{"id":6639,"date":"2021-09-27T09:15:47","date_gmt":"2021-09-27T02:15:47","guid":{"rendered":"https:\/\/idconline.vn\/blog\/?p=6639"},"modified":"2021-09-27T09:15:50","modified_gmt":"2021-09-27T02:15:50","slug":"firewall-la-gi-filewall-dung-de%cc%89-lam-gi","status":"publish","type":"post","link":"https:\/\/idconline.vn\/blog\/firewall-la-gi-filewall-dung-de%cc%89-lam-gi\/","title":{"rendered":"Firewall la\u0300 gi\u0300? Filewall du\u0300ng \u0111\u00ea\u0309 la\u0300m gi\u0300?"},"content":{"rendered":"\n<p>Trong th\u1eddi \u0111\u1ea1i c\u00f4ng ngh\u1ec7 th\u00f4ng tin ph\u00e1t tri\u1ec3n nh\u01b0 v\u0169 b\u00e3o hi\u1ec7n nay. Vi\u1ec7c s\u1eed d\u1ee5ng v\u00e0 \u0111\u1ea3m b\u1ea3o an to\u00e0n th\u00f4ng tin \u0111\u01b0\u1ee3c \u01b0u ti\u00ean v\u00e0 ch\u00fa tr\u1ecdng h\u01a1n. Tr\u01b0\u1edbc t\u00ecnh h\u00ecnh \u0111\u00f3, Firewall n\u00e0y xu\u1ea5t hi\u1ec7n v\u00e0 nhanh ch\u00f3ng tr\u1edf th\u00e0nh m\u1ed9t gi\u1ea3i ph\u00e1p kh\u00f4ng th\u1ec3 thi\u1ebfu gi\u00fap c\u00e1c c\u00f4ng ty b\u1ea3o v\u1ec7 th\u00f4ng tin, ng\u0103n ng\u1eeba v\u00e0 gi\u1ea3m thi\u1ec3u thi\u1ec7t h\u1ea1i.&nbsp;<\/p>\n\n\n\n<div id=\"toc_container\" class=\"toc_white no_bullets\"><p class=\"toc_title\">M\u1ee5c l\u1ee5c<\/p><ul class=\"toc_list\"><li><a href=\"#Firewall_la_gi\">Firewall l\u00e0 g\u00ec?<\/a><\/li><li><a href=\"#Tuong_lua_co_vai_tro_nhu_nao\">T\u01b0\u1eddng l\u1eeda c\u00f3 vai tr\u00f2 nh\u01b0 n\u00e0o?<\/a><\/li><li><a href=\"#Phan_loai_va_thanh_phan_cua_Firewall\">Ph\u00e2n lo\u1ea1i v\u00e0 th\u00e0nh ph\u1ea7n c\u1ee7a Firewall<\/a><ul><li><a href=\"#Personal_Firewallnbsp\">Personal Firewall&nbsp;<\/a><\/li><li><a href=\"#Network_Firewall\">Network Firewall<\/a><\/li><\/ul><\/li><\/ul><\/div>\n<h2 class=\"wp-block-heading\"><span id=\"Firewall_la_gi\">Firewall l\u00e0 g\u00ec?<\/span><\/h2>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/firewall-idc-online.jpg\" alt=\"\" class=\"wp-image-6640\" width=\"768\" srcset=\"https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/firewall-idc-online.jpg 825w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/firewall-idc-online-300x182.jpg 300w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/firewall-idc-online-768x465.jpg 768w\" sizes=\"(max-width: 825px) 100vw, 825px\" \/><figcaption>Kha\u0301i ni\u00ea\u0323m Firewall<\/figcaption><\/figure><\/div>\n\n\n\n<p>FireWall, m\u1ed9t thu\u1eadt ng\u1eef trong ng\u00e0nh m\u1ea1ng m\u00e1y t\u00ednh. N\u00f3i chung, n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u01b0\u1eddng l\u1eeda, b\u1ea3o m\u1eadt m\u1ea1ng v\u00e0 b\u1ea3o v\u1ec7 th\u00f4ng tin m\u1ea1ng. T\u01b0\u1eddng l\u1eeda c\u00f3 hai lo\u1ea1i ph\u1ea7n c\u1ee9ng v\u00e0 ph\u1ea7n m\u1ec1m. T\u00edch h\u1ee3p v\u00e0o h\u1ec7 th\u1ed1ng v\u00e0 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t r\u00e0o c\u1ea3n gi\u1eefa truy c\u1eadp an to\u00e0n v\u00e0 kh\u00f4ng an to\u00e0n. Ch\u1ed1ng l\u1ea1i truy c\u1eadp tr\u00e1i ph\u00e9p, ch\u1ed1ng vi r\u00fat, v.v. \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng th\u00f4ng tin n\u1ed9i b\u1ed9 b\u1ecb \u0111\u00e1nh c\u1eafp do truy c\u1eadp k\u00e9m.<\/p>\n\n\n\n<p>M\u1ed7i m\u00e1y t\u00ednh k\u1ebft n\u1ed1i Internet \u0111\u1ec1u c\u00f3 t\u01b0\u1eddng l\u1eeda. H\u1ec7 th\u1ed1ng c\u00e1c thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i m\u1ea1ng c\u0169ng s\u1ebd c\u00f3 m\u1ed9t t\u01b0\u1eddng l\u1eeda \u0111\u1ec3 qu\u1ea3n l\u00fd truy c\u1eadp v\u00e0o v\u00e0 ra v\u00e0o m\u1ea1ng. Ch\u00fang th\u01b0\u1eddng gi\u00e1m s\u00e1t c\u00e1c thi\u1ebft b\u1ecb d\u1ef1a tr\u00ean \u0111\u1ecba ch\u1ec9 IP &#8211; \u0111\u1ecba ch\u1ec9 giao th\u1ee9c Internet Protocol Address.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"Tuong_lua_co_vai_tro_nhu_nao\">T\u01b0\u1eddng l\u1eeda c\u00f3 vai tr\u00f2 nh\u01b0 n\u00e0o?<\/span><\/h2>\n\n\n\n<p>T\u01b0\u1eddng l\u1eeda gi\u00fap ki\u1ec3m so\u00e1t lu\u1ed3ng th\u00f4ng tin gi\u1eefa m\u1ea1ng n\u1ed9i b\u1ed9 v\u00e0 Internet, nh\u1eadn bi\u1ebft v\u00e0 \u0111\u00e1nh gi\u00e1 c\u00e1c h\u00e0nh vi \u0111\u01b0\u1ee3c v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c truy c\u1eadp trong h\u1ec7 th\u1ed1ng, do \u0111\u00f3 \u0111\u1ea3m b\u1ea3o an ninh t\u1ed1i \u0111a.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall-1024x643.jpg\" alt=\"\" class=\"wp-image-6641\" width=\"768\" srcset=\"https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall-1024x643.jpg 1024w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall-300x188.jpg 300w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall-768x482.jpg 768w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall-1536x964.jpg 1536w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall-2048x1286.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Vai tro\u0300 cu\u0309a Firewall<\/figcaption><\/figure><\/div>\n\n\n\n<p>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a d\u00f2ng thi\u1ebft b\u1ecb n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft trong c\u00e1c g\u1ea1ch \u0111\u1ea7u d\u00f2ng sau:<\/p>\n\n\n\n<ul><li>Ng\u1eaft c\u00e1c d\u1ecbch v\u1ee5 truy c\u1eadp b\u00ean ngo\u00e0i \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng th\u00f4ng tin ch\u1ec9 c\u00f3 s\u1eb5n tr\u00ean m\u1ea1ng n\u1ed9i b\u1ed9.<\/li><li>K\u00edch ho\u1ea1t ho\u1eb7c h\u1ee7y k\u00edch ho\u1ea1t quy\u1ec1n truy c\u1eadp v\u00e0o c\u00e1c d\u1ecbch v\u1ee5 b\u00ean ngo\u00e0i.<\/li><li>Ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb b\u00ean ngo\u00e0i.<\/li><li>H\u1ed7 tr\u1ee3 ki\u1ec3m so\u00e1t truy c\u1eadp (b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1eb7t l\u1ec7nh c\u1ea5m ho\u1eb7c cho ph\u00e9p).<\/li><li>Ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.&nbsp;<\/li><li>Qu\u1ea3n l\u00fd v\u00e0 ki\u1ec3m so\u00e1t lu\u1ed3ng d\u1eef li\u1ec7u trong m\u1ea1ng.<\/li><li>C\u1ea5p quy\u1ec1n truy c\u1eadp.<\/li><li>Ki\u1ec3m so\u00e1t n\u1ed9i dung th\u00f4ng tin v\u00e0 g\u00f3i tin l\u01b0u chuy\u1ec3n tr\u00ean m\u1ea1ng.<\/li><li>L\u1ecdc g\u00f3i tin d\u1ef1a tr\u00ean \u0111\u1ecba ch\u1ec9 ngu\u1ed3n, \u0111\u1ecba ch\u1ec9 \u0111\u00edch v\u00e0 s\u1ed1 c\u1ed5ng (ho\u1eb7c c\u1ed5ng), giao th\u1ee9c m\u1ea1ng.&nbsp;<\/li><li>Ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb c\u00f3 th\u1ec3 bi\u1ebft ai \u0111ang c\u1ed1 g\u1eafng truy c\u1eadp m\u1ea1ng.<\/li><li>Firewall ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng m\u1ed9t Proxy trung gian.<\/li><li>b\u1ea3o v\u1ec7 t\u00e0i nguy\u00ean h\u1ec7 th\u1ed1ng kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda b\u1ea3o m\u1eadt.<\/li><li>C\u00e2n b\u1eb1ng t\u1ea3i: c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nhi\u1ec1u \u0111\u01b0\u1eddng l\u01b0u l\u01b0\u1ee3ng. \u0110\u1ed3ng th\u1eddi, vi\u1ec7c ph\u00e2n b\u1ed5 t\u1ea3i gi\u00fap \u0111\u01b0\u1eddng truy\u1ec1n internet \u1ed5n \u0111\u1ecbnh h\u01a1n r\u1ea5t nhi\u1ec1u.&nbsp;<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span id=\"Phan_loai_va_thanh_phan_cua_Firewall\">Ph\u00e2n lo\u1ea1i v\u00e0 th\u00e0nh ph\u1ea7n c\u1ee7a Firewall<\/span><\/h2>\n\n\n\n<p>Firewall c\u1ea7n ph\u1ea3i c\u1ea5p ph\u00e9p ho\u1eb7c t\u1eeb ch\u1ed1i khi ng\u01b0\u1eddi d\u00f9ng s\u1eed d\u1ee5ng d\u1eef li\u1ec7u k\u1ebft n\u1ed1i m\u1ea1ng. V\u00ed d\u1ee5 l\u00e0, khi b\u1ea1n truy c\u1eadp v\u00e0o b\u1ea5t k\u1ef3 trang web n\u00e0o th\u00ec th\u00f4ng tin \u0111\u00f3 ph\u1ea3i truy\u1ec1n th\u00f4ng qua m\u1ea1ng v\u00e0 \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e9p.<\/p>\n\n\n\n<p>T\u01b0\u1eddng l\u1eeda c\u1ea7n bi\u1ebft s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa l\u01b0u l\u01b0\u1ee3ng h\u1ee3p ph\u00e1p \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp \u1edf tr\u00ean v\u00e0 c\u00e1c lo\u1ea1i l\u01b0u l\u01b0\u1ee3ng \u0111\u1ed9c h\u1ea1i kh\u00e1c.D\u1ef1a v\u00e0o nhu c\u1ea7u c\u1ee7a h\u1ec7 th\u1ed1ng, firewall \u0111\u01b0\u1ee3c chia th\u00e0nh 2 lo\u1ea1i ch\u00ednh bao g\u1ed3m:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span id=\"Personal_Firewallnbsp\">Personal Firewall&nbsp;<\/span><\/h3>\n\n\n\n<p>Personal Firewall &#8211; Lo\u1ea1i n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1ea3o v\u1ec7 m\u00e1y t\u00ednh kh\u00f4ng b\u1ecb truy c\u1eadp. Ngo\u00e0i ra, t\u01b0\u1eddng l\u1eeda c\u00e1 nh\u00e2n c\u00f2n \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p th\u00eam c\u00e1c ch\u1ee9c n\u0103ng nh\u01b0 gi\u00e1m s\u00e1t ph\u1ea7n m\u1ec1m di\u1ec7t virus, ph\u1ea7n m\u1ec1m ch\u1ed1ng x\u00e2m nh\u1eadp \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u. M\u1ed9t s\u1ed1 firewall c\u00e1 nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u01b0: Microsoft Internet Connection Firewall, Symantec Personal Firewall, Cisco Security Agent &#8230; th\u01b0\u1eddng \u0111\u01b0\u1ee3c nh\u00fang trong laptop, PC \u2026<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span id=\"Network_Firewall\">Network Firewall<\/span><\/h3>\n\n\n\n<p>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1ea3o v\u1ec7 m\u00e1y ch\u1ee7 m\u1ea1ng kh\u1ecfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb b\u00ean ngo\u00e0i. Ch\u00fang t\u00f4i c\u00f3 t\u01b0\u1eddng l\u1eeda m\u1ea1ng d\u1ef1a tr\u00ean thi\u1ebft b\u1ecb nh\u01b0 Cisco PIX, Cisco ASA, Juniper NetScreen Firewall, Nokia Firewall, Symantec Enterprise Firewall. Ho\u1eb7c m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 t\u01b0\u1eddng l\u1eeda d\u1ef1a tr\u00ean ph\u1ea7n m\u1ec1m l\u00e0 Check Point Firewall, Microsoft ISA Server, IPTables based Linux.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall3-1024x643.jpg\" alt=\"\" class=\"wp-image-6642\" width=\"768\" srcset=\"https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall3-1024x643.jpg 1024w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall3-300x188.jpg 300w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall3-768x482.jpg 768w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall3-1536x964.jpg 1536w, https:\/\/idconline.vn\/blog\/wp-content\/uploads\/2021\/07\/avt-idc-online-firewall3-2048x1286.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Ca\u0301c loa\u0323i Firewall<\/figcaption><\/figure><\/div>\n\n\n\n<p>=&gt; S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa hai lo\u1ea1i t\u01b0\u1eddng l\u1eeda n\u00e0y l\u00e0 s\u1ed1 l\u01b0\u1ee3ng host \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi t\u01b0\u1eddng l\u1eeda. H\u00e3y nh\u1edb r\u1eb1ng t\u01b0\u1eddng l\u1eeda c\u00e1 nh\u00e2n ch\u1ec9 b\u1ea3o v\u1ec7 m\u1ed9t. M\u00e0 h\u1ec7 th\u1ed1ng t\u01b0\u1eddng l\u1eeda m\u1ea1ng bao g\u1ed3m c\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh sau:&nbsp;<\/p>\n\n\n\n<ul><li>B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn l\u1ecdc g\u00f3i (Packet- Filtering Router)<\/li><li>C\u1ed5ng \u1ee9ng d\u1ee5ng ( L\u00e0 Application-Level Gateway ho\u1eb7c Proxy Server).<\/li><li>C\u1ed5ng m\u1ea1ch (Circuite Level Gateway)<\/li><\/ul>\n\n\n\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 to\u00e0n b\u1ed9 ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 firewall. <a href=\"http:\/\/idconline.shop\">IDC Online<\/a> mong \u0111\u01b0\u1ee3c cung c\u1ea5p cho b\u1ea1n nh\u1eefng th\u00f4ng tin chi ti\u1ebft h\u1eefu \u00edch h\u01a1n n\u1eefa.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-trinh-x\u1eed-ly-nhung wp-block-embed-trinh-x\u1eed-ly-nhung wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"IDC Online - D\u1ecbch v\u1ee5 M\u00e1y ch\u1ee7, Cloud, VPS, Web Hosting\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/4xToNZZLiU8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>M\u1eddi tham kh\u1ea3o D\u1ecbch v\u1ee5 m\u00e1y ch\u1ee7, Cloud, VPS, Web Hosting t\u1ea1i<a href=\"https:\/\/idconline.vn\/\"> IDC Online<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong th\u1eddi \u0111\u1ea1i c\u00f4ng ngh\u1ec7 th\u00f4ng tin ph\u00e1t tri\u1ec3n nh\u01b0 v\u0169 b\u00e3o hi\u1ec7n nay. Vi\u1ec7c s\u1eed d\u1ee5ng v\u00e0 \u0111\u1ea3m b\u1ea3o an to\u00e0n th\u00f4ng tin \u0111\u01b0\u1ee3c \u01b0u ti\u00ean v\u00e0 ch\u00fa tr\u1ecdng h\u01a1n. Tr\u01b0\u1edbc t\u00ecnh h\u00ecnh \u0111\u00f3, Firewall n\u00e0y xu\u1ea5t hi\u1ec7n v\u00e0 nhanh ch\u00f3ng tr\u1edf th\u00e0nh m\u1ed9t gi\u1ea3i ph\u00e1p kh\u00f4ng th\u1ec3 thi\u1ebfu gi\u00fap c\u00e1c c\u00f4ng ty b\u1ea3o [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6641,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[364,366,369,367,365,368],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.10 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Firewall la\u0300 gi\u0300? Filewall du\u0300ng \u0111\u00ea\u0309 la\u0300m gi\u0300? - IDC Online<\/title>\n<meta name=\"description\" content=\"Vi\u1ec7c s\u1eed d\u1ee5ng v\u00e0 \u0111\u1ea3m b\u1ea3o an to\u00e0n th\u00f4ng tin \u0111\u01b0\u1ee3c \u01b0u ti\u00ean v\u00e0 r\u1ea5t \u0111\u01b0\u1ee3c ch\u00fa tr\u1ecdng. 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