{"id":42,"date":"2023-06-14T11:17:00","date_gmt":"2023-06-14T03:17:00","guid":{"rendered":"http:\/\/54.254.190.68\/note\/?p=42"},"modified":"2024-06-14T11:21:03","modified_gmt":"2024-06-14T03:21:03","slug":"l7-dos","status":"publish","type":"post","link":"https:\/\/systw.net\/note\/archives\/42","title":{"rendered":"L7 DoS"},"content":{"rendered":"\n<p>L7 DoS\uff08Layer 7 Denial of Service, \u61c9\u7528\u5c64\u62d2\u7d55\u670d\u52d9\uff09\u653b\u64ca\u662f\u6307\u91dd\u5c0d OSI \u6a21\u578b\u7b2c\u4e03\u5c64\uff08\u61c9\u7528\u5c64\uff09\u7684\u62d2\u7d55\u670d\u52d9\u653b\u64ca\u3002\u9019\u985e\u653b\u64ca\u65e8\u5728\u4f7f\u76ee\u6a19\u61c9\u7528\u7a0b\u5e8f\u3001\u7db2\u7ad9\u6216\u670d\u52d9\u7121\u6cd5\u6b63\u5e38\u904b\u884c\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">L7 DoS\u653b\u64ca\u7279\u9ede<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u91dd\u5c0d\u61c9\u7528\u5c64<\/strong>\uff1aL7 DoS \u653b\u64ca\u76f4\u63a5\u91dd\u5c0d\u61c9\u7528\u5c64\u5354\u8b70\uff0c\u9019\u4f7f\u5f97\u5b83\u5011\u80fd\u5920\u7e5e\u904e\u4e00\u4e9b\u50b3\u7d71\u7684\u9632\u706b\u7246\u548c\u5165\u4fb5\u6aa2\u6e2c\u7cfb\u7d71\uff0c\u56e0\u70ba\u9019\u4e9b\u7cfb\u7d71\u4e3b\u8981\u91dd\u5c0d\u8f03\u4f4e\u5c64\u7684\u6d41\u91cf\u9032\u884c\u6aa2\u6e2c\u548c\u9632\u8b77\u3002<\/li>\n\n\n\n<li><strong>\u6a21\u4eff\u5408\u6cd5\u6d41\u91cf<\/strong>\uff1aL7 DoS \u653b\u64ca\u901a\u5e38\u6a21\u4eff\u6b63\u5e38\u7528\u6236\u7684\u884c\u70ba\uff0c\u4f7f\u5f97\u6bcf\u500b\u8acb\u6c42\u770b\u8d77\u4f86\u90fd\u662f\u5408\u6cd5\u7684\uff0c\u4f46\u7531\u65bc\u8acb\u6c42\u91cf\u904e\u5927\u6216\u8acb\u6c42\u7279\u6027\u7279\u6b8a\uff0c\u6703\u5c0e\u81f4\u4f3a\u670d\u5668\u8cc7\u6e90\u8017\u76e1\u3002<\/li>\n\n\n\n<li><strong>\u6d88\u8017\u8cc7\u6e90<\/strong>\uff1a\u9019\u4e9b\u653b\u64ca\u901a\u904e\u6d88\u8017\u4f3a\u670d\u5668\u7684CPU\u3001\u5167\u5b58\u7b49\u8cc7\u6e90\u4f86\u5be6\u73fe\u62d2\u7d55\u670d\u52d9\uff0c\u6700\u7d42\u5c0e\u81f4\u4f3a\u670d\u5668\u7121\u6cd5\u8655\u7406\u5408\u6cd5\u7528\u6236\u7684\u8acb\u6c42\u3002<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e38\u898b\u653b\u64ca\u985e\u578b<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CC Attack<\/li>\n\n\n\n<li>Slow Attack<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">CC Attack<\/h2>\n\n\n\n<p>Challenge Collapsar \u653b\u64ca\u662f\u4e00\u7a2e\u91dd\u5c0d\u7db2\u7ad9\u548c\u5728\u7dda\u670d\u52d9\u7684DoS\/DDoS\u3002\u9019\u985e\u653b\u64ca\u4e3b\u8981\u901a\u904e\u767c\u9001\u5408\u6cd5\u7684\u5927\u91cf\u7684\u865b\u5047\u8acb\u6c42\u4f86\u6d88\u8017\u76ee\u6a19\u670d\u52d9\u5668\u7684\u8cc7\u6e90\uff0c\u5c0e\u81f4\u4e00\u822c\u7528\u6236\u7121\u6cd5\u6b63\u5e38\u8a2a\u554f\u670d\u52d9\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u653b\u64ca\u539f\u7406<\/h3>\n\n\n\n<p>Challenge Collapsar \u653b\u64ca\u4f7f\u7528\u5408\u6cd5\u624b\u6bb5\uff0c\u901a\u5e38\u6d89\u53ca\u767c\u9001\u5927\u91cf\u7684 HTTP GET \u6216 POST \u8acb\u6c42\u5230\u76ee\u6a19\u7db2\u7ad9\u3002\u9019\u4e9b\u8acb\u6c42\u901a\u5e38\u5305\u542b\u5408\u6cd5\u7684 HTTP \u6a19\u982d\u548c\u6578\u64da\uff0c\u4f7f\u5176\u770b\u8d77\u4f86\u50cf\u6b63\u5e38\u7684\u7528\u6236\u8acb\u6c42\uff0c\u4f46\u5be6\u969b\u4e0a\u9019\u4e9b\u8acb\u6c42\u7684\u76ee\u7684\u662f\u6d88\u8017\u670d\u52d9\u5668\u8cc7\u6e90\uff08\u5982 CPU\u3001\u5167\u5b58\u548c\u5e36\u5bec\uff09\uff0c\u6700\u7d42\u4f7f\u670d\u52d9\u5668\u904e\u8f09\u4e26\u5c0e\u81f4\u62d2\u7d55\u670d\u52d9\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u653b\u64ca\u6d41\u7a0b<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5927\u898f\u6a21\u8acb\u6c42\u767c\u9001<\/strong>\uff1a\u653b\u64ca\u8005\u4f7f\u7528\u5927\u91cf\u7684\u5206\u4f48\u5f0f\u6a5f\u5668\uff08\u901a\u5e38\u662f\u88ab\u52ab\u6301\u7684\u6bad\u5c4d\u7db2\u7d61\uff09\u4f86\u5411\u76ee\u6a19\u7db2\u7ad9\u767c\u9001\u5927\u91cf\u7684 HTTP \u8acb\u6c42\u3002\u9019\u4e9b\u8acb\u6c42\u53ef\u80fd\u5305\u542b\u96a8\u6a5f\u7684\u53c3\u6578\u6216\u91cd\u8907\u7684\u6578\u64da\uff0c\u4ee5\u907f\u514d\u88ab\u7c21\u55ae\u7684\u904e\u6ffe\u6a5f\u5236\u8b58\u5225\u3002<\/li>\n\n\n\n<li><strong>\u8cc7\u6e90\u6d88\u8017<\/strong>\uff1a\u6bcf\u500b HTTP \u8acb\u6c42\u90fd\u6703\u8b93\u76ee\u6a19\u670d\u52d9\u5668\u57f7\u884c\u4e00\u5b9a\u7684\u8655\u7406\u64cd\u4f5c\uff0c\u5982\u8b80\u53d6\u6578\u64da\u5eab\u3001\u751f\u6210\u7db2\u9801\u5167\u5bb9\u6216\u8655\u7406\u8868\u55ae\u63d0\u4ea4\u3002\u7576\u5927\u91cf\u7684\u865b\u5047\u8acb\u6c42\u540c\u6642\u5230\u9054\u6642\uff0c\u670d\u52d9\u5668\u7684\u8cc7\u6e90\uff08CPU\u3001\u5167\u5b58\u3001\u5e36\u5bec\uff09\u6703\u88ab\u8fc5\u901f\u6d88\u8017\u3002<\/li>\n\n\n\n<li><strong>\u62d2\u7d55\u670d\u52d9<\/strong>\uff1a\u6700\u7d42\uff0c\u670d\u52d9\u5668\u7121\u6cd5\u8655\u7406\u6240\u6709\u7684\u8acb\u6c42\uff0c\u5305\u62ec\u5408\u6cd5\u7528\u6236\u7684\u8acb\u6c42\uff0c\u5c0e\u81f4\u5408\u6cd5\u7528\u6236\u7121\u6cd5\u8a2a\u554f\u7db2\u7ad9\u6216\u670d\u52d9\u5668\u56de\u61c9\u901f\u5ea6\u6975\u6162\u3002<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u9632\u79a6\u63aa\u65bd<\/h3>\n\n\n\n<p>\u5c0d\u65bc Challenge Collapsar \u653b\u64ca\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u9632\u79a6\u63aa\u65bd\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6d41\u91cf\u904e\u6ffe\u548c\u901f\u7387\u9650\u5236<\/strong>\uff1a\u4f7f\u7528\u9632\u706b\u7246\u548c\u5165\u4fb5\u6aa2\u6e2c\u7cfb\u7d71\u4f86\u904e\u6ffe\u7570\u5e38\u6d41\u91cf\uff0c\u4e26\u8a2d\u7f6e\u901f\u7387\u9650\u5236\u4f86\u63a7\u5236\u55ae\u500b IP \u5730\u5740\u7684\u8acb\u6c42\u901f\u7387\u3002<\/li>\n\n\n\n<li><strong>\u5167\u5bb9\u4ea4\u4ed8\u7db2\u7d61\uff08CDN\uff09<\/strong>\uff1a\u5229\u7528 CDN \u5c07\u6d41\u91cf\u5206\u6563\u5230\u591a\u500b\u670d\u52d9\u5668\u4e0a\uff0c\u6e1b\u5c11\u55ae\u500b\u670d\u52d9\u5668\u7684\u8ca0\u8f09\u58d3\u529b\u3002<\/li>\n\n\n\n<li><strong>\u81ea\u52d5\u5316\u6311\u6230\u548c\u9a57\u8b49<\/strong>\uff1a\u5be6\u65bd\u5982 CAPTCHA \u7684\u6311\u6230\u6a5f\u5236\u4f86\u8b58\u5225\u548c\u963b\u6b62\u6a5f\u5668\u4eba\u6d41\u91cf\u3002<\/li>\n\n\n\n<li><strong>\u9ad8\u53ef\u7528\u6027\u67b6\u69cb<\/strong>\uff1a\u4f7f\u7528\u8ca0\u8f09\u5747\u8861\u548c\u9ad8\u53ef\u7528\u6027\u67b6\u69cb\u4f86\u78ba\u4fdd\u7cfb\u7d71\u80fd\u5920\u61c9\u5c0d\u5927\u91cf\u8acb\u6c42\uff0c\u540c\u6642\u5177\u5099\u5feb\u901f\u6062\u5fa9\u80fd\u529b\u3002<\/li>\n\n\n\n<li><strong>\u7db2\u7d61\u76e3\u63a7\u548c\u97ff\u61c9\u8a08\u5283<\/strong>\uff1a\u6301\u7e8c\u76e3\u63a7\u7db2\u7d61\u6d41\u91cf\uff0c\u53ca\u6642\u767c\u73fe\u7570\u5e38\u4e26\u8fc5\u901f\u505a\u51fa\u97ff\u61c9\uff0c\u6e1b\u5c11\u653b\u64ca\u5f71\u97ff\u3002<\/li>\n<\/ol>\n\n\n\n<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Slow Attack<\/h2>\n\n\n\n<p>Slow Attack (\u6162\u901f\u653b\u64ca) \u662f\u4e00\u7a2e\u62d2\u7d55\u670d\u52d9\u653b\u64ca\uff08DoS\/DDoS\uff09\uff0c\u5b83\u901a\u904e\u975e\u5e38\u6162\u901f\u5730\u767c\u9001\u8acb\u6c42\u6216\u4fdd\u6301\u9023\u63a5\u4ee5\u6d88\u8017\u76ee\u6a19\u670d\u52d9\u5668\u7684\u8cc7\u6e90\uff0c\u4f7f\u5176\u7121\u6cd5\u8655\u7406\u5176\u4ed6\u6b63\u5e38\u7684\u8acb\u6c42\u3002\u9019\u985e\u653b\u64ca\u901a\u5e38\u5f88\u96e3\u6aa2\u6e2c\uff0c\u56e0\u70ba\u6bcf\u500b\u8acb\u6c42\u672c\u8eab\u770b\u8d77\u4f86\u90fd\u662f\u5408\u6cd5\u7684\uff0c\u4f46\u7d2f\u7a4d\u8d77\u4f86\u6703\u5c0e\u81f4\u670d\u52d9\u5668\u8cc7\u6e90\u67af\u7aed\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u6162\u901f\u653b\u64ca\uff1a<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">1. Slowloris \u653b\u64ca<\/h3>\n\n\n\n<p>Slowloris \u662f\u4e00\u7a2e\u91dd\u5c0d HTTP Header\u7684\u6162\u901f\u653b\u64ca\uff0c\u901a\u904e\u4fdd\u6301\u5927\u91cf\u534a\u958b\u7684HTTP\u9023\u63a5\u4f86\u6d88\u8017\u670d\u52d9\u5668\u8cc7\u6e90\u3002<\/p>\n\n\n\n<p><strong>\u5de5\u4f5c\u539f\u7406<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u653b\u64ca\u8005\u5411\u76ee\u6a19\u670d\u52d9\u5668\u767c\u9001\u5927\u91cf\u7684\u90e8\u5206HTTP Header\u8acb\u6c42\u3002<\/li>\n\n\n\n<li>\u6bcf\u500bHeader\u8acb\u6c42\u90fd\u4e0d\u5b8c\u6574\uff0c\u4e26\u4e14\u653b\u64ca\u8005\u6703\u4ee5\u975e\u5e38\u6162\u7684\u901f\u5ea6\u6301\u7e8c\u767c\u9001\u66f4\u591a\u7684\u6578\u64da\u4f86\u4fdd\u6301\u9023\u63a5\u6253\u958b\u72c0\u614b\u3002<\/li>\n\n\n\n<li>\u670d\u52d9\u5668\u6703\u4fdd\u6301\u9019\u4e9b\u9023\u63a5\uff0c\u7b49\u5f85\u5b8c\u6574\u7684\u8acb\u6c42\uff0c\u6700\u7d42\u8cc7\u6e90\u8017\u76e1\u7121\u6cd5\u8655\u7406\u65b0\u7684\u8acb\u6c42\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. Slow POST \u653b\u64ca<\/h3>\n\n\n\n<p>Slow POST \u653b\u64ca\u901a\u904e\u975e\u5e38\u6162\u901f\u5730\u767c\u9001 HTTP POST \u8acb\u6c42\u4e2d\u7684\u6578\u64da\u4f86\u6d88\u8017\u670d\u52d9\u5668\u8cc7\u6e90\u3002<\/p>\n\n\n\n<p><strong>\u5de5\u4f5c\u539f\u7406<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u653b\u64ca\u8005\u767c\u9001\u4e00\u500b HTTP POST \u8acb\u6c42\uff0c\u4e26\u5728\u6a19\u982d\u4e2d\u6307\u5b9a\u4e00\u500b\u5927\u7684\u5167\u5bb9\u9577\u5ea6\u3002<\/li>\n\n\n\n<li>\u7136\u5f8c\uff0c\u653b\u64ca\u8005\u4ee5\u975e\u5e38\u6162\u7684\u901f\u5ea6\u767c\u9001 POST \u6578\u64da\uff0c\u4f7f\u5f97\u9023\u63a5\u9577\u6642\u9593\u4fdd\u6301\u6253\u958b\u72c0\u614b\u3002<\/li>\n\n\n\n<li>\u670d\u52d9\u5668\u9700\u8981\u4fdd\u6301\u9019\u4e9b\u9023\u63a5\uff0c\u7b49\u5f85\u5b8c\u6574\u7684 POST \u6578\u64da\uff0c\u6700\u7d42\u5c0e\u81f4\u8cc7\u6e90\u8017\u76e1\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3. 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