{"id":3161,"date":"2019-04-08T18:10:03","date_gmt":"2019-04-08T09:25:03","guid":{"rendered":"https:\/\/www.inforsec.org\/wp\/?p=3161"},"modified":"2019-04-08T18:16:41","modified_gmt":"2019-04-08T09:31:41","slug":"%e8%b0%81%e5%8a%ab%e6%8c%81%e4%ba%86%e6%88%91%e7%9a%84dns%ef%bc%9a%e5%85%a8%e7%90%83%e5%9f%9f%e5%90%8d%e8%a7%a3%e6%9e%90%e8%b7%af%e5%be%84%e5%8a%ab%e6%8c%81%e6%b5%8b%e9%87%8f%e4%b8%8e%e5%88%86","status":"publish","type":"post","link":"http:\/\/202.112.238.40\/wp\/?p=3161","title":{"rendered":"\u8c01\u52ab\u6301\u4e86\u6211\u7684DNS\uff1a\u5168\u7403\u57df\u540d\u89e3\u6790\u8def\u5f84\u52ab\u6301\u6d4b\u91cf\u4e0e\u5206\u6790"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u3000\u3000\u672c\u8bba\u6587\u4e3a\u201cWho Is Answering My Queries: Understanding and Characterizing Interception of the DNS Resolution Path\u201d[1]\uff0c\u53d1\u8868\u4e8eUSENIX Security 2018\uff08\u7f51\u7edc\u5b89\u5168\u9886\u57df\u56fd\u9645\u56db\u5927\u9876\u7ea7\u5b66\u672f\u4f1a\u8bae\u4e4b\u4e00\uff09\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u8bba\u6587\u4f5c\u8005\uff1a\u5218\u4fdd\u541b\uff0c\u9646\u8d85\u9038\uff0c\u6bb5\u6d77\u65b0\uff0c\u5218\u83b9\uff08\u6e05\u534e\u5927\u5b66\uff09\uff1b\u674e\u6d32\uff08IEEE \u4f1a\u5458\uff09\uff1b\u90dd\u53cc\uff08\u5fb7\u514b\u8428\u65af\u5dde\u5927\u5b66\u8fbe\u62c9\u65af\u5206\u6821\uff09\uff1b\u6768\u73c9\uff08\u590d\u65e6\u5927\u5b66\uff09\u3002<\/p>\n\n\n\n<p 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class=\"wp-block-paragraph\">\u3000\u3000<strong>\u4e3b\u8981\u7814\u7a76\u7ed3\u8bba<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u30001.  \u52ab\u6301\u7684\u89c4\u6a21\uff1a\u5728\u5168\u74033047\u4e2a\u81ea\u6cbb\u57df\u4e2d\uff0c\u6211\u4eec\u5728259\u4e2a\u81ea\u6cbb\u57df\u5185\u53d1\u73b0\u4e86DNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\u73b0\u8c61\u3002\u7279\u522b\u662f\u5728\u4e2d\u56fd\uff0c\u8fd1\u4e09\u6210\u53d1\u5f80\u8c37\u6b4c\u516c\u5171DNS\u670d\u52a1\u5668\u7684UDP\u6d41\u91cf\u88ab\u52ab\u6301\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u30002.  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class=\"wp-block-paragraph\">\u3000\u3000\u6211\u4eec\u9996\u5148\u9610\u8ff0\u6240\u5173\u6ce8\u7684\u5a01\u80c1\u6a21\u578b\u3002\u90e8\u5206\u7f51\u7edc\u7528\u6237\u53ef\u80fd\u9009\u62e9\u4f7f\u7528\u516c\u5171DNS\u670d\u52a1\u5668\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u5176DNS\u89e3\u6790\u8def\u5f84\u5982\u56fe\u4e00\u84dd\u7ebf\u6240\u793a\u3002\u540c\u65f6\uff0c\u6211\u4eec\u5047\u8bbe\u8def\u5f84\u4e0a\u7684\u67d0\u4e9b\u8bbe\u5907\u53ef\u80fd\u4f1a\u76d1\u63a7\u7528\u6237\u7684DNS\u8bf7\u6c42\u6d41\u91cf\uff0c\u5e76\u4e14\u80fd\u591f\u52ab\u6301\u548c\u64cd\u7eb5\u7528\u6237\u7684DNS\u8bf7\u6c42\u3002\u4f8b\u5982\uff0c\u5c06\u6ee1\u8db3\u9884\u8bbe\u6761\u4ef6\u7684DNS\u8bf7\u6c42\u8f6c\u53d1\u5230\u4e2d\u95f4\u76d2\u5b50\uff08Middlebox\uff09\uff0c\u5e76\u4f7f\u7528\u5176\u4ed6\u66ff\u4ee3\u7684DNS\u670d\u52a1\u5668\uff08Alternative resolver\uff09\u5904\u7406\u7528\u6237\u7684DNS\u8bf7\u6c42\uff1b\u6700\u7ec8\uff0c\u4e2d\u95f4\u76d2\u5b50\u901a\u8fc7\u4f2a\u9020IP\u6e90\u5730\u5740\u7684\u65b9\u5f0f\u5c06DNS\u5e94\u7b54\u5305\u53d1\u5f80\u7ec8\u7aef\u7528\u6237\uff0c\u6b64\u65f6\u7684\u89e3\u6790\u8def\u5f84\u5982\u56fe\u4e00\u7ea2\u7ebf\u6240\u793a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"479\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165623-1024x479.jpg\" alt=\"\" class=\"wp-image-3163\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165623-1024x479.jpg 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165623-300x140.jpg 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165623-768x359.jpg 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165623-250x117.jpg 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165623-150x70.jpg 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165623.jpg 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\n\n\u3000\u56fe1 \u5a01\u80c1\u6a21\u578b\u793a\u610f\n\n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u901a\u8fc7\u5bf9DNS\u6570\u636e\u5305\u201c\u8bf7\u6c42\u9636\u6bb5\u201d\u4e2d\u7684\u89e3\u6790\u8def\u5f84\u8fdb\u884c\u5212\u5206\uff0c\u6211\u4eec\u5c06DNS\u89e3\u6790\u8def\u5f84\u5206\u4e3a\u56db\u7c7b\u3002\u9996\u5148\u662f\u6b63\u5e38\u7684DNS\u89e3\u6790\u8def\u5f84\uff08Normal resolution\uff09\uff0c\u7528\u6237\u7684DNS\u8bf7\u6c42\u53ea\u5230\u8fbe\u6307\u5b9a\u7684\u516c\u5171DNS\u670d\u52a1\u5668\uff1b\u6b64\u65f6\uff0c\u6743\u5a01\u670d\u52a1\u5668\u5e94\u5f53\u53ea\u770b\u5230\u4e00\u4e2a\u6765\u81ea\u516c\u5171\u670d\u52a1\u5668\u7684\u8bf7\u6c42\u3002\u5269\u4e0b\u4e09\u7c7b\u5747\u5c5e\u4e8eDNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\u3002\u7b2c\u4e00\u7c7bDNS\u8def\u5f84\u52ab\u6301\u65b9\u6cd5\u662f\u8bf7\u6c42\u8f6c\u53d1\uff08Request redirection\uff09\uff0c\u7528\u6237\u7684DNS\u8bf7\u6c42\u5c06\u76f4\u63a5\u88ab\u91cd\u5b9a\u5411\u5230\u5176\u4ed6\u7684\u670d\u52a1\u5668\uff0c\u89e3\u6790\u8def\u5f84\u5982\u56fe\u4e8c\u7ea2\u7ebf\u6240\u793a\uff1b\u6b64\u65f6\uff0c\u6743\u5a01\u670d\u52a1\u5668\u53ea\u6536\u5230\u6765\u81ea\u8fd9\u4e2a\u670d\u52a1\u5668\u7684\u8bf7\u6c42\uff0c\u7528\u6237\u6307\u5b9a\u7684\u516c\u5171DNS\u670d\u52a1\u5668\u5b8c\u5168\u88ab\u6392\u9664\u5728\u5916\u3002\u7b2c\u4e8c\u7c7b\u65b9\u6cd5\u662f\u8bf7\u6c42\u590d\u5236\uff08Request 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responding\uff09\uff0c\u7528\u6237\u53d1\u51fa\u7684\u8bf7\u6c42\u540c\u6837\u88ab\u8f6c\u53d1\uff0c\u4f46\u89e3\u6790\u670d\u52a1\u5668\u5e76\u672a\u8fdb\u884c\u540e\u7eed\u67e5\u8be2\u800c\u662f\u76f4\u63a5\u8fd4\u56de\u4e00\u4e2a\u54cd\u5e94\uff0c\u89e3\u6790\u8def\u5f84\u5982\u56fe\u4e8c\u84dd\u7ebf\u6240\u793a\uff1b\u6b64\u65f6\uff0c\u6743\u5a01\u670d\u52a1\u5668\u6ca1\u6709\u6536\u5230\u4efb\u4f55\u67e5\u8be2\uff0c\u4f46\u662f\u5ba2\u6237\u7aef\u5374\u6536\u5230\u89e3\u6790\u7ed3\u679c\u3002\u3000<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"430\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165632-1024x430.jpg\" alt=\"\" class=\"wp-image-3164\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165632-1024x430.jpg 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165632-300x126.jpg 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165632-768x322.jpg 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165632-250x105.jpg 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165632-150x63.jpg 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165632.jpg 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u56fe2DNS\u89e3\u6790\u8def\u5f84\u7c7b\u522b\uff08\u4ec5\u8003\u8651\u8bf7\u6c42\u9636\u6bb5\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u6211\u4eec\u6ce8\u610f\u5230\uff0c\u53ef\u80fd\u9020\u6210DNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\u7684\u8bbe\u65bd\u79cd\u7c7b\u8f83\u591a\uff0c\u4e0d\u4ec5\u5305\u62ec\u8fd0\u8425\u5546\u90e8\u7f72\u7684\u4e2d\u95f4\u76d2\u5b50[7]\uff0c\u8fd8\u5305\u62ec\u6076\u610f\u8f6f\u4ef6\u3001\u53cd\u75c5\u6bd2\u8f6f\u4ef6[8]\u3001\u9632\u706b\u5899\u4ee5\u53ca\u4f01\u4e1a\u4ee3\u7406[9]\u7b49\u3002\u5728\u8fd9\u9879\u7814\u7a76\u4e2d\uff0c\u6211\u4eec\u91cd\u70b9\u5173\u6ce8\u5982\u4f55\u68c0\u6d4b\u8fd9\u79cd\u73b0\u8c61\uff0c\u56e0\u6b64\u4e0d\u5bf9\u52ab\u6301\u8005\u8fdb\u884c\u533a\u5206\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000<strong>\u6d4b\u91cf\u5206\u6790<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u5bf9\u4e8eDNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\u73b0\u8c61\uff0c\u6211\u4eec\u5728\u6d4b\u91cf\u5206\u6790\u4e2d\u4f9d\u6b21\u56de\u7b54\u4e86\u4e0b\u5217\u95ee\u9898\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000<strong>1. DNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\u89c4\u6a21\u6709\u591a\u5927\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u6211\u4eec\u8bbe\u8ba1\u4e86\u4e24\u4e2a\u9636\u6bb5\u7684\u5b9e\u9a8c\u3002\u7b2c\u4e00\u9636\u6bb5\uff0c\u7814\u7a76\u5168\u7403\u8303\u56f4\u901a\u8fc7TCP\u534f\u8bae\u4f20\u8f93\u7684DNS\u6570\u636e\u5305\uff0c\u7ed3\u679c\u57282691\u4e2a\u81ea\u6cbb\u57df\u4e2d\uff0c198\u4e2a\u81ea\u6cbb\u57df\u68c0\u6d4b\u5230DNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\uff0c7.36%\u7684DNS\u6570\u636e\u5305\u53d7\u5230\u5f71\u54cd\uff1b\u7b2c\u4e8c\u9636\u6bb5\uff0c\u7814\u7a76\u4e2d\u56fd\u8303\u56f4\u5185\u901a\u8fc7UDP\u548cTCP\u534f\u8bae\u4f20\u8f93\u7684DNS\u6570\u636e\u5305\uff0c\u7ed3\u679c\u5728356\u4e2a\u81ea\u6cbb\u57df\u4e2d\uff0c61\u4e2a\u81ea\u6cbb\u57df\u68c0\u6d4b\u5230DNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\uff0c17.13%\u7684DNS\u6570\u636e\u5305\u53d7\u5230\u5f71\u54cd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u7279\u522b\u662f\uff0c\u5728\u4e2d\u56fd\u7f51\u7edc\u4e2d\uff0c \u901a\u8fc7UDP\u534f\u8bae\u53d1\u5f80Google\u516c\u5171DNS\u7684\u6570\u636e\u5305\uff0c\u670927.9%\u53d7\u5230DNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\u7684\u5f71\u54cd\uff08\u901a\u8fc7TCP\u4f20\u8f93\u65f6\u4e3a7.3%\uff09\uff1b\u76f8\u6bd4\u800c\u8a00\uff0c\u5bf9\u4e8e\u4e0d\u77e5\u540d\u7684DNS\u670d\u52a1\u5668\uff0c\u540c\u6837\u4e5f\u67099.8%\u7684\u6570\u636e\u5305\u53d7\u5230\u5f71\u54cd\uff08\u901a\u8fc7TCP\u4f20\u8f93\u65f6\u4e3a1.1%\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000<strong>2.DNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\u6709\u4ec0\u4e48\u7279\u70b9\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000&#8211; \u8def\u5f84\u52ab\u6301\u7c7b\u578b\u5c42\u9762\u7684\u7279\u5f81<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u6211\u4eec\u53d1\u73b0\uff0c\u76f4\u63a5\u5e94\u7b54\u52ab\u6301\u65b9\u5f0f\uff08Direct responding\uff09\u6781\u5c11\u53d1\u751f\u3002\u8fd9\u5f88\u53ef\u80fd\u662f\u56e0\u4e3a\u6b64\u65f6\u7684\u54cd\u5e94\u7ed3\u679c\u660e\u663e\u662f\u4e0d\u6b63\u786e\u7684\u3002\u6b64\u5916\uff0c\u8bf7\u6c42\u8f6c\u53d1\uff08Request directing\uff09\u7684\u6bd4\u4f8b\u8981\u9ad8\u4e8e\u8bf7\u6c42\u590d\u5236\uff08Request replication\uff09\u7684\u6bd4\u4f8b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000&#8211; \u81ea\u6cbb\u57df\u5c42\u9762\u7684\u7279\u5f81<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u5728\u6bcf\u4e2a\u81ea\u6cbb\u57df\u5185\uff0c\u89e3\u6790\u8def\u5f84\u52ab\u6301\u7684\u7279\u70b9\u5dee\u522b\u5de8\u5927\uff0c\u5373\u4f7f\u5728\u540c\u4e00\u4e2a\u81ea\u6cbb\u57df\u5185\uff0c\u7531\u4e8e\u52ab\u6301\u8005\u7684\u591a\u6837\u6027\uff0c\u6574\u4f53\u8868\u73b0\u51fa\u7684\u52ab\u6301\u7279\u5f81\u4e5f\u4f1a\u8f83\u4e3a\u590d\u6742\u3002 \u4f8b\u5982\uff0c\u5728\u88681\u9009\u53d6\u7684\u6848\u4f8b\u4e2d\uff0cAS9808\u548cAS56040\u8fd9\u4e24\u4e2a\u81ea\u6cbb\u57df\u540c\u5c5e\u4e8e\u4e00\u5bb6\u8fd0\u8425\u5546\uff0c\u4f46\u662f\u5728\u8bf7\u6c42\u590d\u5236\u7c7b\u578b\u7684\u6bd4\u4f8b\u4e0a\u4e5f\u5b58\u5728\u660e\u663e\u5dee\u5f02\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:left\"> <br>\u3000\u3000 \u88681 DNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\u5728\u4e0d\u540c\u81ea\u6cbb\u57df\u5185\u7684\u7279\u70b9<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"547\" height=\"202\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2019\/04\/15547157561.png\" alt=\"\" class=\"wp-image-3176\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/15547157561.png 547w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/15547157561-300x111.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/15547157561-250x92.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/15547157561-150x55.png 150w\" sizes=\"auto, (max-width: 547px) 100vw, 547px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000<strong>3.\u52ab\u6301\u73b0\u8c61\u5bf9DNS\u67e5\u8be2\u6027\u80fd\u6709\u4ec0\u4e48\u5f71\u54cd\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u30001\uff09\u4e0d\u540c\u7c7b\u578b\u7684\u89e3\u6790\u8def\u5f84\u52ab\u6301\u5bf9DNS\u67e5\u8be2\u6027\u80fd\u6709\u4ec0\u4e48\u5f71\u54cd\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u5c06\u5404DNS\u8bf7\u6c42\u5b8c\u6210\u7684\u65f6\u95f4\uff08Round trip time\uff0c RTT\uff09\u8fdb\u884c\u7d2f\u79ef\u5206\u5e03\u4f5c\u56fe\uff0c\u5f97\u5230\u56fe\u4e09\u3002\u76f8\u6bd4\u4e8e\u672a\u88ab\u52ab\u6301\u7684\u8bf7\u6c42\uff08\u7eff\u8272\u66f2\u7ebf\uff09\uff0c\u6211\u4eec\u53d1\u73b0\u901a\u8fc7\u8bf7\u6c42\u590d\u5236\uff08\u7ea2\u8272\u66f2\u7ebf\uff09\u7684\u52ab\u6301\u65b9\u5f0f\u786e\u5b9e\u80fd\u591f\u63d0\u9ad8DNS\u67e5\u8be2\u7684\u6027\u80fd\uff0c\u603b\u4f53\u7684\u67e5\u8be2\u65f6\u95f4\u66f4\u77ed\uff1b\u4f46\u662f\u901a\u8fc7\u8bf7\u6c42\u8f6c\u53d1\u7684\u65b9\u5f0f\uff08\u9ec4\u8272\u66f2\u7ebf\uff09\u4e0d\u80fd\u591f\u7a33\u5b9a\u5730\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\u3002\u53e6\u5916\uff0c\u6211\u4eec\u5411\u7528\u6237\u7684\u672c\u5730DNS\u670d\u52a1\u5668\uff08Local DNS resolver\uff09\u53d1\u9001\u4e00\u4e2aDNS\u6570\u636e\u5305\u7528\u4e8e\u4f5c\u6027\u80fd\u5bf9\u6bd4\uff0c\u7ed3\u679c\u663e\u793a\u5176\u6027\u80fd\u66f2\u7ebf\uff08\u84dd\u8272\uff09\u4e0e\u8bf7\u6c42\u8f6c\u53d1\u7684\u6027\u80fd\u66f2\u7ebf\u9ad8\u5ea6\u8fd1\u4f3c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"430\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165642-1024x430.jpg\" alt=\"\" class=\"wp-image-3166\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165642-1024x430.jpg 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165642-300x126.jpg 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165642-768x323.jpg 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165642-250x105.jpg 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165642-150x63.jpg 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165642.jpg 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u56fe3 DNS\u67e5\u8be2\u6027\u80fd\u5bf9\u6bd4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u30002\uff09 \u5bf9\u4e8e\u8bf7\u6c42\u590d\u5236\u8fd9\u4e00\u573a\u666f\uff0c\u54ea\u4e00\u4e2a\u67e5\u8be2\u6570\u636e\u5305\u4f1a\u66f4\u5148\u5230\u6743\u5a01\u670d\u52a1\u5668\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u53e6\u4e00\u4e2a\u6211\u4eec\u611f\u5174\u8da3\u7684\u95ee\u9898\u662f\uff0c\u5f53\u52ab\u6301\u8005\u4f7f\u7528\u8bf7\u6c42\u590d\u5236\uff08Request replication\uff09\u65b9\u5f0f\u52ab\u6301\u89e3\u6790\u8def\u5f84\u65f6\uff0c \u5982\u679c\u4ece\u6743\u5a01\u670d\u52a1\u5668\u7684\u89d2\u5ea6\u89c2\u6d4b\uff0c\u539f\u59cb\u7684DNS\u8bf7\u6c42\u548c\u590d\u5236\u7684DNS\u54ea\u4e2a\u4f1a\u66f4\u5148\u5230\u8fbe\u6743\u5a01\u670d\u52a1\u5668\u3002\u56fe\u56db\u663e\u793a\u6211\u4eec\u5bf9\u8fd9\u4e00\u65f6\u95f4\u5dee\u5f02\u7684\u5206\u6790\u3002 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srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165646-1024x427.jpg 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165646-300x125.jpg 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165646-768x320.jpg 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165646-250x104.jpg 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165646-150x63.jpg 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165646.jpg 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u56fe4 \u590d\u5236\u62a2\u7b54\u5f0f\u8def\u5f84\u52ab\u6301\u6027\u80fd\u5206<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000<strong>4.\u52ab\u6301\u8005\u662f\u5426\u4f1a\u7be1\u6539DNS\u54cd\u5e94\u6570\u636e\u5305\u5185\u5bb9\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u6211\u4eec\u5728\u6240\u6536\u96c6\u7684\u5b9e\u9a8c\u6570\u636e\u4e2d\uff0c\u53d1\u73b0\u4e86\u4e0a\u767e\u4f8bDNS\u89e3\u6790\u7ed3\u679c\u88ab\u7be1\u6539\u7684\u6848\u4f8b\u3002\u901a\u8fc7\u4eba\u5de5\u5206\u6790\uff0c\u5bfc\u81f4DNS\u54cd\u5e94\u8bb0\u5f55\u88ab\u7be1\u6539\u7684\u539f\u56e0\u5305\u62ec\uff1a\u672c\u5730\u6d41\u91cf\u7f51\u5173\u3001\u7070\u8272\u6d41\u91cf\u53d8\u73b0\u3001\u7ba1\u7406\u5458\u8bef\u914d\u7f6e\u7b49\u3002\u4f8b\u5982\uff0c\u56fe\u4e94\u662f\u6211\u4eec\u53d1\u73b0\u52ab\u6301\u5e76\u4fee\u6539Google\u516c\u5171DNS\u670d\u52a1\u5668\u54cd\u5e94\u5185\u5bb9\u4e00\u4e2a\u6848\u4f8b\uff0c\u52ab\u6301\u540e\u7684\u7f51\u9875\u5185\u5bb9\u4e3a\u4e00\u6b3e\u79fb\u52a8APP\u7684\u63a8\u5e7f\u4fe1\u606f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"409\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165651-1-1024x409.jpg\" alt=\"\" class=\"wp-image-3171\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165651-1-1024x409.jpg 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165651-1-300x120.jpg 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165651-1-768x306.jpg 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165651-1-250x100.jpg 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165651-1-150x60.jpg 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2019\/04\/\u5fae\u4fe1\u56fe\u7247_20190408165651-1.jpg 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align:center\">\u56fe5\u67d0\u8fd0\u8425\u5546\u52ab\u6301DNS\u6d41\u91cf\u793a\u4f8b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000<strong>5.\u8def\u5f84\u52ab\u6301\u4f1a\u5e26\u6765\u54ea\u4e9b\u5b89\u5168\u5a01\u80c1\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000&#8211; \u9053\u5fb7\u4e0e\u9690\u79c1\u98ce\u9669<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u52ab\u6301\u8005\u5f88\u53ef\u80fd\u5728\u672a\u5f81\u5f97\u7528\u6237\u540c\u610f\u7684\u60c5\u51b5\u4e0b\uff0c\u7be1\u6539\u7528\u6237\u7684DNS\u8bbf\u95ee\uff0c\u4e0d\u4ec5\u5e26\u6765\u4e86\u9053\u5fb7\u95ee\u9898\uff0c\u800c\u4e14\u7ed9\u7528\u6237\u7684\u9690\u79c1\u6765\u4e86\u98ce\u9669\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000&#8211; \u7f51\u7edc\u6545\u969c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u52ab\u6301\u8005\u7684\u884c\u4e3a\u4f7f\u5f97\u7528\u6237\u7684\u7f51\u7edc\u94fe\u8def\u66f4\u52a0\u590d\u6742\uff0c\u5f53\u51fa\u73b0\u6545\u969c\u65f6\u96be\u4ee5\u6392\u9664\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000&#8211; DNS\u529f\u80fd\u7279\u6027<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u66ff\u4ee3DNS\u670d\u52a1\u5668\u53ef\u80fd\u7f3a\u4e4fDNS\u7684\u67d0\u4e9b\u529f\u80fd\u7279\u6027\uff0c\u4f8b\u5982\uff0c\u6839\u636e\u7ec8\u7aef\u5b50\u7f51\u8fd4\u56de\u6700\u4f18\u7684IP\u5730\u5740\u7684\u9009\u9879\uff08EDNS Client Subnet\uff0cECS\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000&#8211; DNS\u670d\u52a1\u5668\u5b89\u5168\u6027<\/p>\n\n\n\n<p 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class=\"wp-block-paragraph\">\u3000\u3000\u76ee\u524d\uff0cFirefox\u6d4f\u89c8\u5668\u4ece\u7b2c62\u7248\u672c\u5f00\u59cb\u652f\u6301DNS-over-HTTPS\u3002\u6b64\u5916\uff0c\u8d8a\u6765\u8d8a\u591a\u7684\u516c\u5171DNS\u670d\u52a1\u5668\u548c\u77e5\u540dDNS\u8f6f\u4ef6\u5f00\u59cb\u9010\u6b65\u652f\u6301\u4e0d\u540c\u7684DNS\u52a0\u5bc6\u65b9\u6848\uff0c\u5176\u4e2d\u516c\u5171DNS\u670d\u52a1\u5668\u5305\u62ecGoogle\u3001Cloudflare\u3001Quad9\u7b49\uff0c\u77e5\u540d\u7684DNS\u8f6f\u4ef6\u5305\u62ecBIND\u3001Unbound\u3001Knot\u3001CoreDNS\u7b49\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000<strong>\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000\u5728\u8fd9\u9879\u7814\u7a76\u4e2d\uff0c\u6211\u4eec\u7cfb\u7edf\u5730\u5206\u6790\u4e86DNS\u89e3\u6790\u8def\u5f84\u52ab\u6301\u8fd9\u4e00\u5a01\u80c1\u3002\u901a\u8fc7\u5168\u7403\u8303\u56f4\u7684\u5927\u89c4\u6a21\u6d4b\u91cf\u7814\u7a76\uff0c\u5206\u6790\u4e86\u5176\u89c4\u6a21\u3001\u7279\u70b9\u3001\u5b89\u5168\u5a01\u80c1\u4ee5\u53ca\u76ee\u7684\u3002\u5728\u8bba\u6587\u53d1\u8868\u540e\uff0c\u591a\u4e2a\u56fd\u9645\u77e5\u540d\u5b89\u5168\u5a92\u4f53\u5bf9\u6211\u4eec\u7684\u7814\u7a76\u5185\u5bb9\u8fdb\u884c\u4e86\u62a5\u9053\uff0c\u5305\u62ecACM TechNews\u3001The Register\u3001 HackRead\u3001HelpNet Security \u548c Rambler [14~17] \u7b49\u3002\u6211\u4eec\u5e0c\u671b\u8fd9\u9879\u7814\u7a76\u7ed3\u679c\uff0c\u80fd\u591f\u8fdb\u4e00\u6b65\u63a8\u8fdbDNSSEC\u548c\u52a0\u5bc6DNS\u65b9\u6848\u7684\u5927\u89c4\u6a21\u89c4\u8303\u90e8\u7f72\u548c\u5e94\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f5c\u8005\u7b80\u4ecb\uff1a\u5218\u4fdd\u541b\uff0c\u6e05\u534e\u5927\u5b66\u8ba1\u7b97\u673a\u7cfb\u535a\u58eb\u7814\u7a76\u751f\uff0c\u5bfc\u5e08\u6bb5\u6d77\u65b0\u6559\u6388\u4e0e\u5218\u83b9\u6559\u6388\uff0c\u66fe\u5728UC Berkeley \u8bbf\u95ee\u7814\u7a76\uff0c\u5728Vern Paxson\u6559\u6388\u6307\u5bfc\u4e0b\u5de5\u4f5c\u3002\u4e3b\u8981\u7814\u7a76\u65b9\u5411\u4e3a\u7f51\u7edc\u57fa\u7840\u8bbe\u65bd\u5b89\u5168\uff0c\u5305\u62ecDNS\u3001Web\u3001CDN\u7b49\u7cfb\u7edf\u7684\u5b89\u5168\u4ee5\u53ca\u5730\u4e0b\u4ea7\u4e1a\u68c0\u6d4b\u3002\u73b0\u6709\u5b66\u672f\u8bba\u6587\u53d1\u8868\u4e8eUSENIX Security\u3001DSN\u7b49\u7f51\u7edc\u5b89\u5168\u4f1a\u8bae\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u53c2\u8003\u6587\u732e\uff1a<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[1] Liu, B., Lu, C., Duan, H., Liu, Y., Li, Z., Hao, S., &amp; Yang, M. Who Is Answering My Queries: Understanding and Characterizing Interception of the DNS Resolution Path. In USENIX Security (2008).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[2] DAGON, D., PROVOS, N., LEE, C. P., AND LEE, W. Corrupted dns resolution<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000paths: The rise of a malicious resolution authority. In NDSS (2008).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[3] WEAVER, N., KREIBICH, C., NECHAEV, B., AND PAXSON, V. Implications of netalyzr dns measurements. In Proceedings of the First Workshop on Securing and Trusting Internet Names (SATIN), Teddington, United Kingdom (2011).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[4] WEAVER, N., KREIBICH, C., AND PAXSON, V. Redirecting dns for ads and profit. In FOCI (2011).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[5] KUHRER, M., HUPPERICH, T., BUSHART, J., ROSSOW, C., AND HOLZ, T. Going wild: Large-scale classification of open dns resolvers. In Proceedings of the 2015 ACM Conference on Internet Measurement Conference (2015), ACM, pp. 355\u2013368.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[6] CHUNG, T., CHOFFNES, D., AND MISLOVE, A. Tunneling for transparency: A large-scale analysis of end-to-end violations in the internet. In Proceedings of the 2016 ACM on Internet Measurement Conference (2016), ACM, pp. 199\u2013213.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[7]Is your ISP hijacking your dns traffic? https:\/\/labs.ripe.net\/Members\/babak_farrokhi\/is-your-isp-hijacking-your-dns-traffic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[8]Avast secure DNS. https:\/\/help.avast.com\/en\/av_abs\/10\/etc_tools_secure_dns_overview.html.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[9]Cisco umbrella intelligent proxy.https:\/\/learn-umbrella.cisco.com\/feature-briefs\/intelligent-proxy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[10] ZDNS: Solutions for campus network services. http:\/\/free.eol.cn\/edu_net\/edudown\/2017luntan\/zdns.pdf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[11]The practice of DNS traffic control based on out-of-band responder<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000Mechanism. http:\/\/www.ttm.com.cn\/article\/2016\/1000-1247\/1000-1247-1-1-00064.shtml.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[12] Cisco: DNS configuration guide. https:\/\/www.cisco.com\/c\/en\/us\/td\/docs\/ios-xml\/ios\/ipaddr_dns\/configuration\/12-4t\/dns-12-4t-book\/dns-config-dns.html.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[13] Hu, Z., et al. Specification for DNS over transport layer security (TLS). No. RFC 7858. 2016.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[14] ACM Technews. How Often Are Users&#8217; DNS Queries Intercepted? https:\/\/technews.acm.org\/archives.cfm?fo=2018-08-aug\/aug-24-2018.html.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[15] The Resigter. How&#8217;s that encryption coming, buddy? DNS requests routinely spied on, boffins claim. https:\/\/www.theregister.co.uk\/2018\/08\/20\/dns_interception\/.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[16] HackRead. Hackers can intercept and manipulate DNS queries, researchers warn. https:\/\/www.hackread.com\/hackers-can-intercept-and-manipulate-dns-queries-researchers-warn\/.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3000\u3000[17] Rambler. Most DNS queries can be easily intercepted, experts say. https:\/\/news.rambler.ru\/other\/40604197-bolshinstvo-dns-zaprosov-legko-perehvatit-schitayut-eksperty\/.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3000\u3000\u672c\u8bba\u6587\u4e3a\u201cWho Is Answering My Queries: Understanding &#8230; <a class=\"continue-reading-link\" href=\"http:\/\/202.112.238.40\/wp\/?p=3161\"> Continue reading <span class=\"meta-nav\">&rarr; <\/span><\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-3161","post","type-post","status-publish","format-standard","hentry","category-research"],"_links":{"self":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/3161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3161"}],"version-history":[{"count":8,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/3161\/revisions"}],"predecessor-version":[{"id":3179,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/3161\/revisions\/3179"}],"wp:attachment":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3161"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}