{"id":3997,"date":"2020-06-27T20:38:19","date_gmt":"2020-06-27T11:53:19","guid":{"rendered":"https:\/\/www.inforsec.org\/wp\/?p=3997"},"modified":"2020-06-27T20:42:59","modified_gmt":"2020-06-27T11:57:59","slug":"%ef%bb%bfrangeamp%e6%94%bb%e5%87%bb%ef%bc%9a%e5%b0%86cdn%e5%8f%98%e6%88%90ddos%e5%8a%a0%e5%86%9c%e7%82%ae","status":"publish","type":"post","link":"http:\/\/202.112.238.40\/wp\/?p=3997","title":{"rendered":"\ufeffRangeAmp\u653b\u51fb\uff1a\u5c06CDN\u53d8\u6210DDoS\u52a0\u519c\u70ae"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u4f5c\u8005\uff1a\u674e\u4f1f\u4e2d\uff0c\u90ed\u6da6\uff0c\u5218\u4fdd\u541b\uff0c\u6bb5\u6d77\u65b0<\/p>\n\n\n\n<p 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class=\"wp-block-paragraph\">\u8be5\u8bba\u6587\u662fDSN 2020\u4f1a\u8bae\u4e2d\u83b7\u5f97\u6700\u4f73\u8bba\u6587\u5956\u63d0\u540d\u7684\u4e09\u7bc7\u8bba\u6587\u4e4b\u4e00\uff0c\u5c06\u4e8e2020\u5e746\u670830\u65e522\u65f6\u5de6\u53f3\uff08\u5317\u4eac\u65f6\u95f4\uff09\u5728DSN\u4f1a\u8bae\u4e0a\u516c\u5f00\u53d1\u8868\u30022020\u5e746\u670821\u65e5\u524d<a href=\"https:\/\/dsn2020.webs.upv.es\/registration\/\">\u6ce8\u518cDSN\u4f1a\u8bae<\/a>\u4ec5\u970025\u6b27\u5143\uff0c6\u670824\u65e5\u524d75\u6b27\u5143\uff08\u6ce8\u518c\u622a\u6b62\u65e5\u671f\uff09\uff0c\u8fdc\u7a0b\u53c2\u4e0e\u4f1a\u8bae\u53ef\u4ee5\u53c2\u4e0e\u6700\u4f73\u8bba\u6587\u6295\u7968\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bba\u6587\u4e0b\u8f7d\uff1a<a href=\"https:\/\/netsec.ccert.edu.cn\/files\/papers\/cdn-backfire-dsn2020.pdf\">https:\/\/netsec.ccert.edu.cn\/files\/papers\/cdn-backfire-dsn2020.pdf<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9884\u544a\u89c6\u9891\uff1a<a href=\"https:\/\/liwz11.com\/down\/RangeAmp-DSN20-Teaser.mp4\">https:\/\/liwz11.com\/down\/RangeAmp-DSN20-Teaser.mp4<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u95ee\u9898\u80cc\u666f<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"http:\/\/cloudflare.com\/learning\/cdn\/what-is-a-cdn\/\">CDN<\/a>\uff08Content Delivery Network, 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class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"321\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72471-1-1024x321.png\" alt=\"\" class=\"wp-image-4015\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72471-1-1024x321.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72471-1-300x94.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72471-1-768x240.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72471-1-150x47.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72471-1-250x78.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72471-1.png 1543w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\uff0c\u8d8a\u6765\u8d8a\u591a\u7684\u7f51\u7ad9\u88ab\u6258\u7ba1\u5728CDN\u4e0a\u3002\u6839\u636e <a href=\"https:\/\/ieeexplore.ieee.org\/document\/8416498\">Lin Jin \u7b49\u4eba<\/a>\u7684\u6d4b\u91cf\u7ed3\u679c\uff0c\u5927\u7ea6\u670939%\u7684Top 10k\u7f51\u7ad9\u88ab\u6258\u7ba1\u5728CDN\u4e0a\u3002\u800c\u6839\u636e<a href=\"https:\/\/www.reinvention.be\/webhdfs\/v1\/docs\/complete-white-paper-c11-481360.pdf\">\u601d\u79d1\u62a5\u544a<\/a>\uff0c\u57282016\u5e74\u670952%\u7684\u4e92\u8054\u7f51\u6d41\u91cf\u662f\u901a\u8fc7CDN\u5206\u53d1\u7684\uff0c\u52302021\u5e74\u8fd9\u4e00\u6bd4\u4f8b\u9884\u8ba1\u4f1a\u4e0a\u5347\u523070%\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/tools.ietf.org\/html\/rfc7233\">HTTP\u8303\u56f4\u8bf7\u6c42\u673a\u5236<\/a>\u65e8\u5728\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u3001\u63d0\u9ad8\u7f51\u7ad9\u6027\u80fd\u3002\u5f53\u901a\u8fc7Internet\u4f20\u8f93\u6587\u4ef6\u65f6\uff0c\u6709\u65f6\u4f1a\u56e0\u4e3a\u7f51\u7edc\u7b49\u95ee\u9898\u5bfc\u81f4\u4f20\u8f93\u88ab\u4e2d\u65ad\uff1b\u800cHTTP\u534f\u8bae\u662f\u4e00\u79cd\u65e0\u72b6\u6001\u534f\u8bae\uff0c\u56e0\u6b64\u5ba2\u6237\u7aef\u5fc5\u987b\u91cd\u65b0\u8bf7\u6c42\u6574\u4e2a\u76ee\u6807\u6587\u4ef6\u3002\u5bf9\u4e8e\u5927\u6587\u4ef6\u7684\u4e0b\u8f7d\uff0c\u8fd9\u53ef\u80fd\u4f1a\u975e\u5e38\u4f4e\u6548\u3002\u4e3a\u4e86\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u7f51\u7edc\u4f20\u8f93\uff0cHTTP\/1.1\u534f\u8bae\u5f00\u59cb\u5f15\u5165\u8303\u56f4\u8bf7\u6c42\u673a\u5236\uff0c\u5141\u8bb8\u5ba2\u6237\u7aef\u53ea\u8bf7\u6c42\u76ee\u6807\u6587\u4ef6\u7684\u4e00\u4e2a\u6216\u591a\u4e2a\u5b50\u8303\u56f4\uff0c\u5982\u56fe\u6240\u793a\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"439\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72472-1024x439.png\" alt=\"\" class=\"wp-image-4000\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72472-1024x439.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72472-300x129.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72472-768x329.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72472-150x64.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72472-1050x450.png 1050w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72472-250x107.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72472.png 1524w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4e3b\u8981\u53d1\u73b0<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u867d\u7136CDN\u548cHTTP\u8303\u56f4\u8bf7\u6c42\u673a\u5236\u90fd\u81f4\u529b\u4e8e\u63d0\u5347\u7f51\u7edc\u6027\u80fd\uff0c\u4f46\u662f\u6211\u4eec\u5374\u53d1\u73b0\uff0c<strong>CDN\u5bf9HTTP\u8303\u56f4\u8bf7\u6c42\u673a\u5236\u7684\u5b9e\u73b0\u5b58\u5728\u5b89\u5168\u7f3a\u9677\uff0c\u4f7f\u5f97CDN\u7684\u524d\u7aef\u8fde\u63a5\u548c\u540e\u7aef\u8fde\u63a5\u4e4b\u95f4\u4ea7\u751f\u5de8\u5927\u6d41\u91cf\u5dee\u5f02<\/strong>\uff0c\u5bfc\u81f4\u6f5c\u5728\u7684\u6d41\u91cf\u653e\u5927\u653b\u51fb\uff0c\u653b\u51fb\u8005\u80fd\u591f\u6ee5\u7528CDN\u5bf9\u7f51\u7ad9\u670d\u52a1\u5668\u6216CDN\u8282\u70b9\u5b9e\u65bdDDoS\u653b\u51fb\u3002\u672c\u6587\u5c06\u8fd9\u7c7b\u65b0\u578b\u7684\u5e94\u7528\u5c42\u653e\u5927\u653b\u51fb\u6280\u672f\u79f0\u4e3aRange-based Traffic Amplification Attacks\uff0c\u7b80\u79f0<strong>RangeAmp\u653b\u51fb<\/strong>\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u6f0f\u6d1e\u53d1\u73b0\uff1a\u901a\u8fc7\u5206\u6790CDN\u5bf9\u8303\u56f4\u8bf7\u6c42\u7684\u8f6c\u53d1\u7b56\u7565\u548c\u54cd\u5e94\u884c\u4e3a\uff0c\u63d0\u51fa\u4e86RangeAmp\u653b\u51fb\u7684\u4e24\u79cd\u653b\u51fb\u53d8\u4f53\uff0c\u5206\u522b\u662f\u5c0f\u5b57\u8282\u8303\u56f4\uff08SBR\uff09\u653b\u51fb\u548c\u91cd\u53e0\u5b57\u8282\u8303\u56f4\uff08OBR\uff09\u653b\u51fb\u3002\u5176\u4e2d\uff0cSBR\u653b\u51fb\u8005\u80fd\u591f\u5229\u7528CDN\u5bf9\u7f51\u7ad9\u670d\u52a1\u5668\u5b9e\u65bdDDoS\u653b\u51fb\uff0c\u800cOBR\u653b\u51fb\u8005\u80fd\u591f\u5229\u7528CDN\u5bf9CDN\u8282\u70b9\u5b9e\u65bdDDoS\u653b\u51fb\u3002<\/li><li>\u5f71\u54cd\u8303\u56f4\uff1a\u5bf9\u5168\u740313\u4e2a\u4e3b\u6d41CDN\u8fdb\u884c\u4e86\u6d4b\u91cf\u3002\u53d1\u73b0\u8fd913\u4e2aCDN\u90fd\u5b58\u5728\u6f5c\u5728\u7684SBR\u653b\u51fb\uff0c\u80fd\u591f\u88ab\u7528\u4e8e\u653b\u51fb\u5927\u591a\u6570\u7f51\u7ad9\u670d\u52a1\u5668\uff1b\u53d1\u73b011\u79cdCDN\u7ea7\u8054\u7ec4\u5408\uff08\u6db5\u76d6\u4e866\u4e2aCDN\uff09\u5b58\u5728\u6f5c\u5728\u7684OBR\u653b\u51fb\uff0c\u5c06\u76f4\u63a5\u5a01\u80c1CDN\u7684\u7f51\u7edc\u53ef\u7528\u6027\u3002<\/li><li>\u4e25\u91cd\u7a0b\u5ea6\uff1a\u5728\u67d0\u4e9b\u573a\u666f\u4e2d\uff0cSBR\u653b\u51fb\u7684\u6d41\u91cf\u653e\u5927\u500d\u6570\u9ad8\u8fbe43330\uff0cOBR\u653b\u51fb\u7684\u6d41\u91cf\u653e\u5927\u500d\u6570\u9ad8\u8fbe7500\uff0c\u8fdc\u8fdc\u8d85\u8fc7\u5927\u591a\u6570\u5df2\u77e5\u653b\u51fb\u65b9\u6cd5\u3002\u6b64\u5916\uff0c\u8fd9\u7c7b\u653b\u51fb\u65e0\u9700\u5229\u7528\u50f5\u5c38\u7f51\u7edc\uff0c\u800c\u4e14\u80fd\u591f\u7ed5\u8fc7CDN\u7684DDoS\u68c0\u6d4b\u673a\u5236\uff0c\u8fd8\u53ef\u80fd\u7ed9\u53d7\u5bb3\u8005\u9020\u6210\u5de8\u5927\u7684\u91d1\u94b1\u635f\u5931\u3002<\/li><li>\u89e3\u51b3\u65b9\u6848\uff1a\u5728CDN\u3001\u7f51\u7ad9\u670d\u52a1\u5668\u548cHTTP\u534f\u8bae\u4e09\u4e2a\u5c42\u9762\u4e0a\u5206\u522b\u63d0\u51fa\u4e86\u7f13\u89e3\u63aa\u65bd\u548c\u89e3\u51b3\u65b9\u6848\uff0c\u79ef\u6781\u534f\u52a9\u53d7\u5f71\u54cd\u7684CDN\u5382\u5546\u4fee\u590d\u6f0f\u6d1e\u3002<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SBR\u653b\u51fb\u539f\u7406<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u53d1\u73b0\uff0cCDN\u4f1a\u91c7\u7528\u4e0d\u540c\u7684\u7b56\u7565\u6765\u5904\u7406\u8303\u56f4\u8bf7\u6c42\uff0c\u518d\u5c06\u5176\u8f6c\u53d1\u5230\u6e90\u7ad9\u670d\u52a1\u5668\u3002\u5982\u56fe\u6240\u793a\uff0c<em>Laziness<\/em>\u7b56\u7565\u8868\u793aCDN\u76f4\u63a5\u8f6c\u53d1\u8303\u56f4\u8bf7\u6c42\uff1b<em>Deletion<\/em>\u7b56\u7565\u8868\u793aCDN\u5220\u9664Range\u5934\u90e8\u518d\u8f6c\u53d1\u8bf7\u6c42\uff1b<em>Expansion<\/em>\u7b56\u7565\u8868\u793aCDN\u6269\u5c55Range\u5934\u90e8\u4e2d\u7684\u5b57\u8282\u8303\u56f4\u518d\u8f6c\u53d1\u8bf7\u6c42\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"423\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72473-1-1024x423.png\" alt=\"\" class=\"wp-image-4002\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72473-1-1024x423.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72473-1-300x124.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72473-1-768x317.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72473-1-150x62.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72473-1-250x103.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72473-1.png 1554w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5927\u591a\u6570CDN\u503e\u5411\u4e8e\u91c7\u7528<em>Deletion<\/em>\u7b56\u7565\u6216<em>Expansion<\/em>\u7b56\u7565\u6765\u5904\u7406\u8303\u56f4\u8bf7\u6c42\u3002\u5f53\u63a5\u6536\u5230\u4e00\u4e2a\u8303\u56f4\u8bf7\u6c42\u65f6\uff0cCDN\u5f80\u5f80\u4f1a\u201c\u8ba4\u4e3a\u201d\u5ba2\u6237\u7aef\u53ef\u80fd\u4f1a\u7ee7\u7eed\u8bf7\u6c42\u540c\u4e00\u76ee\u6807\u6587\u4ef6\u7684\u5176\u4ed6\u5b57\u8282\u8303\u56f4\uff0c\u56e0\u6b64\u4f1a\u5c06Range\u5934\u90e8\u5220\u9664\u6216\u5c06\u5176\u6269\u5c55\u4e3a\u66f4\u5927\u7684\u5b57\u8282\u8303\u56f4\uff0c\u518d\u5c06\u8bf7\u6c42\u8f6c\u53d1\u5230\u6e90\u7ad9\u670d\u52a1\u5668\uff0c\u7136\u540e\u4e3a\u540e\u7eed\u7684\u8303\u56f4\u8bf7\u6c42\u7f13\u5b58\u6765\u81ea\u6e90\u7ad9\u670d\u52a1\u5668\u7684\u54cd\u5e94\u5185\u5bb9\u3002\u4e00\u65e6\u63a5\u6536\u5230\u540c\u4e00\u76ee\u6807\u6587\u4ef6\u7684\u5176\u4ed6\u8303\u56f4\u8bf7\u6c42\uff0cCDN\u4fbf\u53ef\u4ee5\u5c1d\u8bd5\u76f4\u63a5\u4ece\u672c\u5730\u7f13\u5b58\u8fdb\u884c\u5feb\u901f\u54cd\u5e94\u3002\u8fd9\u4e0d\u4ec5\u4f18\u5316\u4e86\u7f13\u5b58\uff0c\u8fd8\u51cf\u5c11\u4e86\u8bbf\u95ee\u5ef6\u8fdf\uff0c\u800c\u4e14\u80fd\u591f\u9632\u6b62\u8fc7\u591a\u7684\u56de\u6e90\u8bf7\u6c42\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Deletion<\/em>\u7b56\u7565\u548c<em>Expansion<\/em>\u7b56\u7565\u786e\u5b9e\u80fd\u591f\u5e2e\u52a9CDN\u6539\u5584\u670d\u52a1\uff0c\u4f46\u662f\u4e0e\u5ba2\u6237\u7aef\u6240\u8bf7\u6c42\u7684\u5b57\u8282\u6570\u76f8\u6bd4\uff0c\u8fd9\u4e24\u79cd\u7b56\u7565\u8981\u6c42CDN\u4ece\u6e90\u7ad9\u670d\u52a1\u5668\u8bf7\u6c42\u66f4\u591a\u7684\u5b57\u8282\u6570\u3002\u5982\u56fe\u6240\u793a\uff0c\u5982\u679cCDN\u91c7\u7528<em>Deletion<\/em>\u7b56\u7565\u6216<em>Expansion<\/em>\u7b56\u7565\uff08<strong>\u653b\u51fb\u6761\u4ef6<\/strong>\uff09\uff0c\u90a3\u4e48\u653b\u51fb\u8005\u53ef\u4ee5\u6784\u9020\u4e00\u4e2a\u5177\u6709\u8f83\u5c0f\u5b57\u8282\u8303\u56f4\u7684\u8303\u56f4\u8bf7\u6c42\u6765\u53d1\u8d77RangeAmp\u653b\u51fb\uff0c\u4f7f\u5f97CDN\u548c\u6e90\u7ad9\u670d\u52a1\u5668\u4e4b\u95f4\u9700\u8981\u4f20\u8f93\u5de8\u5927\u7684\u54cd\u5e94\u6d41\u91cf\uff0c\u4ece\u800c\u5927\u91cf\u6d88\u8017\u6e90\u7ad9\u670d\u52a1\u5668\u7684\u51fa\u53e3\u5e26\u5bbd\u8d44\u6e90\uff08<strong>\u653b\u51fb\u76ee\u6807<\/strong>\uff09\u3002\u672c\u6587\u5c06\u5176\u79f0\u4e3a\u201cSmall Byte Range Attack\u201d\uff0c\u7b80\u79f0SBR\u653b\u51fb\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"444\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72474-1024x444.png\" alt=\"\" class=\"wp-image-4003\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72474-1024x444.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72474-300x130.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72474-768x333.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72474-150x65.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72474-250x108.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72474.png 1459w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>OBR\u653b\u51fb\u539f\u7406<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HTTP\u8303\u56f4\u8bf7\u6c42\u673a\u5236\u5141\u8bb8\u5ba2\u6237\u7aef\u8bf7\u6c42\u76ee\u6807\u6587\u4ef6\u7684\u591a\u4e2a\u5b50\u8303\u56f4\uff0c\u4f46\u662f<a href=\"https:\/\/tools.ietf.org\/html\/rfc2616\">RFC2616<\/a>\u5bf9\u591a\u8303\u56f4\u8bf7\u6c42\u6ca1\u6709\u4efb\u4f55\u9650\u5236\u3002<a href=\"https:\/\/www.rapid7.com\/db\/modules\/auxiliary\/dos\/http\/apache_range_dos\">Apache Killer<\/a>\uff0c\u53c8\u88ab\u79f0\u4e3aCVE-2011-3192\uff0c\u5141\u8bb8\u653b\u51fb\u8005\u901a\u8fc7\u53d1\u9001\u591a\u8303\u56f4\u8bf7\u6c42\u6765\u8017\u5c3dApache\u670d\u52a1\u5668\u4e0a\u7684<strong>\u5185\u5b58\u8d44\u6e90<\/strong>\u3002\u56e0\u6b64\uff0c<a href=\"https:\/\/tools.ietf.org\/html\/rfc7233\">RFC7233<\/a>\u9488\u5bf9\u591a\u8303\u56f4\u8bf7\u6c42\u589e\u52a0\u4e86\u4e00\u4e9b\u5b89\u5168\u8003\u8651\uff0c\u5efa\u8baeHTTP \u670d\u52a1\u5668\u5e94\u8be5\u5ffd\u7565\u3001\u5408\u5e76\u6216\u62d2\u7edd\u67d0\u4e9b\u53ef\u80fd\u5b58\u5728\u6076\u610f\u76ee\u7684\u7684\u591a\u8303\u56f4\u8bf7\u6c42\uff0c\u4f8b\u5982\u5177\u6709\u4e24\u4e2a\u4ee5\u4e0a\u91cd\u53e0\u8303\u56f4\u6216\u8005\u5177\u6709\u8bb8\u591a\u5c0f\u8303\u56f4\u7684\u591a\u8303\u56f4\u8bf7\u6c42\u3002\u5927\u591a\u6570CDN\u786e\u5b9e\u91c7\u7528\u4e86RFC7233\u7684\u5b89\u5168\u5efa\u8bae\u3002\u4f46\u5f88\u9057\u61be\u7684\u662f\uff0c\u67d0\u4e9bCDN\u51fa\u4e8e\u4e1a\u52a1\u9700\u6c42\u6216\u8005\u5176\u4ed6\u8003\u8651\uff0c\u5b8c\u5168\u5ffd\u7565\u4e86\u8be5\u5efa\u8bae\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u56fe\u6240\u793a\uff0c\u4e24\u4e2aCDN\u53ef\u4ee5\u88ab\u7ea7\u8054\u3002\u5982\u679c\u524d\u7aefCDN\u91c7\u7528<em>Laziness<\/em>\u7b56\u7565\uff0c\u800c\u4e14\uff0c\u540e\u7aefCDN\u5bf9\u591a\u8303\u56f4\u8bf7\u6c42\u76f4\u63a5\u8fd4\u56de\u591a\u90e8\u5206\u54cd\u5e94\u800c\u4e0d\u68c0\u67e5\u8303\u56f4\u662f\u5426\u91cd\u53e0\uff08<strong>\u653b\u51fb\u6761\u4ef6<\/strong>\uff09\uff0c\u90a3\u4e48\u653b\u51fb\u8005\u53ef\u4ee5\u6784\u9020\u4e00\u4e2a\u5177\u6709\u5927\u91cf\u91cd\u53e0\u8303\u56f4\u7684\u591a\u8303\u56f4\u8bf7\u6c42\u6765\u53d1\u8d77RangeAmp\u653b\u51fb\uff0c\u4f7f\u5f97\u524d\u7aefCDN\u548c\u540e\u7aefCDN\u4e4b\u95f4\u9700\u8981\u4f20\u8f93\u5de8\u5927\u7684\u54cd\u5e94\u6d41\u91cf\uff0c\u4ece\u800c\u5927\u91cf\u6d88\u8017\u524d\u7aefCDN\u548c\u540e\u7aefCDN\u7684\u7279\u5b9a\u8282\u70b9\u7684\u5e26\u5bbd\u8d44\u6e90\uff08<strong>\u653b\u51fb\u76ee\u6807<\/strong>\uff09\u3002\u672c\u6587\u5c06\u5176\u79f0\u4e3aOverlapping Byte Ranges Attack\uff0c\u7b80\u79f0OBR\u653b\u51fb\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"421\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72475-1024x421.png\" alt=\"\" class=\"wp-image-4004\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72475-1024x421.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72475-300x123.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72475-768x316.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72475-150x62.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72475-250x103.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72475.png 1570w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6d4b\u91cf\u8bc4\u4f30<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. \u5b9e\u9a8c\u6d4b\u91cf<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u6d4b\u91cf\u4e86\u5168\u740313\u4e2a\u4e3b\u6d41CDN\u7684\u8303\u56f4\u8bf7\u6c42\u8f6c\u53d1\u7b56\u7565\uff0c\u53d1\u73b0\u6240\u6709CDN\u90fd\u5bf9\u7279\u5b9a\u683c\u5f0f\u7684Range\u5934\u90e8\u91c7\u7528<em>Deletion<\/em>\u7b56\u7565\u6216<em>Expansion<\/em>\u7b56\u7565\u3002\u56e0\u6b64\uff0c\u8fd913\u4e2aCDN\u90fd\u53d7\u5230SBR\u653b\u51fb\u7684\u5f71\u54cd\u3002\u6211\u4eec\u8fd8\u6d4b\u91cf\u4e86SBR\u653b\u51fb\u5728\u4e0d\u540c\u76ee\u6807\u6587\u4ef6\u5927\u5c0f\uff081~25MB\uff09\u65f6\u7684\u6d41\u91cf\u653e\u5927\u500d\u6570\uff0c\u5982\u4e0b\u8868\u6240\u793a\uff0c\u7b2c\u4e00\u5217\u662f\u53d7\u5f71\u54cd\u7684CDN\u5382\u5546\uff0c\u7b2c\u4e8c\u5217\u662f\u7cbe\u5fc3\u6784\u9020\u7684\u6d4b\u8bd5\u7528\u4f8b\uff0c\u7b2c\u4e09\u5217\u662f\u76ee\u6807\u6587\u4ef6\u5927\u5c0f\u5206\u522b\u4e3a1MB\u300110MB\u548c25MB\u65f6\u6240\u53d6\u5f97\u7684\u6d41\u91cf\u653e\u5927\u500d\u6570\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"922\" height=\"833\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72476.png\" alt=\"\" class=\"wp-image-4005\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72476.png 922w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72476-300x271.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72476-768x694.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72476-150x136.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72476-166x150.png 166w\" sizes=\"auto, (max-width: 922px) 100vw, 922px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u6d4b\u91cf\u4e86\u4e0a\u8ff013\u4e2aCDN\u5bf9\u591a\u8303\u56f4\u8bf7\u6c42\u7684\u8f6c\u53d1\u884c\u4e3a\u548c\u54cd\u5e94\u884c\u4e3a\uff0c\u53d1\u73b0\u67094\u4e2aCDN\u91c7\u7528Laziness\u7b56\u7565\u8f6c\u53d1\u591a\u8303\u56f4\u8bf7\u6c42\uff0c\u67093\u4e2aCDN\u5bf9\u591a\u8303\u56f4\u8bf7\u6c42\u76f4\u63a5\u8fd4\u56de\u591a\u90e8\u5206\u54cd\u5e94\u800c\u4e0d\u68c0\u67e5\u8303\u56f4\u662f\u5426\u91cd\u53e0\u3002\u56e0\u6b64\uff0c\u8fd9\u4e9bCDN\u90fd\u53d7\u5230OBR\u653b\u51fb\u7684\u5f71\u54cd\uff0c\u603b\u5171\u670911\u79cdCDN\u7ea7\u8054\u7ec4\u5408\uff0c\u6db5\u76d66\u4e2a\u4e0d\u540c\u7684CDN\u5382\u5546\u3002\u6211\u4eec\u8fdb\u4e00\u6b65\u6d4b\u91cf\u4e86\u8fd911\u79cdCDN\u7ea7\u8054\u7ec4\u5408\u80fd\u591f\u4ea7\u751f\u7684\u6700\u5927\u6d41\u91cf\u653e\u5927\u500d\u6570\uff0c\u5982\u4e0b\u8868\u6240\u793a\uff0c\u7b2c\u4e00\u5217\u548c\u7b2c\u4e8c\u5217\u662f\u53d7\u5f71\u54cd\u7684CDN\u7ea7\u8054\u7ec4\u5408\uff0c\u7b2c\u4e09\u5217\u662f\u7cbe\u5fc3\u6784\u9020\u7684\u6d4b\u8bd5\u7528\u4f8b\uff0c\u7b2c\u56db\u5217\u662f\u6d4b\u8bd5\u7528\u4f8b\u4e2d\u80fd\u591f\u5305\u542b\u7684\u91cd\u53e0\u8303\u56f4\u6700\u5927\u6570\u91cf\uff0c\u7b2c\u4e94\u5217\u662f\u76ee\u6807\u6587\u4ef6\u5927\u5c0f\u4e3a1KB\u65f6\u540e\u7aefCDN\u63a5\u6536\u5230\u7684\u54cd\u5e94\u6d41\u91cf\u3001\u540e\u7aefCDN\u53d1\u51fa\u7684\u54cd\u5e94\u6d41\u91cf\u548c\u76f8\u5e94\u7684\u6d41\u91cf\u653e\u5927\u500d\u6570\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"467\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72477-1-1024x467.png\" alt=\"\" class=\"wp-image-4012\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72477-1-1024x467.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72477-1-300x137.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72477-1-768x350.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72477-1-150x68.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72477-1-250x114.png 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72477-1.png 1490w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. \u653b\u51fb\u6f14\u793a<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u63a2\u7d22RangeAmp\u653b\u51fb\u5bf9\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u5e26\u5bbd\u8d44\u6e90\u7684\u635f\u5bb3\u7a0b\u5ea6\uff0c\u6211\u4eec\u5c06\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u51fa\u53e3\u5e26\u5bbd\u8bbe\u7f6e\u4e3a1000Mbps\uff0c\u5c06\u76ee\u6807\u6587\u4ef6\u5927\u5c0f\u8bbe\u7f6e\u4e3a10MB\uff0c\u7136\u540e\u53d1\u8d77SBR\u653b\u51fb\uff0c\u6301\u7eed30\u79d2\u3002\u5982\u56fe\u6240\u793a\uff0c\u5728\u653b\u51fb\u671f\u95f4\uff0c\u5f53\u5e76\u53d1\u8bf7\u6c42\u6570\u8d85\u8fc713\uff0c\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u7684\u5343\u5146\u51fa\u53e3\u5e26\u5bbd\u57fa\u672c\u88ab\u8017\u5c3d\uff0c\u800c\u653b\u51fb\u7aef\u5e26\u5bbd\u6d88\u8017\u57fa\u672c\u4e0d\u5230500Kbps\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"689\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72478-1024x689.png\" alt=\"\" class=\"wp-image-4007\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72478-1024x689.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72478-300x202.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72478-768x517.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72478-150x101.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72478-223x150.png 223w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72478.png 1249w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"703\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72479-1024x703.png\" alt=\"\" class=\"wp-image-4008\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72479-1024x703.png 1024w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72479-300x206.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72479-768x527.png 768w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72479-150x103.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72479-219x150.png 219w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/\u56fe\u72479.png 1218w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u5916\uff0c\u5728<a href=\"http:\/\/2019.geekpwn.org\/zh\/index.html\">GeekPwn2019<\/a>\u56fd\u9645\u5b89\u5168\u6781\u5ba2\u5927\u8d5b\u4e0a\uff0c\u6211\u4eec\u6210\u529f\u6f14\u793a\u4e86<a href=\"https:\/\/mp.weixin.qq.com\/s\/UEtQ6Xr7XqALPpNV6QsJuQ\">\u5229\u7528RangeAmp\u653b\u51fb\u5bf9\u51fa\u53e3\u5e26\u5bbd\u4e3a3Gbps\u7684\u7f51\u7ad9\u670d\u52a1\u5668\u5b9e\u65bdDDoS\u653b\u51fb<\/a>\u3002\u53d7\u5bb3\u8005\u7f51\u7ad9\u4e3a\u4e3b\u529e\u65b9\u63d0\u4f9b\u7684\u4f4d\u4e8e\u4e2d\u56fd\u7684\u7f51\u7ad9\u670d\u52a1\u5668\uff08\u57df\u540d\u4e3acdntest.geekpwn.org\uff09\uff0c\u653b\u51fb\u6301\u7eed5\u5206\u949f\u4ee5\u4e0a\u3002\u5982\u56fe\u6240\u793a\uff0c\u5728\u653b\u51fb\u671f\u95f4\uff0c\u76ee\u6807\u7f51\u7ad9\u670d\u52a1\u5668\u7684\u51fa\u53e3\u5e26\u5bbd\u88ab\u5b8c\u5168\u8017\u5c3d\u3002\u4e3b\u529e\u65b9\u5728\u53d7\u5bb3\u8005\u7f51\u7ad9\u9996\u9875\u4e0a\u653e\u7f6e\u4e86\u4e24\u5f20\u56fe\u7247\uff0c\u5927\u5c0f\u5206\u522b\u4e3a6.4MB \u548c5.3MB\u3002\u5728\u653b\u51fb\u4e4b\u524d\uff0c\u7f51\u7ad9\u9996\u9875\u52a0\u8f7d\u5ef6\u8fdf\u5927\u7ea6\u4e3a2s\uff1b\u5728\u653b\u51fb\u671f\u95f4\uff0c\u4e3b\u529e\u65b9\u591a\u6b21\u8bbf\u95ee\u7f51\u7ad9\u9996\u9875\uff0c\u52a0\u8f7d\u5ef6\u8fdf\u51e0\u4e4e\u6bcf\u6b21\u90fd\u8d85\u8fc720s\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"745\" height=\"483\" src=\"https:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2020\/06\/15932586051-1.png\" alt=\"\" class=\"wp-image-4010\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/15932586051-1.png 745w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/15932586051-1-300x194.png 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/15932586051-1-150x97.png 150w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2020\/06\/15932586051-1-231x150.png 231w\" sizes=\"auto, (max-width: 745px) 100vw, 745px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u90e8\u5206CDN\uff08\u4f8b\u5982Cloudflare \u548cCloudFront\uff09\u58f0\u79f0\u5b83\u4eec\u5bf9DDoS\u653b\u51fb\u5177\u6709\u68c0\u6d4b\u80fd\u529b\u548c\u9632\u5fa1\u80fd\u529b\u3002\u4f46\u662f\uff0c\u5728\u6240\u6709CDN\u7684\u9ed8\u8ba4\u914d\u7f6e\u548c\u6f5c\u5728DDoS\u9632\u5fa1\u673a\u5236\u4e0b\uff0c\u672c\u6587\u7684\u5b9e\u9a8c\u6d4b\u91cf\u548c\u653b\u51fb\u6f14\u793a\u8fc7\u7a0b\u6ca1\u6709\u89e6\u53d1\u4efb\u4f55\u5b89\u5168\u544a\u8b66\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. \u653b\u51fb\u8bc4\u4f30<\/strong><strong><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u73b0\u6709DDoS\u9632\u5fa1\u673a\u5236\u57fa\u672c\u5931\u6548\u3002<\/strong>\u7b2c\u4e00\uff0c\u4f20\u7edfDDoS\u653b\u51fb\u6280\u672f\u5728CDN\u73af\u5883\u4e2d\u4e0d\u518d\u90a3\u4e48\u6709\u6548\uff1b\u800cRangeAmp\u653b\u51fb\u5229\u7528CDN\u7684\u5b89\u5168\u7f3a\u9677\u6765\u5bf9\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u53d1\u8d77\u653b\u51fb\uff0c\u653b\u51fb\u8bf7\u6c42\u5747\u7531CDN\u8282\u70b9\u4ea7\u751f\uff0c\u8fd9\u53ef\u80fd\u4f1a\u8bef\u5bfcCDN\u5c06\u653b\u51fb\u8bf7\u6c42\u5224\u5b9a\u4e3a\u6b63\u5e38\u8bf7\u6c42\u3002\u7b2c\u4e8c\uff0c\u4f20\u7edfDDoS\u653b\u51fb\u6280\u672f\u4e3b\u8981\u9488\u5bf9\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u7684\u5165\u53e3\u5e26\u5bbd\uff0c\u800cRangeAmp\u653b\u51fb\u4e3b\u8981\u6d88\u8017\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u7684\u51fa\u53e3\u5e26\u5bbd\uff0c\u73b0\u6709\u68c0\u6d4b\u673a\u5236\u4e0d\u4e00\u5b9a\u80fd\u591f\u8bc6\u522b\u6b64\u7c7b\u653b\u51fb\u3002\u7b2c\u4e09\uff0cCDN\u5e73\u53f0\u5f80\u5f80\u5efa\u8bae\u6e90\u7ad9\u670d\u52a1\u5668\u8bbe\u7f6e\u9632\u706b\u5899\u767d\u540d\u5355\uff0c\u53ea\u5141\u8bb8CDN\u8282\u70b9\u8bbf\u95ee\u6e90\u7ad9\u670d\u52a1\u5668\uff0c\u8fd9\u6837\u6e90\u7ad9\u670d\u52a1\u5668\u53ef\u4ee5\u5b8c\u5168\u59d4\u6258CDN\u8fdb\u884cDDoS\u9632\u5fa1\uff1b\u800cRangeAmp\u653b\u51fb\u4f7f\u5f97CDN\u63d0\u4f9b\u7684DDoS\u4fdd\u62a4\u529f\u80fd\u4e0d\u518d\u53ef\u4fe1\uff0c\u4e00\u65e6CDN\u8282\u70b9\u88ab\u6e90\u7ad9\u670d\u52a1\u5668\u5217\u5165\u767d\u540d\u5355\uff0c\u6e90\u7ad9\u670d\u52a1\u5668\u7684DDoS\u9632\u5fa1\u673a\u5236\u5c06\u5f62\u540c\u865a\u8bbe\u3002<\/li><li><strong>\u653b\u51fb\u5f71\u54cd\u8303\u56f4\u975e\u5e38\u5e7f\u6cdb\u3002<\/strong>\u7b2c\u4e00\uff0c\u88ab\u6d4b\u8bd5\u7684\u6240\u670913\u4e2a\u4e3b\u6d41CDN\u90fd\u5b58\u5728\u6f5c\u5728\u7684RangeAmp\u653b\u51fb\uff0c\u8fd9\u4e9bCDN\u5728\u4e16\u754c\u8303\u56f4\u5185\u90fd\u5f88\u53d7\u6b22\u8fce\uff0c\u5e02\u573a\u4efd\u989d\u6392\u540d\u8f83\u9ad8\uff0c\u8bb8\u591a\u4e3b\u6d41\u7f51\u7ad9\u90fd\u6258\u7ba1\u5728\u8fd9\u4e9bCDN\u4e0a\uff0c\u8fd9\u4f7f\u5f97\u5927\u91cf\u7f51\u7ad9\u548cCDN\u8282\u70b9\u90fd\u66b4\u9732\u4e8e\u8be5\u7c7b\u653b\u51fb\u4e2d\u3002\u7b2c\u4e8c\uff0c\u5927\u591a\u6570CDN\u90fd\u4e0d\u9a8c\u8bc1\u6e90\u7ad9\u670d\u52a1\u5668\u7684\u6240\u6709\u6743\uff0c\u56e0\u6b64\u6076\u610f\u5ba2\u6237\u53ef\u4ee5\u5c06CDN\u7684\u6e90\u7ad9\u670d\u52a1\u5668\u914d\u7f6e\u4e3a\u4efb\u610f\u76ee\u6807\u7f51\u7ad9\u3002\u8fd9\u610f\u5473\u7740\uff0c\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u4e0d\u4ec5\u53ef\u4ee5\u662f\u5df2\u7ecf\u6258\u7ba1\u5728CDN\u4e0a\u7684\u7f51\u7ad9\uff0c\u8fd8\u53ef\u4ee5\u662f\u672a\u88ab\u6258\u7ba1\u5728CDN\u4e0a\u7684\u7f51\u7ad9\u3002\u7b2c\u4e09\uff0c\u4e0d\u540cCDN\u7684\u67b6\u6784\u548c\u529f\u80fd\u5927\u540c\u5c0f\u5f02\uff0c\u5176\u4ed6\u672a\u88ab\u6d4b\u8bd5\u7684CDN\u5b58\u5728\u6f5c\u5728\u7684RangeAmp\u653b\u51fb\u7684\u53ef\u80fd\u6027\u975e\u5e38\u9ad8\u3002<\/li><li><strong>\u653b\u51fb\u6210\u672c\u4f4e\u4f46\u7834\u574f\u4e25\u91cd\u3002<\/strong>\u4e00\u65b9\u9762\uff0c\u540c\u5176\u4ed6\u9700\u8981\u63a7\u5236\u5927\u91cf\u50f5\u5c38\u7f51\u7edc\u7684\u4f20\u7edfDDoS\u653b\u51fb\u4e0d\u540c\uff0cCDN\u7684\u5165\u53e3\u8282\u70b9\u5e7f\u6cdb\u5730\u5206\u6563\u5728\u4e16\u754c\u5404\u5730\uff0c\u5f62\u6210\u81ea\u7136\u5206\u5e03\u7684\u201c\u50f5\u5c38\u7f51\u7edc\u201d\uff0c\u56e0\u6b64\u653b\u51fb\u8005\u53ea\u9700\u8981\u4e00\u53f0\u666e\u901a\u7b14\u8bb0\u672c\u7535\u8111\u5c31\u53ef\u4ee5\u53d1\u8d77RangeAmp\u653b\u51fb\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u6839\u636e\u5b9e\u9a8c\u6d4b\u91cf\u7ed3\u679c\uff0cRangeAmp\u653b\u51fb\u7684\u6d41\u91cf\u653e\u5927\u500d\u6570\u8fdc\u8fdc\u9ad8\u4e8e\u5927\u591a\u6570\u5df2\u77e5\u653b\u51fb\u65b9\u6cd5\uff0c\u5728\u67d0\u4e9b\u573a\u666f\u4e2d\uff0cSBR\u653b\u51fb\u7684\u6d41\u91cf\u653e\u5927\u500d\u6570\u9ad8\u8fbe43330\uff0cOBR\u653b\u51fb\u7684\u6d41\u91cf\u653e\u5927\u500d\u6570\u9ad8\u8fbe7471\u3002\u8fd9\u610f\u5473\u7740\uff0c\u653b\u51fb\u8005\u6d88\u8017\u7684\u8d44\u6e90\u975e\u5e38\u5c11\uff0c\u800c\u53d7\u5bb3\u8005\u6d88\u8017\u7684\u8d44\u6e90\u975e\u5e38\u591a\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u8f7b\u677e\u5730\u8017\u5c3d\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u7684\u5e26\u5bbd\u8d44\u6e90\uff0c\u5bfc\u81f4\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u5b8c\u5168\u62d2\u7edd\u670d\u52a1\u3002<\/li><li><strong>\u7ed9\u53d7\u5bb3\u8005\u9020\u6210\u5de8\u5927\u7684\u91d1\u94b1\u635f\u5931\u3002<\/strong>\u5927\u591a\u6570CDN\u5382\u5546\u6839\u636e\u6d41\u91cf\u6d88\u8017\u5411\u5176\u5ba2\u6237\u6536\u53d6\u8d39\u7528\uff0c\u5305\u62ecAkamai\u3001Alibaba Cloud\u3001Azure\u3001CDN77\u3001CDNsun\u3001CloudFront\u3001Fastly\u3001Huawei Cloud\u3001KeyCDN \u548c Tencent Cloud\u3002\u5f53\u7f51\u7ad9\u88ab\u6258\u7ba1\u5728\u8fd9\u4e9bCDN \u4e0a\u65f6\uff0c\u5176\u5546\u4e1a\u5bf9\u624b\u53ef\u4ee5\u6ee5\u7528\u76f8\u5e94\u7684CDN\u5bf9\u6e90\u7ad9\u670d\u52a1\u5668\u53d1\u8d77RangeAmp\u653b\u51fb\uff0c\u4f7f\u5f97\u6e90\u7ad9\u670d\u52a1\u5668\u548cCDN\u8282\u70b9\u4e4b\u95f4\u6301\u7eed\u4f20\u8f93\u5de8\u5927\u7684\u6d41\u91cf\uff0c\u4ece\u800c\u5bfc\u81f4\u9ad8\u6602\u7684CDN\u670d\u52a1\u8d39\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u89e3\u51b3\u65b9\u6848<\/strong><strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5411\u6240\u6709\u76f8\u5173CDN\u5382\u5546\u8d1f\u8d23\u4efb\u5730\u62ab\u9732\u4e86\u76f8\u5173\u6f0f\u6d1e\uff0c\u5e76\u4e3a\u4ed6\u4eec\u63d0\u4f9b\u4e86\u7f13\u89e3\u63aa\u65bd\u548c\u89e3\u51b3\u65b9\u6848\uff0c\u79ef\u6781\u5e2e\u52a9\u4ed6\u4eec\u4fee\u590d\u95ee\u9898\u3002<\/p>\n\n\n\n<table class=\"wp-block-table\"><tbody><tr><td><strong>\u5bf9\u8c61<\/strong><\/td><td><strong>\u5efa\u8bae<\/strong><\/td><\/tr><tr><td>CDN\u5382\u5546<\/td><td>1. \u91c7\u7528\u66f4\u5b89\u5168\u7684<em>Expansion<\/em>\u7b56\u7565\u6765\u8f6c\u53d1\u8303\u56f4\u8bf7\u6c42\uff0c\u4e0d\u5bf9Range\u5934\u90e8\u4e2d\u7684\u5b57\u8282\u8303\u56f4\u8fdb\u884c\u592a\u591a\u7684\u6269\u5c55\uff1b2. \u9075\u5b88RFC7233\u7684\u5efa\u8bae\uff0c\u62d2\u7edd\u3001\u5408\u5e76\u6216\u5ffd\u89c6\u67d0\u4e9b\u591a\u8303\u56f4\u8bf7\u6c42\uff0c\u4f8b\u5982\u5b58\u5728\u91cd\u53e0\u5b57\u8282\u8303\u56f4\u6216\u5b58\u5728\u8bb8\u591a\u5c0f\u8303\u56f4\uff1b3. \u5b8c\u5584DDoS\u4fdd\u62a4\u673a\u5236\uff0c\u589e\u52a0\u5bf9RangeAmp\u653b\u51fb\u7684\u68c0\u6d4b\u548c\u9632\u5fa1\u3002<\/td><\/tr><tr><td>\u7f51\u7ad9\u7ba1\u7406\u5458<\/td><td>1. \u5982\u679c\u7f51\u7ad9\u5df2\u88ab\u6258\u7ba1\u5728CDN\u4e0a\uff0c\u5efa\u8bae\u68c0\u67e5\u8be5CDN\u662f\u5426\u5b58\u5728RangeAmp\u6f0f\u6d1e\uff1b2. \u5982\u679c\u7f51\u7ad9\u672a\u88ab\u6258\u7ba1\u5728CDN\u4e0a\uff0c\u5efa\u8bae\u963b\u585e\u6765\u81eaCDN\u7684\u7f51\u7edc\u6d41\u91cf\u3002<\/td><\/tr><tr><td>HTTP\u534f\u8bae\u89c4\u8303<\/td><td>1. \u589e\u52a0\u5bf9RangeAmp\u653b\u51fb\u7684\u5b89\u5168\u8003\u8651\u30022. \u8003\u8651\u5728\u590d\u6742\u7f51\u7edc\u73af\u5883\u4e2d\u5bf9\u8303\u56f4\u8bf7\u6c42\u673a\u5236\u8fdb\u884c\u66f4\u660e\u786e\u7684\u9650\u5236\uff0c\u4f8b\u5982\u4ee3\u7406\u73af\u5883\u548cCDN\u73af\u5883\u3002<\/td><\/tr><\/tbody><\/table>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u603b\u7ed3<\/strong><strong><\/strong><\/p>\n\n\n\n<p 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class=\"wp-block-paragraph\"><strong>\u81f4\u8c22<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1.\u611f\u8c22 GeekPwn\u4e3b\u529e\u65b9\uff0c\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u653b\u51fb\u6f14\u793a\u7684\u73af\u5883\u548c\u5e73\u53f0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2.\u611f\u8c22RFC7233\u7684\u4f5c\u8005Roy T. 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