{"id":4515,"date":"2015-04-01T23:56:53","date_gmt":"2015-04-01T15:56:53","guid":{"rendered":"https:\/\/www.icocean.com\/blog\/?p=4515"},"modified":"2015-04-02T00:06:11","modified_gmt":"2015-04-01T16:06:11","slug":"%e6%94%bb%e5%87%bb%e8%80%85%e5%a6%82%e4%bd%95%e5%8a%ab%e6%8c%81js%e6%95%b0%e6%8d%ae%e5%8c%85","status":"publish","type":"post","link":"https:\/\/www.icocean.com\/blog\/?p=4515","title":{"rendered":"\u653b\u51fb\u8005\u5982\u4f55\u52ab\u6301JS\u6570\u636e\u5305"},"content":{"rendered":"<p>\u5728GitHub\u906d\u53d7\u7684\u5927\u89c4\u6a21DDoS\u653b\u51fb\u4e2d\uff0c\u653b\u51fb\u8005\u521b\u9020\u6027\u7684\u52ab\u6301\u4e86\u767e\u5ea6\u7684JS\u6570\u636e\u5305\uff0c\u8ba9\u5927\u7ea61%\u8bbf\u95ee\u5d4c\u5165\u767e\u5ea6JS\u7684\u6d77\u5916\u4e2d\u56fd\u7f51\u7ad9\u8bbf\u95ee\u8005\u6210\u4e3aDDoS\u5927\u519b\u4e2d\u7684\u4e00\u5458\u3002\u653b\u51fb\u8005\u662f\u5982\u4f55\u505a\u5230\u7684\uff0c\u5982\u4f55\u786e\u5b9a\u8fd9\u4e0e\u767e\u5ea6\u65e0\u5173\uff1f\u7f51\u7edc\u4e2d\u4f20\u8f93\u7684\u6570\u636e\u5305\u662f\u6709\u5bff\u547d\u7684\uff0c\u4e3a\u4e86\u9632\u6b62\u6570\u636e\u65e0\u9650\u5faa\u73af\uff0c\u540d\u4e3a<a href=\"http:\/\/en.wikipedia.org\/wiki\/Time_to_live\" target=\"_blank\">\u5b58\u6d3b\u65f6\u95f4\uff08Time to live\uff0cTTL\uff09<\/a>\u6216\u8df3\u6570\u9650\u5236\uff08hop limit\uff09\u7684\u673a\u5236\u9650\u5b9a\u4e86\u6570\u636e\u5305\u7684\u5bff\u547d\u3002\u4e00\u65e6\u5bff\u547d\u7ed3\u675f\uff0c\u6570\u636e\u5305\u5c06\u4f1a\u88ab\u4e22\u5f03\u3002\u5728\u8fd9\u6b21\u653b\u51fb\u4e2d\uff0c\u6076\u610f\u6570\u636e\u5305\u548c\u5408\u6cd5\u5206\u6790\u4ee3\u7801\u7684TTL\u503c\u662f\u4e0d\u540c\u7684\u3002\u5982\u56fe\u6240\u793a\uff0c\u5408\u6cd5SYN+ACK \u6570\u636e\u5305\u7684TTL\u662f42\u8df3\uff0c\u653b\u51fb\u8005\u6ce8\u5165\u7684\u4e09\u4e2a\u6076\u610f\u6570\u636e\u5305\u7684TTL\u5206\u522b\u662f227\u3001228\u548c229\u8df3\u3002SYN+ACK\u6570\u636e\u5305\u6e90\u81ea\u767e\u5ea6\u670d\u52a1\u5668\uff0c\u800c\u6ce8\u5165\u7684\u6570\u636e\u5305\u5219\u6765\u81ea\u5176\u5b83\u5730\u65b9\u3002\u5728\u5916\u754c\u6ce8\u610f\u5230TTL\u503c\u7684\u5dee\u5f02\u540e\uff0c\u653b\u51fb\u8005\u663e\u7136\u6539\u53d8\u4e86\u7b56\u7565\uff0c\u5728\u6700\u65b0\u52ab\u6301\u65b0\u6d6aJS\u6587\u4ef6\u7684\u653b\u51fb\u4e2d\uff0cTTL\u7684\u503c<a href=\"https:\/\/twitter.com\/mac_zhou\/status\/583197902224297984\/photo\/1\" target=\"_blank\">\u6ca1\u6709\u53d1\u751f\u53d8\u5316<\/a>\u3002\u6b64\u6b21\u52ab\u6301\u53d1\u751f\u5728\u4eca\u5929\u3002<a href=\"https:\/\/status.github.com\/messages\" target=\"_blank\">GitHub\u7684\u670d\u52a1<\/a>\u5df2\u7ecf\u5b8c\u5168\u6062\u590d\u4e86\u6b63\u5e38\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.icocean.com\/blog\/wp-content\/uploads\/auto_save_image\/2015\/04\/1606117VM.png\" alt=\"\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728GitHub\u906d\u53d7\u7684\u5927\u89c4\u6a21DDoS\u653b\u51fb\u4e2d\uff0c\u653b\u51fb\u8005\u521b\u9020\u6027\u7684\u52ab\u6301\u4e86\u767e\u5ea6\u7684JS\u6570\u636e\u5305\uff0c\u8ba9\u5927\u7ea61%\u8bbf\u95ee\u5d4c\u5165\u767e\u5ea6JS\u7684\u6d77 <a href='https:\/\/www.icocean.com\/blog\/?p=4515' class='excerpt-more'>[&#8230;]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[2576,4043,896],"class_list":["post-4515","post","type-post","status-publish","format-standard","hentry","category-4","tag-ddos","tag-github","tag-896","category-4-id","post-seq-1","post-parity-odd","meta-position-corners","fix"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/4515","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4515"}],"version-history":[{"count":2,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/4515\/revisions"}],"predecessor-version":[{"id":4518,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/4515\/revisions\/4518"}],"wp:attachment":[{"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.icocean.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}