{"id":832,"date":"2012-08-01T22:09:41","date_gmt":"2012-08-01T14:09:41","guid":{"rendered":"http:\/\/notes.zerobox.org\/?p=832"},"modified":"2012-08-01T22:09:41","modified_gmt":"2012-08-01T14:09:41","slug":"%e4%bd%bf%e7%94%a8wireshark%e5%88%86%e6%9e%90%e5%b9%b6%e5%8f%91%e7%8e%b0ddos%e6%94%bb%e5%87%bb","status":"publish","type":"post","link":"http:\/\/zerobox.org\/notes\/832.html","title":{"rendered":"\u4f7f\u7528Wireshark\u5206\u6790\u5e76\u53d1\u73b0DDoS\u653b\u51fb"},"content":{"rendered":"<p><strong>\u535a\u6587\u4f5c\u8005\uff1aBigHy[TSRC]<\/strong><\/p>\n<p><strong>\u53d1\u5e03\u65e5\u671f\uff1a2012-08-01<\/strong><\/p>\n<p><strong>\u535a\u6587\u5185\u5bb9\uff1a<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>\u4e0e\u90a3\u4e9b\u590d\u6742\u800c\u7cbe\u5bc6\u7684\u5165\u4fb5\u884c\u4e3a\u548c\u6f0f\u6d1e\u5229\u7528\u76f8\u6bd4\uff0c\u5927\u90e8\u5206\u7684DDoS\u653b\u51fb\u663e\u5f97\u5341\u5206\u7c97\u7ebf\u6761\uff0c\u5c5e\u4e8e\u9ed1\u5ba2\u4e16\u754c\u4e2d\u7684\u201c\u66b4\u529b\u72af\u7f6a\u201d\u3002\u7136\u800c\uff0c\u968f\u7740\u7f51\u7edc\u89c4\u6a21\u7684\u4e0d\u65ad\u6269\u5927\uff0c\u53ef\u5229\u7528\u7684\u50f5\u5c38\u7f51\u7edc\u89c4\u6a21\u7684\u548c\u5e26\u5bbd\u4e0d\u65ad\u589e\u52a0\u3002\u73b0\u4ecaDDoS\u653b\u51fb\u8005\u7684\u53d1\u8d77\u53d8\u5f97\u76f8\u5bf9\u5bb9\u6613\uff0c\u53d1\u52a8\u7684\u653b\u51fb\u89c4\u6a21\u4e0d\u65ad\u6269\u5927\uff0c\u80fd\u591f\u4f7f\u7528\u8f83\u4f4e\u6210\u672c\u8f7b\u6613\u7684\u9020\u6210\u76ee\u6807\u7f51\u7edc\u7684\u762b\u75ea\u3002\u6210\u4e3a\u4e92\u8054\u7f51\u4e0a\u6700\u5e7f\u6cdb\u548c\u5371\u5bb3\u6700\u5927\u7684\u5b89\u5168\u5a01\u80c1\u4e4b\u4e00\uff0c\u8ba9\u5e7f\u5927\u7ad9\u957f\u670b\u53cb\u5934\u75bc\u4e0d\u5df2\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e0d\u5e78\u7684\u662f\uff0c\u76ee\u524d\u6700\u6709\u6548\u7684DDoS\u653b\u51fb\u68c0\u6d4b\u9632\u5fa1\u90fd\u8fd8\u4f9d\u9760\u6602\u8d35\u7684\u4e13\u7528\u786c\u4ef6\u9632\u5fa1\u8bbe\u5907\u8fdb\u884c\uff0c\u5bf9\u4e8e\u4e1a\u5185\u5e7f\u6cdb\u7684\u4e2d\u5c0f\u4f01\u4e1a\u548c\u7ad9\u957f\u670b\u53cb\u6765\u8bf4\u663e\u5f97\u96be\u4ee5\u8d1f\u62c5\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u672c\u6587\u4e2d\u7b14\u8005\u6574\u7406\u4e86\u4e00\u4e9b\u5178\u578b\u7684DDoS\u653b\u51fb\u6570\u636e\u5305\uff0c\u901a\u8fc7wireshark\u8fdb\u884c\u7b80\u6613\u7684\u5206\u6790\uff0c\u80fd\u591f\u5bf9\u653b\u51fb\u6570\u636e\u5305\u7684\u6784\u6210\u548c\u7279\u5f81\u8fdb\u884c\u7c97\u7565\u5206\u6790\u3002\u901a\u8fc7\u7b80\u5355\u7684\u5206\u6790\u6293\u5305\u6587\u4ef6\u8ba4\u5b9a\u653b\u51fb\u7684\u53d1\u751f\u548c\u786e\u5b9a\u7b80\u5355\u800c\u884c\u4e4b\u6709\u6548\u7684\u9632\u5fa1\u63aa\u65bd\uff0c<strong>\u9002\u7528\u4e8e\u5728\u6ca1\u6709\u4e13\u7528\u8bbe\u5907\u7684\u60c5\u51b5\u4e0b\u6700\u5927\u7a0b\u5ea6\u548c\u653b\u51fb\u8005\u6597\u667a\u6597\u52c7<\/strong>\uff0c\u51cf\u5c11\u653b\u51fb\u5f71\u54cd\u548c\u964d\u4f4e\u635f\u5931\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>SYN Flood<\/h2>\n<h2><\/h2>\n<p>1\u3001\u00a0\u00a0\u4f7f\u7528wireshark\u00a0\u8fc7\u6ee4\u5668tcp.flags==0x02\u00a0\u8fc7\u6ee4\u68c0\u67e5\u6570\u636e\u5305\u5206\u5e03\u60c5\u51b5\u3002\u5982\u56fe\u6240\u793a\uff0cSYN Flood\u653b\u51fb\u53d1\u751f\u65f6\u6570\u636e\u5305\u5206\u5e03\u53d1\u751f\u660e\u663e\u6539\u53d8\uff0cSyn\u5305\u6bd4\u4f8b\u660e\u663e\u589e\u52a0\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/security.tencent.com\/uploadimg_dir\/201208\/54902555089a3b6ec99107b12ee25b7f.gif\" alt=\"\" \/><br \/>\n2\u3001\u00a0\u00a0\u4f7f\u7528wireshark static-&gt;ipv4-&gt;endpoint\u5206\u6790\u6570\u636e\u5305\u6e90\u5730\u5740\u5206\u5e03\u3002\u5f53\u4f7f\u7528\u4f2a\u9020IP\u5730\u5740\u7684DDoS\u653b\u51fb\u53d1\u751f\u65f6\uff0c\u6293\u5305\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u5305\u6570\u76ee\u548c\u6e90\u5730\u5740\u5bf9\u5e94\u5173\u7cfb\u4f1a\u53d1\u751f\u660e\u663e\u53d8\u5316\u3002\u4ece\u56fe\u4e2d\u5b9e\u4f8b\u53ef\u4ee5\u53d1\u73b0\uff0c\u9664\u4e86\u88ab\u653b\u51fb\u7684\u76ee\u7684IP\u610f\u5916\uff0cwireshark\u7edf\u8ba1\u6bcf\u4e2a\u6e90\u5730\u5740\u5bf9\u5e94\u7684\u6570\u636e\u5305\u6570\u76ee\u8f83\u5c0f\uff0c\u6570\u636e\u5305\u5927\u5c0f\u5b57\u8282\u6570\uff08Bytes\uff09\u51e0\u4e4e\u4e00\u81f4\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/security.tencent.com\/uploadimg_dir\/201208\/530ca7e9326b1e1cc6deeb39daa9e467.gif\" alt=\"\" \/><br \/>\n3\u3001TTL\u5206\u6790\u53d1\u73b0\u653b\u51fb\u8005\u7684\u86db\u4e1d\u9a6c\u8ff9\u3002\u5f53\u4f7f\u7528\u968f\u673a\u6e90\u8fdb\u884cDDoS\u653b\u51fb\u65f6\uff0c\u867d\u7136\u4f7f\u7528\u4e86\u4f2a\u9020\u6e90\u5730\u5740\u8fdb\u884c\u653b\u51fb\uff0c\u4f46\u653b\u51fb\u8005\u65e0\u6cd5\u4f2a\u9020\u653b\u51fb\u4e3b\u673a\u4e0e\u76ee\u6807\u4e3b\u673a\u4e4b\u95f4\u7684\u4f4d\u7f6e\u5173\u7cfb\u3002\u6709\u65f6\u5019\u901a\u8fc7\u89c2\u5bdf\u6570\u636e\u5305\u7684TTL\u503c\u53d8\u5316\uff0c\u4e5f\u80fd\u591f\u83b7\u5f97\u653b\u51fb\u8005\u7684\u86db\u4e1d\u9a6c\u8ff9\uff0c\u4e3a\u653b\u51fb\u9632\u5fa1\u63d0\u4f9b\u8f85\u52a9\u652f\u6301\u3002\u4e0b\u56fe\u6240\u793a\u7684\u8fd9\u4e2a\u653b\u51fb\u7a0b\u5e8f\u5e76\u6ca1\u6709\u4fee\u6539\u653b\u51fb\u6570\u636e\u5305\u7684TTL\u503c\uff0c\u6240\u6709\u7684\u653b\u51fb\u6570\u636e\u5305\u4f7f\u7528\u76f8\u540c\u7684TTL\u503c\u3002\u806a\u660e\u7684\u4f60\u53ef\u80fd\u5df2\u7ecf\u53d1\u73b0\u4e86\uff0c\u6ca1\u9519\uff0c\u8fd9\u4e2a\u653b\u51fb\u6570\u636e\u5305\u662f\u7531\u5c40\u57df\u7f51\u5185\u7684\u4e00\u4e2awindows\u8ba1\u7b97\u673a\u53d1\u51fa\u7684\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/security.tencent.com\/uploadimg_dir\/201208\/102d2ac20d2ad3a1717722b213521b48.gif\" alt=\"\" \/><\/p>\n<h2>UDP FLOOD<\/h2>\n<h2><\/h2>\n<p>UDP FLOOD\u653b\u51fb\u7684\u4e3b\u8981\u76ee\u7684\u662f\u901a\u8fc7\u53d1\u9001\u5927\u91cf\u7684UDP\u6570\u636e\u5305\u6765\u5835\u585e\u670d\u52a1\u5668\u7684\u5e26\u5bbd\u3002\u540c\u65f6\u9488\u5bf9DNS\u00a0\uff0c\u8bed\u97f3\u548c\u6d41\u5a92\u4f53\u7b49\u4e92\u8054\u7f51\u4e1a\u52a1\uff0c\u4e5f\u4f1a\u6709\u901a\u8fc7UDP\u627f\u8f7d\u7684\u5e94\u7528\u5c42\u653b\u51fb\u51fa\u73b0\u3002\u56fe\u793a\u662f\u8457\u540d\u7684\u8717\u725b\u653b\u51fb\u5668\u4ea7\u751f\u7684\u653b\u51fb\u6570\u636e\u5305\uff0c\u53ef\u4ee5\u660e\u663e\u7684\u770b\u51fa\uff0c\u8fd9\u79cd\u6570\u636e\u5305\u7684payload\u56fa\u5b9a\uff0c\u4f7f\u7528UDP\u5927\u5305\u8fdb\u884c\u653b\u51fb\uff0c\u540c\u65f6\u4f7f\u7528\u771f\u5b9e\u6e90\u5730\u5740\u8fdb\u884c\u653b\u51fb\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/security.tencent.com\/uploadimg_dir\/201208\/2f1ee369d8c38eefbc960d012c054b63.gif\" alt=\"\" \/><\/p>\n<h2>ICMP FLOOD<\/h2>\n<h2><\/h2>\n<p>\u4e0eUDP FLOOD\u76f8\u540c\uff0cICMP FLOOD\u4e3b\u8981\u4ee5\u963b\u585e\u670d\u52a1\u5668\u5e26\u5bbd\u4e3a\u4e3b\u3002\u4f46\u4e0eUDP FLOOD\u4e0d\u540c\u7684\u662f\uff0cICMP\u901a\u5e38\u4e0d\u4f1a\u627f\u8f7d\u6570\u636e\u4e1a\u52a1\uff0c\u6bd4\u8f83\u5bb9\u6613\u901a\u8fc7\u4ea4\u6362\u673aACL\u6216\u8005\u670d\u52a1\u5668\u7684iptables\u7b49\u8fdb\u884c\u9632\u5fa1\u3002\u540c\u65f6\uff0c\u653b\u51fb\u5b9e\u65bd\u8005\u4e3a\u4e86\u66f4\u52a0\u6709\u6548\u7684\u5229\u7528\u624b\u4e0a\u7684\u50f5\u5c38\u4e3b\u673a\uff0c\u4f1a\u4f7f\u7528\u5305\u5927\u5c0f\u8f83\u5927\u7684\u6570\u636e\u5305\u548cIP\u5c42\u5206\u7247\u7684\u6570\u636e\u5305\u8fdb\u884c\u653b\u51fb\uff0c\u8fd9\u79cd\u653b\u51fb\u4f1a\u7ed5\u8fc7\u6ca1\u6709\u8bbe\u7f6eIP\u5c42\u5206\u914d\u7684ACL\uff0c\u4e5f\u4f1a\u52a0\u91cd\u670d\u52a1\u5668\u5206\u914d\u91cd\u7ec4\u7684\u8d1f\u62c5\u3002\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0cwindow\u5ba2\u6237\u7aef\u53d1\u51fa\u7684ping\u6570\u636e\u5305\u6709\u7279\u5b9a\u7684\u683c\u5f0f\u548c\u6570\u636e\u5305\u5927\u5c0f\uff0c\u4f7f\u7528\u901a\u7528\u7684\u505a\u767d\u903b\u8f91\u8fdb\u884c\u9632\u5fa1\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u4e5f\u662f\u6709\u6548\u7684\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/security.tencent.com\/uploadimg_dir\/201208\/347457e24662206974bbc2ba31809357.gif\" alt=\"\" \/><br \/>\n\u4e0a\u56fe\u4e2d\u7684\u6570\u636e\u5305\u662f\u4e00\u4e2a\u5178\u578b\u7684UDP FLOOD\u653b\u51fb\u6570\u636e\u5305\uff0c\u6570\u636e\u5305\u5927\u5c0f\u4e3a1514Byte\uff0cpayload\u56fa\u5b9a\uff0c\u540c\u65f6\u4f7f\u7528\u4e86\u5206\u7247\u6807\u5fd7\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u6765\u81ea\u5e94\u7528\u5c42\u7684DDoS<\/h2>\n<h2><\/h2>\n<p>\u9664\u4e86\u4f20\u7edf\u7684\u7f51\u7edc\u5c42\u653b\u51fb\u4e4b\u5916\uff0c\u4e00\u4e9b\u9488\u5bf9\u7279\u5b9a\u5e94\u7528\u7cfb\u7edf\u6bd4\u5982apache\u7684\u5e94\u7528\u5c42\u653b\u51fb\u4e5f\u80fd\u591f\u53d6\u5f97\u5f88\u597d\u7684\u6548\u679c\u3002\u4f8b\u5982CVE-2011-3192 Range header DoS vulnerability Apache HTTPD\uff0c\u662f\u5178\u578b\u7684\u4f7f\u7528\u5e94\u7528\u5c42\u6f0f\u6d1e\u8fdb\u884cDDoS\u653b\u51fb\u7684\u653b\u51fb\u65b9\u6cd5\u3002\u5728\u8fd9\u79cd\u653b\u51fb\u4e2d\uff0c\u653b\u51fb\u8005\u523b\u610f\u6784\u9020\u7578\u5f62\u7684http\u5934\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u5927\u91cf\u91cd\u590d\u7684range\u5b57\u6bb5\u3002Apach\u5728\u5904\u7406\u8fd9\u79cdhttp\u8bf7\u6c42\u65f6\uff0c\u4f1a\u4e0d\u65ad\u7684\u8fdb\u884crange\u91cd\u7ec4\uff0c\u6700\u7ec8\u5bfc\u81f4\u76ee\u6807\u7cfb\u7edfCPU\u7e41\u5fd9\u800c\u65e0\u6cd5\u54cd\u5e94\u6b63\u5e38\u8bf7\u6c42\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/security.tencent.com\/uploadimg_dir\/201208\/a47acdaa00292e6f8c8b7e63756be114.gif\" alt=\"\" \/><br \/>\n&nbsp;<\/p>\n<h2>\u6b63\u5e38\u6d41\u91cfTTL\u5206\u5e03\u6027\u8d28<\/h2>\n<p>&nbsp;<\/p>\n<p>\u5728\u8bb2synflood\u00a0\u7684\u65f6\u5019\u5df2\u7ecf\u63d0\u5230\uff0c\u53ef\u4ee5\u901a\u8fc7\u5206\u6790\u6570\u636e\u5305\u7684TTL\u503c\u5206\u5e03\u60c5\u51b5\u5bf9\u662f\u5426\u53d1\u751f\u653b\u51fb\u8fdb\u884c\u7b80\u8981\u5224\u65ad\u3002\u4f46\u662f\u5728\u5b9e\u9645\u64cd\u4f5c\u65f6\u4e0d\u5bb9\u6613\u627e\u5230\u73b0\u7f51\u4e2dTTL\u503c\u7684\u5206\u5e03\u89c4\u5f8b\uff0c\u6216\u8005\u9700\u8981\u5f88\u957f\u65f6\u95f4\u8bad\u7ec3\u624d\u80fd\u660e\u786e\u3002\u901a\u8fc7\u5bf9\u73b0\u7f51\u4e2d\u6d41\u91cf\u8fdb\u884c\u6d4b\u91cf\u5206\u6790\uff0c\u80fd\u591f\u5f97\u51fa\u73b0\u7f51\u4e2d\u6b63\u5e38\u6d41\u91cfTTL\u5206\u5e03\u6027\u8d28\uff0c\u672c\u6587\u4f5c\u8005\u5bf9\u56fd\u5185\u5916\u73b0\u7f51\u6d4b\u91cf\u5b9e\u9a8c\u7ed3\u8bba\u8fdb\u884c\u4e86\u7b80\u8981\u6574\u7406\uff0c\u6574\u7406\u51fa\u6027\u8d28\u5982\u4e0b\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>1\u3001\u67d0\u4e00\u6761\u94fe\u8def\u4e0a\u7684\u5165\u5883\u6570\u636e\u5305\u6e90IP\u5730\u5740\u6570\u76ee\u5728\u4e0d\u540cTTL\u503c\u4e0a\u7684\u5206\u5e03\u57fa\u672c\u4fdd\u6301\u7a33\u5b9a\uff0c\u4f46\u5bf9\u6574\u4e2a\u89c2\u6d4b\u533a\u95f4\u5185\u5165\u5883\u6570\u636e\u5305\u6e90IP\u5730\u5740\u603b\u6570\u7684\u6d4b\u91cf\u663e\u793a\uff1a\u5728\u5f53\u524d\u7f51\u7edc\u73af\u5883\u4e0b\uff0c\u5165\u5883\u6570\u636e\u5305IP\u5730\u5740\u6570\u76ee\u4e0d\u4f1a\u5728\u8f83\u77ed\u65f6\u95f4\u5185\u589e\u52a0\u5230\u9971\u548c\u8d8b\u52bf\uff0c\u800c\u662f\u5728\u6bd4\u8f83\u957f\u65f6\u95f4\u5185\u4fdd\u6301\u8fd1\u4f3c\u5e38\u6570\u7684\u589e\u957f\u901f\u7387\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/security.tencent.com\/uploadimg_dir\/201208\/ec2c70f0d4b7837f2b14dc936cee2979.gif\" alt=\"\" \/><br 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href=\"http:\/\/security.tencent.com\/index.php\/blog\/msg\/3\">http:\/\/security.tencent.com\/index.php\/blog\/msg\/3<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u535a\u6587\u4f5c\u8005\uff1aBigHy[TSRC] \u53d1\u5e03\u65e5\u671f\uff1a2012-08-01 \u535a\u6587\u5185\u5bb9\uff1a &#038; &hellip;<\/p>\n<p class=\"read-more\"><a href=\"http:\/\/zerobox.org\/notes\/832.html\">\u7ee7\u7eed\u9605\u8bfb &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[201],"class_list":["post-832","post","type-post","status-publish","format-standard","hentry","tag-wireshark"],"views":928,"_links":{"self":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/posts\/832","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/comments?post=832"}],"version-history":[{"count":0,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/posts\/832\/revisions"}],"wp:attachment":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/media?parent=832"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/categories?post=832"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/tags?post=832"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}