{"id":4674,"date":"2025-10-17T11:12:00","date_gmt":"2025-10-17T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/what-is-the-network-firewall\/"},"modified":"2026-06-22T09:01:54","modified_gmt":"2026-06-22T09:01:54","slug":"what-is-the-network-firewall","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-the-network-firewall","title":{"rendered":"M\u1ed9t H\u01b0\u1edbng D\u1eabn Th\u1ef1c T\u1ebf V\u1ec1 T\u01b0\u1eddng L\u1eeda M\u1ea1ng, C\u00e1c Lo\u1ea1i V\u00e0 Th\u1ef1c Ti\u1ec5n T\u1ed1t Nh\u1ea5t"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9aa0a53eb27e4c0190021d6a6ebe5540.webp\" alt=\"What Is a Firewall?\" class=\"wp-image-4670\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9aa0a53eb27e4c0190021d6a6ebe5540.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9aa0a53eb27e4c0190021d6a6ebe5540-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9aa0a53eb27e4c0190021d6a6ebe5540-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9aa0a53eb27e4c0190021d6a6ebe5540-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9aa0a53eb27e4c0190021d6a6ebe5540-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f T\u01b0\u1eddng l\u1eeda l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>t\u01b0\u1eddng l\u1eeda<\/strong> l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu c\u1ee7a b\u1ea3o m\u1eadt m\u1ea1ng, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t <strong>r\u00e0o c\u1ea3n gi\u1eefa c\u00e1c m\u1ea1ng n\u1ed9i b\u1ed9 \u0111\u00e1ng tin c\u1eady v\u00e0 c\u00e1c k\u1ebft n\u1ed1i b\u00ean ngo\u00e0i kh\u00f4ng \u0111\u00e1ng tin c\u1eady,<\/strong> ch\u1eb3ng h\u1ea1n nh\u01b0 internet. N\u00f3 gi\u00e1m s\u00e1t, l\u1ecdc v\u00e0 ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng v\u00e0o v\u00e0 ra d\u1ef1a tr\u00ean c\u00e1c quy t\u1eafc b\u1ea3o m\u1eadt \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc, gi\u00fap ng\u0103n ch\u1eb7n truy c\u1eadp tr\u00e1i ph\u00e9p, vi ph\u1ea1m d\u1eef li\u1ec7u v\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, t\u01b0\u1eddng l\u1eeda ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nh\u01b0 m\u1ed9t <strong>tr\u1ea1m ki\u1ec3m so\u00e1t an ninh<\/strong>\u2014 n\u00f3 ki\u1ec3m tra m\u1ecdi g\u00f3i d\u1eef li\u1ec7u \u0111i v\u00e0o ho\u1eb7c r\u1eddi kh\u1ecfi m\u1ea1ng, cho ph\u00e9p ho\u1eb7c ch\u1eb7n ch\u00fang theo c\u00e1c ch\u00ednh s\u00e1ch \u0111\u00e3 c\u1ea5u h\u00ecnh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f V\u00ec sao t\u01b0\u1eddng l\u1eeda quan tr\u1ecdng trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi s\u1ed1 l\u01b0\u1ee3ng thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i ng\u00e0y c\u00e0ng t\u0103ng hi\u1ec7n nay, c\u00e1c m\u1ed1i \u0111e d\u1ecda \u0111\u1ed1i v\u1edbi m\u1ea1ng tr\u1edf n\u00ean tinh vi h\u01a1n. T\u01b0\u1eddng l\u1eeda l\u00e0 <strong>tuy\u1ebfn ph\u00f2ng th\u1ee7 \u0111\u1ea7u ti\u00ean<\/strong> trong chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o m\u1eadt nhi\u1ec1u l\u1edbp, \u0111\u1ea3m b\u1ea3o ch\u1ec9 c\u00f3 l\u01b0u l\u01b0\u1ee3ng h\u1ee3p ph\u00e1p m\u1edbi \u0111\u01b0\u1ee3c truy\u1ec1n qua h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c doanh nghi\u1ec7p, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-data-center\/\">trung t\u00e2m d\u1eef li\u1ec7u<br><\/a>, v\u00e0 ngay c\u1ea3 m\u1ea1ng gia \u0111\u00ecnh \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o t\u01b0\u1eddng l\u1eeda \u0111\u1ec3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ch\u1eb7n l\u01b0u l\u01b0\u1ee3ng \u0111\u1ed9c h\u1ea1i ho\u1eb7c \u0111\u00e1ng ng\u1edd<\/p><\/li>\n\n\n\n<li><p>Ng\u0103n ch\u1eb7n r\u00f2 r\u1ec9 d\u1eef li\u1ec7u v\u00e0 c\u00e1c n\u1ed7 l\u1ef1c x\u00e2m nh\u1eadp<\/p><\/li>\n\n\n\n<li><p>B\u1ea3o v\u1ec7 c\u00e1c thi\u1ebft b\u1ecb v\u00e0 m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ng<\/p><\/li>\n\n\n\n<li><p>Th\u1ef1c thi c\u00e1c ch\u00ednh s\u00e1ch ki\u1ec3m so\u00e1t truy c\u1eadp tr\u00ean to\u00e0n c\u00f4ng ty<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch tri\u1ec3n khai m\u1ed9t t\u01b0\u1eddng l\u1eeda \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch, c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 th\u1ec3 gi\u1ea3m \u0111\u00e1ng k\u1ec3 nguy c\u01a1 b\u1ecb t\u1ea5n c\u00f4ng nh\u01b0 ransomware, DDoS ho\u1eb7c l\u1eeba \u0111\u1ea3o qua email (phishing).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f C\u00e1c lo\u1ea1i t\u01b0\u1eddng l\u1eeda ch\u00ednh<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u01b0\u1eddng l\u1eeda t\u1ed3n t\u1ea1i d\u01b0\u1edbi nhi\u1ec1u d\u1ea1ng kh\u00e1c nhau, m\u1ed7i lo\u1ea1i cung c\u1ea5p m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt v\u00e0 ch\u1ee9c n\u0103ng kh\u00e1c nhau. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c danh m\u1ee5c n\u00e0y gi\u00fap k\u1ef9 s\u01b0 m\u1ea1ng v\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean CNTT l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p nh\u1ea5t cho m\u00f4i tr\u01b0\u1eddng c\u1ee7a h\u1ecd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u01b0\u1eddng l\u1eeda l\u1ecdc g\u00f3i tin (Packet-Filtering Firewall)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Lo\u1ea1i t\u01b0\u1eddng l\u1eeda s\u1edbm nh\u1ea5t v\u00e0 \u0111\u01a1n gi\u1ea3n nh\u1ea5t, ki\u1ec3m tra c\u00e1c g\u00f3i tin m\u1ea1ng d\u1ef1a tr\u00ean \u0111\u1ecba ch\u1ec9 IP, c\u1ed5ng v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ppp-point-to-point-protocol-explained\/\">giao th\u1ee9c<\/a>. M\u1eb7c d\u00f9 nh\u1eb9, nh\u01b0ng n\u00f3 thi\u1ebfu kh\u1ea3 n\u0103ng nh\u1eadn th\u1ee9c ng\u1eef c\u1ea3nh n\u00e2ng cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u01b0\u1eddng l\u1eeda ki\u1ec3m tra tr\u1ea1ng th\u00e1i (Stateful Inspection Firewall)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>t\u01b0\u1eddng l\u1eeda l\u1ecdc g\u00f3i tin \u0111\u1ed9ng (dynamic packet-filtering firewall)<\/strong>, n\u00f3 theo d\u00f5i tr\u1ea1ng th\u00e1i c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u00e0 cho ph\u00e9p c\u00e1c g\u00f3i tin kh\u1edbp v\u1edbi m\u1ed9t phi\u00ean \u0111ang ho\u1ea1t \u0111\u1ed9ng \u0111\u00e3 bi\u1ebft. Lo\u1ea1i n\u00e0y cung c\u1ea5p m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt cao h\u01a1n v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u01b0\u1eddng l\u1eeda \u0111\u1ea1i di\u1ec7n (Proxy Firewall \u2013 C\u1ed5ng c\u1ea5p \u1ee9ng d\u1ee5ng)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t trung gian gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 internet, ph\u00e2n t\u00edch l\u01b0u l\u01b0\u1ee3ng \u1edf t\u1ea7ng \u1ee9ng d\u1ee5ng. Lo\u1ea1i n\u00e0y cung c\u1ea5p kh\u1ea3 n\u0103ng ki\u1ec3m tra s\u00e2u v\u00e0 che gi\u1ea5u c\u1ea5u tr\u00fac m\u1ea1ng n\u1ed9i b\u1ed9, nh\u01b0ng c\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u0111\u1ed9 tr\u1ec5.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi (Next-Generation Firewall \u2013 NGFW)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c NGFW hi\u1ec7n \u0111\u1ea1i k\u1ebft h\u1ee3p ch\u1ee9c n\u0103ng l\u1ecdc truy\u1ec1n th\u1ed1ng v\u1edbi <strong>ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp, ki\u1ec3m tra s\u00e2u g\u00f3i tin v\u00e0 nh\u1eadn th\u1ee9c \u1ee9ng d\u1ee5ng<\/strong>. Ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n c\u00e1c m\u1ed1i \u0111e d\u1ecda tinh vi m\u00e0 c\u00e1c t\u01b0\u1eddng l\u1eeda c\u0169 h\u01a1n c\u00f3 th\u1ec3 b\u1ecf s\u00f3t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f C\u00e1ch t\u01b0\u1eddng l\u1eeda ho\u1ea1t \u0111\u1ed9ng<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"465\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9fd9076e16b74f51877a240f9b664fa7-1024x465.webp\" alt=\"Next-Generation Firewall (NGFW)\" class=\"wp-image-4671\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9fd9076e16b74f51877a240f9b664fa7-1024x465.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9fd9076e16b74f51877a240f9b664fa7-300x136.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9fd9076e16b74f51877a240f9b664fa7-768x349.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9fd9076e16b74f51877a240f9b664fa7-18x8.webp 18w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9fd9076e16b74f51877a240f9b664fa7.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\">\n<li><p>L\u01b0u l\u01b0\u1ee3ng v\u00e0o \u0111\u1ebfn giao di\u1ec7n t\u01b0\u1eddng l\u1eeda.<\/p><\/li>\n\n\n\n<li><p>T\u01b0\u1eddng l\u1eeda ph\u00e2n lo\u1ea1i c\u00e1c g\u00f3i tin theo \u0111\u1ecba ch\u1ec9 IP, c\u1ed5ng, <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ppp-point-to-point-protocol-explained\/\" target=\"_blank\" rel=\"\">giao th\u1ee9c<\/a>, \u1ee9ng d\u1ee5ng ho\u1eb7c ng\u01b0\u1eddi d\u00f9ng.<\/p><\/li>\n\n\n\n<li><p>N\u00f3 so s\u00e1nh c\u00e1c g\u00f3i tin v\u1edbi c\u00e1c quy t\u1eafc \u0111\u00e3 x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc (cho ph\u00e9p, t\u1eeb ch\u1ed1i, ki\u1ec3m tra, chuy\u1ec3n ti\u1ebfp qua proxy).<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb c\u00f3 tr\u1ea1ng th\u00e1i (stateful), ch\u1ec9 c\u00e1c g\u00f3i tin kh\u1edbp v\u1edbi phi\u00ean h\u1ee3p l\u1ec7 m\u1edbi \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn.<\/p><\/li>\n\n\n\n<li><p>C\u00e1c c\u00f4ng c\u1ee5 ki\u1ec3m tra s\u00e2u ho\u1eb7c ph\u00e2n t\u00edch tr\u00ed tu\u1ec7 v\u1ec1 m\u1ed1i \u0111e d\u1ecda s\u1ebd ph\u00e2n t\u00edch c\u00e1c lu\u1ed3ng \u0111\u00e1ng ng\u1edd tr\u01b0\u1edbc khi \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh cu\u1ed1i c\u00f9ng.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t khi s\u1eed d\u1ee5ng t\u01b0\u1eddng l\u1eeda nh\u1eb1m t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt m\u1ea1ng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 duy tr\u00ec kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 v\u1eefng ch\u1eafc, t\u01b0\u1eddng l\u1eeda ph\u1ea3i \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch v\u00e0 th\u01b0\u1eddng xuy\u00ean b\u1ea3o tr\u00ec.<br>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u0111\u01b0\u1ee3c c\u00e1c chuy\u00ean gia \u00e1p d\u1ee5ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>X\u00e1c \u0111\u1ecbnh r\u00f5 c\u00e1c ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt:<\/strong> Thi\u1ebft l\u1eadp l\u01b0u l\u01b0\u1ee3ng n\u00e0o \u0111\u01b0\u1ee3c ph\u00e9p ho\u1eb7c b\u1ecb t\u1eeb ch\u1ed1i d\u1ef1a tr\u00ean vai tr\u00f2, \u1ee9ng d\u1ee5ng v\u00e0 v\u00f9ng m\u1ea1ng.<\/p><\/li>\n\n\n\n<li><p><strong>\u0110\u00e1nh gi\u00e1 \u0111\u1ecbnh k\u1ef3 c\u00e1c quy t\u1eafc:<\/strong> Ki\u1ec3m to\u00e1n v\u00e0 c\u1eadp nh\u1eadt c\u00e1c quy t\u1eafc nh\u1eb1m lo\u1ea1i b\u1ecf c\u00e1c m\u1ee5c l\u1ed7i th\u1eddi ho\u1eb7c d\u01b0 th\u1eeba.<\/p><\/li>\n\n\n\n<li><p><strong>B\u1eadt t\u00ednh n\u0103ng ghi nh\u1eadt k\u00fd &amp; gi\u00e1m s\u00e1t:<\/strong> Theo d\u00f5i nh\u1eadt k\u00fd t\u01b0\u1eddng l\u1eeda \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c m\u1eabu b\u1ea5t th\u01b0\u1eddng ho\u1eb7c c\u00e1c n\u1ed7 l\u1ef1c truy c\u1eadp tr\u00e1i ph\u00e9p.<\/p><\/li>\n\n\n\n<li><p><strong>C\u1eadp nh\u1eadt firmware th\u01b0\u1eddng xuy\u00ean:<\/strong> C\u00e1c b\u1ea3n c\u1eadp nh\u1eadt \u0111\u1ecbnh k\u1ef3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 tr\u01b0\u1edbc c\u00e1c l\u1ed7 h\u1ed5ng m\u1edbi.<\/p><\/li>\n\n\n\n<li><p><strong>K\u1ebft h\u1ee3p v\u1edbi c\u00e1c l\u1edbp b\u1ea3o m\u1eadt kh\u00e1c:<\/strong> S\u1eed d\u1ee5ng t\u01b0\u1eddng l\u1eeda c\u00f9ng v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n x\u00e2m nh\u1eadp (IDS), VPN v\u00e0 b\u1ea3o m\u1eadt \u0111\u1ea7u cu\u1ed1i.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f Danh s\u00e1ch ki\u1ec3m tra khi l\u1ef1a ch\u1ecdn t\u01b0\u1eddng l\u1eeda<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>X\u00e1c \u0111\u1ecbnh r\u00f5 <strong>tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng (use case)<\/strong>: b\u1ea3o v\u1ec7 bi\u00ean, ph\u00e2n \u0111o\u1ea1n m\u1ea1ng hay b\u1ea3o v\u1ec7 \u0111\u00e1m m\u00e2y.<\/p><\/li>\n\n\n\n<li><p>\u0110\u00e1nh gi\u00e1 <strong>th\u00f4ng l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 tr\u1ec5<\/strong> d\u01b0\u1edbi t\u1ea3i ki\u1ec3m tra \u0111\u1ea7y \u0111\u1ee7.<\/p><\/li>\n\n\n\n<li><p>Ki\u1ec3m tra <strong>c\u00e1c t\u00f9y ch\u1ecdn t\u00edch h\u1ee3p (integration)<\/strong> v\u1edbi SIEM, IAM v\u00e0 API \u0111\u00e1m m\u00e2y.<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea3m b\u1ea3o <strong>qu\u1ea3n l\u00fd ch\u00ednh s\u00e1ch (policy management)<\/strong> ph\u1ea3i tr\u1ef1c quan v\u00e0 c\u00f3 th\u1ec3 ki\u1ec3m to\u00e1n \u0111\u01b0\u1ee3c.<\/p><\/li>\n\n\n\n<li><p>\u0110\u00e1nh gi\u00e1 <strong>t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu (TCO)<\/strong>, bao g\u1ed3m c\u00e1c g\u00f3i \u0111\u0103ng k\u00fd v\u00e0 c\u1eadp nh\u1eadt.<\/p><\/li>\n\n\n\n<li><p>X\u00e1c nh\u1eadn <strong>t\u00ednh minh b\u1ea1ch c\u1ee7a nh\u00e0 cung c\u1ea5p (vendor transparency)<\/strong> v\u00e0 t\u1ea7n su\u1ea5t ph\u00e1t h\u00e0nh b\u1ea3n v\u00e1 b\u1ea3o m\u1eadt.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f LINK-PP h\u1ed7 tr\u1ee3 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng an to\u00e0n nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3b428b4449d743c2ac63f7f7e0a1587a.webp\" alt=\"LINK-PP\" class=\"wp-image-4672\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3b428b4449d743c2ac63f7f7e0a1587a.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3b428b4449d743c2ac63f7f7e0a1587a-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3b428b4449d743c2ac63f7f7e0a1587a-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3b428b4449d743c2ac63f7f7e0a1587a-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3b428b4449d743c2ac63f7f7e0a1587a-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea1i <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/\"><strong>LINK-PP<\/strong><\/a>, ch\u00fang t\u00f4i hi\u1ec3u r\u1eb1ng kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i an to\u00e0n b\u1eaft \u0111\u1ea7u t\u1eeb l\u1edbp ph\u1ea7n c\u1ee9ng. D\u00f2ng s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i g\u1ed3m <strong>\u0111\u1ea7u n\u1ed1i RJ45 c\u00f3 cu\u1ed9n c\u1ea3m t\u1eeb t\u00ednh, <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\"><strong>B\u1ed9 bi\u1ebfn \u00e1p Ethernet<\/strong><\/a><strong>, v\u00e0 c\u00e1c module giao di\u1ec7n m\u1ea1ng<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u \u1ed5n \u0111\u1ecbnh v\u00e0 ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) \u2014 \u0111i\u1ec1u ki\u1ec7n thi\u1ebft y\u1ebfu cho vi\u1ec7c giao ti\u1ebfp \u0111\u00e1ng tin c\u1eady gi\u1eefa t\u01b0\u1eddng l\u1eeda, b\u1ed9 chuy\u1ec3n m\u1ea1ch (switch) v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn (router).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f9 b\u1ea1n \u0111ang thi\u1ebft k\u1ebf m\u1ea1ng doanh nghi\u1ec7p hay t\u00edch h\u1ee3p c\u00e1c h\u1ec7 th\u1ed1ng h\u1ed7 tr\u1ee3 PoE, c\u00e1c th\u00e0nh ph\u1ea7n LINK-PP \u0111\u1ec1u mang l\u1ea1i <strong>hi\u1ec7u n\u0103ng cao, \u0111\u1ed9 nguy\u00ean v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i<\/strong>\u2014 gi\u00fap c\u00e1c gi\u1ea3i ph\u00e1p t\u01b0\u1eddng l\u1eeda c\u1ee7a b\u1ea1n v\u1eadn h\u00e0nh v\u1edbi hi\u1ec7u qu\u1ea3 t\u1ed1i \u0111a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1m ph\u00e1 c\u00e1c <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\">\u0110\u1ea7u n\u1ed1i RJ45 v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n cu\u1ed9n c\u1ea3m t\u1eeb t\u00ednh<\/a> \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng Ethernet an to\u00e0n v\u00e0 t\u1ed1c \u0111\u1ed9 cao, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u an ninh m\u1ea1ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQs)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa t\u01b0\u1eddng l\u1eeda v\u00e0 h\u1ec7 th\u1ed1ng ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp (IPS) l\u00e0 g\u00ec?<\/strong><br>T\u01b0\u1eddng l\u1eeda th\u1ef1c thi c\u00e1c quy t\u1eafc truy c\u1eadp v\u00e0 l\u1ecdc l\u01b0u l\u01b0\u1ee3ng, trong khi<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ips-intrusion-prevention-system-explained\/\"> H\u1ec7 th\u1ed1ng ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp (IPS)<\/a> h\u1ec7 th\u1ed1ng ng\u0103n ch\u1eb7n x\u00e2m nh\u1eadp (IPS) ph\u00e2n t\u00edch c\u00e1c g\u00f3i tin nh\u1eb1m ph\u00e1t hi\u1ec7n n\u1ed9i dung \u0111\u1ed9c h\u1ea1i v\u00e0 ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng. H\u1ea7u h\u1ebft c\u00e1c t\u01b0\u1eddng l\u1eeda th\u1ebf h\u1ec7 m\u1edbi (NGFW) \u0111\u1ec1u t\u00edch h\u1ee3p c\u1ea3 hai ch\u1ee9c n\u0103ng n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u01b0\u1eddng l\u1eeda ph\u1ea7n m\u1ec1m c\u00f3 hi\u1ec7u qu\u1ea3 ngang b\u1eb1ng t\u01b0\u1eddng l\u1eeda ph\u1ea7n c\u1ee9ng kh\u00f4ng?<\/strong><br>\u0110i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o t\u1eebng tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng. T\u01b0\u1eddng l\u1eeda ph\u1ea7n m\u1ec1m ch\u1ea1y tr\u00ean m\u00e1y ch\u1ee7 ho\u1eb7c thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i (host-based) r\u1ea5t c\u1ea7n thi\u1ebft cho b\u1ea3o m\u1eadt \u0111\u1ea7u cu\u1ed1i, trong khi t\u01b0\u1eddng l\u1eeda ph\u1ea7n c\u1ee9ng ho\u1eb7c \u1ea3o l\u1ea1i x\u1eed l\u00fd vi\u1ec7c b\u1ea3o v\u1ec7 bi\u00ean quy m\u00f4 l\u1edbn. C\u00e1ch ti\u1ebfp c\u1eadn t\u1ed1i \u01b0u l\u00e0 k\u1ebft h\u1ee3p c\u1ea3 hai lo\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c quy t\u1eafc t\u01b0\u1eddng l\u1eeda n\u00ean \u0111\u01b0\u1ee3c xem x\u00e9t l\u1ea1i bao nhi\u00eau l\u1ea7n trong m\u1ed9t n\u0103m?<\/strong><br>C\u00e1c ch\u00ednh s\u00e1ch t\u01b0\u1eddng l\u1eeda n\u00ean \u0111\u01b0\u1ee3c xem x\u00e9t l\u1ea1i \u00edt nh\u1ea5t m\u1ed7i qu\u00fd ho\u1eb7c b\u1ea5t c\u1ee9 khi n\u00e0o x\u1ea3y ra nh\u1eefng thay \u0111\u1ed5i l\u1edbn trong m\u1ea1ng \u0111\u1ec3 duy tr\u00ec t\u00ednh tu\u00e2n th\u1ee7 b\u1ea3o m\u1eadt v\u00e0 hi\u1ec7u su\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u01b0\u1eddng l\u1eeda v\u1eabn l\u00e0 m\u1ed9t <strong>tr\u1ee5 c\u1ed9t c\u1ee7a b\u1ea3o m\u1eadt m\u1ea1ng<\/strong>, b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u, h\u1ec7 th\u1ed1ng v\u00e0 ng\u01b0\u1eddi d\u00f9ng tr\u01b0\u1edbc m\u1ed9t lo\u1ea1t ng\u00e0y c\u00e0ng t\u0103ng c\u00e1c m\u1ed1i \u0111e d\u1ecda an ninh m\u1ea1ng.<br>B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 c\u00e1c lo\u1ea1i t\u01b0\u1eddng l\u1eeda, ch\u1ee9c n\u0103ng v\u00e0 c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 c\u1ea5u h\u00ecnh\u2014c\u0169ng nh\u01b0 k\u1ebft h\u1ee3p ch\u00fang v\u1edbi <strong>c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00e1ng tin c\u1eady t\u1eeb LINK-PP<\/strong>\u2014b\u1ea1n c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng an to\u00e0n h\u01a1n, b\u1ec1n b\u1ec9 h\u01a1n v\u00e0 hi\u1ec7u su\u1ea5t cao h\u01a1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee1\ufe0f \u0110\u1ecdc th\u00eam \u0111\u1ec1 xu\u1ea5t<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/www.rj45-modularjack.com\/news\/poe-standards-complete-guide-ieee-802-3af-802-3at-and-802-3bt-246818.html\" target=\"_blank\" rel=\"\">T\u00ecm hi\u1ec3u c\u00e1c ti\u00eau chu\u1ea9n PoE (802.3af \/ at \/ bt)<\/a><\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-nat-network-address-translation\/\" target=\"_blank\" rel=\"\">NAT (D\u1ecbch \u0111\u1ecba ch\u1ec9 m\u1ea1ng) l\u00e0 g\u00ec?<\/a><\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/lldp-in-power-over-ethernet-systems\/\" target=\"_blank\" rel=\"\">LLDP ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o trong c\u00e1c m\u1ea1ng Ethernet hi\u1ec7n \u0111\u1ea1i<\/a><\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-cloud-storage\/\" target=\"_new\" rel=\"noopener\" class=\"decorated-link\">L\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y l\u00e0 g\u00ec? L\u1ee3i \u00edch, c\u00e1c lo\u1ea1i v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/a><\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ppp-point-to-point-protocol-explained\/\" target=\"_new\" rel=\"noopener\" class=\"decorated-link\">Giao th\u1ee9c PPP (Point-to-Point Protocol) \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch<\/a><\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-servers-components-types-functions\/\" target=\"_new\" rel=\"noopener\" class=\"decorated-link\">M\u00e1y ch\u1ee7 l\u00e0 g\u00ec? C\u00e1c th\u00e0nh ph\u1ea7n, lo\u1ea1i v\u00e0 ch\u1ee9c n\u0103ng<\/a><\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-data-center\/\" target=\"_new\" rel=\"noopener\" class=\"decorated-link\">Trung t\u00e2m d\u1eef li\u1ec7u l\u00e0 g\u00ec? Ki\u1ebfn tr\u00fac v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n then ch\u1ed1t<\/a><\/p><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Learn what a firewall is, how different firewalls (stateful, proxy, NGFW, WAF) work, and practical selection &#038; deployment tips for secure networks.<\/p>","protected":false},"author":1,"featured_media":4673,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[22,23,24],"class_list":["post-4674","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-integrated-rj45-connectors","tag-link-pp-lan-transformers","tag-link-pp"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4674","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=4674"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4674\/revisions"}],"predecessor-version":[{"id":11352,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4674\/revisions\/11352"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4673"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4674"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4674"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4674"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}