{"id":426,"date":"2016-09-24T20:09:10","date_gmt":"2016-09-24T13:09:10","guid":{"rendered":"https:\/\/engisv.info\/?p=426"},"modified":"2016-09-24T20:09:10","modified_gmt":"2016-09-24T13:09:10","slug":"pfsense-firewall-firewall-rules-tong-quan","status":"publish","type":"post","link":"https:\/\/www.engisv.info\/?p=426","title":{"rendered":"Pfsense Firewall &#8211; Firewall Rules t\u1ed5ng quan"},"content":{"rendered":"<p>T\u00ednh n\u0103ng Firewall l\u00e0 t\u00ednh n\u0103ng quan trong c\u1ee7a Pfsense, t\u00ednh n\u0103ng n\u00e0y ho\u1ea1t \u0111\u1ed9ng th\u00f4ng qua vi\u1ec7c thi\u1ebft l\u1eadp c\u00e1c Firewall Rules. T\u00ednh n\u0103ng n\u00e0y gi\u00fap ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb thi\u1ebft l\u1eadp c\u00e1c, ch\u00ednh s\u00e1ch qu\u1ea3n l\u00fd truy c\u1eadp ng\u01b0\u1eddi d\u00f9ng, \u0111i\u1ec1u ch\u1ec9nh h\u01b0\u1edbng c\u00e1c g\u00f3i tin trong h\u1ec7 th\u1ed1ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.engisv.info\/Network\/firewall_proxy\/pfsense\/firewall_rule\/Firewall_Rules\/Pfsense%20firewall.jpg\" alt=\"\" width=\"492\" height=\"428\" \/><\/p>\n<p>M\u1eb7c \u0111\u1ecbnh, n\u1ebfu kh\u00f4ng thi\u1ebft l\u1eadp b\u1ea5t c\u1ee9 rule n\u00e0o tr\u00ean Firewall Rules, Pfsense s\u1ebd ch\u1eb7n t\u1ea5t c\u1ea3 c\u00e1c c\u00e1c traffic \u0111i \u0111\u1ebfn v\u00e0 \u0111i ngang qua, nh\u01b0ng t\u1eeb ch\u00ednh m\u00e1y Pfsense c\u00f3 th\u1ec3 \u0111i t\u1ea5t c\u1ea3 c\u00e1c h\u01b0\u1edbng c\u00f3 k\u1ebft n\u1ed1i \u00a0v\u1edbi n\u00f3.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.engisv.info\/Network\/firewall_proxy\/pfsense\/firewall_rule\/Firewall_Rules\/Firewall%20rules%20(4).png\" alt=\"\" width=\"472\" height=\"278\" \/><\/p>\n<p>Khi ch\u00fang ta c\u00e0i \u0111\u1eb7t, Pfsense s\u1ebd y\u00eau c\u1ea7u thi\u1ebft l\u1eadp c\u00e1c interface giao ti\u1ebfp WAN v\u00e0 LAN (<strong><a href=\"https:\/\/www.engisv.info\/?p=182\">k\u1ec3 c\u1ea3 trong tr\u01b0\u1eddng h\u1ee3p thi\u1ebft l\u1eadp VLAN<\/a><\/strong>), \u1edf tr\u00ean hai giao ti\u1ebfp nay s\u1ebd \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp c\u00e1c ch\u00ednh s\u00e1ch kh\u00e1c nhau. \u0110\u1ed1i v\u1edbi WAN, h\u1ec7 th\u1ed1ng s\u1ebd nh\u1eadn di\u1ec7n \u0111\u00f3 l\u00e0 h\u01b0\u1edbng k\u1ebft n\u1ed1i internet, do m\u1eb7c \u0111\u1ecbnh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi ch\u1ebf \u0111\u1ed9 NAT outbound, n\u00ean Pfsense ch\u1ec9 cho ph\u00e9p k\u1ebft n\u1ed1i internet t\u1eeb c\u1ed5ng n\u00e0y, c\u00e1c d\u1ea1ng traffic c\u00f2n l\u1ea1i s\u1ebd b\u1ecb ch\u1eb7n, tr\u1eeb khi ch\u00fang ta m\u1edf rules cho ph\u00e9p d\u1ecbch v\u1ee5 \u0111i qua.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.engisv.info\/Network\/firewall_proxy\/pfsense\/firewall_rule\/Firewall_Rules\/Firewall%20rules%20(1).png\" alt=\"\" width=\"664\" height=\"227\" \/><\/p>\n<p>\u0110\u1ed1i v\u1edbi k\u1ebft n\u1ed1i LAN, Pfsense m\u1eb7c \u0111\u1ecbnh s\u1ebd t\u1ef1 t\u1ea1o rule cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng k\u1ebft n\u1ed1i \u0111\u1ebfn giao di\u1ec7n qu\u1ea3n tr\u1ecb c\u1ee7a Pfsense v\u00e0 m\u1ed9t rules cho ph\u00e9p t\u1ea5t c\u1ea3 c\u00e1c traffic k\u1ebft n\u1ed1i \u0111\u1ebfn internet v\u00e0 c\u00e1c interface kh\u00e1c n\u1ebfu c\u00f3 tr\u00ean Pfsense.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.engisv.info\/Network\/firewall_proxy\/pfsense\/firewall_rule\/Firewall_Rules\/Firewall%20rules%20(2).png\" alt=\"\" width=\"693\" height=\"229\" \/><\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c interface c\u00f2n l\u1ea1i (OPT), c\u00e1c interface n\u00e0y kh\u00f4ng \u0111\u01b0\u01a1c thi\u1ebft l\u1eadp rules , n\u00ean t\u1ea5t c\u1ea3 c\u00e1c traffic t\u1eeb client k\u1ebft n\u1ed1i \u0111\u1ebfn c\u00e1c interface n\u00e0y s\u1ebd b\u1ecb ch\u1eb7n, cho \u0111\u1ebfn khi ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb m\u1edf c\u00e1c rules cho c\u00e1c traffic \u0111i qua.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.engisv.info\/Network\/firewall_proxy\/pfsense\/firewall_rule\/Firewall_Rules\/Firewall%20rules%20(3).png\" alt=\"\" width=\"685\" height=\"220\" \/><\/p>\n<p>Trong v\u1ea5n \u0111\u1ec1 thi\u1ebft l\u1eadp c\u00e1c Firewall Rules, ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp rule tr\u00ean t\u1eebng interface ho\u1eb7c Rule tr\u00ean Floating. Rule tr\u00ean interface gi\u00fap ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp c\u00e1c rules chi ti\u1ebft cho t\u1eebng m\u1ea1ng thu\u1ed9c interface \u0111\u00f3.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.engisv.info\/Network\/firewall_proxy\/pfsense\/firewall_rule\/Firewall_Rules\/Firewall%20rules%20(7).png\" alt=\"\" width=\"491\" height=\"321\" \/><\/p>\n<p>Foating rules, \u0111\u00e2y l\u00e0 ph\u1ea7n n\u00e2ng cao c\u1ee7a Firewall rules, m\u1ed9t rules tr\u00ean ph\u1ea7n n\u00e0y c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng cho m\u1ed9t interface, ho\u1eb7c \u0111\u01b0\u1ee3c g\u00e1n tr\u00ean nhi\u1ec1u interface s\u1eed d\u1ee5ng chung rule, vi\u1ec7c d\u00f9ng chung m\u1ed9t Firewall Rules s\u1ebd gi\u00fap gi\u1ea3m b\u1edbt c\u00e1c rules, l\u00e0m cho Firewall server ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 v\u00e0 ti\u1ebft ki\u1ec7m t\u00e0i nguy\u00ean ph\u1ea7n c\u1ee9ng. Floating rules cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng m\u1edf r\u1ed9ng h\u01a1n so v\u1edbi inerface rules.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/img.engisv.info\/Network\/firewall_proxy\/pfsense\/firewall_rule\/Firewall_Rules\/Firewall%20rules%20(6).png\" alt=\"\" width=\"719\" height=\"209\" \/><\/p>\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 c\u00e1i nh\u00ecn t\u1ed5ng quan v\u1ec1 Firewall rules c\u1ee7a Pfsense, cung c\u1ea5p m\u1ed9t c\u00e1i nh\u00ecn chung v\u1ec1 vi\u1ec7c thi\u1ebft Firewall rules. Ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u ph\u1ea7n <a href=\"https:\/\/www.engisv.info\/?p=977\" target=\"_blank\">Advaced Firewall Rule v\u00e0 thi\u1ebft l\u1eadp c\u00e1c ch\u00ednh s\u00e1ch trong ph\u1ea7n ti\u1ebfp theo<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u00ednh n\u0103ng Firewall l\u00e0 t\u00ednh n\u0103ng quan trong c\u1ee7a Pfsense, t\u00ednh n\u0103ng n\u00e0y ho\u1ea1t \u0111\u1ed9ng th\u00f4ng qua vi\u1ec7c thi\u1ebft l\u1eadp c\u00e1c Firewall Rules. T\u00ednh n\u0103ng n\u00e0y gi\u00fap ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb thi\u1ebft l\u1eadp c\u00e1c, ch\u00ednh s\u00e1ch qu\u1ea3n l\u00fd truy c\u1eadp ng\u01b0\u1eddi d\u00f9ng, \u0111i\u1ec1u ch\u1ec9nh h\u01b0\u1edbng c\u00e1c g\u00f3i tin trong h\u1ec7 th\u1ed1ng. M\u1eb7c \u0111\u1ecbnh, n\u1ebfu kh\u00f4ng thi\u1ebft l\u1eadp b\u1ea5t c\u1ee9 rule n\u00e0o tr\u00ean Firewall Rules, Pfsense s\u1ebd ch\u1eb7n t\u1ea5t c\u1ea3 c\u00e1c c\u00e1c traffic \u0111i \u0111\u1ebfn v\u00e0 \u0111i ngang qua, nh\u01b0ng t\u1eeb ch\u00ednh m\u00e1y Pfsense c\u00f3 th\u1ec3 \u0111i t\u1ea5t c\u1ea3 c\u00e1c h\u01b0\u1edbng c\u00f3&hellip;<\/p>\n","protected":false},"author":2,"featured_media":260,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"footnotes":""},"categories":[4,5],"tags":[38,54],"class_list":["post-426","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mang","category-firewall-proxy","tag-firewall","tag-pfsense"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pfsense Firewall - Firewall Rules t\u1ed5ng quan - EngISV<\/title>\n<meta name=\"description\" content=\"Gi\u1edbi thi\u1ec7u t\u1ed5ng quan v\u00e0 c\u00e1ch d\u00f9ng Firewall Rules, interface rules, floating rules, c\u00e1c Firewall Rules m\u1eb7c \u0111\u1ecbnh tr\u00ean Pfsense\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.engisv.info\/?p=426\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pfsense Firewall - Firewall Rules t\u1ed5ng quan - EngISV\" \/>\n<meta property=\"og:description\" content=\"Gi\u1edbi thi\u1ec7u t\u1ed5ng quan v\u00e0 c\u00e1ch d\u00f9ng Firewall Rules, interface rules, floating rules, c\u00e1c Firewall Rules m\u1eb7c \u0111\u1ecbnh tr\u00ean Pfsense\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.engisv.info\/?p=426\" \/>\n<meta property=\"og:site_name\" content=\"EngISV\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/engisv\" \/>\n<meta property=\"article:published_time\" content=\"2016-09-24T13:09:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.engisv.info\/wp-content\/uploads\/2015\/01\/PFSense-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"hoanghiepktv\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"hoanghiepktv\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.engisv.info\\\/?p=426#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.engisv.info\\\/?p=426\"},\"author\":{\"name\":\"hoanghiepktv\",\"@id\":\"https:\\\/\\\/www.engisv.info\\\/#\\\/schema\\\/person\\\/dcbab2ddc35f4c71f45c7e13f36367bf\"},\"headline\":\"Pfsense Firewall &#8211; 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