{"id":1755,"date":"2013-04-28T09:58:05","date_gmt":"2013-04-28T01:58:05","guid":{"rendered":"http:\/\/www.yewen.us\/blog\/?p=1755"},"modified":"2014-06-03T09:43:27","modified_gmt":"2014-06-03T01:43:27","slug":"defense-strange-requests","status":"publish","type":"post","link":"https:\/\/www.yewen.us\/blog\/2013\/04\/defense-strange-requests\/","title":{"rendered":"\u5947\u602a\u6d41\u91cf\u7684\u7ec8\u7ed3"},"content":{"rendered":"

\u66fe\u7ecf\u6709\u7206\u6d41\u91cf\u8bb0<\/a>\u8fd9\u4e00\u7bc7\u535a\u6587\u63d0\u5230\u4e4b\u524d\u79df\u7684\u7a7a\u95f4\u88ab\u4e0b Win7 \u7684\u8bf7\u6c42\u7206\u6d41\u91cf, \u5728\u8fc1\u5230\u81ea\u5df1\u7684 VPS \u540e\u53d1\u73b0\u8fd8\u662f\u6709\u5bf9 Win7 \u7684\u8bf7\u6c42, \u8fd8\u9644\u52a0\u4e86\u4e00\u4e2a\u5947\u602a\u7684\u9694\u4e00\u5c0f\u4f1a\u5c31\u53d1\u4e2a HEAD \u8bf7\u6c42, UA \u4e2d\u5e26 QQDownload \u7684\u5947\u602a\u6765\u6e90 (BuyVM VPS \u5b89\u88c5\u4f18\u5316\u8bb0<\/a>)<\/p>\n

\u4f5c\u4e3a\u65e5\u5fd7\u6d01\u7656\u8005\u770b\u7740 nginx \u7684 access.log \u91cc\u90fd\u662f\u8fd9\u79cd\u8bf7\u6c42\u90a3\u81ea\u7136\u662f\u5404\u79cd\u4e0d\u723d, \u4e4b\u524d\u4e00\u76f4\u6000\u7591 Win7 \u7684\u8bf7\u6c42\u6765\u81ea\u65cb\u98ce\u6216\u8fc5\u96f7, \u4f46\u82e6\u4e8e\u6728\u6709\u8bc1\u636e, \u8fd9\u6b21\u7279\u610f\u53c8\u53bb\u67e5\u4e86\u4e0b\u65cb\u98ce\u548c\u8fc5\u96f7\u7684\u79bb\u7ebf\u670d\u52a1\u5668\u5217\u8868 (\u6bd4\u5982\u767e\u5ea6\u7a7a\u95f4\u4e0a\u7528\u4e8e eMule \u907f\u514d\u5438\u8840\u7684\u8fd9\u7bc7: http:\/\/hi.baidu.com\/asp502010\/item\/44ac169b289dd2d91a49df6d<\/a>), \u5bf9\u6bd4\u4e86\u4e0b IP \u8303\u56f4, \u8fd8\u662f\u4e0d\u5728\u91cc\u9762, \u6709\u70b9\u5931\u671b<\/p>\n

\u4e0d\u8fc7\u8fd9\u6b21\u6709\u610f\u5916\u53d1\u73b0, \u90a3\u5c31\u662f UA \u91cc\u5e26 QQDownload \u7684\u90a3\u4e2a, \u867d\u7136\u6211\u77e5\u9053\u8fd9\u4e2a UA \u4e32\u672a\u5fc5\u5c31\u662f\u65cb\u98ce\u53d1\u6765\u7684, \u53ef\u80fd\u4e5f\u53ea\u662f\u8001\u7248\u672c\u65cb\u98ce (\u8fd9\u6b21 UA \u662f\u91cc\u7248\u672c\u53f7\u662f 713, \u6211\u770b\u4e86\u4e0b\u6700\u65b0\u7684\u65cb\u98ce\u5e94\u8be5\u662f 783) \u5b89\u88c5\u540e\u6539\u4e86\u7cfb\u7edf\u7684 UA \u4e32, \u4f46\u4e0d\u7ba1\u600e\u6837\u603b\u662f\u6709\u53ef\u4ee5\u80e1\u6405\u86ee\u7f20\u7684\u7531\u5934, \u4e8e\u662f\u901a\u8fc7\u4e4b\u524d\u5728\u65cb\u98ce\u5b9e\u4e60\u8fc7\u7684 momodi \u8054\u7cfb\u4e0a\u65cb\u98ce\u7684\u5de5\u7a0b\u5e08, \u76f4\u63a5\u5410\u69fd<\/p>\n

\u53f6\u6587\/Snoopy\u963f\u6392 15:43:29
\nhi, \u975e\u5e38\u62b1\u6b49\u5192\u6627\u6253\u6270<\/p>\n

\u6211\u78b0\u5230\u7684\u95ee\u9898\u662f\u8fd9\u6837\u7684:
\n\u6211\u81ea\u5df1\u6709\u4e00\u4e2a\u57df\u540d yewen.us, \u66fe\u7ecf\u6307\u5411\u6211\u524d\u516c\u53f8\u5185\u7f51\u91cc\u7684\u4e00\u53f0\u673a\u5668, \u63d0\u4f9b\u524d\u516c\u53f8\u53ef\u6fc0\u6d3b\u7684 windows 7 iso \u6587\u4ef6\u4e0b\u8f7d, \u53ef\u80fd\u88ab\u524d\u540c\u4e8b\u7528\u4e0d\u540c\u7684\u4e0b\u8f7d\u5de5\u5177 (\u5982\u65cb\u98ce, \u8fc5\u96f7\u7b49) \u4e0b\u8f7d\u8fc7, \u5e76\u88ab\u8ba1\u5165\u94fe\u63a5\u5e93, \u4e8e\u662f\u4e00\u76f4\u6709\u5916\u90e8\u8bf7\u6c42\u6765\u4e0b\u8fd9\u4e2a\u6587\u4ef6
\n\u4f46\u662f\u6211\u4e00\u5e74\u591a\u524d\u5c31\u79fb\u9664\u4e86\u8fd9\u4e2a\u6587\u4ef6, \u5bf9\u5e94\u7684\u4e0b\u8f7d\u8bf7\u6c42\u90fd\u8fd4\u56de 404, \u4f46\u4e00\u76f4\u8fd8\u5728\u88ab\u6293 (\u540e\u6765\u6ca1\u529e\u6cd5\u8fd8\u6539\u8fc7 302, 416 \u7b49\u9519\u8bef\u8fd4\u56de\u7801, \u90fd\u65e0\u6548)<\/p>\n

\u6700\u8fd1\u6211\u4ed4\u7ec6\u770b\u4e86\u4e0b\u6211 nginx \u7684\u65e5\u5fd7, \u6700\u8fd1\u6709\u5927\u91cf\u5e26 QQDownload \u6807\u8bc6\u7684\u8bf7\u6c42, \u540c\u65f6\u8bf7\u6c42\u90a3\u4e2a win7 iso \u7684\u91cf\u4e5f\u5f88\u5927, \u6240\u4ee5\u6000\u7591\u662f\u4e0d\u662f QQ \u65cb\u98ce\u6ca1\u6709\u6b63\u786e\u5904\u7406\u9519\u8bef\u8fd4\u56de\u7801, \u4e00\u76f4\u6ca1\u628a\u8fd9\u4e2a\u5df2\u5931\u6548\u7684\u5730\u5740\u53bb\u9664<\/p>\n

\u4e4b\u524d\u5199\u8fc7\u4e00\u7bc7 blog \u6765\u5206\u6790: http:\/\/www.yewen.us\/blog\/2012\/02\/overflow\/<\/p>\n

\u4ece\u6628\u5929\u665a\u4e0a\u5230\u4eca\u5929\u4e0a\u5348\u7684 nginx \u65e5\u5fd7\u5206\u6790:
\n$ grep “QQDownload” vyewenus.access.log | awk ‘{cnt[$1]++};END{for(ip in cnt){print ip, cnt[ip]}}’ | sort
\n101.226.68.137 196
\n140.207.54.139 195
\n183.195.232.138 196
\n$ grep “cn_windows_7_professional_x86_dvd_x15-65790” vyewenus.access.log | awk ‘{cnt[$1]++};END{for(ip in cnt){print ip, cnt[ip]}}’ | sort
\n122.141.67.50 329
\n123.185.52.73 54
\n14.114.226.18 150
\n14.114.226.194 14677
\n14.115.129.55 4040
\n180.117.68.185 361
\n59.33.63.137 1476<\/p>\n

\u62bd\u51e0\u6761\u5b8c\u6574\u65e5\u5fd7\u5982\u4e0b:
\n101.226.68.137 – – [21\/Apr\/2013:19:44:18 +0800] “HEAD \/ HTTP\/1.1” 200 0 “-” “Mozilla\/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident\/4.0; QQDownload 713; .NET CLR 2.0.50727; InfoPath.2)”
\n14.115.129.55 – – [21\/Apr\/2013:19:44:18 +0800] “GET \/ftp\/Win7_rtm_with_loader\/cn_windows_7_professional_x86_dvd_x15-65790.iso HTTP\/1.1” 416 615 “http:\/\/yewen.us\/” “Mozilla\/4.0 (compatible; MSIE 9.0; Windows
\nNT 6.1; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729)”
\n14.115.129.55 – – [21\/Apr\/2013:19:44:22 +0800] “GET \/ftp\/Win7_rtm_with_loader\/cn_windows_7_professional_x86_dvd_x15-65790.iso HTTP\/1.1” 416 615 “http:\/\/yewen.us\/” “Mozilla\/4.0 (compatible; MSIE 9.0; Windows
\nNT 6.1; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729)”
\n14.115.129.55 – – [21\/Apr\/2013:19:44:25 +0800] “GET \/ftp\/Win7_rtm_with_loader\/cn_windows_7_professional_x86_dvd_x15-65790.iso HTTP\/1.1” 416 615 “http:\/\/yewen.us\/” “Mozilla\/4.0 (compatible; MSIE 9.0; Windows
\nNT 6.1; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729)”
\n\u53f6\u6587\/Snoopy\u963f\u6392 15:44:00 <\/p>\n

\u8bf7\u5e2e\u9a8c\u8bc1\u4e0b\u90a3\u51e0\u4e2a\u5927\u91cf\u8bf7\u6c42\u7684 IP \u5730\u5740\u662f\u5426\u662f\u65cb\u98ce\u79bb\u7ebf\u670d\u52a1\u5668\u53d1\u8d77\u7684<\/p>\n

QQ\u65cb\u98ce 15:44:19
\n\u4f60\u80fd\u5426\u81ea\u5df1\u5c4f\u853d\u4e86\uff1f<\/p>\n

\u53f6\u6587\/Snoopy\u963f\u6392 15:46:01
\n\u6211\u73b0\u5728\u5df2\u7ecf\u8fd4\u56de 416 \u9519\u8bef\u7801\u4e86, \u6d41\u91cf\u4e5f\u4e0d\u662f\u592a\u5927\u95ee\u9898, \u53ea\u662f\u5f88\u5947\u602a\u4e3a\u4ec0\u4e48\u6211\u90fd\u8fd4\u56de\u9519\u8bef\u7801\u4e00\u5e74\u591a\u4e86\u8fd8\u5728\u88ab\u6293, \u800c\u4e14 IP \u4e0d\u4e00\u5b9a\u56fa\u5b9a (\u6211\u6000\u7591\u53ef\u80fd\u5b58\u5728 “\u67d0\u4e0b\u8f7d\u5de5\u5177\u7684\u5730\u5740\u5e93\u5b58\u4e86\u8fd9\u4e2a\u94fe\u63a5, \u7528\u6237\u53ef\u80fd\u4f1a\u76f4\u63a5\u8bf7\u6c42” \u7684\u60c5\u51b5)<\/p><\/blockquote>\n

\u540e\u9762\u7684\u6c9f\u901a\u57fa\u672c\u5c31\u662f\u793c\u8282\u6027\u7684\u518d\u63d0\u4f9b\u70b9\u8bc1\u636e, \u65cb\u98ce\u7684\u5de5\u7a0b\u5e08\u6ca1\u76f4\u8bf4\u8fd9\u51e0\u4e2a\u8bf7\u6c42\u662f\u5426\u662f\u65cb\u98ce\u81ea\u5df1\u7684, \u53ea\u8bf4\u53ef\u80fd\u5e93\u91cc\u786e\u5b9e\u6709\u810f\u6570\u636e, \u7ed9\u6211\u770b\u770b, \u81f3\u4e8e\u8001\u7248\u672c\u5982\u679c\u6709\u7f13\u5b58\u4e86\u8fd9\u4e2a\u4fe1\u606f, \u90a3\u5c31\u6ca1\u529e\u6cd5\u4e86. \u9694\u5929\u65e9\u4e0a\u8054\u7cfb\u6211\u8bf4\u786e\u5b9e\u4ece\u5e93\u91cc\u627e\u5230\u8fd9\u4e48\u4e00\u6761\u8bb0\u5f55, \u5df2\u7ecf\u5220\u9664, \u8ba9\u6211\u518d\u770b\u770b\u65e5\u5fd7, \u8fd9\u6b21\u8fc7\u53bb\u770b\u4e86\u4e0b, \u679c\u7136\u5bf9 win7 \u7684\u6240\u6709\u8bf7\u6c42\u90fd\u6ca1\u4e86<\/p>\n

\u8fd9\u4e2a\u4e8b\u5e94\u8be5\u5c31\u7b97\u89e3\u51b3\u4e86, \u4e4b\u524d\u867d\u7136\u6709\u6000\u7591\u4f46\u4e00\u76f4\u6ca1\u53bb\u4ed8\u8bf8\u884c\u52a8, \u679c\u7136\u6709\u95ee\u9898\u76f4\u63a5\u627e\u5230\u5de5\u7a0b\u5e08\u624d\u7b97\u6bd4\u8f83\u5feb\u7684\u89e3\u51b3\u65b9\u6cd5, \u50cf\u6211\u8fd9\u79cd “\u5201\u6c11” \u5e94\u8be5\u4e5f\u4f1a\u7ed9\u4ed6\u4eec\u5e26\u6765\u8ba1\u5212\u5916\u5de5\u4f5c\u91cf, \u4e0d\u8fc7\u786e\u5b9e\u662f\u81ea\u5bb6 bug \u90a3\u4e5f\u6ca1\u4ec0\u4e48\u597d\u8bf4\u7684, \u4e0a\u6b21\u63d0\u5230\u90a3\u4e2a\u591a\u8bf4\u8bc4\u8bba\u663e\u793a\u9519\u8bef\u7684\u95ee\u9898, \u6700\u540e\u4e5f\u662f\u627e\u591a\u8bf4\u5de5\u7a0b\u5e08\u76f4\u63a5\u89e3\u51b3. \u65cb\u98ce\u7684\u54e5\u4eec\u5e2e\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u540e\u8fd8\u5f88\u597d\u5947\u7684\u95ee\u4e86\u53e5, \u4f60\u8fd8\u5173\u6ce8\u65e5\u5fd7\u554a, er, \u53ef\u4ee5\u8bf4\u8fd9\u5df2\u7ecf\u6210\u804c\u4e1a\u75c5\u4e86\u4e48, \u4e92\u76f8\u5475\u5475\u4e86\u4e0b\u4e5f\u5c31\u7ed3\u4e86<\/p>\n

\u8fc7\u4e86\u4e24\u5929\u53d1\u73b0\u90a3\u4e2a\u5947\u602a\u7684 UA \u4e32\u53d1\u6765\u7684 HEAD \u8bf7\u6c42\u8fd8\u6709, \u8fd9\u6b21\u518d\u95ee\u65cb\u98ce\u90a3\u8fb9\u4ed6\u4eec\u5c31\u4e5f\u4e0d\u77e5\u9053\u600e\u4e48\u56de\u4e8b\u4e86, \u653e Google \u641c\u4e86\u4e0b\u627e\u5230 http:\/\/www.postsila.com\/thread-193359-1-1.html<\/a> \u8fd9\u4e48\u4e00\u7bc7, \u8ddf\u6211\u9047\u5230\u4e00\u6837\u7684\u95ee\u9898, \u4e5f\u4e0d\u660e\u6240\u4ee5, \u4e0d\u8fc7\u8fd8\u597d\u8fd9\u4e2a\u8bf7\u6c42\u6765\u6e90\u6bd4\u8f83\u56fa\u5b9a, \u4ece access.log \u91cc\u641c\u4e86\u4e0b\u5bf9\u5e94 IP \u9664\u4e86\u53d1 HEAD \u8bf7\u6c42\u6ca1\u6709\u4efb\u4f55\u6b63\u5e38\u7528\u6237\u884c\u4e3a, \u90a3\u5c31\u5f00 iptables \u5c4f\u853d\u6389\u5c31\u884c\u4e86<\/p>\n

$ sudo \/sbin\/iptables -I INPUT -s 101.226.68.137 -j DROP<\/pre>\n
\u5c01\u4e86\u51e0\u5929\u518d\u770b\u65e5\u5fd7, \u8fd8\u5728\u8bf7\u6c42, \u672c\u6765\u8fd8\u60f3 ws \u7684\u901a\u8fc7 dnspod \u80fd\u4e0d\u80fd\u76f4\u63a5\u62d2\u7edd\u6389, \u7814\u7a76\u4e86\u4e0b dns \u771f\u5e72\u4e0d\u4e86\u8fd9\u4e8b. \u7b97\u4e86\u7b97\u4e86, \u81ea\u5df1\u90fd\u5c4f\u853d\u6389\u4e86\u90a3\u5c31\u8fd9\u6837\u5427, \u770b\u4e0b\u65e5\u5fd7\u8fd8\u5728\u6da8<\/p>\n
$ sudo \/sbin\/iptables -L -n -v --line-numbers\r\nChain INPUT (policy ACCEPT 529K packets, 835M bytes)\r\nnum   pkts bytes target     prot opt in     out     source               destination\r\n1     3311  199K DROP       all  --  *      *       183.195.232.138      0.0.0.0\/0\r\n2     3229  194K DROP       all  --  *      *       140.207.54.139       0.0.0.0\/0\r\n3     3304  198K DROP       all  --  *      *       101.226.68.137       0.0.0.0\/0<\/pre>\n
\u9664\u6389\u8fd9\u4fe9\u540e\u518d\u770b\u65e5\u5fd7, \u6700\u5927\u7684\u6765\u6e90\u5c31\u662f dnspod \u7684\u5b9a\u65f6\u76d1\u63a7\u548c\u5404\u641c\u7d22\u5f15\u64ce\u548c Feed \u8ba2\u9605\u5668\u7684\u6293\u7ad9. \u60f3\u4e86\u4e0b\u5c0f\u7834\u7ad9\u6302\u5c31\u6302, \u6ca1\u90a3\u4e48\u4e25\u82db\u7684\u53ef\u7528\u65f6\u95f4\u8981\u6c42, \u53bb dnspod \u628a\u76d1\u63a7\u95f4\u9694\u8c03\u5230\u6700\u957f, \u641e\u5b9a<\/p>\n
\u6700\u540e, \u770b\u4e86\u4e0b\u4e4b\u524d\u79df\u7684\u7a7a\u95f4\u8fd8\u6709\u6d41\u91cf, \u518d\u6253\u5f00\u65e5\u5fd7, \u53d1\u73b0\u90fd\u662f\u6765\u81ea youdao \u722c\u866b\u7684\u6570\u636e, \u8bdd\u8bf4\u6211\u90fd\u6362\u4e86\u57df\u540d IP \u6307\u5411\u4e00\u5468\u4e86, \u600e\u4e48\u4f60\u4eec\u8fd8\u5728\u6293\u4ee5\u524d IP \u554a, DNS \u4e0d\u66f4\u65b0\u4e48<\/p>\n","protected":false},"excerpt":{"rendered":"
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