_Kiem_soat_chinh_sach_va_Toi_uu_hoa_viec_su_dung_mang\" title=\"4.3. Ki\u1ec3m so\u00e1t ch\u00ednh s\u00e1ch v\u00e0 T\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng m\u1ea1ng\">4.3. Ki\u1ec3m so\u00e1t ch\u00ednh s\u00e1ch v\u00e0 T\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng m\u1ea1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#44_Giam_sat_Ghi_nhat_ky_va_Ho_tro_dieu_tra_Forensics\" title=\"4.4. Gi\u00e1m s\u00e1t, Ghi nh\u1eadt k\u00fd v\u00e0 H\u1ed7 tr\u1ee3 \u0111i\u1ec1u tra (Forensics)\">4.4. Gi\u00e1m s\u00e1t, Ghi nh\u1eadt k\u00fd v\u00e0 H\u1ed7 tr\u1ee3 \u0111i\u1ec1u tra (Forensics)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#5_Han_che_cua_Firewall_Nhung_gi_Firewall_khong_the_lam\" title=\"5. H\u1ea1n ch\u1ebf c\u1ee7a Firewall: Nh\u1eefng g\u00ec Firewall kh\u00f4ng th\u1ec3 l\u00e0m\">5. H\u1ea1n ch\u1ebf c\u1ee7a Firewall: Nh\u1eefng g\u00ec Firewall kh\u00f4ng th\u1ec3 l\u00e0m<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#51_Khong_the_chong_lai_cac_cuoc_tan_cong_khong_di_qua_no\" title=\"5.1. Kh\u00f4ng th\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4ng \u0111i qua n\u00f3\">5.1. Kh\u00f4ng th\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4ng \u0111i qua n\u00f3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#52_Khong_the_ngan_chan_cac_moi_de_doa_tu_ben_trong_Internal_Threats\" title=\"5.2. Kh\u00f4ng th\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c m\u1ed1i \u0111e d\u1ecda t\u1eeb b\u00ean trong (Internal Threats)\">5.2. Kh\u00f4ng th\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c m\u1ed1i \u0111e d\u1ecda t\u1eeb b\u00ean trong (Internal Threats)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#53_Co_the_bi_bo_qua_boi_cac_cuoc_tan_cong_chua_tung_duoc_biet_den_va_tan_cong_phi_ky_thuat\" title=\"5.3. C\u00f3 th\u1ec3 b\u1ecb &#8220;b\u1ecf qua&#8221; b\u1edfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ch\u01b0a t\u1eebng \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u00e0 t\u1ea5n c\u00f4ng phi k\u1ef9 thu\u1eadt\">5.3. C\u00f3 th\u1ec3 b\u1ecb &#8220;b\u1ecf qua&#8221; b\u1edfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ch\u01b0a t\u1eebng \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u00e0 t\u1ea5n c\u00f4ng phi k\u1ef9 thu\u1eadt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#54_Mot_cau_hinh_sai_co_the_tao_ra_cac_lo_hong_bao_mat_nghiem_trong\" title=\"5.4. M\u1ed9t c\u1ea5u h\u00ecnh sai c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt nghi\u00eam tr\u1ecdng\">5.4. M\u1ed9t c\u1ea5u h\u00ecnh sai c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt nghi\u00eam tr\u1ecdng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#6_Giai_phap_Firewall_chuyen_nghiep_Dich_vu_VNPT_Managed_Firewall\" title=\"6. Gi\u1ea3i ph\u00e1p Firewall chuy\u00ean nghi\u1ec7p: D\u1ecbch v\u1ee5 VNPT Managed Firewall\">6. Gi\u1ea3i ph\u00e1p Firewall chuy\u00ean nghi\u1ec7p: D\u1ecbch v\u1ee5 VNPT Managed Firewall<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#7_Giai_dap_cac_cau_hoi_thuong_gap_ve_Firewall_FAQ\" title=\"7. Gi\u1ea3i \u0111\u00e1p c\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Firewall (FAQ)\">7. Gi\u1ea3i \u0111\u00e1p c\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Firewall (FAQ)<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#71_Firewall_khac_gi_so_voi_phan_mem_diet_Virus\" title=\"7.1. Firewall kh\u00e1c g\u00ec so v\u1edbi ph\u1ea7n m\u1ec1m di\u1ec7t Virus?\">7.1. Firewall kh\u00e1c g\u00ec so v\u1edbi ph\u1ea7n m\u1ec1m di\u1ec7t Virus?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#72_Toi_co_can_ca_Firewall_phan_cung_va_phan_mem_khong\" title=\"7.2. T\u00f4i c\u00f3 c\u1ea7n c\u1ea3 Firewall ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m kh\u00f4ng?\">7.2. T\u00f4i c\u00f3 c\u1ea7n c\u1ea3 Firewall ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m kh\u00f4ng?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/onesme.vn\/blog\/tin-tuc-su-kien\/firewall.html\/#73_Firewall_mac_dinh_cua_WindowsmacOS_co_du_tot_khong\" title=\"7.3. Firewall m\u1eb7c \u0111\u1ecbnh c\u1ee7a Windows\/macOS c\u00f3 \u0111\u1ee7 t\u1ed1t kh\u00f4ng?\">7.3. Firewall m\u1eb7c \u0111\u1ecbnh c\u1ee7a Windows\/macOS c\u00f3 \u0111\u1ee7 t\u1ed1t kh\u00f4ng?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"1_Firewall_la_gi_Giai_thich_don_gian_nhat\"><\/span>1. Firewall l\u00e0 g\u00ec? Gi\u1ea3i th\u00edch \u0111\u01a1n gi\u1ea3n nh\u1ea5t<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\"><strong>Firewall (T\u01b0\u1eddng l\u1eeda)<\/strong> l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng an ninh m\u1ea1ng thi\u1ebft y\u1ebfu, c\u00f3 th\u1ec3 \u1edf d\u1ea1ng ph\u1ea7n c\u1ee9ng ho\u1eb7c ph\u1ea7n m\u1ec1m. V\u1ec1 b\u1ea3n ch\u1ea5t, T\u01b0\u1eddng l\u1eeda ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t r\u00e0o ch\u1eafn ki\u1ec3m so\u00e1t an ninh, \u0111\u1ee9ng gi\u1eefa m\u1ed9t m\u1ea1ng m\u00e1y t\u00ednh \u0111\u00e1ng tin c\u1eady (nh\u01b0 m\u1ea1ng n\u1ed9i b\u1ed9\/LAN c\u1ee7a b\u1ea1n) v\u00e0 m\u1ed9t m\u1ea1ng kh\u00f4ng \u0111\u00e1ng tin c\u1eady b\u00ean ngo\u00e0i (\u0111i\u1ec3n h\u00ecnh l\u00e0 Internet). M\u1ee5c ti\u00eau duy nh\u1ea5t c\u1ee7a Firewall l\u00e0 gi\u00e1m s\u00e1t v\u00e0 l\u1ecdc l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp m\u1ea1ng d\u1ef1a tr\u00ean m\u1ed9t b\u1ed9 quy t\u1eafc b\u1ea3o m\u1eadt \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh s\u1eb5n.<\/p>\n<p style=\"text-align: justify;\">\u0110\u1ec3 d\u1ec5 h\u00ecnh dung nh\u1ea5t, h\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng Firewall gi\u1ed1ng nh\u01b0 m\u1ed9t <strong>ng\u01b0\u1eddi b\u1ea3o v\u1ec7 chuy\u00ean nghi\u1ec7p \u0111\u1ee9ng g\u00e1c \u1edf c\u1ed5ng ch\u00ednh c\u1ee7a m\u1ed9t t\u00f2a nh\u00e0:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>T\u00f2a nh\u00e0<\/strong> ch\u00ednh l\u00e0 m\u1ea1ng n\u1ed9i b\u1ed9 (m\u1ea1ng c\u00f4ng ty, m\u1ea1ng gia \u0111\u00ecnh) c\u1ee7a b\u1ea1n.<\/li>\n<li style=\"text-align: justify;\"><strong>Th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i<\/strong> l\u00e0 m\u1ea1ng Internet r\u1ed9ng l\u1edbn.<\/li>\n<li style=\"text-align: justify;\"><strong>Ng\u01b0\u1eddi b\u1ea3o v\u1ec7 (Firewall)<\/strong> s\u1ebd ki\u1ec3m tra &#8220;gi\u1ea5y t\u1edd t\u00f9y th\u00e2n&#8221; (th\u00f4ng tin g\u00f3i tin) c\u1ee7a t\u1ea5t c\u1ea3 m\u1ecdi ng\u01b0\u1eddi (d\u1eef li\u1ec7u) mu\u1ed1n \u0111i ra ho\u1eb7c \u0111i v\u00e0o.<\/li>\n<li style=\"text-align: justify;\">D\u1ef1a tr\u00ean m\u1ed9t <strong>danh s\u00e1ch c\u00e1c &#8220;quy t\u1eafc&#8221; (rules\/policies)<\/strong> \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp s\u1eb5n (v\u00ed d\u1ee5: &#8220;ch\u1ec9 cho ph\u00e9p nh\u00e2n vi\u00ean c\u00f3 th\u1ebb ra v\u00e0o&#8221;, &#8220;kh\u00f4ng cho ph\u00e9p ng\u01b0\u1eddi l\u1ea1 m\u1eb7t v\u00e0o&#8221;), ng\u01b0\u1eddi b\u1ea3o v\u1ec7 s\u1ebd quy\u1ebft \u0111\u1ecbnh <strong>cho ph\u00e9p (Allow)<\/strong> ai \u0111\u01b0\u1ee3c v\u00e0o, v\u00e0 <strong>t\u1eeb ch\u1ed1i (Deny)<\/strong> ai ph\u1ea3i \u1edf ngo\u00e0i.<\/li>\n<\/ul>\n<figure id=\"attachment_10767\" aria-describedby=\"caption-attachment-10767\" style=\"width: 764px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10767 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-la-mot-he-thong-an-ninh-mang-hoat-dong-nhu-mot-rao-chan-bao-ve-giua-mang-noi-bo-an-toan-cua-ban-va-mang-internet-khong-dang-tin-cay-ben-ngoai.png\" alt=\"Firewall l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng an ninh m\u1ea1ng\" width=\"764\" height=\"420\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-la-mot-he-thong-an-ninh-mang-hoat-dong-nhu-mot-rao-chan-bao-ve-giua-mang-noi-bo-an-toan-cua-ban-va-mang-internet-khong-dang-tin-cay-ben-ngoai.png 764w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-la-mot-he-thong-an-ninh-mang-hoat-dong-nhu-mot-rao-chan-bao-ve-giua-mang-noi-bo-an-toan-cua-ban-va-mang-internet-khong-dang-tin-cay-ben-ngoai-300x165.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-la-mot-he-thong-an-ninh-mang-hoat-dong-nhu-mot-rao-chan-bao-ve-giua-mang-noi-bo-an-toan-cua-ban-va-mang-internet-khong-dang-tin-cay-ben-ngoai-150x82.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-la-mot-he-thong-an-ninh-mang-hoat-dong-nhu-mot-rao-chan-bao-ve-giua-mang-noi-bo-an-toan-cua-ban-va-mang-internet-khong-dang-tin-cay-ben-ngoai-696x383.png 696w\" sizes=\"auto, (max-width: 764px) 100vw, 764px\" \/><figcaption id=\"caption-attachment-10767\" class=\"wp-caption-text\">Firewall l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng an ninh m\u1ea1ng, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t r\u00e0o ch\u1eafn b\u1ea3o v\u1ec7 gi\u1eefa m\u1ea1ng n\u1ed9i b\u1ed9 an to\u00e0n c\u1ee7a b\u1ea1n v\u00e0 m\u1ea1ng Internet kh\u00f4ng \u0111\u00e1ng tin c\u1eady b\u00ean ngo\u00e0i<\/figcaption><\/figure>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"2_Cach_thuc_hoat_dong_cua_Firewall_Tu_co_ban_den_nang_cao\"><\/span>2. C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Firewall: T\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">\u0110\u1ec3 th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 c\u1ee7a m\u1ed9t &#8220;ng\u01b0\u1eddi b\u1ea3o v\u1ec7&#8221;, Firewall kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng m\u1ed9t c\u00e1ch ng\u1eabu nhi\u00ean. N\u00f3 d\u1ef1a tr\u00ean m\u1ed9t lo\u1ea1t c\u00e1c ph\u01b0\u01a1ng ph\u00e1p v\u00e0 c\u00f4ng ngh\u1ec7, t\u1eeb \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn ph\u1ee9c t\u1ea1p, \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh cho t\u1eebng m\u1ea9u d\u1eef li\u1ec7u \u0111i qua n\u00f3.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"21_Nguyen_tac_co_ban_Kiem_tra_va_loc_goi_tin_Packet_Filtering\"><\/span>2.1. Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n: Ki\u1ec3m tra v\u00e0 l\u1ecdc g\u00f3i tin (Packet Filtering)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 h\u00ecnh th\u1ee9c ho\u1ea1t \u0111\u1ed9ng s\u01a1 khai v\u00e0 n\u1ec1n t\u1ea3ng nh\u1ea5t c\u1ee7a m\u1ecdi Firewall, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u01b0\u1eddng l\u1eeda kh\u00f4ng tr\u1ea1ng th\u00e1i (Stateless Firewall).<\/p>\n<p style=\"text-align: justify;\"><strong>C\u01a1 ch\u1ebf:<\/strong> M\u1ecdi d\u1eef li\u1ec7u di chuy\u1ec3n tr\u00ean Internet \u0111\u1ec1u \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c ph\u1ea7n nh\u1ecf g\u1ecdi l\u00e0 <strong>&#8220;g\u00f3i tin&#8221; (packets)<\/strong>. Firewall s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t tr\u1ea1m ki\u1ec3m so\u00e1t, ki\u1ec3m tra &#8220;gi\u1ea5y th\u00f4ng h\u00e0nh&#8221; \u2013 t\u1ee9c l\u00e0 ph\u1ea7n th\u00f4ng tin ti\u00eau \u0111\u1ec1 (header) \u2013 c\u1ee7a m\u1ed7i g\u00f3i tin m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp. C\u00e1c th\u00f4ng tin \u0111\u01b0\u1ee3c ki\u1ec3m tra bao g\u1ed3m:<\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>\u0110\u1ecba ch\u1ec9 IP ngu\u1ed3n v\u00e0 \u0111\u00edch:<\/strong> G\u00f3i tin n\u00e0y \u0111\u1ebfn t\u1eeb \u0111\u00e2u v\u00e0 s\u1ebd \u0111i \u0111\u00e2u?<\/li>\n<li style=\"text-align: justify;\"><strong>C\u1ed5ng (Port) ngu\u1ed3n v\u00e0 \u0111\u00edch:<\/strong> G\u00f3i tin \u0111ang c\u1ed1 g\u1eafng s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 n\u00e0o (truy c\u1eadp web &#8211; c\u1ed5ng 80\/443, g\u1eedi email &#8211; c\u1ed5ng 25&#8230;)?<\/li>\n<li style=\"text-align: justify;\"><strong>Giao th\u1ee9c (Protocol):<\/strong> G\u00f3i tin \u0111ang d\u00f9ng giao th\u1ee9c g\u00ec (TCP, UDP, ICMP&#8230;)?<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>Ra quy\u1ebft \u0111\u1ecbnh:<\/strong> D\u1ef1a tr\u00ean m\u1ed9t danh s\u00e1ch c\u00e1c quy t\u1eafc \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh s\u1eb5n (g\u1ecdi l\u00e0 Access Control List &#8211; ACL), Firewall s\u1ebd so s\u00e1nh th\u00f4ng tin c\u1ee7a g\u00f3i tin v\u1edbi danh s\u00e1ch n\u00e0y v\u00e0 ra quy\u1ebft \u0111\u1ecbnh: <strong>Cho ph\u00e9p (Allow)<\/strong> ho\u1eb7c <strong>T\u1eeb ch\u1ed1i (Deny)<\/strong>.<\/p>\n<p style=\"text-align: justify;\"><strong>H\u1ea1n ch\u1ebf:<\/strong> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y kh\u00e1 c\u1ee9ng nh\u1eafc v\u00ec Firewall kh\u00f4ng hi\u1ec3u \u0111\u01b0\u1ee3c &#8220;ng\u1eef c\u1ea3nh&#8221; c\u1ee7a m\u1ed9t k\u1ebft n\u1ed1i. T\u01b0\u1eddng l\u1eeda x\u1eed l\u00fd t\u1eebng g\u00f3i tin m\u1ed9t c\u00e1ch ri\u00eang l\u1ebb m\u00e0 kh\u00f4ng bi\u1ebft li\u1ec7u g\u00f3i tin \u0111\u00f3 c\u00f3 ph\u1ea3i l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a m\u1ed9t cu\u1ed9c h\u1ed9i tho\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp h\u1ee3p l\u1ec7 hay kh\u00f4ng.<\/p>\n<figure id=\"attachment_10771\" aria-describedby=\"caption-attachment-10771\" style=\"width: 697px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10771 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/kiem-tra-va-loc-goi-tin-la-hinh-thuc-hoat-dong-so-khai-va-nen-tang-nhat-cua-moi-firewall.png\" alt=\"Ki\u1ec3m tra v\u00e0 l\u1ecdc g\u00f3i tin l\u00e0 h\u00ecnh th\u1ee9c ho\u1ea1t \u0111\u1ed9ng s\u01a1 khai v\u00e0 n\u1ec1n t\u1ea3ng nh\u1ea5t c\u1ee7a m\u1ecdi Firewall\" width=\"697\" height=\"371\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/kiem-tra-va-loc-goi-tin-la-hinh-thuc-hoat-dong-so-khai-va-nen-tang-nhat-cua-moi-firewall.png 697w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/kiem-tra-va-loc-goi-tin-la-hinh-thuc-hoat-dong-so-khai-va-nen-tang-nhat-cua-moi-firewall-300x160.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/kiem-tra-va-loc-goi-tin-la-hinh-thuc-hoat-dong-so-khai-va-nen-tang-nhat-cua-moi-firewall-150x80.png 150w\" sizes=\"auto, (max-width: 697px) 100vw, 697px\" \/><figcaption id=\"caption-attachment-10771\" class=\"wp-caption-text\">Ki\u1ec3m tra v\u00e0 l\u1ecdc g\u00f3i tin l\u00e0 h\u00ecnh th\u1ee9c ho\u1ea1t \u0111\u1ed9ng s\u01a1 khai v\u00e0 n\u1ec1n t\u1ea3ng nh\u1ea5t c\u1ee7a m\u1ecdi Firewall<\/figcaption><\/figure>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"22_Cac_phuong_phap_loc_nang_cao\"><\/span>2.2. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u1ecdc n\u00e2ng cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">\u0110\u1ec3 kh\u1eafc ph\u1ee5c nh\u1eefng h\u1ea1n ch\u1ebf c\u1ee7a vi\u1ec7c l\u1ecdc g\u00f3i tin c\u01a1 b\u1ea3n, c\u00e1c c\u00f4ng ngh\u1ec7 Firewall hi\u1ec7n \u0111\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u1edbi kh\u1ea3 n\u0103ng th\u00f4ng minh h\u01a1n r\u1ea5t nhi\u1ec1u.<\/p>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"221_Kiem_tra_trang_thai_Stateful_Inspection\"><\/span>2.2.1. Ki\u1ec3m tra tr\u1ea1ng th\u00e1i (Stateful Inspection)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 m\u1ed9t b\u01b0\u1edbc ti\u1ebfn v\u01b0\u1ee3t b\u1eadc so v\u1edbi l\u1ecdc g\u00f3i tin c\u01a1 b\u1ea3n. T\u01b0\u1eddng l\u1eeda tr\u1ea1ng th\u00e1i (Stateful Firewall) kh\u00f4ng ch\u1ec9 ki\u1ec3m tra th\u00f4ng tin ti\u00eau \u0111\u1ec1 c\u1ee7a t\u1eebng g\u00f3i tin ri\u00eang l\u1ebb m\u00e0 c\u00f2n <strong>theo d\u00f5i v\u00e0 &#8220;ghi nh\u1edb&#8221; tr\u1ea1ng th\u00e1i c\u1ee7a to\u00e0n b\u1ed9 m\u1ed9t k\u1ebft n\u1ed1i m\u1ea1ng<\/strong>.<\/p>\n<p style=\"text-align: justify;\"><strong>C\u01a1 ch\u1ebf:<\/strong> N\u00f3 duy tr\u00ec m\u1ed9t &#8220;b\u1ea3ng tr\u1ea1ng th\u00e1i&#8221; (state table) \u0111\u1ec3 ghi l\u1ea1i c\u00e1c th\u00f4ng tin v\u1ec1 nh\u1eefng k\u1ebft n\u1ed1i \u0111ang ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<p style=\"text-align: justify;\"><strong>V\u00ed d\u1ee5:<\/strong> Khi b\u1ea1n truy c\u1eadp m\u1ed9t website, m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n s\u1ebd kh\u1edfi t\u1ea1o m\u1ed9t k\u1ebft n\u1ed1i TCP th\u00f4ng qua quy tr\u00ecnh &#8220;b\u1eaft tay ba b\u01b0\u1edbc&#8221;. T\u01b0\u1eddng l\u1eeda tr\u1ea1ng th\u00e1i s\u1ebd ghi nh\u1eadn k\u1ebft n\u1ed1i h\u1ee3p l\u1ec7 n\u00e0y. Sau \u0111\u00f3, t\u1ea5t c\u1ea3 c\u00e1c g\u00f3i tin ph\u1ea3n h\u1ed3i t\u1eeb website \u0111\u00f3, v\u1ed1n l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a &#8220;cu\u1ed9c h\u1ed9i tho\u1ea1i&#8221; \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp s\u1ebd \u0111\u01b0\u1ee3c t\u1ef1 \u0111\u1ed9ng cho ph\u00e9p \u0111i qua m\u00e0 kh\u00f4ng c\u1ea7n ki\u1ec3m tra l\u1ea1i t\u1eeb \u0111\u1ea7u theo b\u1ed9 quy t\u1eafc. N\u00f3 ch\u1ec9 c\u1ea7n x\u00e1c nh\u1eadn r\u1eb1ng g\u00f3i tin n\u00e0y thu\u1ed9c v\u1ec1 m\u1ed9t k\u1ebft n\u1ed1i \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t trong b\u1ea3ng tr\u1ea1ng th\u00e1i.<\/p>\n<p style=\"text-align: justify;\"><strong>L\u1ee3i \u00edch:<\/strong> T\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt (ch\u1ec9 cho ph\u00e9p c\u00e1c g\u00f3i tin ph\u1ea3n h\u1ed3i t\u1eeb nh\u1eefng k\u1ebft n\u1ed1i do b\u00ean trong ch\u1ee7 \u0111\u1ed9ng t\u1ea1o ra) v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t.<\/p>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"222_Cong_uy_nhiem_Proxy_Firewall\"><\/span>2.2.2. C\u1ed5ng \u1ee7y nhi\u1ec7m (Proxy Firewall)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">Lo\u1ea1i t\u01b0\u1eddng l\u1eeda n\u00e0y ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ed9t t\u1ea7ng cao h\u01a1n (T\u1ea7ng 7 &#8211; \u1ee8ng d\u1ee5ng) v\u00e0 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t <strong>ng\u01b0\u1eddi trung gian<\/strong> cho c\u00e1c k\u1ebft n\u1ed1i m\u1ea1ng.<\/p>\n<p style=\"text-align: justify;\"><strong>C\u01a1 ch\u1ebf:<\/strong> Thay v\u00ec cho ph\u00e9p k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp gi\u1eefa m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n v\u00e0 m\u00e1y ch\u1ee7 tr\u00ean Internet, Proxy Firewall s\u1ebd \u0111\u1ee9ng ra nh\u1eadn y\u00eau c\u1ea7u t\u1eeb b\u1ea1n. Sau \u0111\u00f3, n\u00f3 s\u1ebd t\u1ea1o m\u1ed9t k\u1ebft n\u1ed1i ho\u00e0n to\u00e0n m\u1edbi t\u1eeb ch\u00ednh n\u00f3 \u0111\u1ebfn m\u00e1y ch\u1ee7 \u0111\u00edch.<\/p>\n<p style=\"text-align: justify;\"><strong>L\u1ee3i \u00edch:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Che gi\u1ea5u danh t\u00ednh:<\/strong> M\u00e1y ch\u1ee7 b\u00ean ngo\u00e0i s\u1ebd ch\u1ec9 th\u1ea5y \u0111\u1ecba ch\u1ec9 IP c\u1ee7a Proxy Firewall, gi\u00fap che gi\u1ea5u \u0111\u1ecba ch\u1ec9 IP th\u1eadt c\u1ee7a m\u1ea1ng n\u1ed9i b\u1ed9.<\/li>\n<li style=\"text-align: justify;\"><strong>Ki\u1ec3m tra n\u1ed9i dung s\u00e2u:<\/strong> V\u00ec ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7ng \u1ee9ng d\u1ee5ng, Proxy c\u00f3 th\u1ec3 &#8220;\u0111\u1ecdc&#8221; v\u00e0 ki\u1ec3m tra n\u1ed9i dung b\u00ean trong c\u00e1c g\u00f3i tin, kh\u00f4ng ch\u1ec9 l\u00e0 th\u00f4ng tin ti\u00eau \u0111\u1ec1. N\u00f3 c\u00f3 th\u1ec3 l\u1ecdc c\u00e1c trang web \u0111\u1ed9c h\u1ea1i, ch\u1eb7n c\u00e1c n\u1ed9i dung kh\u00f4ng ph\u00f9 h\u1ee3p.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong> Qu\u00e1 tr\u00ecnh x\u1eed l\u00fd qua trung gian c\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u0111\u1ed9 tr\u1ec5 v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 m\u1ea1ng.<\/p>\n<figure id=\"attachment_10776\" aria-describedby=\"caption-attachment-10776\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10776 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-o-mot-tang-cao-hon-va-dong-vai-tro-nhu-mot-nguoi-trung-gian-cho-cac-ket-noi-mang.png\" alt=\"Proxy Firewall ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ed9t t\u1ea7ng cao h\u01a1n v\u00e0 l\u00e0 m\u1ed9t trung gian cho c\u00e1c k\u1ebft n\u1ed1i m\u1ea1ng\" width=\"800\" height=\"480\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-o-mot-tang-cao-hon-va-dong-vai-tro-nhu-mot-nguoi-trung-gian-cho-cac-ket-noi-mang.png 800w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-o-mot-tang-cao-hon-va-dong-vai-tro-nhu-mot-nguoi-trung-gian-cho-cac-ket-noi-mang-300x180.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-o-mot-tang-cao-hon-va-dong-vai-tro-nhu-mot-nguoi-trung-gian-cho-cac-ket-noi-mang-768x461.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-o-mot-tang-cao-hon-va-dong-vai-tro-nhu-mot-nguoi-trung-gian-cho-cac-ket-noi-mang-150x90.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-o-mot-tang-cao-hon-va-dong-vai-tro-nhu-mot-nguoi-trung-gian-cho-cac-ket-noi-mang-696x418.png 696w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-10776\" class=\"wp-caption-text\">Proxy Firewall ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ed9t t\u1ea7ng cao h\u01a1n v\u00e0 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t ng\u01b0\u1eddi trung gian cho c\u00e1c k\u1ebft n\u1ed1i m\u1ea1ng<\/figcaption><\/figure>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"223_Tuong_lua_the_he_moi_Next-Generation_Firewall_-_NGFW\"><\/span>2.2.3. T\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi (Next-Generation Firewall &#8211; NGFW)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u1eddng l\u1eeda ti\u00ean ti\u1ebfn v\u00e0 to\u00e0n di\u1ec7n nh\u1ea5t hi\u1ec7n nay. NGFW kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 duy nh\u1ea5t, m\u00e0 l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a t\u01b0\u1eddng l\u1eeda tr\u1ea1ng th\u00e1i truy\u1ec1n th\u1ed1ng v\u1edbi nhi\u1ec1u l\u1edbp b\u1ea3o m\u1eadt th\u00f4ng minh kh\u00e1c.<\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Ki\u1ec3m tra s\u00e2u g\u00f3i tin (Deep Packet Inspection &#8211; DPI):<\/strong> N\u1ebfu c\u00e1c t\u01b0\u1eddng l\u1eeda c\u0169 ch\u1ec9 &#8220;\u0111\u1ecdc phong b\u00ec&#8221; (th\u00f4ng tin ti\u00eau \u0111\u1ec1), th\u00ec NGFW c\u00f3 kh\u1ea3 n\u0103ng &#8220;m\u1edf l\u00e1 th\u01b0 ra \u0111\u1ecdc&#8221; (ki\u1ec3m tra c\u1ea3 n\u1ed9i dung b\u00ean trong g\u00f3i tin). \u0110i\u1ec1u n\u00e0y cho ph\u00e9p n\u00f3 ph\u00e1t hi\u1ec7n c\u00e1c m\u1ed1i \u0111e d\u1ecda tinh vi nh\u01b0 m\u00e3 \u0111\u1ed9c, virus hay c\u00e1c d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m \u0111ang b\u1ecb tu\u1ed3n ra ngo\u00e0i.<\/li>\n<li style=\"text-align: justify;\"><strong>Nh\u1eadn bi\u1ebft \u1ee9ng d\u1ee5ng (Application Awareness): <\/strong>\u0110\u00e2y l\u00e0 m\u1ed9t b\u01b0\u1edbc \u0111\u1ed9t ph\u00e1 l\u1edbn. NGFW c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 ki\u1ec3m so\u00e1t c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 \u0111ang ch\u1ea1y tr\u00ean m\u1ea1ng, b\u1ea5t k\u1ec3 ch\u00fang s\u1eed d\u1ee5ng c\u1ed5ng n\u00e0o. V\u00ed d\u1ee5, n\u00f3 c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c \u0111\u00e2u l\u00e0 l\u01b0u l\u01b0\u1ee3ng c\u1ee7a Facebook, YouTube, Zalo v\u00e0 cho ph\u00e9p qu\u1ea3n tr\u1ecb vi\u00ean thi\u1ebft l\u1eadp c\u00e1c quy t\u1eafc nh\u01b0: &#8220;Cho ph\u00e9p truy c\u1eadp web, nh\u01b0ng ch\u1eb7n Facebook trong gi\u1edd l\u00e0m vi\u1ec7c&#8221;.<\/li>\n<li style=\"text-align: justify;\"><strong>T\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp (IPS &#8211; Intrusion Prevention System):<\/strong> IPS ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t h\u1ec7 th\u1ed1ng an ninh ch\u1ee7 \u0111\u1ed9ng. N\u00f3 li\u00ean t\u1ee5c qu\u00e9t l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng \u0111\u1ec3 t\u00ecm ki\u1ebfm c\u00e1c &#8220;d\u1ea5u hi\u1ec7u&#8221; (signatures) c\u1ee7a c\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng \u0111\u00e3 bi\u1ebft (v\u00ed d\u1ee5: c\u00e1c h\u00e0nh vi qu\u00e9t c\u1ed5ng, khai th\u00e1c l\u1ed7 h\u1ed5ng&#8230;). Khi ph\u00e1t hi\u1ec7n m\u1ed9t h\u00e0nh vi \u0111\u00e1ng ng\u1edd, IPS c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng ch\u1eb7n ngay l\u1eadp t\u1ee9c \u0111\u1ec3 ng\u0103n ch\u1eb7n cu\u1ed9c t\u1ea5n c\u00f4ng tr\u01b0\u1edbc khi n\u00f3 g\u00e2y ra thi\u1ec7t h\u1ea1i.<\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"3_Phan_loai_Firewall_7_loai_hinh_pho_bien_nhat\"><\/span>3. Ph\u00e2n lo\u1ea1i Firewall: 7 lo\u1ea1i h\u00ecnh ph\u1ed5 bi\u1ebfn nh\u1ea5t<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">T\u01b0\u1eddng l\u1eeda kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 \u0111\u01a1n l\u1ebb m\u00e0 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m r\u1ed9ng, bao g\u1ed3m nhi\u1ec1u lo\u1ea1i h\u00ecnh kh\u00e1c nhau. Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean hai ti\u00eau ch\u00ed ch\u00ednh: ph\u01b0\u01a1ng th\u1ee9c tri\u1ec3n khai (n\u01a1i n\u00f3 \u0111\u01b0\u1ee3c \u0111\u1eb7t) v\u00e0 c\u00f4ng ngh\u1ec7 ho\u1ea1t \u0111\u1ed9ng (c\u00e1ch n\u00f3 ki\u1ec3m tra d\u1eef li\u1ec7u).<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"31_Phan_loai_theo_phuong_thuc_trien_khai\"><\/span>3.1. Ph\u00e2n lo\u1ea1i theo ph\u01b0\u01a1ng th\u1ee9c tri\u1ec3n khai<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"311_Firewall_phan_cung_Hardware_Firewall\"><\/span>3.1.1. Firewall ph\u1ea7n c\u1ee9ng (Hardware Firewall)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb v\u1eadt l\u00fd chuy\u00ean d\u1ee5ng, \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf &#8220;c\u1eeda ng\u00f5&#8221; c\u1ee7a m\u1ed9t m\u1ea1ng l\u01b0\u1edbi, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 chu vi (perimeter security) gi\u1eefa m\u1ea1ng n\u1ed9i b\u1ed9 (LAN) v\u00e0 Internet b\u00ean ngo\u00e0i. T\u1ea5t c\u1ea3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111i ra v\u00e0 \u0111i v\u00e0o m\u1ea1ng \u0111\u1ec1u ph\u1ea3i \u0111i qua thi\u1ebft b\u1ecb n\u00e0y \u0111\u1ec3 \u0111\u01b0\u1ee3c ki\u1ec3m tra.<\/p>\n<p style=\"text-align: justify;\"><strong>\u01afu \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>B\u1ea3o v\u1ec7 to\u00e0n di\u1ec7n:<\/strong> Ch\u1ec9 c\u1ea7n m\u1ed9t thi\u1ebft b\u1ecb l\u00e0 c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 cho to\u00e0n b\u1ed9 c\u00e1c m\u00e1y t\u00ednh b\u00ean trong m\u1ea1ng.<\/li>\n<li style=\"text-align: justify;\"><strong>Hi\u1ec7u su\u1ea5t cao:<\/strong> V\u00ec l\u00e0 ph\u1ea7n c\u1ee9ng chuy\u00ean d\u1ee5ng, n\u00f3 c\u00f3 b\u1ed9 x\u1eed l\u00fd v\u00e0 b\u1ed9 nh\u1edb ri\u00eang, ho\u1ea1t \u0111\u1ed9ng m\u1ea1nh m\u1ebd m\u00e0 kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c m\u00e1y t\u00ednh trong m\u1ea1ng.<\/li>\n<li style=\"text-align: justify;\"><strong>Qu\u1ea3n l\u00fd t\u1eadp trung:<\/strong> M\u1ecdi quy t\u1eafc b\u1ea3o m\u1eadt \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp v\u00e0 qu\u1ea3n l\u00fd t\u1ea1i m\u1ed9t n\u01a1i duy nh\u1ea5t.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Chi ph\u00ed ban \u0111\u1ea7u cao:<\/strong> Vi\u1ec7c mua s\u1eafm m\u1ed9t thi\u1ebft b\u1ecb t\u01b0\u1eddng l\u1eeda ph\u1ea7n c\u1ee9ng chuy\u00ean d\u1ee5ng th\u01b0\u1eddng t\u1ed1n k\u00e9m.<\/li>\n<li style=\"text-align: justify;\"><strong>\u0110i\u1ec3m l\u1ed7i \u0111\u01a1n (Single Point of Failure):<\/strong> N\u1ebfu thi\u1ebft b\u1ecb t\u01b0\u1eddng l\u1eeda g\u1eb7p s\u1ef1 c\u1ed1, to\u00e0n b\u1ed9 k\u1ebft n\u1ed1i Internet c\u1ee7a m\u1ea1ng c\u00f3 th\u1ec3 b\u1ecb gi\u00e1n \u0111o\u1ea1n (tr\u1eeb khi \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh d\u1ef1 ph\u00f2ng).<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>Ph\u00f9 h\u1ee3p v\u1edbi:<\/strong> C\u00e1c doanh nghi\u1ec7p, v\u0103n ph\u00f2ng, v\u00e0 th\u1eadm ch\u00ed c\u1ea3 c\u00e1c gia \u0111\u00ecnh c\u00f3 nhu c\u1ea7u b\u1ea3o m\u1eadt cao.<\/p>\n<figure id=\"attachment_10769\" aria-describedby=\"caption-attachment-10769\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10769 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-cung-la-mot-thiet-bi-vat-ly-chuyen-dung-duoc-dat-o-cua-ngo-cua-mot-mang-luoi-hoat-dong-nhu-mot-lop-bao-ve-chu-vi-giua-mang-noi-bo-va-internet-ben-ngoai.png\" alt=\"Firewall ph\u1ea7n c\u1ee9ng l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb v\u1eadt l\u00fd chuy\u00ean d\u1ee5ng, \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf &quot;c\u1eeda ng\u00f5&quot; c\u1ee7a m\u1ed9t m\u1ea1ng l\u01b0\u1edbi\" width=\"500\" height=\"353\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-cung-la-mot-thiet-bi-vat-ly-chuyen-dung-duoc-dat-o-cua-ngo-cua-mot-mang-luoi-hoat-dong-nhu-mot-lop-bao-ve-chu-vi-giua-mang-noi-bo-va-internet-ben-ngoai.png 500w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-cung-la-mot-thiet-bi-vat-ly-chuyen-dung-duoc-dat-o-cua-ngo-cua-mot-mang-luoi-hoat-dong-nhu-mot-lop-bao-ve-chu-vi-giua-mang-noi-bo-va-internet-ben-ngoai-300x212.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-cung-la-mot-thiet-bi-vat-ly-chuyen-dung-duoc-dat-o-cua-ngo-cua-mot-mang-luoi-hoat-dong-nhu-mot-lop-bao-ve-chu-vi-giua-mang-noi-bo-va-internet-ben-ngoai-150x106.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><figcaption id=\"caption-attachment-10769\" class=\"wp-caption-text\">Firewall ph\u1ea7n c\u1ee9ng l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb v\u1eadt l\u00fd chuy\u00ean d\u1ee5ng, \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf &#8220;c\u1eeda ng\u00f5&#8221; c\u1ee7a m\u1ed9t m\u1ea1ng l\u01b0\u1edbi, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 chu vi gi\u1eefa m\u1ea1ng n\u1ed9i b\u1ed9 v\u00e0 Internet b\u00ean ngo\u00e0i<\/figcaption><\/figure>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"312_Firewall_phan_mem_Software_Firewall\"><\/span>3.1.2. Firewall ph\u1ea7n m\u1ec1m (Software Firewall)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh ph\u1ea7n m\u1ec1m \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t tr\u1ef1c ti\u1ebfp tr\u00ean t\u1eebng m\u00e1y t\u00ednh ho\u1eb7c m\u00e1y ch\u1ee7 (g\u1ecdi l\u00e0 \u0111i\u1ec3m cu\u1ed1i &#8211; endpoint). Firewall ph\u1ea7n m\u1ec1m ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng \u0111\u1ebfn v\u00e0 \u0111i t\u1eeb ch\u00ednh thi\u1ebft b\u1ecb \u0111\u00f3. V\u00ed d\u1ee5 ti\u00eau bi\u1ec3u nh\u1ea5t ch\u00ednh l\u00e0 <strong>Windows Defender Firewall<\/strong> c\u00f3 s\u1eb5n tr\u00ean m\u00e1y t\u00ednh Windows c\u1ee7a b\u1ea1n.<\/p>\n<p style=\"text-align: justify;\"><strong>\u01afu \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>B\u1ea3o v\u1ec7 t\u1eebng \u0111i\u1ec3m cu\u1ed1i:<\/strong> L\u00fd t\u01b0\u1edfng \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c thi\u1ebft b\u1ecb c\u00e1 nh\u00e2n, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi ch\u00fang di chuy\u1ec3n ra ngo\u00e0i m\u1ea1ng c\u00f4ng ty (v\u00ed d\u1ee5: laptop c\u1ee7a nh\u00e2n vi\u00ean l\u00e0m vi\u1ec7c t\u1eeb xa).<\/li>\n<li style=\"text-align: justify;\"><strong>Ki\u1ec3m so\u00e1t \u1ee9ng d\u1ee5ng chi ti\u1ebft:<\/strong> Cho ph\u00e9p b\u1ea1n thi\u1ebft l\u1eadp quy t\u1eafc cho t\u1eebng \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 tr\u00ean m\u00e1y t\u00ednh (v\u00ed d\u1ee5: cho ph\u00e9p tr\u00ecnh duy\u1ec7t Chrome truy c\u1eadp Internet nh\u01b0ng ch\u1eb7n m\u1ed9t ph\u1ea7n m\u1ec1m l\u1ea1).<\/li>\n<li style=\"text-align: justify;\"><strong>Ch\u1ed1ng l\u1ea1i c\u00e1c m\u1ed1i \u0111e d\u1ecda n\u1ed9i b\u1ed9:<\/strong> C\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n virus l\u00e2y lan t\u1eeb m\u00e1y t\u00ednh n\u00e0y sang m\u00e1y t\u00ednh kh\u00e1c trong c\u00f9ng m\u1ed9t m\u1ea1ng LAN.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Ti\u00eau t\u1ed1n t\u00e0i nguy\u00ean:<\/strong> S\u1eed d\u1ee5ng m\u1ed9t ph\u1ea7n CPU v\u00e0 RAM c\u1ee7a m\u00e1y t\u00ednh \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<li style=\"text-align: justify;\"><strong>Qu\u1ea3n l\u00fd ph\u00e2n t\u00e1n:<\/strong> C\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t v\u00e0 c\u1ea5u h\u00ecnh tr\u00ean t\u1eebng m\u00e1y t\u00ednh ri\u00eang l\u1ebb, g\u00e2y kh\u00f3 kh\u0103n cho vi\u1ec7c qu\u1ea3n l\u00fd \u0111\u1ed3ng b\u1ed9 trong doanh nghi\u1ec7p l\u1edbn.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>Ph\u00f9 h\u1ee3p v\u1edbi:<\/strong> Ng\u01b0\u1eddi d\u00f9ng c\u00e1 nh\u00e2n v\u00e0 l\u00e0 m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 b\u1ed5 sung c\u1ea7n thi\u1ebft trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p.<\/p>\n<figure id=\"attachment_10770\" aria-describedby=\"caption-attachment-10770\" style=\"width: 1200px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10770 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-mem-la-mot-chuong-trinh-phan-mem-duoc-cai-dat-truc-tiep-tren-tung-may-tinh-hoac-may-chu.png\" alt=\"Firewall ph\u1ea7n m\u1ec1m \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t tr\u1ef1c ti\u1ebfp tr\u00ean t\u1eebng m\u00e1y t\u00ednh ho\u1eb7c m\u00e1y ch\u1ee7\" width=\"1200\" height=\"750\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-mem-la-mot-chuong-trinh-phan-mem-duoc-cai-dat-truc-tiep-tren-tung-may-tinh-hoac-may-chu.png 1200w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-mem-la-mot-chuong-trinh-phan-mem-duoc-cai-dat-truc-tiep-tren-tung-may-tinh-hoac-may-chu-300x188.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-mem-la-mot-chuong-trinh-phan-mem-duoc-cai-dat-truc-tiep-tren-tung-may-tinh-hoac-may-chu-1024x640.png 1024w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-mem-la-mot-chuong-trinh-phan-mem-duoc-cai-dat-truc-tiep-tren-tung-may-tinh-hoac-may-chu-768x480.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-mem-la-mot-chuong-trinh-phan-mem-duoc-cai-dat-truc-tiep-tren-tung-may-tinh-hoac-may-chu-150x94.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-mem-la-mot-chuong-trinh-phan-mem-duoc-cai-dat-truc-tiep-tren-tung-may-tinh-hoac-may-chu-696x435.png 696w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-phan-mem-la-mot-chuong-trinh-phan-mem-duoc-cai-dat-truc-tiep-tren-tung-may-tinh-hoac-may-chu-1068x668.png 1068w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption id=\"caption-attachment-10770\" class=\"wp-caption-text\">Firewall ph\u1ea7n m\u1ec1m l\u00e0 m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh ph\u1ea7n m\u1ec1m \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t tr\u1ef1c ti\u1ebfp tr\u00ean t\u1eebng m\u00e1y t\u00ednh ho\u1eb7c m\u00e1y ch\u1ee7<\/figcaption><\/figure>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"32_Phan_loai_theo_cong_nghe_va_chuc_nang\"><\/span>3.2. Ph\u00e2n lo\u1ea1i theo c\u00f4ng ngh\u1ec7 v\u00e0 ch\u1ee9c n\u0103ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 s\u1ef1 ti\u1ebfn h\u00f3a c\u1ee7a c\u00f4ng ngh\u1ec7 t\u01b0\u1eddng l\u1eeda qua c\u00e1c th\u1ebf h\u1ec7.<\/p>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"321_Stateless_Firewall_Tuong_lua_khong_trang_thai\"><\/span>3.2.1. Stateless Firewall (T\u01b0\u1eddng l\u1eeda kh\u00f4ng tr\u1ea1ng th\u00e1i)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 th\u1ebf h\u1ec7 t\u01b0\u1eddng l\u1eeda \u0111\u1ea7u ti\u00ean, ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean t\u1eafc <strong>l\u1ecdc g\u00f3i tin c\u01a1 b\u1ea3n<\/strong>. N\u00f3 ki\u1ec3m tra th\u00f4ng tin ti\u00eau \u0111\u1ec1 (IP, c\u1ed5ng) c\u1ee7a t\u1eebng g\u00f3i tin m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp v\u00e0 so s\u00e1nh v\u1edbi b\u1ed9 quy t\u1eafc. Stateless Firewall nhanh nh\u01b0ng kh\u00f4ng th\u00f4ng minh v\u00ec kh\u00f4ng &#8220;nh\u1edb&#8221; \u0111\u01b0\u1ee3c ng\u1eef c\u1ea3nh c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i.<\/p>\n<figure id=\"attachment_10778\" aria-describedby=\"caption-attachment-10778\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10778 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateless-firewall-la-the-he-tuong-lua-dau-tien-hoat-dong-dua-tren-nguyen-tac-loc-goi-tin-co-ban.png\" alt=\"Stateless Firewall l\u00e0 th\u1ebf h\u1ec7 t\u01b0\u1eddng l\u1eeda \u0111\u1ea7u ti\u00ean, ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean t\u1eafc l\u1ecdc g\u00f3i tin c\u01a1 b\u1ea3n\" width=\"1000\" height=\"500\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateless-firewall-la-the-he-tuong-lua-dau-tien-hoat-dong-dua-tren-nguyen-tac-loc-goi-tin-co-ban.png 1000w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateless-firewall-la-the-he-tuong-lua-dau-tien-hoat-dong-dua-tren-nguyen-tac-loc-goi-tin-co-ban-300x150.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateless-firewall-la-the-he-tuong-lua-dau-tien-hoat-dong-dua-tren-nguyen-tac-loc-goi-tin-co-ban-768x384.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateless-firewall-la-the-he-tuong-lua-dau-tien-hoat-dong-dua-tren-nguyen-tac-loc-goi-tin-co-ban-150x75.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateless-firewall-la-the-he-tuong-lua-dau-tien-hoat-dong-dua-tren-nguyen-tac-loc-goi-tin-co-ban-696x348.png 696w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption id=\"caption-attachment-10778\" class=\"wp-caption-text\">Stateless Firewall l\u00e0 th\u1ebf h\u1ec7 t\u01b0\u1eddng l\u1eeda \u0111\u1ea7u ti\u00ean, ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean t\u1eafc l\u1ecdc g\u00f3i tin c\u01a1 b\u1ea3n<\/figcaption><\/figure>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"322_Stateful_Firewall_Tuong_lua_trang_thai\"><\/span>3.2.2. Stateful Firewall (T\u01b0\u1eddng l\u1eeda tr\u1ea1ng th\u00e1i)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 m\u1ed9t b\u01b0\u1edbc ti\u1ebfn l\u1edbn. Stateful Firewall kh\u00f4ng ch\u1ec9 ki\u1ec3m tra t\u1eebng g\u00f3i tin m\u00e0 c\u00f2n <strong>theo d\u00f5i v\u00e0 duy tr\u00ec tr\u1ea1ng th\u00e1i c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i m\u1ea1ng<\/strong>. T\u01b0\u1eddng l\u1eeda tr\u1ea1ng th\u00e1i bi\u1ebft m\u1ed9t k\u1ebft n\u1ed1i \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp h\u1ee3p l\u1ec7 hay ch\u01b0a, v\u00e0 ch\u1ec9 cho ph\u00e9p c\u00e1c g\u00f3i tin thu\u1ed9c v\u1ec1 nh\u1eefng k\u1ebft n\u1ed1i h\u1ee3p l\u1ec7 \u0111\u00f3 \u0111i qua. \u0110\u00e2y l\u00e0 ti\u00eau chu\u1ea9n cho h\u1ea7u h\u1ebft c\u00e1c t\u01b0\u1eddng l\u1eeda hi\u1ec7n \u0111\u1ea1i.<\/p>\n<figure id=\"attachment_10777\" aria-describedby=\"caption-attachment-10777\" style=\"width: 578px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10777 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateful-firewall-khong-chi-kiem-tra-tung-goi-tin-ma-con-theo-doi-va-duy-tri-trang-thai-cua-cac-ket-noi-mang.png\" alt=\"Stateful Firewall kh\u00f4ng ch\u1ec9 ki\u1ec3m tra t\u1eebng g\u00f3i tin m\u00e0 c\u00f2n theo d\u00f5i v\u00e0 duy tr\u00ec tr\u1ea1ng th\u00e1i c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i m\u1ea1ng\" width=\"578\" height=\"431\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateful-firewall-khong-chi-kiem-tra-tung-goi-tin-ma-con-theo-doi-va-duy-tri-trang-thai-cua-cac-ket-noi-mang.png 578w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateful-firewall-khong-chi-kiem-tra-tung-goi-tin-ma-con-theo-doi-va-duy-tri-trang-thai-cua-cac-ket-noi-mang-300x224.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/stateful-firewall-khong-chi-kiem-tra-tung-goi-tin-ma-con-theo-doi-va-duy-tri-trang-thai-cua-cac-ket-noi-mang-150x112.png 150w\" sizes=\"auto, (max-width: 578px) 100vw, 578px\" \/><figcaption id=\"caption-attachment-10777\" class=\"wp-caption-text\">Stateful Firewall kh\u00f4ng ch\u1ec9 ki\u1ec3m tra t\u1eebng g\u00f3i tin m\u00e0 c\u00f2n theo d\u00f5i v\u00e0 duy tr\u00ec tr\u1ea1ng th\u00e1i c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i m\u1ea1ng<\/figcaption><\/figure>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"323_Proxy_Firewall_Tuong_lua_Proxy\"><\/span>3.2.3. Proxy Firewall (T\u01b0\u1eddng l\u1eeda Proxy)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">Lo\u1ea1i t\u01b0\u1eddng l\u1eeda n\u00e0y ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t <strong>ng\u01b0\u1eddi trung gian<\/strong> \u1edf t\u1ea7ng \u1ee9ng d\u1ee5ng. Thay v\u00ec cho ph\u00e9p k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp, m\u1ecdi y\u00eau c\u1ea7u t\u1eeb m\u1ea1ng n\u1ed9i b\u1ed9 ra Internet (v\u00e0 ng\u01b0\u1ee3c l\u1ea1i) \u0111\u1ec1u ph\u1ea3i \u0111i qua Proxy. Proxy Firewall gi\u00fap che gi\u1ea5u c\u1ea5u tr\u00fac v\u00e0 \u0111\u1ecba ch\u1ec9 IP th\u1eadt c\u1ee7a m\u1ea1ng n\u1ed9i b\u1ed9 v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ki\u1ec3m tra s\u00e2u h\u01a1n n\u1ed9i dung c\u1ee7a d\u1eef li\u1ec7u.<\/p>\n<figure id=\"attachment_10775\" aria-describedby=\"caption-attachment-10775\" style=\"width: 855px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10775 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-nhu-mot-nguoi-trung-gian-o-tang-ung-dung.png\" alt=\"Proxy Firewall ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t ng\u01b0\u1eddi trung gian \u1edf t\u1ea7ng \u1ee9ng d\u1ee5ng\" width=\"855\" height=\"571\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-nhu-mot-nguoi-trung-gian-o-tang-ung-dung.png 855w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-nhu-mot-nguoi-trung-gian-o-tang-ung-dung-300x200.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-nhu-mot-nguoi-trung-gian-o-tang-ung-dung-768x513.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-nhu-mot-nguoi-trung-gian-o-tang-ung-dung-150x100.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/proxy-firewall-hoat-dong-nhu-mot-nguoi-trung-gian-o-tang-ung-dung-696x465.png 696w\" sizes=\"auto, (max-width: 855px) 100vw, 855px\" \/><figcaption id=\"caption-attachment-10775\" class=\"wp-caption-text\">Proxy Firewall ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t ng\u01b0\u1eddi trung gian \u1edf t\u1ea7ng \u1ee9ng d\u1ee5ng<\/figcaption><\/figure>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"324_Next-Generation_Firewall_NGFW_-_Tuong_lua_the_he_moi\"><\/span>3.2.4. Next-Generation Firewall (NGFW &#8211; T\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u1eddng l\u1eeda ti\u00ean ti\u1ebfn v\u00e0 to\u00e0n di\u1ec7n nh\u1ea5t hi\u1ec7n nay, k\u1ebft h\u1ee3p c\u00e1c t\u00ednh n\u0103ng c\u1ee7a t\u01b0\u1eddng l\u1eeda tr\u1ea1ng th\u00e1i v\u1edbi nhi\u1ec1u l\u1edbp b\u1ea3o m\u1eadt th\u00f4ng minh kh\u00e1c, bao g\u1ed3m:<\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Ki\u1ec3m tra s\u00e2u g\u00f3i tin (Deep Packet Inspection &#8211; DPI):<\/strong> &#8220;\u0110\u1ecdc&#8221; c\u1ea3 n\u1ed9i dung b\u00ean trong g\u00f3i tin \u0111\u1ec3 ph\u00e1t hi\u1ec7n m\u00e3 \u0111\u1ed9c v\u00e0 c\u00e1c m\u1ed1i \u0111e d\u1ecda tinh vi.<\/li>\n<li style=\"text-align: justify;\"><strong>Nh\u1eadn bi\u1ebft \u1ee9ng d\u1ee5ng (Application Awareness):<\/strong> C\u00f3 kh\u1ea3 n\u0103ng nh\u1eadn di\u1ec7n v\u00e0 ki\u1ec3m so\u00e1t c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 (Facebook, YouTube, Zalo&#8230;) thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o c\u1ed5ng.<\/li>\n<li style=\"text-align: justify;\"><strong>T\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp (IPS):<\/strong> Ch\u1ee7 \u0111\u1ed9ng ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c h\u00e0nh vi t\u1ea5n c\u00f4ng \u0111\u00e3 bi\u1ebft.<\/li>\n<\/ul>\n<figure id=\"attachment_10773\" aria-describedby=\"caption-attachment-10773\" style=\"width: 1600px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10773 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/next-generation-firewall-la-cong-nghe-tuong-lua-tien-tien-va-toan-dien-nhat-hien-nay.png\" alt=\"Next-Generation Firewall l\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u1eddng l\u1eeda ti\u00ean ti\u1ebfn v\u00e0 to\u00e0n di\u1ec7n nh\u1ea5t hi\u1ec7n nay\" width=\"1600\" height=\"900\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/next-generation-firewall-la-cong-nghe-tuong-lua-tien-tien-va-toan-dien-nhat-hien-nay.png 1600w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/next-generation-firewall-la-cong-nghe-tuong-lua-tien-tien-va-toan-dien-nhat-hien-nay-300x169.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/next-generation-firewall-la-cong-nghe-tuong-lua-tien-tien-va-toan-dien-nhat-hien-nay-1024x576.png 1024w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/next-generation-firewall-la-cong-nghe-tuong-lua-tien-tien-va-toan-dien-nhat-hien-nay-768x432.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/next-generation-firewall-la-cong-nghe-tuong-lua-tien-tien-va-toan-dien-nhat-hien-nay-1536x864.png 1536w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/next-generation-firewall-la-cong-nghe-tuong-lua-tien-tien-va-toan-dien-nhat-hien-nay-150x84.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/next-generation-firewall-la-cong-nghe-tuong-lua-tien-tien-va-toan-dien-nhat-hien-nay-696x392.png 696w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/next-generation-firewall-la-cong-nghe-tuong-lua-tien-tien-va-toan-dien-nhat-hien-nay-1068x601.png 1068w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><figcaption id=\"caption-attachment-10773\" class=\"wp-caption-text\">Next-Generation Firewall l\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u1eddng l\u1eeda ti\u00ean ti\u1ebfn v\u00e0 to\u00e0n di\u1ec7n nh\u1ea5t hi\u1ec7n nay<\/figcaption><\/figure>\n<h4 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"325_Web_Application_Firewall_WAF_-_Tuong_lua_ung_dung_web\"><\/span>3.2.5. Web Application Firewall (WAF &#8211; T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 m\u1ed9t lo\u1ea1i firewall <strong>chuy\u00ean d\u1ee5ng<\/strong>, kh\u00f4ng d\u00f9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 m\u1ea1ng n\u00f3i chung m\u00e0 \u0111\u1ec3 <strong>b\u1ea3o v\u1ec7 c\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 website c\u1ee5 th\u1ec3<\/strong>. Web Application Firewall ho\u1ea1t \u0111\u1ed9ng \u1edf T\u1ea7ng 7 (l\u1edbp \u1ee9ng d\u1ee5ng) v\u00e0 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng \u0111\u1eb7c th\u00f9 nh\u1eafm v\u00e0o website nh\u01b0 <strong>SQL Injection, Cross-Site Scripting (XSS)&#8230;<\/strong>, nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng m\u00e0 m\u1ed9t NGFW th\u00f4ng th\u01b0\u1eddng c\u00f3 th\u1ec3 b\u1ecf s\u00f3t.<\/p>\n<figure id=\"attachment_10781\" aria-describedby=\"caption-attachment-10781\" style=\"width: 1459px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10781 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/web-application-firewall-la-mot-loai-firewall-chuyen-dung-khong-dung-de-bao-ve-mang-noi-chung-ma-de-bao-ve-cac-ung-dung-va-website-cu-the.png\" alt=\"Web Application Firewall l\u00e0 m\u1ed9t lo\u1ea1i firewall chuy\u00ean d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 website c\u1ee5 th\u1ec3\" width=\"1459\" height=\"660\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/web-application-firewall-la-mot-loai-firewall-chuyen-dung-khong-dung-de-bao-ve-mang-noi-chung-ma-de-bao-ve-cac-ung-dung-va-website-cu-the.png 1459w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/web-application-firewall-la-mot-loai-firewall-chuyen-dung-khong-dung-de-bao-ve-mang-noi-chung-ma-de-bao-ve-cac-ung-dung-va-website-cu-the-300x136.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/web-application-firewall-la-mot-loai-firewall-chuyen-dung-khong-dung-de-bao-ve-mang-noi-chung-ma-de-bao-ve-cac-ung-dung-va-website-cu-the-1024x463.png 1024w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/web-application-firewall-la-mot-loai-firewall-chuyen-dung-khong-dung-de-bao-ve-mang-noi-chung-ma-de-bao-ve-cac-ung-dung-va-website-cu-the-768x347.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/web-application-firewall-la-mot-loai-firewall-chuyen-dung-khong-dung-de-bao-ve-mang-noi-chung-ma-de-bao-ve-cac-ung-dung-va-website-cu-the-150x68.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/web-application-firewall-la-mot-loai-firewall-chuyen-dung-khong-dung-de-bao-ve-mang-noi-chung-ma-de-bao-ve-cac-ung-dung-va-website-cu-the-696x315.png 696w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/web-application-firewall-la-mot-loai-firewall-chuyen-dung-khong-dung-de-bao-ve-mang-noi-chung-ma-de-bao-ve-cac-ung-dung-va-website-cu-the-1068x483.png 1068w\" sizes=\"auto, (max-width: 1459px) 100vw, 1459px\" \/><figcaption id=\"caption-attachment-10781\" class=\"wp-caption-text\">Web Application Firewall l\u00e0 m\u1ed9t lo\u1ea1i firewall chuy\u00ean d\u1ee5ng, kh\u00f4ng d\u00f9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 m\u1ea1ng n\u00f3i chung m\u00e0 \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 website c\u1ee5 th\u1ec3<\/figcaption><\/figure>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"4_Tai_sao_Firewall_lai_quan_trong_den_vay_4_Loi_ich_cot_loi\"><\/span>4. T\u1ea1i sao Firewall l\u1ea1i quan tr\u1ecdng \u0111\u1ebfn v\u1eady? 4 L\u1ee3i \u00edch c\u1ed1t l\u00f5i<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">T\u1ea7m quan tr\u1ecdng c\u1ee7a Firewall \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n qua b\u1ed1n l\u1ee3i \u00edch c\u1ed1t l\u00f5i sau:<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"41_Ngan_chan_truy_cap_trai_phep\"><\/span>4.1. Ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 ch\u1ee9c n\u0103ng c\u01a1 b\u1ea3n v\u00e0 quan tr\u1ecdng nh\u1ea5t, bi\u1ebfn Firewall th\u00e0nh <strong>&#8220;ng\u01b0\u1eddi l\u00ednh g\u00e1c c\u1ed5ng k\u1ef9 thu\u1eadt s\u1ed1&#8221;<\/strong> cho m\u1ea1ng c\u1ee7a b\u1ea1n.<\/p>\n<p style=\"text-align: justify;\"><strong>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng:<\/strong> Firewall ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd c\u00e1c &#8220;c\u00e1nh c\u1eeda&#8221; ra v\u00e0o m\u1ea1ng c\u1ee7a b\u1ea1n, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c c\u1ed5ng (port). M\u1ed7i d\u1ecbch v\u1ee5 tr\u00ean Internet (web, email, remote desktop&#8230;) \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng tr\u00ean m\u1ed9t c\u1ed5ng c\u1ee5 th\u1ec3. Firewall s\u1ebd \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1ec3 ch\u1ec9 m\u1edf nh\u1eefng c\u1ed5ng th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft cho ho\u1ea1t \u0111\u1ed9ng kinh doanh v\u00e0 \u0111\u00f3ng t\u1ea5t c\u1ea3 c\u00e1c c\u1ed5ng c\u00f2n l\u1ea1i.<\/p>\n<p style=\"text-align: justify;\"><strong>T\u00e1c \u0111\u1ed9ng th\u1ef1c t\u1ebf:<\/strong> \u0110i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n tin t\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh vi d\u00f2 qu\u00e9t c\u1ed5ng (port scanning) \u0111\u1ec3 t\u00ecm ki\u1ebfm l\u1ed7 h\u1ed5ng. Firewall c\u0169ng ch\u1eb7n \u0111\u1ee9ng c\u00e1c n\u1ed7 l\u1ef1c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u00e0 tr\u00e1i ph\u00e9p t\u1eeb Internet v\u00e0o c\u00e1c h\u1ec7 th\u1ed1ng nh\u1ea1y c\u1ea3m b\u00ean trong nh\u01b0 m\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u, m\u00e1y ch\u1ee7 n\u1ed9i b\u1ed9 hay c\u00e1c m\u00e1y t\u00ednh c\u00e1 nh\u00e2n, b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u quan tr\u1ecdng kh\u1ecfi nguy c\u01a1 b\u1ecb \u0111\u00e1nh c\u1eafp ho\u1eb7c ph\u00e1 ho\u1ea1i.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"42_Bao_ve_khoi_Malware_va_cac_cuoc_tan_cong_tinh_vi\"><\/span>4.2. B\u1ea3o v\u1ec7 kh\u1ecfi Malware v\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tinh vi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">V\u1edbi s\u1ef1 ra \u0111\u1eddi c\u1ee7a T\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi (NGFW), kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 \u0111\u00e3 \u0111\u01b0\u1ee3c n\u00e2ng l\u00ean m\u1ed9t t\u1ea7m cao m\u1edbi, kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf vi\u1ec7c ki\u1ec3m so\u00e1t c\u1ed5ng v\u00e0 IP.<\/p>\n<p style=\"text-align: justify;\"><strong>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Ki\u1ec3m tra s\u00e2u g\u00f3i tin (DPI):<\/strong> NGFW c\u00f3 kh\u1ea3 n\u0103ng &#8220;\u0111\u1ecdc&#8221; n\u1ed9i dung b\u00ean trong c\u00e1c g\u00f3i d\u1eef li\u1ec7u \u0111ang di chuy\u1ec3n qua m\u1ea1ng. Nh\u1edd \u0111\u00f3, n\u00f3 c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 ch\u1eb7n c\u00e1c t\u1ec7p ch\u1ee9a virus, m\u00e3 \u0111\u1ed9c t\u1ed1ng ti\u1ec1n (ransomware), trojan&#8230; ngay c\u1ea3 khi ch\u00fang \u0111ang c\u1ed1 g\u1eafng x\u00e2m nh\u1eadp qua m\u1ed9t c\u1ed5ng \u0111\u01b0\u1ee3c cho ph\u00e9p (nh\u01b0 c\u1ed5ng web).<\/li>\n<li style=\"text-align: justify;\"><strong>H\u1ec7 th\u1ed1ng ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp (IPS):<\/strong> T\u00ednh n\u0103ng n\u00e0y li\u00ean t\u1ee5c ph\u00e2n t\u00edch l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng \u0111\u1ec3 t\u00ecm ki\u1ebfm c\u00e1c &#8220;d\u1ea5u hi\u1ec7u&#8221; (signatures) ho\u1eb7c c\u00e1c h\u00e0nh vi b\u1ea5t th\u01b0\u1eddng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng \u0111\u00e3 bi\u1ebft. Khi ph\u00e1t hi\u1ec7n m\u1ed9t m\u1eabu t\u1ea5n c\u00f4ng, IPS c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng ch\u1eb7n ngay l\u1eadp t\u1ee9c, v\u00f4 hi\u1ec7u h\u00f3a m\u1ed1i \u0111e d\u1ecda tr\u01b0\u1edbc khi n\u00f3 k\u1ecbp g\u00e2y h\u1ea1i.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>T\u00e1c \u0111\u1ed9ng th\u1ef1c t\u1ebf:<\/strong> Firewall ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t l\u1edbp l\u1ecdc s\u1ea1ch m\u00e3 \u0111\u1ed9c ngay t\u1ea1i c\u1eeda ng\u00f5, gi\u00fap gi\u1ea3m thi\u1ec3u \u0111\u00e1ng k\u1ec3 nguy c\u01a1 l\u00e2y nhi\u1ec5m cho c\u00e1c m\u00e1y t\u00ednh trong m\u1ea1ng v\u00e0 gi\u1ea3m t\u1ea3i cho c\u00e1c ph\u1ea7n m\u1ec1m di\u1ec7t virus tr\u00ean t\u1eebng thi\u1ebft b\u1ecb.<\/p>\n<figure id=\"attachment_10779\" aria-describedby=\"caption-attachment-10779\" style=\"width: 1540px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10779 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/tuong-lua-giup-ngan-chan-truy-cap-trai-phep-bao-ve-khoi-malware-va-cac-cuoc-tan-cong-tinh-vi.png\" alt=\"T\u01b0\u1eddng l\u1eeda gi\u00fap ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p, b\u1ea3o v\u1ec7 kh\u1ecfi Malware v\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tinh vi\" width=\"1540\" height=\"833\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/tuong-lua-giup-ngan-chan-truy-cap-trai-phep-bao-ve-khoi-malware-va-cac-cuoc-tan-cong-tinh-vi.png 1540w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/tuong-lua-giup-ngan-chan-truy-cap-trai-phep-bao-ve-khoi-malware-va-cac-cuoc-tan-cong-tinh-vi-300x162.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/tuong-lua-giup-ngan-chan-truy-cap-trai-phep-bao-ve-khoi-malware-va-cac-cuoc-tan-cong-tinh-vi-1024x554.png 1024w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/tuong-lua-giup-ngan-chan-truy-cap-trai-phep-bao-ve-khoi-malware-va-cac-cuoc-tan-cong-tinh-vi-768x415.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/tuong-lua-giup-ngan-chan-truy-cap-trai-phep-bao-ve-khoi-malware-va-cac-cuoc-tan-cong-tinh-vi-1536x831.png 1536w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/tuong-lua-giup-ngan-chan-truy-cap-trai-phep-bao-ve-khoi-malware-va-cac-cuoc-tan-cong-tinh-vi-150x81.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/tuong-lua-giup-ngan-chan-truy-cap-trai-phep-bao-ve-khoi-malware-va-cac-cuoc-tan-cong-tinh-vi-696x376.png 696w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/tuong-lua-giup-ngan-chan-truy-cap-trai-phep-bao-ve-khoi-malware-va-cac-cuoc-tan-cong-tinh-vi-1068x578.png 1068w\" sizes=\"auto, (max-width: 1540px) 100vw, 1540px\" \/><figcaption id=\"caption-attachment-10779\" class=\"wp-caption-text\">T\u01b0\u1eddng l\u1eeda gi\u00fap ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p, b\u1ea3o v\u1ec7 kh\u1ecfi Malware v\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tinh vi<\/figcaption><\/figure>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"43_Kiem_soat_chinh_sach_va_Toi_uu_hoa_viec_su_dung_mang\"><\/span>4.3. Ki\u1ec3m so\u00e1t ch\u00ednh s\u00e1ch v\u00e0 T\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng m\u1ea1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Firewall cung c\u1ea5p cho doanh nghi\u1ec7p quy\u1ec1n n\u0103ng ki\u1ec3m so\u00e1t c\u00e1ch m\u00e0 t\u00e0i nguy\u00ean Internet \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong t\u1ed5 ch\u1ee9c c\u1ee7a m\u00ecnh.<\/p>\n<p style=\"text-align: justify;\"><strong>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng:<\/strong> D\u1ef1a v\u00e0o t\u00ednh n\u0103ng nh\u1eadn bi\u1ebft \u1ee9ng d\u1ee5ng (Application Awareness), qu\u1ea3n tr\u1ecb vi\u00ean c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c ch\u00ednh s\u00e1ch chi ti\u1ebft, kh\u00f4ng ch\u1ec9 d\u1ef1a tr\u00ean c\u1ed5ng m\u00e0 d\u1ef1a tr\u00ean \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n<p style=\"text-align: justify;\"><strong>T\u00e1c \u0111\u1ed9ng th\u1ef1c t\u1ebf:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>T\u0103ng n\u0103ng su\u1ea5t:<\/strong> Ch\u1eb7n truy c\u1eadp v\u00e0o c\u00e1c trang m\u1ea1ng x\u00e3 h\u1ed9i, trang xem phim, game online&#8230; trong gi\u1edd l\u00e0m vi\u1ec7c \u0111\u1ec3 nh\u00e2n vi\u00ean t\u1eadp trung h\u01a1n.<\/li>\n<li style=\"text-align: justify;\"><strong>B\u1ea3o v\u1ec7 an ninh:<\/strong> Ch\u1eb7n c\u00e1c \u1ee9ng d\u1ee5ng chia s\u1ebb file ngang h\u00e0ng (torrents) ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa kh\u00f4ng an to\u00e0n c\u00f3 th\u1ec3 t\u1ea1o ra l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt.<\/li>\n<li style=\"text-align: justify;\"><strong>T\u1ed1i \u01b0u b\u0103ng th\u00f4ng:<\/strong> \u01afu ti\u00ean b\u0103ng th\u00f4ng cho c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng cho kinh doanh (h\u1ecdp tr\u1ef1c tuy\u1ebfn, h\u1ec7 th\u1ed1ng ERP) v\u00e0 gi\u1edbi h\u1ea1n b\u0103ng th\u00f4ng cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng gi\u1ea3i tr\u00ed, \u0111\u1ea3m b\u1ea3o m\u1ea1ng lu\u00f4n ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"44_Giam_sat_Ghi_nhat_ky_va_Ho_tro_dieu_tra_Forensics\"><\/span>4.4. Gi\u00e1m s\u00e1t, Ghi nh\u1eadt k\u00fd v\u00e0 H\u1ed7 tr\u1ee3 \u0111i\u1ec1u tra (Forensics)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Firewall ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t <strong>&#8220;h\u1ed9p \u0111en&#8221; hay &#8220;camera an ninh&#8221;<\/strong> c\u1ee7a h\u1ec7 th\u1ed1ng m\u1ea1ng, ghi l\u1ea1i m\u1ecdi ho\u1ea1t \u0111\u1ed9ng di\u1ec5n ra.<\/p>\n<p style=\"text-align: justify;\"><strong>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng:<\/strong> T\u1ea5t c\u1ea3 c\u00e1c k\u1ebft n\u1ed1i, d\u00f9 \u0111\u01b0\u1ee3c cho ph\u00e9p hay b\u1ecb t\u1eeb ch\u1ed1i, \u0111\u1ec1u \u0111\u01b0\u1ee3c ghi l\u1ea1i chi ti\u1ebft trong m\u1ed9t t\u1ec7p nh\u1eadt k\u00fd (log).<\/p>\n<p style=\"text-align: justify;\"><strong>T\u00e1c \u0111\u1ed9ng th\u1ef1c t\u1ebf:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Ph\u00e1t hi\u1ec7n m\u1ed1i \u0111e d\u1ecda:<\/strong> Qu\u1ea3n tr\u1ecb vi\u00ean c\u00f3 th\u1ec3 ph\u00e2n t\u00edch log \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c h\u00e0nh vi b\u1ea5t th\u01b0\u1eddng, v\u00ed d\u1ee5 nh\u01b0 m\u1ed9t \u0111\u1ecba ch\u1ec9 IP l\u1ea1 li\u00ean t\u1ee5c c\u1ed1 g\u1eafng k\u1ebft n\u1ed1i \u0111\u1ebfn m\u1ed9t m\u00e1y ch\u1ee7, \u0111\u00e2y c\u00f3 th\u1ec3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng c\u00f3 ch\u1ee7 \u0111\u00edch.<\/li>\n<li style=\"text-align: justify;\"><strong>\u0110i\u1ec1u tra s\u1ef1 c\u1ed1:<\/strong> Trong tr\u01b0\u1eddng h\u1ee3p m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng x\u1ea3y ra, c\u00e1c b\u1ea3n ghi c\u1ee7a firewall l\u00e0 b\u1eb1ng ch\u1ee9ng v\u00f4 gi\u00e1, gi\u00fap c\u00e1c chuy\u00ean gia an ninh m\u1ea1ng truy v\u1ebft l\u1ea1i ngu\u1ed3n g\u1ed1c, ph\u01b0\u01a1ng th\u1ee9c v\u00e0 m\u1ee9c \u0111\u1ed9 thi\u1ec7t h\u1ea1i c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng.<\/li>\n<li style=\"text-align: justify;\"><strong>Tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh (Compliance):<\/strong> Nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p (nh\u01b0 t\u00e0i ch\u00ednh, y t\u1ebf) c\u00f3 c\u00e1c quy \u0111\u1ecbnh ph\u00e1p l\u00fd b\u1eaft bu\u1ed9c doanh nghi\u1ec7p ph\u1ea3i l\u01b0u tr\u1eef nh\u1eadt k\u00fd truy c\u1eadp m\u1ea1ng \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho m\u1ee5c \u0111\u00edch ki\u1ec3m to\u00e1n. Firewall gi\u00fap \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u n\u00e0y m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng.<\/li>\n<\/ul>\n<figure id=\"attachment_10766\" aria-describedby=\"caption-attachment-10766\" style=\"width: 1920px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10766 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-cung-cap-cho-doanh-nghiep-quyen-nang-kiem-soat-cach-ma-tai-nguyen-internet-duoc-su-dung-trong-to-chuc-cua-minh.png\" alt=\"Firewall c\u1ea5p cho doanh nghi\u1ec7p quy\u1ec1n ki\u1ec3m so\u00e1t c\u00e1ch m\u00e0 t\u00e0i nguy\u00ean Internet \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong t\u1ed5 ch\u1ee9c\" width=\"1920\" height=\"1080\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-cung-cap-cho-doanh-nghiep-quyen-nang-kiem-soat-cach-ma-tai-nguyen-internet-duoc-su-dung-trong-to-chuc-cua-minh.png 1920w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-cung-cap-cho-doanh-nghiep-quyen-nang-kiem-soat-cach-ma-tai-nguyen-internet-duoc-su-dung-trong-to-chuc-cua-minh-300x169.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-cung-cap-cho-doanh-nghiep-quyen-nang-kiem-soat-cach-ma-tai-nguyen-internet-duoc-su-dung-trong-to-chuc-cua-minh-1024x576.png 1024w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-cung-cap-cho-doanh-nghiep-quyen-nang-kiem-soat-cach-ma-tai-nguyen-internet-duoc-su-dung-trong-to-chuc-cua-minh-768x432.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-cung-cap-cho-doanh-nghiep-quyen-nang-kiem-soat-cach-ma-tai-nguyen-internet-duoc-su-dung-trong-to-chuc-cua-minh-1536x864.png 1536w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-cung-cap-cho-doanh-nghiep-quyen-nang-kiem-soat-cach-ma-tai-nguyen-internet-duoc-su-dung-trong-to-chuc-cua-minh-150x84.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-cung-cap-cho-doanh-nghiep-quyen-nang-kiem-soat-cach-ma-tai-nguyen-internet-duoc-su-dung-trong-to-chuc-cua-minh-696x392.png 696w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-cung-cap-cho-doanh-nghiep-quyen-nang-kiem-soat-cach-ma-tai-nguyen-internet-duoc-su-dung-trong-to-chuc-cua-minh-1068x601.png 1068w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><figcaption id=\"caption-attachment-10766\" class=\"wp-caption-text\">Firewall cung c\u1ea5p cho doanh nghi\u1ec7p quy\u1ec1n n\u0103ng ki\u1ec3m so\u00e1t c\u00e1ch m\u00e0 t\u00e0i nguy\u00ean Internet \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong t\u1ed5 ch\u1ee9c c\u1ee7a m\u00ecnh<\/figcaption><\/figure>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"5_Han_che_cua_Firewall_Nhung_gi_Firewall_khong_the_lam\"><\/span>5. H\u1ea1n ch\u1ebf c\u1ee7a Firewall: Nh\u1eefng g\u00ec Firewall kh\u00f4ng th\u1ec3 l\u00e0m<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">M\u1eb7c d\u00f9 l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 b\u1ea3o m\u1eadt n\u1ec1n t\u1ea3ng v\u00e0 c\u1ef1c k\u1ef3 m\u1ea1nh m\u1ebd, Firewall kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t vi\u00ean \u0111\u1ea1n b\u1ea1c c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft m\u1ecdi v\u1ea5n \u0111\u1ec1 an ninh m\u1ea1ng. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u r\u00f5 nh\u1eefng gi\u1edbi h\u1ea1n c\u1ee7a n\u00f3 \u0111\u1ec3 kh\u00f4ng c\u00f3 c\u1ea3m gi\u00e1c an to\u00e0n gi\u1ea3 t\u1ea1o v\u00e0 bi\u1ebft c\u00e1ch b\u1ed5 sung c\u00e1c l\u1edbp b\u1ea3o v\u1ec7 kh\u00e1c.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"51_Khong_the_chong_lai_cac_cuoc_tan_cong_khong_di_qua_no\"><\/span>5.1. Kh\u00f4ng th\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4ng \u0111i qua n\u00f3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Firewall ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t ng\u01b0\u1eddi l\u00ednh g\u00e1c \u1edf chu vi m\u1ea1ng (network perimeter). T\u01b0\u1eddng l\u1eeda ch\u1ec9 c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111i qua n\u00f3. B\u1ea5t k\u1ef3 m\u1ed1i \u0111e d\u1ecda n\u00e0o kh\u00f4ng \u0111i qua &#8220;c\u1ed5ng ch\u00ednh&#8221; n\u00e0y \u0111\u1ec1u s\u1ebd qua m\u1eb7t \u0111\u01b0\u1ee3c Firewall.<\/p>\n<p style=\"text-align: justify;\"><strong>T\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Thi\u1ebft b\u1ecb ngo\u1ea1i vi b\u1ecb nhi\u1ec5m \u0111\u1ed9c:<\/strong> M\u1ed9t nh\u00e2n vi\u00ean v\u00f4 t\u00ecnh c\u1eafm m\u1ed9t chi\u1ebfc USB ch\u1ee9a virus v\u00e0o m\u00e1y t\u00ednh trong m\u1ea1ng c\u00f4ng ty. M\u00e3 \u0111\u1ed9c s\u1ebd l\u00e2y lan tr\u1ef1c ti\u1ebfp v\u00e0o m\u00e1y t\u00ednh \u0111\u00f3 v\u00e0 c\u00f3 th\u1ec3 lan sang c\u00e1c m\u00e1y kh\u00e1c trong c\u00f9ng m\u1ea1ng n\u1ed9i b\u1ed9 m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i \u0111i qua Firewall.<\/li>\n<li style=\"text-align: justify;\"><strong>Email \u0111\u1ed9c h\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea3i v\u1ec1:<\/strong> M\u1ed9t email l\u1eeba \u0111\u1ea3o (phishing) c\u00f3 th\u1ec3 \u0111\u00e3 v\u01b0\u1ee3t qua c\u00e1c b\u1ed9 l\u1ecdc ban \u0111\u1ea7u. Khi nh\u00e2n vi\u00ean m\u1edf t\u1ec7p \u0111\u00ednh k\u00e8m \u0111\u1ed9c h\u1ea1i, m\u00e3 \u0111\u1ed9c s\u1ebd \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t ngay tr\u00ean m\u00e1y t\u00ednh c\u1ee7a h\u1ecd.<\/li>\n<li style=\"text-align: justify;\"><strong>K\u1ebft n\u1ed1i kh\u00f4ng an to\u00e0n:<\/strong> M\u1ed9t nh\u00e2n vi\u00ean k\u1ebft n\u1ed1i laptop c\u00e1 nh\u00e2n (\u0111\u00e3 b\u1ecb nhi\u1ec5m virus) v\u00e0o m\u1ea1ng Wi-Fi c\u1ee7a c\u00f4ng ty.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>Gi\u1ea3i ph\u00e1p b\u1ed5 sung:<\/strong> \u0110\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c m\u1ed1i \u0111e d\u1ecda n\u00e0y, c\u1ea7n c\u00f3 c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o m\u1eadt \u0111i\u1ec3m cu\u1ed1i (Endpoint Security) nh\u01b0 ph\u1ea7n m\u1ec1m di\u1ec7t virus (Antivirus), EDR (Endpoint Detection and Response), v\u00e0 quan tr\u1ecdng nh\u1ea5t l\u00e0 c\u00e1c ch\u00ednh s\u00e1ch an ninh v\u00e0 \u0111\u00e0o t\u1ea1o nh\u1eadn th\u1ee9c cho ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"52_Khong_the_ngan_chan_cac_moi_de_doa_tu_ben_trong_Internal_Threats\"><\/span>5.2. Kh\u00f4ng th\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c m\u1ed1i \u0111e d\u1ecda t\u1eeb b\u00ean trong (Internal Threats)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Firewall \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ch\u1ee7 y\u1ebfu \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c m\u1ed1i \u0111e d\u1ecda t\u1eeb b\u00ean ngo\u00e0i (m\u1ea1ng kh\u00f4ng tin c\u1eady). M\u1eb7c \u0111\u1ecbnh, t\u01b0\u1eddng l\u1eeda th\u01b0\u1eddng tin t\u01b0\u1edfng v\u00e0o l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp b\u1eaft ngu\u1ed3n t\u1eeb b\u00ean trong m\u1ea1ng. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra m\u1ed9t \u0111i\u1ec3m m\u00f9 l\u1edbn \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ed1i \u0111e d\u1ecda n\u1ed9i b\u1ed9.<\/p>\n<p style=\"text-align: justify;\"><strong>T\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Nh\u00e2n vi\u00ean c\u00f3 \u00fd \u0111\u1ed3 x\u1ea5u (Malicious Insider):<\/strong> M\u1ed9t nh\u00e2n vi\u00ean c\u00f3 quy\u1ec1n truy c\u1eadp h\u1ee3p l\u1ec7 c\u1ed1 t\u00ecnh sao ch\u00e9p d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m c\u1ee7a c\u00f4ng ty v\u00e0 g\u1eedi ra ngo\u00e0i qua email ho\u1eb7c t\u1ea3i l\u00ean m\u1ed9t d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y. V\u00ec \u0111\u00e2y l\u00e0 m\u1ed9t k\u1ebft n\u1ed1i \u0111i ra h\u1ee3p l\u1ec7 (outbound traffic) qua c\u00e1c c\u1ed5ng ph\u1ed5 bi\u1ebfn (nh\u01b0 c\u1ed5ng 443 cho HTTPS), Firewall th\u00f4ng th\u01b0\u1eddng s\u1ebd cho ph\u00e9p n\u00f3 \u0111i qua.<\/li>\n<li style=\"text-align: justify;\"><strong>T\u00e0i kho\u1ea3n b\u1ecb x\u00e2m ph\u1ea1m (Compromised Insider):<\/strong> Tin t\u1eb7c \u0111\u00e1nh c\u1eafp \u0111\u01b0\u1ee3c th\u00f4ng tin \u0111\u0103ng nh\u1eadp c\u1ee7a m\u1ed9t nh\u00e2n vi\u00ean th\u00f4ng qua l\u1eeba \u0111\u1ea3o. Sau \u0111\u00f3, ch\u00fang s\u1eed d\u1ee5ng t\u00e0i kho\u1ea3n n\u00e0y \u0111\u1ec3 \u0111\u0103ng nh\u1eadp v\u00e0o h\u1ec7 th\u1ed1ng. \u0110\u1ed1i v\u1edbi Firewall, \u0111\u00e2y l\u00e0 m\u1ed9t ng\u01b0\u1eddi d\u00f9ng ho\u00e0n to\u00e0n h\u1ee3p ph\u00e1p v\u00e0 m\u1ecdi h\u00e0nh \u0111\u1ed9ng c\u1ee7a h\u1ecd \u0111\u1ec1u \u0111\u01b0\u1ee3c tin t\u01b0\u1edfng.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>Gi\u1ea3i ph\u00e1p b\u1ed5 sung:<\/strong> C\u1ea7n c\u00f3 c\u00e1c m\u00f4 h\u00ecnh b\u1ea3o m\u1eadt ti\u00ean ti\u1ebfn h\u01a1n nh\u01b0 Zero Trust (kh\u00f4ng tin t\u01b0\u1edfng b\u1ea5t k\u1ef3 ai, lu\u00f4n x\u00e1c minh), h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd quy\u1ec1n truy c\u1eadp (Privileged Access Management &#8211; PAM), v\u00e0 c\u00e1c c\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t h\u00e0nh vi ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<figure id=\"attachment_10774\" aria-describedby=\"caption-attachment-10774\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10774 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/nguoi-dung-can-co-nhung-giai-phap-bo-sung-de-giam-thieu-han-che-cua-tuong-lua.png\" alt=\"Ng\u01b0\u1eddi d\u00f9ng c\u1ea7n c\u00f3 nh\u1eefng gi\u1ea3i ph\u00e1p b\u1ed5 sung \u0111\u1ec3 gi\u1ea3m thi\u1ec3u h\u1ea1n ch\u1ebf c\u1ee7a t\u01b0\u1eddng l\u1eeda\" width=\"600\" height=\"300\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/nguoi-dung-can-co-nhung-giai-phap-bo-sung-de-giam-thieu-han-che-cua-tuong-lua.png 600w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/nguoi-dung-can-co-nhung-giai-phap-bo-sung-de-giam-thieu-han-che-cua-tuong-lua-300x150.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/nguoi-dung-can-co-nhung-giai-phap-bo-sung-de-giam-thieu-han-che-cua-tuong-lua-150x75.png 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption id=\"caption-attachment-10774\" class=\"wp-caption-text\">Ng\u01b0\u1eddi d\u00f9ng c\u1ea7n c\u00f3 nh\u1eefng gi\u1ea3i ph\u00e1p b\u1ed5 sung \u0111\u1ec3 gi\u1ea3m thi\u1ec3u h\u1ea1n ch\u1ebf c\u1ee7a t\u01b0\u1eddng l\u1eeda<\/figcaption><\/figure>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"53_Co_the_bi_bo_qua_boi_cac_cuoc_tan_cong_chua_tung_duoc_biet_den_va_tan_cong_phi_ky_thuat\"><\/span>5.3. C\u00f3 th\u1ec3 b\u1ecb &#8220;b\u1ecf qua&#8221; b\u1edfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ch\u01b0a t\u1eebng \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u00e0 t\u1ea5n c\u00f4ng phi k\u1ef9 thu\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Firewall, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c lo\u1ea1i d\u1ef1a tr\u00ean ch\u1eef k\u00fd (signature-based), ch\u1ec9 m\u1ea1nh khi \u0111\u1ed1i m\u1eb7t v\u1edbi c\u00e1c m\u1ed1i \u0111e d\u1ecda \u0111\u00e3 bi\u1ebft.<\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>T\u1ea5n c\u00f4ng Zero-day:<\/strong> \u0110\u00e2y l\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khai th\u00e1c nh\u1eefng l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt ho\u00e0n to\u00e0n m\u1edbi, ch\u01b0a t\u1eebng \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 v\u00e0 do \u0111\u00f3 ch\u01b0a c\u00f3 &#8220;ch\u1eef k\u00fd&#8221; nh\u1eadn d\u1ea1ng. V\u00ec kh\u00f4ng c\u00f3 m\u1eabu n\u00e0o \u0111\u1ec3 so s\u00e1nh, Firewall c\u00f3 th\u1ec3 cho r\u1eb1ng \u0111\u00e2y l\u00e0 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp b\u00ecnh th\u01b0\u1eddng v\u00e0 cho ph\u00e9p n\u00f3 \u0111i qua.<\/li>\n<li style=\"text-align: justify;\"><strong>K\u1ef9 thu\u1eadt l\u1eeba \u0111\u1ea3o (Phishing):<\/strong> C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y kh\u00f4ng nh\u1eafm v\u00e0o h\u1ea1 t\u1ea7ng k\u1ef9 thu\u1eadt m\u00e0 nh\u1eafm v\u00e0o \u0111i\u1ec3m y\u1ebfu l\u1edbn nh\u1ea5t: con ng\u01b0\u1eddi. M\u1ed9t email l\u1eeba \u0111\u1ea3o \u0111\u01b0\u1ee3c so\u1ea1n th\u1ea3o tinh vi c\u00f3 th\u1ec3 l\u1eeba ng\u01b0\u1eddi d\u00f9ng nh\u1ea5p v\u00e0o m\u1ed9t \u0111\u01b0\u1eddng link v\u00e0 t\u1ef1 nguy\u1ec7n cung c\u1ea5p th\u00f4ng tin \u0111\u0103ng nh\u1eadp tr\u00ean m\u1ed9t trang web gi\u1ea3 m\u1ea1o. Firewall kh\u00f4ng th\u1ec3 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi d\u00f9ng kh\u1ecfi ch\u00ednh nh\u1eefng h\u00e0nh \u0111\u1ed9ng sai l\u1ea7m c\u1ee7a h\u1ecd.<\/li>\n<\/ul>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"54_Mot_cau_hinh_sai_co_the_tao_ra_cac_lo_hong_bao_mat_nghiem_trong\"><\/span>5.4. M\u1ed9t c\u1ea5u h\u00ecnh sai c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt nghi\u00eam tr\u1ecdng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Firewall ch\u1ec9 m\u1ea1nh v\u00e0 hi\u1ec7u qu\u1ea3 khi \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang. N\u00f3 l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd, nh\u01b0ng n\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng sai c\u00e1ch, n\u00f3 c\u00f3 th\u1ec3 tr\u1edf n\u00ean v\u00f4 d\u1ee5ng ho\u1eb7c th\u1eadm ch\u00ed ph\u1ea3n t\u00e1c d\u1ee5ng.<\/p>\n<p style=\"text-align: justify;\"><strong>T\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>Quy t\u1eafc &#8220;Allow Any\/Any&#8221;:<\/strong> \u0110\u00f4i khi, \u0111\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 t\u1ea1m th\u1eddi, qu\u1ea3n tr\u1ecb vi\u00ean c\u00f3 th\u1ec3 t\u1ea1o ra m\u1ed9t quy t\u1eafc cho ph\u00e9p m\u1ecdi lo\u1ea1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111i qua. N\u1ebfu quy t\u1eafc n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c g\u1ee1 b\u1ecf, n\u00f3 s\u1ebd m\u1edf toang c\u00e1nh c\u1eeda cho m\u1ecdi m\u1ed1i \u0111e d\u1ecda.<\/li>\n<li style=\"text-align: justify;\"><strong>Quy t\u1eafc l\u1ed7i th\u1eddi:<\/strong> C\u00e1c quy t\u1eafc \u0111\u01b0\u1ee3c t\u1ea1o ra cho c\u00e1c m\u00e1y ch\u1ee7 ho\u1eb7c d\u1ecbch v\u1ee5 c\u0169 kh\u00f4ng c\u00f2n s\u1eed d\u1ee5ng nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c x\u00f3a b\u1ecf, \u0111\u1ec3 l\u1ea1i c\u00e1c c\u1ed5ng m\u1edf kh\u00f4ng c\u1ea7n thi\u1ebft tr\u00ean m\u1ea1ng.<\/li>\n<li style=\"text-align: justify;\"><strong>Kh\u00f4ng c\u1eadp nh\u1eadt Firmware:<\/strong> Ph\u1ea7n m\u1ec1m c\u1ee7a ch\u00ednh thi\u1ebft b\u1ecb Firewall c\u0169ng c\u00f3 th\u1ec3 c\u00f3 l\u1ed7 h\u1ed5ng. N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt b\u1ea3n v\u00e1 th\u01b0\u1eddng xuy\u00ean, ch\u00ednh Firewall c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh m\u1ee5c ti\u00eau b\u1ecb t\u1ea5n c\u00f4ng.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><strong>Y\u00eau c\u1ea7u:<\/strong> Vi\u1ec7c qu\u1ea3n l\u00fd Firewall \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00f3 c\u00e1c chuy\u00ean gia am hi\u1ec3u, quy tr\u00ecnh ki\u1ec3m tra, r\u00e0 so\u00e1t quy t\u1eafc \u0111\u1ecbnh k\u1ef3 v\u00e0 ch\u00ednh s\u00e1ch qu\u1ea3n l\u00fd thay \u0111\u1ed5i ch\u1eb7t ch\u1ebd.<\/p>\n<figure id=\"attachment_10772\" aria-describedby=\"caption-attachment-10772\" style=\"width: 864px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10772 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/neu-khong-duoc-cap-nhat-firmware-thuong-xuyen-chinh-firewall-co-the-tro-thanh-muc-tieu-bi-tan-cong.png\" alt=\"Firewall c\u1ea7n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt Firmware th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 kh\u00f4ng tr\u1edf th\u00e0nh m\u1ee5c ti\u00eau t\u1ea5n c\u00f4ng\" width=\"864\" height=\"486\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/neu-khong-duoc-cap-nhat-firmware-thuong-xuyen-chinh-firewall-co-the-tro-thanh-muc-tieu-bi-tan-cong.png 864w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/neu-khong-duoc-cap-nhat-firmware-thuong-xuyen-chinh-firewall-co-the-tro-thanh-muc-tieu-bi-tan-cong-300x169.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/neu-khong-duoc-cap-nhat-firmware-thuong-xuyen-chinh-firewall-co-the-tro-thanh-muc-tieu-bi-tan-cong-768x432.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/neu-khong-duoc-cap-nhat-firmware-thuong-xuyen-chinh-firewall-co-the-tro-thanh-muc-tieu-bi-tan-cong-150x84.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/neu-khong-duoc-cap-nhat-firmware-thuong-xuyen-chinh-firewall-co-the-tro-thanh-muc-tieu-bi-tan-cong-696x392.png 696w\" sizes=\"auto, (max-width: 864px) 100vw, 864px\" \/><figcaption id=\"caption-attachment-10772\" class=\"wp-caption-text\">N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt Firmware th\u01b0\u1eddng xuy\u00ean, ch\u00ednh Firewall c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh m\u1ee5c ti\u00eau b\u1ecb t\u1ea5n c\u00f4ng<\/figcaption><\/figure>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"6_Giai_phap_Firewall_chuyen_nghiep_Dich_vu_VNPT_Managed_Firewall\"><\/span>6. Gi\u1ea3i ph\u00e1p Firewall chuy\u00ean nghi\u1ec7p: D\u1ecbch v\u1ee5 VNPT Managed Firewall<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\">\u0110\u1ed1i v\u1edbi doanh nghi\u1ec7p, vi\u1ec7c t\u1ef1 \u0111\u1ea7u t\u01b0 v\u00e0 qu\u1ea3n l\u00fd m\u1ed9t h\u1ec7 th\u1ed1ng firewall ph\u1ee9c t\u1ea1p c\u00f3 th\u1ec3 t\u1ed1n nhi\u1ec1u chi ph\u00ed v\u00e0 ngu\u1ed3n l\u1ef1c. <strong>D\u1ecbch v\u1ee5 VNPT Managed Firewall<\/strong> ra \u0111\u1eddi nh\u01b0 m\u1ed9t gi\u1ea3i ph\u00e1p to\u00e0n di\u1ec7n, cho ph\u00e9p doanh nghi\u1ec7p thu\u00ea v\u00e0 \u0111\u01b0\u1ee3c qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng t\u01b0\u1eddng l\u1eeda chuy\u00ean nghi\u1ec7p b\u1edfi \u0111\u1ed9i ng\u0169 chuy\u00ean gia c\u1ee7a VNPT.<\/p>\n<p style=\"text-align: justify;\"><strong>C\u00e1c \u01b0u \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i c\u1ee7a VNPT Cloud Firewall:<\/strong><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong>V\u1eadn h\u00e0nh tr\u00ean n\u1ec1n t\u1ea3ng h\u1ea1 t\u1ea7ng Cloud v\u00e0 Data Center Tier III<\/strong>: D\u1ecbch v\u1ee5 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng tr\u00ean n\u1ec1n t\u1ea3ng \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y m\u1ea1nh m\u1ebd c\u1ee7a VNPT, v\u1ed1n \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ea1i c\u00e1c <strong>Trung t\u00e2m d\u1eef li\u1ec7u (IDC) \u0111\u1ea1t chu\u1ea9n qu\u1ed1c t\u1ebf Tier III<\/strong> tr\u00ean to\u00e0n qu\u1ed1c. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh s\u1eb5n s\u00e0ng v\u00e0 \u0111\u1ed9 tin c\u1eady cao nh\u1ea5t cho h\u1ec7 th\u1ed1ng t\u01b0\u1eddng l\u1eeda c\u1ee7a b\u1ea1n, lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n n\u1ed7i lo v\u1ec1 vi\u1ec7c duy tr\u00ec ph\u1ea7n c\u1ee9ng, ngu\u1ed3n \u0111i\u1ec7n hay l\u00e0m m\u00e1t. Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng linh ho\u1ea1t c\u1ee7a n\u1ec1n t\u1ea3ng cloud c\u0169ng gi\u00fap t\u01b0\u1eddng l\u1eeda t\u1ef1 \u0111\u1ed9ng \u0111i\u1ec1u ch\u1ec9nh n\u0103ng l\u1ef1c x\u1eed l\u00fd \u0111\u1ec3 \u0111\u00e1p \u1ee9ng m\u1ecdi nhu c\u1ea7u b\u0103ng th\u00f4ng.<\/li>\n<li style=\"text-align: justify;\"><strong>B\u1ea3o v\u1ec7 to\u00e0n di\u1ec7n v\u1edbi c\u00f4ng ngh\u1ec7 NGFW v\u00e0 WAF:<\/strong> VNPT Managed Firewall t\u00edch h\u1ee3p \u0111\u1ea7y \u0111\u1ee7 c\u00e1c t\u00ednh n\u0103ng c\u1ee7a m\u1ed9t <strong>T\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi (NGFW)<\/strong>, bao g\u1ed3m ki\u1ec3m tra s\u00e2u g\u00f3i tin (DPI), nh\u1eadn bi\u1ebft v\u00e0 ki\u1ec3m so\u00e1t \u1ee9ng d\u1ee5ng, c\u00f9ng h\u1ec7 th\u1ed1ng ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp (IPS). Kh\u00f4ng ch\u1ec9 v\u1eady, gi\u1ea3i ph\u00e1p c\u00f2n \u0111\u01b0\u1ee3c trang b\u1ecb l\u1edbp b\u1ea3o v\u1ec7 chuy\u00ean d\u1ee5ng <strong>Web Application Firewall (WAF)<\/strong>, gi\u00fap ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tinh vi nh\u1eafm tr\u1ef1c ti\u1ebfp v\u00e0o website v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a doanh nghi\u1ec7p, t\u1ea1o ra m\u1ed9t l\u00e1 ch\u1eafn b\u1ea3o v\u1ec7 \u0111a t\u1ea7ng v\u1eefng ch\u1eafc.<\/li>\n<li style=\"text-align: justify;\"><strong>Qu\u1ea3n tr\u1ecb v\u00e0 gi\u00e1m s\u00e1t b\u1edfi Trung t\u00e2m \u0110i\u1ec1u h\u00e0nh An ninh (SOC) 24\/7:<\/strong> \u0110i\u1ec3m kh\u00e1c bi\u1ec7t l\u1edbn nh\u1ea5t c\u1ee7a d\u1ecbch v\u1ee5 Managed Firewall l\u00e0 h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c qu\u1ea3n tr\u1ecb, gi\u00e1m s\u00e1t v\u00e0 t\u1ed1i \u01b0u h\u00f3a li\u00ean t\u1ee5c b\u1edfi c\u00e1c chuy\u00ean gia t\u1ea1i <strong>Trung t\u00e2m \u0110i\u1ec1u h\u00e0nh An ninh (SOC)<\/strong> c\u1ee7a VNPT. \u0110\u1ed9i ng\u0169 chuy\u00ean gia ng\u01b0\u1eddi Vi\u1ec7t l\u00e0m vi\u1ec7c 24\/7 s\u1ebd thay b\u1ea1n x\u1eed l\u00fd vi\u1ec7c c\u1ea5u h\u00ecnh quy t\u1eafc, ph\u00e2n t\u00edch c\u00e1c m\u1ed1i \u0111e d\u1ecda v\u00e0 ph\u1ea3n \u1ee9ng nhanh ch\u00f3ng khi c\u00f3 s\u1ef1 c\u1ed1, \u0111\u1ea3m b\u1ea3o firewall lu\u00f4n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt v\u00e0 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 nh\u1ea5t.<\/li>\n<li style=\"text-align: justify;\"><strong>T\u00edch h\u1ee3p li\u1ec1n m\u1ea1ch v\u1edbi h\u1ec7 sinh th\u00e1i Vi\u1ec5n th\u00f4ng &#8211; An ninh m\u1ea1ng:<\/strong> Khi s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 c\u1ee7a VNPT, b\u1ea1n \u0111ang t\u1eadn d\u1ee5ng s\u1ee9c m\u1ea1nh c\u1ee7a m\u1ed9t h\u1ec7 sinh th\u00e1i \u0111\u1ed3ng b\u1ed9. VNPT Managed Firewall c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p ch\u1eb7t ch\u1ebd v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 kh\u00e1c nh\u01b0 <strong>VNPT Anti-DDoS<\/strong>, <strong>Cloud Server<\/strong> v\u00e0 <strong>\u0111\u01b0\u1eddng truy\u1ec1n Internet<\/strong>. S\u1ef1 t\u00edch h\u1ee3p n\u00e0y t\u1ea1o ra m\u1ed9t l\u1edbp ph\u00f2ng th\u1ee7 li\u1ec1n m\u1ea1ch t\u1eeb ngo\u00e0i v\u00e0o trong, cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 to\u00e0n di\u1ec7n v\u00e0 m\u1ed9t \u0111\u1ea7u m\u1ed1i h\u1ed7 tr\u1ee3 duy nh\u1ea5t m\u00e0 c\u00e1c nh\u00e0 cung c\u1ea5p \u0111\u01a1n l\u1ebb kh\u00f4ng th\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c.<\/li>\n<\/ul>\n<figure id=\"attachment_10780\" aria-describedby=\"caption-attachment-10780\" style=\"width: 1161px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10780 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/vnpt-managed-firewall-cho-phep-doanh-nghiep-thue-va-duoc-quan-tri-he-thong-tuong-lua-chuyen-nghiep-boi-doi-ngu-chuyen-gia-cua-vnpt.png\" alt=\"VNPT Managed Firewall gi\u00fap doanh nghi\u1ec7p thu\u00ea v\u00e0 qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng t\u01b0\u1eddng l\u1eeda chuy\u00ean nghi\u1ec7p b\u1edfi \u0111\u1ed9i ng\u0169 chuy\u00ean gia VNPT\" width=\"1161\" height=\"752\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/vnpt-managed-firewall-cho-phep-doanh-nghiep-thue-va-duoc-quan-tri-he-thong-tuong-lua-chuyen-nghiep-boi-doi-ngu-chuyen-gia-cua-vnpt.png 1161w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/vnpt-managed-firewall-cho-phep-doanh-nghiep-thue-va-duoc-quan-tri-he-thong-tuong-lua-chuyen-nghiep-boi-doi-ngu-chuyen-gia-cua-vnpt-300x194.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/vnpt-managed-firewall-cho-phep-doanh-nghiep-thue-va-duoc-quan-tri-he-thong-tuong-lua-chuyen-nghiep-boi-doi-ngu-chuyen-gia-cua-vnpt-1024x663.png 1024w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/vnpt-managed-firewall-cho-phep-doanh-nghiep-thue-va-duoc-quan-tri-he-thong-tuong-lua-chuyen-nghiep-boi-doi-ngu-chuyen-gia-cua-vnpt-768x497.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/vnpt-managed-firewall-cho-phep-doanh-nghiep-thue-va-duoc-quan-tri-he-thong-tuong-lua-chuyen-nghiep-boi-doi-ngu-chuyen-gia-cua-vnpt-150x97.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/vnpt-managed-firewall-cho-phep-doanh-nghiep-thue-va-duoc-quan-tri-he-thong-tuong-lua-chuyen-nghiep-boi-doi-ngu-chuyen-gia-cua-vnpt-696x451.png 696w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/vnpt-managed-firewall-cho-phep-doanh-nghiep-thue-va-duoc-quan-tri-he-thong-tuong-lua-chuyen-nghiep-boi-doi-ngu-chuyen-gia-cua-vnpt-1068x692.png 1068w\" sizes=\"auto, (max-width: 1161px) 100vw, 1161px\" \/><figcaption id=\"caption-attachment-10780\" class=\"wp-caption-text\">VNPT Managed Firewall cho ph\u00e9p doanh nghi\u1ec7p thu\u00ea v\u00e0 \u0111\u01b0\u1ee3c qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng t\u01b0\u1eddng l\u1eeda chuy\u00ean nghi\u1ec7p b\u1edfi \u0111\u1ed9i ng\u0169 chuy\u00ean gia c\u1ee7a VNPT<\/figcaption><\/figure>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"7_Giai_dap_cac_cau_hoi_thuong_gap_ve_Firewall_FAQ\"><\/span>7. Gi\u1ea3i \u0111\u00e1p c\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Firewall (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"71_Firewall_khac_gi_so_voi_phan_mem_diet_Virus\"><\/span>7.1. Firewall kh\u00e1c g\u00ec so v\u1edbi ph\u1ea7n m\u1ec1m di\u1ec7t Virus?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Firewall ng\u0103n ch\u1eb7n c\u00e1c m\u1ed1i \u0111e d\u1ecda t\u1eeb <strong>b\u00ean ngo\u00e0i m\u1ea1ng<\/strong> \u0111i v\u00e0o. Antivirus x\u1eed l\u00fd c\u00e1c m\u1ed1i \u0111e d\u1ecda \u0111\u00e3 <strong>l\u1ecdt v\u00e0o b\u00ean trong m\u00e1y t\u00ednh<\/strong>. Ch\u00fang l\u00e0 hai l\u1edbp b\u1ea3o v\u1ec7 b\u1ed5 sung cho nhau v\u00e0 \u0111\u1ec1u c\u1ea7n thi\u1ebft.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"72_Toi_co_can_ca_Firewall_phan_cung_va_phan_mem_khong\"><\/span>7.2. T\u00f4i c\u00f3 c\u1ea7n c\u1ea3 Firewall ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">C\u00f3, \u0111\u00e2y l\u00e0 m\u00f4 h\u00ecnh b\u1ea3o v\u1ec7 theo l\u1edbp (defense-in-depth) t\u1ed1t nh\u1ea5t. Firewall ph\u1ea7n c\u1ee9ng b\u1ea3o v\u1ec7 to\u00e0n b\u1ed9 m\u1ea1ng, firewall ph\u1ea7n m\u1ec1m b\u1ea3o v\u1ec7 t\u1eebng m\u00e1y t\u00ednh kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda c\u00f3 th\u1ec3 l\u00e2y lan trong ch\u00ednh m\u1ea1ng n\u1ed9i b\u1ed9.<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"73_Firewall_mac_dinh_cua_WindowsmacOS_co_du_tot_khong\"><\/span>7.3. Firewall m\u1eb7c \u0111\u1ecbnh c\u1ee7a Windows\/macOS c\u00f3 \u0111\u1ee7 t\u1ed1t kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">\u0110\u1ee7 t\u1ed1t cho nhu c\u1ea7u s\u1eed d\u1ee5ng c\u00e1 nh\u00e2n c\u01a1 b\u1ea3n nh\u01b0 l\u01b0\u1edbt web, l\u00e0m vi\u1ec7c v\u0103n ph\u00f2ng. Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi doanh nghi\u1ec7p ho\u1eb7c nh\u1eefng ng\u01b0\u1eddi d\u00f9ng c\u00f3 y\u00eau c\u1ea7u b\u1ea3o m\u1eadt cao, m\u1ed9t gi\u1ea3i ph\u00e1p NGFW chuy\u00ean d\u1ee5ng s\u1ebd c\u1ea7n thi\u1ebft.<\/p>\n<figure id=\"attachment_10768\" aria-describedby=\"caption-attachment-10768\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-10768 size-full\" src=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-ngan-chan-cac-moi-de-doa-tu-ben-ngoai-mang-di-vao.png\" alt=\"Firewall ng\u0103n ch\u1eb7n c\u00e1c m\u1ed1i \u0111e d\u1ecda t\u1eeb b\u00ean ngo\u00e0i m\u1ea1ng \u0111i v\u00e0o\" width=\"1024\" height=\"583\" srcset=\"https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-ngan-chan-cac-moi-de-doa-tu-ben-ngoai-mang-di-vao.png 1024w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-ngan-chan-cac-moi-de-doa-tu-ben-ngoai-mang-di-vao-300x171.png 300w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-ngan-chan-cac-moi-de-doa-tu-ben-ngoai-mang-di-vao-768x437.png 768w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-ngan-chan-cac-moi-de-doa-tu-ben-ngoai-mang-di-vao-150x85.png 150w, https:\/\/onesme.vn\/blog\/wp-content\/uploads\/2025\/09\/firewall-ngan-chan-cac-moi-de-doa-tu-ben-ngoai-mang-di-vao-696x396.png 696w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-10768\" class=\"wp-caption-text\">Firewall ng\u0103n ch\u1eb7n c\u00e1c m\u1ed1i \u0111e d\u1ecda t\u1eeb b\u00ean ngo\u00e0i m\u1ea1ng \u0111i v\u00e0o<\/figcaption><\/figure>\n<p style=\"text-align: justify;\"><strong><em>Firewall<\/em><\/strong><em> l\u00e0 tuy\u1ebfn ph\u00f2ng th\u1ee7 \u0111\u1ea7u ti\u00ean v\u00e0 l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n b\u1eaft bu\u1ed9c trong m\u1ecdi h\u1ec7 th\u1ed1ng m\u1ea1ng hi\u1ec7n \u0111\u1ea1i. Vi\u1ec7c n\u1eafm v\u1eefng nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u01b0\u1eddng l\u1eeda l\u00e0 y\u00eau c\u1ea7u c\u01a1 b\u1ea3n \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t c\u1ea5u tr\u00fac an ninh hi\u1ec7u qu\u1ea3 cho c\u00e1 nh\u00e2n v\u00e0 doanh nghi\u1ec7p. Vi\u1ec7c xem nh\u1eb9 l\u1edbp b\u1ea3o v\u1ec7 n\u00e0y s\u1ebd t\u1ea1o ra nh\u1eefng l\u1ed7 h\u1ed5ng nghi\u00eam tr\u1ecdng; h\u00e3y ch\u1ee7 \u0111\u1ed9ng b\u1ea3o v\u1ec7 t\u00e0i s\u1ea3n s\u1ed1 c\u1ee7a b\u1ea1n ngay h\u00f4m nay.<\/em><\/p>\n<p style=\"text-align: justify;\"><em>N\u1ebfu mu\u1ed1n t\u00ecm hi\u1ec3u chi ti\u1ebft c\u0169ng nh\u01b0 c\u00f3 nhu c\u1ea7u l\u1ef1a ch\u1ecdn d\u1ecbch v\u1ee5 VNPT Managed Firewall, qu\u00fd kh\u00e1ch vui l\u00f2ng li\u00ean h\u1ec7:<\/em><\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong><em>Hotline: <\/em><\/strong><em>1800.1260 (Mi\u1ec5n ph\u00ed 24\/7)<\/em><\/li>\n<li style=\"text-align: justify;\"><strong><em>Website: <\/em><\/strong><a href=\"https:\/\/vnpt.vn\/\" target=\"_blank\" rel=\"noopener\"><em><u>https:\/\/vnpt.vn\/<\/u><\/em><\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Firewall (T\u01b0\u1eddng l\u1eeda) l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng an ninh m\u1ea1ng, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t r\u00e0o ch\u1eafn b\u1ea3o v\u1ec7 gi\u1eefa m\u1ea1ng n\u1ed9i b\u1ed9 an to\u00e0n c\u1ee7a b\u1ea1n v\u00e0 m\u1ea1ng Internet kh\u00f4ng \u0111\u00e1ng tin c\u1eady b\u00ean ngo\u00e0i. Gi\u1ed1ng nh\u01b0 m\u1ed9t ng\u01b0\u1eddi b\u1ea3o v\u1ec7 \u1edf c\u1ed5ng, t\u01b0\u1eddng l\u1eeda ki\u1ec3m so\u00e1t t\u1ea5t c\u1ea3 c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u ra v\u00e0o [&hellip;]<\/p>\n","protected":false},"author":44,"featured_media":10767,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":{"0":"post-10765","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tin-tuc-su-kien"},"_links":{"self":[{"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/posts\/10765","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/users\/44"}],"replies":[{"embeddable":true,"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/comments?post=10765"}],"version-history":[{"count":4,"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/posts\/10765\/revisions"}],"predecessor-version":[{"id":11114,"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/posts\/10765\/revisions\/11114"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/media\/10767"}],"wp:attachment":[{"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/media?parent=10765"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/categories?post=10765"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onesme.vn\/blog\/wp-json\/wp\/v2\/tags?post=10765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}