{"id":791,"date":"2018-10-08T20:56:57","date_gmt":"2018-10-08T11:56:57","guid":{"rendered":"https:\/\/vongg.com\/?p=791"},"modified":"2018-10-09T11:46:06","modified_gmt":"2018-10-09T02:46:06","slug":"iptables","status":"publish","type":"post","link":"https:\/\/vongg.com\/?p=791","title":{"rendered":"iptables goooooood"},"content":{"rendered":"

https:\/\/blog.csdn.net\/hustsselbj\/article\/details\/45866681<\/p>\n

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\"\"<\/div>\n
\"iptables\u00e5\u008c\u0085\u00e5\u00a4\u0084\u00e7\u0090\u0086\u00e6\u00b5\u0081\u00e7\u00a8\u008b\"<\/div>\n
\"iptables_entables\u00e5\u00a4\u0084\u00e7\u0090\u0086\u00e6\u00b5\u0081\u00e7\u00a8\u008b\u00e5\u009b\u00be\"<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n

http:\/\/man.linuxde.net\/iptables<\/p>\n

goooooood\u00a0 http:\/\/seanlook.com\/2014\/02\/23\/iptables-understand\/<\/p>\n

<\/p>\n

1. netfilter\u4e0eiptables<\/h1>\n

Netfilter\u662f\u7531Rusty Russell\u63d0\u51fa\u7684Linux 2.4\u5185\u6838\u9632\u706b\u5899\u6846\u67b6\uff0c\u8be5\u6846\u67b6\u65e2\u7b80\u6d01\u53c8\u7075\u6d3b\uff0c\u53ef\u5b9e\u73b0\u5b89\u5168\u7b56\u7565\u5e94\u7528\u4e2d\u7684\u8bb8\u591a\u529f\u80fd\uff0c\u5982\u6570\u636e\u5305\u8fc7\u6ee4\u3001\u6570\u636e\u5305\u5904\u7406\u3001\u5730\u5740\u4f2a\u88c5\u3001\u900f\u660e\u4ee3\u7406\u3001\u52a8\u6001\u7f51\u7edc\u5730\u5740\u8f6c\u6362(Network Address Translation\uff0cNAT)\uff0c\u4ee5\u53ca\u57fa\u4e8e\u7528\u6237\u53ca\u5a92\u4f53\u8bbf\u95ee\u63a7\u5236(Media Access Control\uff0cMAC)\u5730\u5740\u7684\u8fc7\u6ee4\u548c\u57fa\u4e8e\u72b6\u6001\u7684\u8fc7\u6ee4\u3001\u5305\u901f\u7387\u9650\u5236\u7b49\u3002Iptables\/Netfilter\u7684\u8fd9\u4e9b\u89c4\u5219\u53ef\u4ee5\u901a\u8fc7\u7075\u6d3b\u7ec4\u5408\uff0c\u5f62\u6210\u975e\u5e38\u591a\u7684\u529f\u80fd\u3001\u6db5\u76d6\u5404\u4e2a\u65b9\u9762\uff0c\u8fd9\u4e00\u5207\u90fd\u5f97\u76ca\u4e8e\u5b83\u7684\u4f18\u79c0\u8bbe\u8ba1\u601d\u60f3\u3002<\/p>\n

Netfilter\u662fLinux\u64cd\u4f5c\u7cfb\u7edf\u6838\u5fc3\u5c42\u5185\u90e8\u7684\u4e00\u4e2a\u6570\u636e\u5305\u5904\u7406\u6a21\u5757\uff0c\u5b83\u5177\u6709\u5982\u4e0b\u529f\u80fd\uff1a<\/p>\n

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  • \u7f51\u7edc\u5730\u5740\u8f6c\u6362(Network Address Translate)<\/li>\n
  • \u6570\u636e\u5305\u5185\u5bb9\u4fee\u6539<\/li>\n
  • \u4ee5\u53ca\u6570\u636e\u5305\u8fc7\u6ee4\u7684\u9632\u706b\u5899\u529f\u80fd<\/li>\n<\/ul>\n

    Netfilter \u5e73\u53f0\u4e2d\u5236\u5b9a\u4e86\u6570\u636e\u5305\u7684\u4e94\u4e2a\u6302\u8f7d\u70b9\uff08Hook Point\uff0c\u6211\u4eec\u53ef\u4ee5\u7406\u89e3\u4e3a\u56de\u8c03\u51fd\u6570\u70b9\uff0c\u6570\u636e\u5305\u5230\u8fbe\u8fd9\u4e9b\u4f4d\u7f6e\u7684\u65f6\u5019\u4f1a\u4e3b\u52a8\u8c03\u7528\u6211\u4eec\u7684\u51fd\u6570\uff0c\u4f7f\u6211\u4eec\u6709\u673a\u4f1a\u80fd\u5728\u6570\u636e\u5305\u8def\u7531\u7684\u65f6\u5019\u6539\u53d8\u5b83\u4eec\u7684\u65b9\u5411\u3001\u5185\u5bb9\uff09\uff0c\u8fd95\u4e2a\u6302\u8f7d\u70b9\u5206\u522b\u662fPRE_ROUTING<\/code>\u3001INPUT<\/code>\u3001OUTPUT<\/code>\u3001FORWARD<\/code>\u3001POST_ROUTING<\/code>\u3002<\/p>\n

    Netfilter \u6240\u8bbe\u7f6e\u7684\u89c4\u5219\u662f\u5b58\u653e\u5728\u5185\u6838\u5185\u5b58\u4e2d\u7684\uff0c\u800c iptables \u662f\u4e00\u4e2a\u5e94\u7528\u5c42\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u5b83\u901a\u8fc7 Netfilter \u653e\u51fa\u7684\u63a5\u53e3\u6765\u5bf9\u5b58\u653e\u5728\u5185\u6838\u5185\u5b58\u4e2d\u7684 XXtables\uff08Netfilter\u7684\u914d\u7f6e\u8868\uff09\u8fdb\u884c\u4fee\u6539\u3002\u8fd9\u4e2aXXtables\u7531\u8868tables<\/code>\u3001\u94fechains<\/code>\u3001\u89c4\u5219rules<\/code>\u7ec4\u6210\uff0ciptables\u5728\u5e94\u7528\u5c42\u8d1f\u8d23\u4fee\u6539\u8fd9\u4e2a\u89c4\u5219\u6587\u4ef6\u3002\u7c7b\u4f3c\u7684\u5e94\u7528\u7a0b\u5e8f\u8fd8\u6709 firewalld \u3002<\/p>\n

    http:\/\/seanlook.com\/2014\/02\/26\/iptables-example\/\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0gooooooooooooooooooood!!!!<\/span><\/p>\n

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    \n\n\n\n
    \n
    -->PREROUTING-->[ROUTE]-->FORWARD-->POSTROUTING--><\/span>\r\n     mangle        |       mangle        ^ mangle<\/span>\r\n      nat          |       filter        |  nat<\/span>\r\n                   |                     |<\/span>\r\n                   |                     |<\/span>\r\n                   v                     |<\/span>\r\n                 INPUT                 OUTPUT<\/span>\r\n                   | mangle              ^ mangle<\/span>\r\n                   | filter              |  nat<\/span>\r\n                   v ------>local------->| filter<\/span><\/pre>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    <\/p>\n
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    \u4ece\u4e0a\u56fe\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u603b\u7ed3\u51fa\u4ee5\u4e0b\u89c4\u5f8b\uff1a<\/p>\n
      \n
    • \u5f53\u4e00\u4e2a\u6570\u636e\u5305\u8fdb\u5165\u7f51\u5361\u65f6\uff0c\u6570\u636e\u5305\u9996\u5148\u8fdb\u5165PREROUTING\u94fe\uff0c\u5728PREROUTING\u94fe\u4e2d\u6211\u4eec\u6709\u673a\u4f1a\u4fee\u6539\u6570\u636e\u5305\u7684DestIP(\u76ee\u7684IP)\uff0c\u7136\u540e\u5185\u6838\u7684\u201d\u8def\u7531\u6a21\u5757\u201d\u6839\u636e\u201d\u6570\u636e\u5305\u76ee\u7684IP\u201d\u4ee5\u53ca\u201d\u5185\u6838\u4e2d\u7684\u8def\u7531\u8868\u201d\u5224\u65ad\u662f\u5426\u9700\u8981\u8f6c\u9001\u51fa\u53bb(\u6ce8\u610f\uff0c\u8fd9\u4e2a\u65f6\u5019\u6570\u636e\u5305\u7684DestIP\u6709\u53ef\u80fd\u5df2\u7ecf\u88ab\u6211\u4eec\u4fee\u6539\u8fc7\u4e86)<\/li>\n
    • \u5982\u679c\u6570\u636e\u5305\u5c31\u662f\u8fdb\u5165\u672c\u673a\u7684(\u5373\u6570\u636e\u5305\u7684\u76ee\u7684IP\u662f\u672c\u673a\u7684\u7f51\u53e3IP)\uff0c\u6570\u636e\u5305\u5c31\u4f1a\u6cbf\u7740\u56fe\u5411\u4e0b\u79fb\u52a8\uff0c\u5230\u8fbeINPUT\u94fe\u3002\u6570\u636e\u5305\u5230\u8fbeINPUT\u94fe\u540e\uff0c\u4efb\u4f55\u8fdb\u7a0b\u90fd\u4f1a-\u6536\u5230\u5b83<\/li>\n
    • \u672c\u673a\u4e0a\u8fd0\u884c\u7684\u7a0b\u5e8f\u4e5f\u53ef\u4ee5\u53d1\u9001\u6570\u636e\u5305\uff0c\u8fd9\u4e9b\u6570\u636e\u5305\u7ecf\u8fc7OUTPUT\u94fe\uff0c\u7136\u540e\u5230\u8fbePOSTROTING\u94fe\u8f93\u51fa(\u6ce8\u610f\uff0c\u8fd9\u4e2a\u65f6\u5019\u6570\u636e\u5305\u7684SrcIP\u6709\u53ef\u80fd\u5df2\u7ecf\u88ab\u6211\u4eec\u4fee\u6539\u8fc7\u4e86)<\/li>\n
    • \u5982\u679c\u6570\u636e\u5305\u662f\u8981\u8f6c\u53d1\u51fa\u53bb\u7684(\u5373\u76ee\u7684IP\u5730\u5740\u4e0d\u518d\u5f53\u524d\u5b50\u7f51\u4e2d)\uff0c\u4e14\u5185\u6838\u5141\u8bb8\u8f6c\u53d1\uff0c\u6570\u636e\u5305\u5c31\u4f1a\u5411\u53f3\u79fb\u52a8\uff0c\u7ecf\u8fc7FORWARD\u94fe\uff0c\u7136\u540e\u5230\u8fbePOSTROUTING\u94fe\u8f93\u51fa(\u9009\u62e9\u5bf9\u5e94\u5b50\u7f51\u7684\u7f51\u53e3\u53d1\u9001\u51fa\u53bb)<\/li>\n<\/ul>\n
      \u6211\u4eec\u5728\u5199Iptables\u89c4\u5219\u7684\u65f6\u5019\uff0c\u8981\u65f6\u523b\u7262\u8bb0\u8fd9\u5f20\u8def\u7531\u6b21\u5e8f\u56fe\uff0c\u6839\u636e\u6240\u5728Hook\u70b9\u7684\u4e0d\u540c\uff0c\u7075\u6d3b\u914d\u7f6e\u89c4\u5219\u3002<\/p>\n
      \n
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      3. iptables\u7f16\u5199\u89c4\u5219<\/h1>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
      <\/p>\n
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      • [-t \u8868\u540d]<\/code>\uff1a\u8be5\u89c4\u5219\u6240\u64cd\u4f5c\u7684\u54ea\u4e2a\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528filter\u3001nat\u7b49\uff0c\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u5219\u9ed8\u8ba4\u4e3afilter<\/li>\n
      • -A<\/code>\uff1a\u65b0\u589e\u4e00\u6761\u89c4\u5219\uff0c\u5230\u8be5\u89c4\u5219\u94fe\u5217\u8868\u7684\u6700\u540e\u4e00\u884c<\/li>\n
      • -I<\/code>\uff1a\u63d2\u5165\u4e00\u6761\u89c4\u5219\uff0c\u539f\u672c\u8be5\u4f4d\u7f6e\u4e0a\u7684\u89c4\u5219\u4f1a\u5f80\u540e\u987a\u5e8f\u79fb\u52a8\uff0c\u6ca1\u6709\u6307\u5b9a\u7f16\u53f7\u5219\u4e3a1<\/li>\n
      • -D<\/code>\uff1a\u4ece\u89c4\u5219\u94fe\u4e2d\u5220\u9664\u4e00\u6761\u89c4\u5219\uff0c\u8981\u4e48\u8f93\u5165\u5b8c\u6574\u7684\u89c4\u5219\uff0c\u6216\u8005\u6307\u5b9a\u89c4\u5219\u7f16\u53f7\u52a0\u4ee5\u5220\u9664<\/li>\n
      • -R<\/code>\uff1a\u66ff\u6362\u67d0\u6761\u89c4\u5219\uff0c\u89c4\u5219\u66ff\u6362\u4e0d\u4f1a\u6539\u53d8\u987a\u5e8f\uff0c\u800c\u4e14\u5fc5\u987b\u6307\u5b9a\u7f16\u53f7\u3002<\/li>\n
      • -P<\/code>\uff1a\u8bbe\u7f6e\u67d0\u6761\u89c4\u5219\u94fe\u7684\u9ed8\u8ba4\u52a8\u4f5c<\/li>\n
      • -nL<\/code>\uff1a-L<\/code>\u3001-n<\/code>\uff0c\u67e5\u770b\u5f53\u524d\u8fd0\u884c\u7684\u9632\u706b\u5899\u89c4\u5219\u5217\u8868<\/li>\n
      • chain\u540d<\/code>\uff1a\u6307\u5b9a\u89c4\u5219\u8868\u7684\u54ea\u4e2a\u94fe\uff0c\u5982INPUT\u3001OUPUT\u3001FORWARD\u3001PREROUTING\u7b49<\/li>\n
      • [\u89c4\u5219\u7f16\u53f7]<\/code>\uff1a\u63d2\u5165\u3001\u5220\u9664\u3001\u66ff\u6362\u89c4\u5219\u65f6\u7528\uff0c--line-numbers<\/code>\u663e\u793a\u53f7\u7801<\/li>\n
      • [-i|o \u7f51\u5361\u540d\u79f0]<\/code>\uff1ai\u662f\u6307\u5b9a\u6570\u636e\u5305\u4ece\u54ea\u5757\u7f51\u5361\u8fdb\u5165\uff0co\u662f\u6307\u5b9a\u6570\u636e\u5305\u4ece\u54ea\u5757\u7f51\u5361\u8f93\u51fa<\/li>\n
      • [-p \u534f\u8bae\u7c7b\u578b]<\/code>\uff1a\u53ef\u4ee5\u6307\u5b9a\u89c4\u5219\u5e94\u7528\u7684\u534f\u8bae\uff0c\u5305\u542btcp\u3001udp\u548cicmp\u7b49<\/li>\n
      • [-s \u6e90IP\u5730\u5740]<\/code>\uff1a\u6e90\u4e3b\u673a\u7684IP\u5730\u5740\u6216\u5b50\u7f51\u5730\u5740<\/li>\n
      • [--sport \u6e90\u7aef\u53e3\u53f7]<\/code>\uff1a\u6570\u636e\u5305\u7684IP\u7684\u6e90\u7aef\u53e3\u53f7<\/li>\n
      • [-d\u76ee\u6807IP\u5730\u5740]<\/code>\uff1a\u76ee\u6807\u4e3b\u673a\u7684IP\u5730\u5740\u6216\u5b50\u7f51\u5730\u5740<\/li>\n
      • [--dport\u76ee\u6807\u7aef\u53e3\u53f7]<\/code>\uff1a\u6570\u636e\u5305\u7684IP\u7684\u76ee\u6807\u7aef\u53e3\u53f7<\/li>\n
      • -m<\/code>\uff1aextend matches\uff0c\u8fd9\u4e2a\u9009\u9879\u7528\u4e8e\u63d0\u4f9b\u66f4\u591a\u7684\u5339\u914d\u53c2\u6570\uff0c\u5982\uff1a\n
          \n
        • -m state \u2013state ESTABLISHED,RELATED<\/li>\n
        • -m tcp \u2013dport 22<\/li>\n
        • -m multiport \u2013dports 80,8080<\/li>\n
        • -m icmp \u2013icmp-type 8<\/li>\n<\/ul>\n<\/li>\n
        • <-j \u52a8\u4f5c><\/code>\uff1a\u5904\u7406\u6570\u636e\u5305\u7684\u52a8\u4f5c\uff0c\u5305\u62ecACCEPT\u3001DROP\u3001REJECT\u7b49<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/figure>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
          \n
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           <\/p>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
          https:\/\/blog.csdn.net\/hustsselbj\/article\/details\/458666 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[27],"tags":[],"_links":{"self":[{"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/posts\/791"}],"collection":[{"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vongg.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=791"}],"version-history":[{"count":15,"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/posts\/791\/revisions"}],"predecessor-version":[{"id":813,"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/posts\/791\/revisions\/813"}],"wp:attachment":[{"href":"https:\/\/vongg.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vongg.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vongg.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}