{"id":5918,"date":"2023-09-18T15:46:20","date_gmt":"2023-09-18T07:46:20","guid":{"rendered":"https:\/\/www.zhidianwl.net\/zhidianwl\/?p=5918"},"modified":"2023-09-18T15:46:20","modified_gmt":"2023-09-18T07:46:20","slug":"linuxnetfilter%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e6%9c%89%e4%bb%80%e4%b9%88%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.zhidianwl.net\/zhidianwl\/2023\/09\/18\/linuxnetfilter%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e6%9c%89%e4%bb%80%e4%b9%88%e7%94%a8%ef%bc%9f\/","title":{"rendered":"linuxnetfilter\u662f\u4ec0\u4e48\uff1f\u6709\u4ec0\u4e48\u7528\uff1f"},"content":{"rendered":"<p>Linux Netfilter\u662f\u4e00\u4e2a\u5185\u6838\u7ea7\u522b\u7684\u7f51\u7edc\u5305\u8fc7\u6ee4\u6846\u67b6\uff0c\u5b83\u5141\u8bb8\u7ba1\u7406\u5458\u901a\u8fc7\u4e00\u7cfb\u5217\u7684\u89c4\u5219\u6765\u63a7\u5236\u7f51\u7edc\u6d41\u91cf\u7684\u4f20\u8f93\u3002Netfilter\u7684\u6838\u5fc3\u662fiptables\u547d\u4ee4\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u5355\u800c\u5f3a\u5927\u7684\u65b9\u5f0f\u6765\u914d\u7f6eNetfilter\u89c4\u5219\u3002\u672c\u6587\u5c06\u4ecb\u7ecdNetfilter\u7684\u539f\u7406\u548c\u5982\u4f55\u4f7f\u7528iptables\u6765\u914d\u7f6e\u89c4\u5219\u3002<\/p>\n<p>Netfilter\u7684\u539f\u7406<\/p>\n<p>Netfilter\u662f\u4e00\u4e2a\u5185\u6838\u6a21\u5757\uff0c\u5b83\u88ab\u8bbe\u8ba1\u6210\u4e00\u4e2a\u7f51\u7edc\u5305\u8fc7\u6ee4\u5668\u3002\u5f53\u4e00\u4e2a\u7f51\u7edc\u5305\u5230\u8fbeLinux\u7cfb\u7edf\u65f6\uff0c\u5b83\u9996\u5148\u88ab\u9001\u5230Netfilter\u6846\u67b6\u5904\u7406\u3002Netfilter\u6846\u67b6\u5305\u542b\u4e00\u7cfb\u5217\u7684\u94a9\u5b50\u51fd\u6570\uff0c\u8fd9\u4e9b\u51fd\u6570\u5141\u8bb8\u7ba1\u7406\u5458\u5728\u7f51\u7edc\u5305\u7ecf\u8fc7\u4e0d\u540c\u7684\u5904\u7406\u9636\u6bb5\u65f6\u63d2\u5165\u81ea\u5b9a\u4e49\u7684\u5904\u7406\u7a0b\u5e8f\u3002\u6bcf\u4e2a\u94a9\u5b50\u51fd\u6570\u90fd\u5bf9\u5e94\u4e00\u4e2a\u7279\u5b9a\u7684\u5904\u7406\u9636\u6bb5\uff0c\u5982\u56fe\u6240\u793a\uff1a<\/p>\n<p>![Netfilter Hooks](https:\/\/www.linuxjournal.com\/sites\/default\/files\/styles\/max_1300x1300\/public\/linuxjournal.com\/files\/iptables-1.png)<\/p>\n<p>\u6bcf\u4e2a\u94a9\u5b50\u51fd\u6570\u90fd\u63a5\u6536\u4e00\u4e2a\u7f51\u7edc\u5305\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u503c\uff0c\u7528\u4e8e\u6307\u793aNetfilter\u6846\u67b6\u5982\u4f55\u5904\u7406\u8be5\u5305\u3002\u5982\u679c\u8fd4\u56deNF_ACCEPT\uff0c\u5219\u8868\u793a\u5141\u8bb8\u8be5\u5305\u901a\u8fc7<a href=\"https:\/\/exe.yimenapp.com\/tool-1524.html\">\u62d6\u62fd\u7f51\u9875\u5236\u4f5c\u8f6f\u4ef6<\/a>\uff1b\u5982\u679c\u8fd4\u56deNF_DROP\uff0c\u5219\u8868\u793a\u4e22\u5f03\u8be5\u5305\uff1b\u5982\u679c\u8fd4\u56deNF_QUEUE\uff0c\u5219\u8868\u793a\u5c06\u8be5\u5305\u53d1\u9001\u5230\u7528\u6237\u7a7a\u95f4\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<p>iptables\u547d\u4ee4<\/p>\n<p>iptables\u662f\u4e00\u4e2a\u7528\u6237\u7a7a\u95f4\u7684\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u5b83\u5141\u8bb8\u7ba1\u7406\u5458\u914d\u7f6eNetfilter\u89c4\u5219\u3002iptables\u547d\u4ee4\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<p>&#8220;`<\/p>\n<p>iptables [-t table]  [<a href=\"https:\/\/exe.yimenapp.com\/tool-2107.html\">\u6587\u4ef6\u5939\u8f6cexe<\/a>chain] [options]<\/p>\n<p><p>&#8220;`<\/p>\n<p>\u5176\u4e2d\uff0ctable\u53c2\u6570\u7528\u4e8e\u6307\u5b9a\u8981\u64cd\u4f5c\u7684\u8868\uff0c\u5982filter\u3001nat\u3001mangle\u7b49\uff1bcommand\u53c2\u6570\u7528\u4e8e\u6307\u5b9a\u8981\u6267\u884c\u7684\u547d\u4ee4\uff0c\u5982-A\u3001-D\u3001-I\u7b49\uff1bchain\u53c2\u6570\u7528\u4e8e\u6307\u5b9a\u8981\u64cd\u4f5c\u7684\u94fe\uff0c\u5982INPUT\u3001FORWARD\u3001OUTPUT\u7b49\uff1boptions\u53c2\u6570\u7528\u4e8e\u4f20\u9012\u4e00\u4e9b\u9644\u52a0\u53c2\u6570\uff0c\u5982\u89c4\u5219\u6761\u4ef6\u3001\u76ee\u6807\u5730\u5740\u7b49\u3002<\/p>\n<p>iptables\u547d\u4ee4\u652f\u6301\u591a\u79cd\u4e0d\u540c\u7684\u547d\u4ee4\uff0c\u5982<\/p>\n<p><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/i.cdn.yimenapp.com\/2023-03\/20\/16\/02545564185.jpg\" \/><\/figure>\n<\/p>\n<p>\u4e0b\u8868\u6240\u793a\uff1a<\/p>\n<p>| \u547d\u4ee4 | \u8bf4\u660e |<\/p>\n<p>| &#8212; | &#8212; |<\/p>\n<p>| -A | \u5728\u6307\u5b9a\u94fe\u7684\u672b\u5c3e\u6dfb\u52a0\u4e00\u6761\u89c4\u5219 |<\/p>\n<p>| -D | \u4ece\u6307\u5b9a\u94fe\u4e2d\u5220\u9664\u4e00\u6761\u89c4\u5219 |<\/p>\n<p>| -I | \u5728\u6307\u5b9a\u94fe\u7684\u5f00\u5934\u63d2\u5165\u4e00\u6761\u89c4\u5219 |<\/p>\n<p>| -R | \u66ff\u6362\u6307\u5b9a\u94fe\u4e2d\u7684\u4e00\u6761\u89c4\u5219 |<\/p>\n<p>| -L | \u5217\u51fa\u6307\u5b9a\u94fe\u4e2d\u7684\u6240\u6709\u89c4\u5219 |<\/p>\n<p>| -F | \u6e05\u7a7a\u6307\u5b9a\u94fe\u4e2d\u7684\u6240\u6709\u89c4\u5219 |<\/p>\n<p>| -Z | \u5c06\u6307\u5b9a\u94fe\u4e2d\u6240\u6709\u89c4\u5219\u7684\u8ba1\u6570\u5668\u6e05\u96f6 |<\/p>\n<p>| -P | \u8bbe\u7f6e\u6307\u5b9a\u94fe\u7684\u9ed8\u8ba4\u7b56\u7565 |<\/p>\n<p>\u9664\u4e86\u57fa\u672c\u547d\u4ee4\u5916\uff0ciptables\u8fd8\u652f\u6301\u4e00\u4e9b\u9ad8\u7ea7\u9009\u9879\uff0c\u5982\u6761\u4ef6\u5339\u914d\u3001\u76ee\u6807\u5730\u5740\u8f6c\u6362\u7b49\u3002\u8fd9\u4e9b\u9009\u9879\u53ef\u4ee5\u5e2e\u52a9\u7ba1\u7406\u5458\u66f4\u7cbe\u7ec6\u5730\u8c03\u6574Netfilter\u89c4\u5219\u3002<\/p>\n<p>\u603b\u7ed3<\/p>\n<p>Netfilter\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u7f51\u7edc\u5305\u8fc7\u6ee4\u6846\u67b6\uff0c\u5b83\u5141\u8bb8\u7ba1\u7406\u5458\u901a\u8fc7\u4e00\u7cfb\u5217\u7684\u89c4\u5219\u6765\u63a7\u5236\u7f51\u7edc\u6d41\u91cf\u7684\u4f20\u8f93\u3002iptables\u662f\u4e00\u4e2a\u5e38\u7528\u7684\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u5355\u800c\u5f3a\u5927\u7684\u65b9\u5f0f\u6765\u914d\u7f6eNetfilter\u89c4\u5219\u3002\u638c\u63e1Netfilter\u548ciptables\u7684\u4f7f\u7528\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7ba1\u7406\u5458\u66f4\u597d\u5730\u4fdd\u62a4Linux\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux Netfilter\u662f\u4e00\u4e2a\u5185\u6838\u7ea7\u522b\u7684\u7f51\u7edc\u5305\u8fc7\u6ee4\u6846\u67b6\uff0c\u5b83\u5141\u8bb8\u7ba1\u7406\u5458\u901a\u8fc7\u4e00\u7cfb\u5217\u7684\u89c4\u5219\u6765\u63a7\u5236\u7f51\u7edc\u6d41\u91cf\u7684\u4f20\u8f93\u3002Netfilter\u7684\u6838\u5fc3\u662fiptables\u547d\u4ee4\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u5355\u800c\u5f3a\u5927\u7684\u65b9\u5f0f\u6765\u914d\u7f6eNe<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[1899,43,849,10857,1257],"topic":[],"class_list":["post-5918","post","type-post","status-publish","format-standard","hentry","category-zhuomianruanjian","tag-linux","tag-43","tag-849","tag-10857","tag-1257"],"_links":{"self":[{"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/posts\/5918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/comments?post=5918"}],"version-history":[{"count":0,"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/posts\/5918\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/media?parent=5918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/categories?post=5918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/tags?post=5918"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.zhidianwl.net\/zhidianwl\/wp-json\/wp\/v2\/topic?post=5918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}