{"id":37,"date":"2013-09-13T15:47:07","date_gmt":"2013-09-13T15:47:07","guid":{"rendered":""},"modified":"2013-09-13T15:47:07","modified_gmt":"2013-09-13T15:47:07","slug":"","status":"publish","type":"post","link":"http:\/\/weizn.net\/?p=37","title":{"rendered":"C\u8bed\u8a00\u7f16\u7a0b\u6765\u4f7f\u7f51\u5361\u5de5\u4f5c\u5728\u6df7\u6742\u6a21\u5f0f"},"content":{"rendered":"
\n\u4e00 \u524d\u8a00<\/p>\n

SNIFF\u771f\u662f\u4e00\u4e2a\u53e4\u8001\u7684\u8bdd\u9898\uff0c\u5173\u4e8e\u5728\u7f51\u7edc\u4e0a\u91c7\u7528SNIFF\u6765\u83b7\u53d6\u654f\u611f\u4fe1\u606f\u5df2\u7ecf\u4e0d\u662f\u4ec0\u4e48
\n\u65b0\u9c9c\u4e8b\uff0c\u4e5f\u4e0d\u4e4f\u5f88\u591a\u6210\u529f\u7684\u6848\u4f8b\uff0c\u90a3\u4e48\uff0cSNIFF\u7a76\u7adf\u662f\u4ec0\u4e48\u5462\uff1f SNIFF\u5c31\u662f\u55c5\u63a2\u5668\uff0c\u5c31\u662f
\n\u7a83\u542c\u5668\uff0cSNIFF\u9759\u6084\u6084\u7684\u5de5\u4f5c\u5728\u7f51\u7edc\u7684\u5e95\u5c42\uff0c\u628a\u4f60\u7684\u79d8\u5bc6\u5168\u90e8\u8bb0\u5f55\u4e0b\u6765\u3002\u770b\u8fc7\u5a01\u5c14\u53f2\u5bc6\u65af
\n\u6f14\u7684\u300a\u5168\u6c11\u516c\u654c\u300b\u5417\uff1fSNIFF\u5c31\u8c61\u91cc\u9762\u7cbe\u5de7\u7684\u7a83\u542c\u5668\u4e00\u6837\uff0c\u8ba9\u4f60\u9632\u4e0d\u80dc\u9632\u3002<\/p>\n

SNIFF\u53ef\u4ee5\u662f\u8f6f\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u662f\u786c\u4ef6\uff0c\u65e2\u7136\u662f\u8f6f\u4ef6\u90a3\u5c31\u8981\u5206\u5e73\u53f0\uff0c\u6709WINDOWS\u4e0b\u7684\u3001UNX
\nI
\n\u4e0b\u7684\u7b49\uff0c\u786c\u4ef6\u7684SNIFF\u79f0\u4e3a\u7f51\u7edc\u5206\u6790\u4eea\uff0c\u53cd\u6b63\u4e0d\u7ba1\u786c\u4ef6\u8f6f\u4ef6\uff0c\u76ee\u6807\u53ea\u6709\u4e00\u4e2a\uff0c\u5c31\u662f\u83b7\u53d6\u5728
\n\u7f51
\n\u7edc\u4e0a\u4f20\u8f93\u7684\u5404\u79cd\u4fe1\u606f\u3002\u672c\u6587\u4ec5\u4ec5\u4ecb\u7ecd\u8f6f\u4ef6\u7684SNIFF\u3002<\/p>\n

\u5f53\u4f60\u8212\u9002\u7684\u5750\u5728\u5bb6\u91cc\uff0c\u60ec\u610f\u7684\u4eab\u53d7\u7f51\u7edc\u7ed9\u4f60\u5e26\u6765\u7684\u4fbf\u5229\uff0c\u6536\u53d6\u4f60\u7684EMAIL\uff0c\u8d2d\u4e70\u4f60\u559c
\n\u6b22
\n\u7684\u7269\u54c1\u7684\u65f6\u5019\uff0c\u4f60\u662f\u5426\u4f1a\u60f3\u5230\u4f60\u7684\u670b\u53cb\u7ed9\u4f60\u7684\u4fe1\u4ef6\uff0c\u4f60\u7684\u4fe1\u7528\u5361\u5e10\u53f7\u53d8\u6210\u4e86\u4e00\u4e2a\u53c8\u4e00\u4e2a
\n\u7684
\n\u4fe1\u606f\u5305\u5728\u7f51\u7edc\u4e0a\u4e0d\u505c\u7684\u4f20\u9001\u7740\uff0c\u4f60\u662f\u5426\u66fe\u7ecf\u8fd9\u4e9b\u4fe1\u606f\u5305\u4f1a\u901a\u8fc7\u7f51\u7edc\u6d41\u5165\u522b\u4eba\u7684\u673a\u5668\u5462\uff1f
\n\u4f60
\n\u7684\u62c5\u5fe7\u4e0d\u662f\u6ca1\u6709\u9053\u7406\u7684\uff0c\u56e0\u4e3aSNIFF\u53ef\u4ee5\u8ba9\u4f60\u7684\u62c5\u5fe7\u53d8\u6210\u5b9e\u5b9e\u5728\u5728\u7684\u5371\u9669\u3002\u5c31\u597d\u8c61\u4e00\u4e2a\u4eba
\n\u8eb2
\n\u5728\u4f60\u8eab\u540e\u5077\u770b\u4e00\u6837\u3002\u3002\u3002\u3002\u3002\u3002<\/p>\n

\n\u4e8c \u7f51\u7edc\u57fa\u7840\u77e5\u8bc6<\/p>\n

\u201c\u7f51\u7edc\u57fa\u7840\u77e5\u8bc6\u201d\uff0c\u662f\u4e0d\u662f\u542c\u8d77\u6765\u6709\u70b9\u8dd1\u9898\u4e86\uff1f\u867d\u7136\u542c\u8d77\u6765\u8fd9\u548c\u6211\u4eec\u8981\u8c08\u7684SNIFF\u6ca1\u4ec0
\n\u4e48
\n\u5173\u7cfb\uff0c\u53ef\u662f\u8fd8\u662f\u8981\u8bf4\u4e00\u8bf4\u7684\uff0c\u4e07\u4e08\u9ad8\u697c\u5e73\u5730\u8d77\uff0c\u5982\u679c\u8fde\u5730\u57fa\u90fd\u6ca1\u6253\u597d\uff0c\u600e\u4e48\u76d6\u697c\uff1f\uff01\u5982
\n\u679c\u4f60
\n\u5bf9\u7f51\u7edc\u8fd8\u4e0d\u662f\u5341\u5206\u6e05\u695a\u7684\u8bdd\uff0c\u6700\u597d\u80fd\u9759\u4e0b\u5fc3\u6765\u597d\u597d\u770b\u770b\uff0c\u8981\u77e5\u9053\uff0c\u8fd9\u662f\u57fa\u7840\u7684\u57fa\u7840\uff0c\u5728
\n\u8fd9\u91cc
\n\u6211\u53ea\u662f\u7b80\u5355\u7684\u8bf4\u4e00\u4e0b\uff0c\u514d\u5f97\u5230\u65f6\u5019\u6709\u4eba\u8ff7\u7cca\uff0c\u8be6\u7ec6\u7684\u6700\u597d\u80fd\u591f\u81ea\u5df1\u53bb\u627e\u4e66\u770b\u770b\u3002<\/p>\n

\n\uff081\uff09TCP\/IP\u4f53\u7cfb\u7ed3\u6784<\/p>\n

\u5f00\u653e\u7cfb\u7edf\u4e92\u8fde\uff08OSI\uff09\u6a21\u578b\u5c06\u7f51\u7edc\u5212\u5206\u4e3a\u4e03\u5c42\u6a21\u578b\uff0c\u5206\u522b\u7528\u4ee5\u5728\u5404\u5c42\u4e0a\u5b9e\u73b0\u4e0d\u540c\u7684\u529f
\n\u80fd\uff0c
\n\u8fd9\u4e03\u5c42\u5206\u522b\u4e3a\uff1a\u5e94\u7528\u5c42\u3001\u8868\u793a\u5c42\u3001\u4f1a\u8bdd\u5c42\u3001\u4f20\u8f93\u5c42\u3001\u7f51\u7edc\u5c42\u3001\u6570\u636e\u94fe\u8def\u5c42\u53ca\u7269\u7406\u5c42\u3002\u800cT
\nCP\/IP
\n\u4f53\u7cfb\u4e5f\u540c\u6837\u9075\u5faa\u8fd9\u4e03\u5c42\u6807\u51c6\uff0c\u53ea\u4e0d\u8fc7\u5728\u67d0\u4e9bOSI\u529f\u80fd\u4e0a\u8fdb\u884c\u4e86\u538b\u7f29\uff0c\u5c06\u8868\u793a\u5c42\u53ca\u4f1a\u8bdd\u5c42\u5408
\n\u5e76\u5165
\n\u5e94\u7528\u5c42\u4e2d\uff0c\u6240\u4ee5\u5b9e\u9645\u4e0a\u6211\u4eec\u6253\u4ea4\u9053\u7684TCP\/IP\u4ec5\u4ec5\u67095\u5c42\u800c\u5df2\uff0c\u7f51\u7edc\u4e0a\u7684\u5206\u5c42\u7ed3\u6784\u51b3\u5b9a\u4e86\u5728
\n\u5404\u5c42
\n\u4e0a\u7684\u534f\u8bae\u5206\u5e03\u53ca\u529f\u80fd\u5b9e\u73b0\uff0c\u4ece\u800c\u51b3\u5b9a\u4e86\u5404\u5c42\u4e0a\u7f51\u7edc\u8bbe\u5907\u7684\u4f7f\u7528\u3002\u5b9e\u9645\u4e0a\u5f88\u591a\u6210\u529f\u7684\u7cfb\u7edf
\n\u90fd\u662f\u57fa
\n\u4e8eOSI\u6a21\u578b\u7684\uff0c\u5982\uff1a\u5982\u5e27\u4e2d\u7ee7\u3001ATM\u3001ISDN\u7b49\u3002<\/p>\n

TCP\/IP\u7684\u7f51\u7edc\u4f53\u7cfb\u7ed3\u6784\uff08\u90e8\u5206\uff09<\/p>\n

———————————–
\n| SMTP | DNS | HTTP | FTP | TELNET| \u5e94\u7528\u5c42<\/p>\n

———————————–
\n| \u3000 \u3000TCP \u3000 \u3000|\u3000 \u3000UDP \u3000 \u3000 \u3000|\u3000 \u4f20\u8f93\u5c42<\/p>\n

———————————–
\n| \u3000IP\u3000 | \u3000 ICMP \u3000\u3000| ARP RARP | \u7f51\u7edc\u5c42\u3000<\/p>\n

————————
\n| IEEE 802 \u4ee5\u592a\u7f51 SLIP\/PPP PDN etc| \u6570\u636e\u94fe\u8def\u5c42<\/p>\n

———————————–
\n|\u3000 \u3000\u3000\u7f51\u5361 \u7535\u7f06 \u53cc\u7ede\u7ebf etc \u3000\u3000 | \u7269\u7406\u5c42<\/p>\n

———————————–<\/p>\n

\n\u4ece\u4e0a\u9762\u7684\u56fe\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0c\u7b2c\u4e00\u5c42\u7269\u7406\u5c42\u548c\u7b2c\u4e8c\u5c42\u6570\u636e\u94fe\u8def\u5c42\u662fTCP\/IP\u7684\u57fa\u7840\uff0c
\n\u800c
\nTCP\/IP\u672c\u8eab\u5e76\u4e0d\u5341\u5206\u5173\u5fc3\u4f4e\u5c42\uff0c\u56e0\u4e3a\u5904\u5728\u6570\u636e\u94fe\u8def\u5c42\u7684\u7f51\u7edc\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u5c06\u4e0a\u5c42\u7684\u534f\u8bae
\n\u548c
\n\u5b9e\u9645\u7684\u7269\u7406\u63a5\u53e3\u9694\u79bb\u5f00\u6765\u3002\u7f51\u7edc\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u4f4d\u4e8e\u4ecb\u8d28\u8bbf\u95ee\u5b50\u5c42(MAC)\u3002\u3000\u3000\u3000 \u3000\u3000 \u3000<\/p>\n

\n\uff082\uff09\u7f51\u7edc\u4e0a\u7684\u8bbe\u5907\u3000 \u3000\u3000 \u3000 \u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000<\/p>\n

\u4e2d\u7ee7\u5668\uff1a\u4e2d\u7ee7\u5668\u7684\u4e3b\u8981\u529f\u80fd\u662f\u7ec8\u7ed3\u4e00\u4e2a\u7f51\u6bb5\u7684\u4fe1\u53f7\u5e76\u5728\u53e6\u4e00\u4e2a\u7f51\u6bb5\u518d\u751f\u8be5\u4fe1\u53f7\uff0c\u4e00\u53e5\u8bdd
\n\uff0c
\n\u5c31\u662f\u7b80\u5355\u7684\u653e\u5927\u800c\u5df2\uff0c\u5de5\u4f5c\u5728\u7269\u7406\u5c42\u4e0a\u3002\u3000\u3000\u3000 \u3000\u3000<\/p>\n

\u7f51 \u6865\uff1a\u7f51\u6865\u4f7f\u7528MAC\u7269\u7406\u5730\u5740\u5b9e\u73b0\u4e2d\u7ee7\u529f\u80fd\uff0c\u53ef\u4ee5\u7528\u6765\u5206\u9694\u7f51\u6bb5\u6216\u8fde\u63a5\u90e8\u5206\u5f02\u79cd\u7f51\u7edc\uff0c
\n\u5de5
\n\u4f5c\u5728\u6570\u636e\u94fe\u8def\u5c42\u3002<\/p>\n

\u8def\u7531\u5668\uff1a\u8def\u7531\u5668\u4f7f\u7528\u7f51\u7edc\u5c42\u5730\u5740(IP,X.121,E.164\u7b49)\uff0c\u4e3b\u8981\u8d1f\u8d23\u6570\u636e\u5305\u7684\u8def\u7531\u5bfb\u5f84\uff0c\u4e5f
\n\u80fd
\n\u5904\u7406\u7269\u7406\u5c42\u548c\u6570\u636e\u94fe\u8def\u5c42\u4e0a\u7684\u5de5\u4f5c\u3002<\/p>\n

\u7f51 \u5173\uff1a\u4e3b\u8981\u5de5\u4f5c\u5728\u7f51\u7edc\u7b2c\u56db\u5c42\u4ee5\u4e0a\uff0c\u4e3b\u8981\u5b9e\u73b0\u6536\u655b\u529f\u80fd\u53ca\u534f\u8bae\u8f6c\u6362\uff0c\u4e0d\u8fc7\u5f88\u591a\u65f6\u5019\u7f51\u5173
\n\u90fd
\n\u88ab\u7528\u6765\u63cf\u8ff0\u4efb\u4f55\u7f51\u7edc\u4e92\u8fde\u8bbe\u5907\u3002<\/p>\n

\uff083\uff09TCP\/IP\u4e0e\u4ee5\u592a\u7f51<\/p>\n

\u4ee5\u592a\u7f51\u548cTCP\/IP\u53ef\u4ee5\u8bf4\u662f\u76f8\u4e92\u76f8\u6210\u7684\uff0c\u53ef\u4ee5\u8bf4\u4e24\u8005\u7684\u5173\u7cfb\u51e0\u4e4e\u662f\u5bc6\u4e0d\u53ef\u5206\uff0c\u4ee5\u592a\u7f51
\n\u5728
\n\u4e00\u4e8c\u5c42\u63d0\u4f9b\u7269\u7406\u4e0a\u7684\u8fde\u7ebf\uff0c\u800cTCP\/IP\u5de5\u4f5c\u5728\u4e0a\u5c42\uff0c\u4f7f\u752832\u4f4d\u7684IP\u5730\u5740\uff0c\u4ee5\u592a\u7f51\u5219\u4f7f\u752848
\n\u4f4d
\n\u7684MAC\u5730\u5740\uff0c\u4e24\u8005\u95f4\u4f7f\u7528ARP\u548cRARP\u534f\u8bae\u8fdb\u884c\u76f8\u4e92\u8f6c\u6362\u3002\u4ece\u6211\u4eec\u4e0a\u9762TCP\/IP\u7684\u6a21\u578b\u56fe\u4e2d\u53ef
\n\u4ee5
\n\u6e05\u695a\u7684\u770b\u5230\u4e24\u8005\u7684\u5173\u7cfb\u3002<\/p>\n

\u8f7d\u6ce2\u76d1\u542c\/\u51b2\u7a81\u68c0\u6d4b(CSMA\/CD)\u6280\u672f\u88ab\u666e\u904d\u7684\u4f7f\u7528\u5728\u4ee5\u592a\u7f51\u4e2d\uff0c\u6240\u8c13\u8f7d\u6ce2\u76d1\u542c\u662f\u6307\u5728
\n\u4ee5
\n\u592a\u7f51\u4e2d\u7684\u6bcf\u4e2a\u7ad9\u70b9\u90fd\u5177\u6709\u540c\u7b49\u7684\u6743\u5229\uff0c\u5728\u4f20\u8f93\u81ea\u5df1\u7684\u6570\u636e\u65f6\uff0c\u9996\u5148\u76d1\u542c\u4fe1\u9053\u662f\u5426\u7a7a\u95f2\uff0c
\n\u5982
\n\u679c\u7a7a\u95f2\uff0c\u5c31\u4f20\u8f93\u81ea\u5df1\u7684\u6570\u636e\uff0c\u5982\u679c\u4fe1\u9053\u88ab\u5360\u7528\uff0c\u5c31\u7b49\u5f85\u4fe1\u9053\u7a7a\u95f2\u3002\u800c\u51b2\u7a81\u68c0\u6d4b\u5219\u662f\u4e3a\u4e86
\n\u9632
\n\u6b62\u53d1\u751f\u4e24\u4e2a\u7ad9\u70b9\u540c\u65f6\u76d1\u6d4b\u5230\u7f51\u7edc\u6ca1\u6709\u88ab\u4f7f\u7528\u65f6\u800c\u4ea7\u751f\u51b2\u7a81\u3002\u4ee5\u592a\u7f51\u91c7\u7528\u5e7f\u64ad\u673a\u5236\uff0c\u6240\u6709
\n\u4e0e
\n\u7f51\u7edc\u8fde\u63a5\u7684\u5de5\u4f5c\u7ad9\u90fd\u53ef\u4ee5\u770b\u5230\u7f51\u7edc\u4e0a\u4f20\u9012\u7684\u6570\u636e\u3002<\/p>\n

\u4e3a\u4e86\u52a0\u6df1\u4f60\u7684\u7406\u89e3\uff0c\u6211\u4eec\u6765\u770b\u770b\u4e0b\u9762\u7684\u56fe\uff0c\u4e00\u4e2a\u5178\u578b\u7684\u5728\u4ee5\u592a\u7f51\u4e2d\u5ba2\u6237\u4e0e\u670d\u52a1\u5668\u4f7f
\n\u7528
\nTCP\/IP\u534f\u8bae\u7684\u901a\u4fe1\u3002<\/p>\n

\n\u7528\u6237\u8fdb\u7a0b FTP\u5ba2\u6237 <————————-> FTP\u670d\u52a1\u5668 \u3000\u5e94\u7528\u5c42
\n| |
\n\u5185\u6838\u4e2d\u7684\u534f\u8bae\u6808 TCP <————————-> TCP \u3000\u4f20\u8f93\u5c42
\n| |
\n\u5185\u6838\u4e2d\u7684\u534f\u8bae\u6808 IP <————————-> IP \u3000\u7f51\u7edc\u5c42
\n| |
\n\u4ee5\u592a\u7f51\u9a71\u52a8\u7a0b\u5e8f <————————-> \u4ee5\u592a\u7f51\u9a71\u52a8\u7a0b\u5e8f \u3000\u6570\u636e\u94fe\u8def\u5c42<\/p>\n

\u2500\u2500\u2500\u2500\u2500\u2500——————————-\u3000
\n\u4ee5\u592a\u7f51<\/p>\n

??\u5506\u5506\u4e86\u8fd9\u4e48\u591a\uff0c\u6709\u4eba\u70e6\u4e86\u5427\uff1f\u76f8\u4fe1\u6211\uff0c\u8fd9\u662f\u57fa\u7840\u7684\u57fa\u7840\uff0c\u53ef\u4ee5\u8bf4\u662f\u8bf4\u5f97\u662f\u5f88\u7b80\u5355
\n\u62c9\uff0c
\n\u5982\u679c\u9700\u8981\uff0c\u62ff\u51fa\u4e2a\u51e0\u5341\u4e07\u5b57\u6765\u8bf4\u4e0a\u9762\u7684\u5185\u5bb9\uff0c\u6211\u60f3\u4e5f\u4e0d\u5acc\u591a\uff0c\u597d\u4e86\uff0c\u8ba9\u6211\u4eec\u8fdb\u5165\u4e0b\u4e00\u8282
\n\uff0c
\nsniff\u7684\u539f\u7406\u3002<\/p>\n

\n\u4e09 SNIFF\u7684\u539f\u7406<\/p>\n

\u8981\u77e5\u9053\u5728\u4ee5\u592a\u7f51\u4e2d\uff0c\u6240\u6709\u7684\u901a\u8baf\u90fd\u662f\u5e7f\u64ad\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u901a\u5e38\u5728\u540c\u4e00\u4e2a\u7f51\u6bb5\u7684\u6240\u6709\u7f51\u7edc
\n\u63a5
\n\u53e3\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5728\u7269\u7406\u5a92\u4f53\u4e0a\u4f20\u8f93\u7684\u6240\u6709\u6570\u636e\uff0c\u800c\u6bcf\u4e00\u4e2a\u7f51\u7edc\u63a5\u53e3\u90fd\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u786c\u4ef6\u5730
\n\u5740\uff0c
\n\u8fd9\u4e2a\u786c\u4ef6\u5730\u5740\u4e5f\u5c31\u662f\u7f51\u5361\u7684MAC\u5730\u5740\uff0c\u5927\u591a\u6570\u7cfb\u7edf\u4f7f\u752848\u6bd4\u7279\u7684\u5730\u5740\uff0c\u8fd9\u4e2a\u5730\u5740\u7528\u6765\u8868\u793a
\n\u7f51
\n\u7edc\u4e2d\u7684\u6bcf\u4e00\u4e2a\u8bbe\u5907\uff0c\u4e00\u822c\u6765\u8bf4\u6bcf\u4e00\u5757\u7f51\u5361\u4e0a\u7684MFC\u5730\u5740\u90fd\u662f\u4e0d\u540c\u7684\uff0c\u6bcf\u4e2a\u7f51\u5361\u5382\u5bb6\u5f97\u5230\u4e00
\n\u6bb5
\n\u5730\u5740\uff0c\u7136\u540e\u7528\u8fd9\u6bb5\u5730\u5740\u5206\u914d\u7ed9\u5176\u751f\u4ea7\u7684\u6bcf\u4e2a\u7f51\u5361\u4e00\u4e2a\u5730\u5740\u3002\u5728\u786c\u4ef6\u5730\u5740\u548cIP\u5730\u5740\u95f4\u4f7f\u7528A
\nRP
\n\u548cRARP\u534f\u8bae\u8fdb\u884c\u76f8\u4e92\u8f6c\u6362\u3002<\/p>\n

\u5728\u6b63\u5e38\u7684\u60c5\u51b5\u4e0b\uff0c\u4e00\u4e2a\u7f51\u7edc\u63a5\u53e3\u5e94\u8be5\u53ea\u54cd\u5e94\u8fd9\u6837\u7684\u4e24\u79cd\u6570\u636e\u5e27\uff1a<\/p>\n

1.\u4e0e\u81ea\u5df1\u786c\u4ef6\u5730\u5740\u76f8\u5339\u914d\u7684\u6570\u636e\u5e27\u3002\u3000 \u3000\u3000 \u3000\u3000\u3000\u3000 \u3000\u3000 \u3000\u3000\u3000\u3000 \u3000\u3000 \u3000\u3000
\n\u3000\u3000 \u3000\u3000 \u3000 \u3000\u3000 \u3000\u3000\u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 2.\u53d1\u5411\u6240\u6709\u673a\u5668\u7684\u5e7f\u64ad\u6570\u636e
\n\u5e27\u3002\u3000<\/p>\n

\u5728\u4e00\u4e2a\u5b9e\u9645\u7684\u7cfb\u7edf\u4e2d\uff0c\u6570\u636e\u7684\u6536\u53d1\u662f\u7531\u7f51\u5361\u6765\u5b8c\u6210\u7684\uff0c\u7f51\u5361\u63a5\u6536\u5230\u4f20\u8f93\u6765\u7684\u6570\u636e\uff0c\u7f51
\n\u5361
\n\u5185\u7684\u5355\u7247\u7a0b\u5e8f\u63a5\u6536\u6570\u636e\u5e27\u7684\u76ee\u7684MAC\u5730\u5740\uff0c\u6839\u636e\u8ba1\u7b97\u673a\u4e0a\u7684\u7f51\u5361\u9a71\u52a8\u7a0b\u5e8f\u8bbe\u7f6e\u7684\u63a5\u6536\u6a21\u5f0f
\n\u5224
\n\u65ad\u8be5\u4e0d\u8be5\u63a5\u6536\uff0c\u8ba4\u4e3a\u8be5\u63a5\u6536\u5c31\u63a5\u6536\u540e\u4ea7\u751f\u4e2d\u65ad\u4fe1\u53f7\u901a\u77e5CPU\uff0c\u8ba4\u4e3a\u4e0d\u8be5\u63a5\u6536\u5c31\u4e22\u6389\u4e0d\u7ba1\uff0c
\n\u6240
\n\u4ee5\u4e0d\u8be5\u63a5\u6536\u7684\u6570\u636e\u7f51\u5361\u5c31\u622a\u65ad\u4e86\uff0c\u8ba1\u7b97\u673a\u6839\u672c\u5c31\u4e0d\u77e5\u9053\u3002CPU\u5f97\u5230\u4e2d\u65ad\u4fe1\u53f7\u4ea7\u751f\u4e2d\u65ad\uff0c\u64cd
\n\u4f5c
\n\u7cfb\u7edf\u5c31\u6839\u636e\u7f51\u5361\u7684\u9a71\u52a8\u7a0b\u5e8f\u8bbe\u7f6e\u7684\u7f51\u5361\u4e2d\u65ad\u7a0b\u5e8f\u5730\u5740\u8c03\u7528\u9a71\u52a8\u7a0b\u5e8f\u63a5\u6536\u6570\u636e\uff0c\u9a71\u52a8\u7a0b\u5e8f
\n\u63a5\u6536
\n\u6570\u636e\u540e\u653e\u5165\u4fe1\u53f7\u5806\u6808\u8ba9\u64cd\u4f5c\u7cfb\u7edf\u5904\u7406\u3002\u800c\u5bf9\u4e8e\u7f51\u5361\u6765\u8bf4\u4e00\u822c\u6709\u56db\u79cd\u63a5\u6536\u6a21\u5f0f\uff1a<\/p>\n

\u5e7f\u64ad\u65b9\u5f0f\uff1a\u8be5\u6a21\u5f0f\u4e0b\u7684\u7f51\u5361\u80fd\u591f\u63a5\u6536\u7f51\u7edc\u4e2d\u7684\u5e7f\u64ad\u4fe1\u606f\u3002\u3000\u3000\u3000\u3000\u3000\u3000\u3000 \u3000\u3000 \u3000
\n\u7ec4\u64ad\u65b9\u5f0f\uff1a\u8bbe\u7f6e\u5728\u8be5\u6a21\u5f0f\u4e0b
\n\u7684\u7f51\u5361\u80fd\u591f\u63a5\u6536\u7ec4\u64ad\u6570\u636e\u3002 \u3000\u3000\u3000 \u3000\u3000\u3000 \u3000\u3000\u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000
\n\u3000\u3000 \u3000 \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u76f4\u63a5\u65b9\u5f0f\uff1a\u5728\u8fd9\u79cd\u6a21\u5f0f\u4e0b\uff0c\u53ea\u6709\u76ee\u7684\u7f51\u5361\u624d\u80fd\u63a5\u6536\u8be5\u6570\u636e\u3002
\n\u6df7\u6742\u6a21
\n\u5f0f\uff1a\u5728\u8fd9\u79cd\u6a21\u5f0f\u4e0b\u7684\u7f51\u5361\u80fd\u591f\u63a5\u6536\u4e00\u5207\u901a\u8fc7\u5b83\u7684\u6570\u636e\uff0c\u800c\u4e0d\u7ba1\u8be5\u6570\u636e\u662f\u5426\u662f\u4f20\u7ed9\u5b83\u7684\u3002<\/p>\n

\u597d\u4e86\uff0c\u73b0\u5728\u6211\u4eec\u603b\u7ed3\u4e00\u4e0b\uff0c\u9996\u5148\uff0c\u6211\u4eec\u77e5\u9053\u4e86\u5728\u4ee5\u592a\u7f51\u4e2d\u662f\u57fa\u4e8e\u5e7f\u64ad\u65b9\u5f0f\u4f20\u9001\u6570\u636e\u7684
\n\uff0c\u4e5f
\n\u5c31\u662f\u8bf4\uff0c\u6240\u6709\u7684\u7269\u7406\u4fe1\u53f7\u90fd\u8981\u7ecf\u8fc7\u6211\u7684\u673a\u5668\uff0c\u518d\u6b21\uff0c\u7f51\u5361\u53ef\u4ee5\u7f6e\u4e8e\u4e00\u79cd\u6a21\u5f0f\u53eb\u6df7\u6742\u6a21\u5f0f
\n\uff08promiscuous\uff09\uff0c\u5728\u8fd9\u79cd\u6a21\u5f0f\u4e0b\u5de5\u4f5c\u7684\u7f51\u5361\u80fd\u591f\u63a5\u6536\u5230\u4e00\u5207\u901a\u8fc7\u5b83\u7684\u6570\u636e\uff0c\u800c\u4e0d\u7ba1\u5b9e\u9645
\n\u4e0a\u6570
\n\u636e\u7684\u76ee\u7684\u5730\u5740\u662f\u4e0d\u662f\u4ed6\u3002\u8fd9\u5b9e\u9645\u4e0a\u5c31\u662f\u6211\u4eecSNIFF\u5de5\u4f5c\u7684\u57fa\u672c\u539f\u7406\uff1a\u8ba9\u7f51\u5361\u63a5\u6536\u4e00\u5207\u4ed6\u6240
\n\u80fd\u63a5
\n\u6536\u7684\u6570\u636e\u3002<\/p>\n

\uff08\u56fe\u4e00\uff09<\/p>\n

\n\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u5982\u56fe\u4e00\u6240\u793a\uff0c\u673a\u5668A\u3001B\u3001C\u4e0e\u96c6\u7ebf\u5668HUB\u76f8\u8fde\u63a5\uff0c\u96c6\u7ebf\u5668HUB
\n\u901a
\n\u8fc7\u8def\u7531\u5668Router\u8bbf\u95ee\u5916\u90e8\u7f51\u7edc\u3002\u8fd9\u662f\u4e00\u4e2a\u5f88\u7b80\u5355\u4e5f\u5f88\u5e38\u89c1\u7684\u60c5\u51b5\uff0c\u6bd4\u5982\u8bf4\u5728\u516c\u53f8\u5927\u697c\u91cc
\n\uff0c\u6211
\n\u6240\u5728\u7684\u7f51\u7edc\u90e8\u529e\u516c\u5ba4\u91cc\u7684\u51e0\u53f0\u673a\u5668\u901a\u8fc7\u96c6\u7ebf\u5668\u8fde\u63a5\uff0c\u800c\u7f51\u7edc\u90e8\u3001\u5f00\u53d1\u90e8\u3001\u5e02\u573a\u90e8\u4e5f\u662f\u540c
\n\u6837\u5982
\n\u6b64\uff0c\u51e0\u4e2a\u90e8\u95e8\u7684\u96c6\u7ebf\u5668\u901a\u8fc7\u8def\u7531\u5668\u8fde\u63a5\u3002\u8fd8\u662f\u56de\u5230\u6211\u4eec\u7684\u56fe\u4e00\u4e0a\u6765\uff0c\u503c\u5f97\u6ce8\u610f\u7684\u4e00\u70b9\u662f
\n\u673a\u5668
\nA\u3001B\u3001C\u4f7f\u7528\u4e00\u4e2a\u666e\u901a\u7684HUB\u8fde\u63a5\u7684\uff0c\u4e0d\u662f\u7528SWITCH\uff0c\u4e5f\u4e0d\u662f\u7528ROUTER\uff0c\u4f7f\u7528SWITCH\u548cROU
\nTER
\n\u7684\u60c5\u51b5\u8981\u6bd4\u8fd9\u590d\u6742\u5f97\u591a\u3002<\/p>\n

\u6211\u4eec\u5047\u8bbe\u4e00\u4e0b\u673a\u5668A\u4e0a\u7684\u7ba1\u7406\u5458\u4e3a\u4e86\u7ef4\u62a4\u673a\u5668C\uff0c\u4f7f\u7528\u4e86\u4e00\u4e2aFTP\u547d\u4ee4\u5411\u673a\u5668C\u8fdb\u884c\u8fdc\u7a0b
\n\u767b\u9646\uff0c
\n\u90a3\u4e48\u5728\u8fd9\u4e2a\u7528HUB\u8fde\u63a5\u7684\u7f51\u7edc\u91cc\u6570\u636e\u8d70\u5411\u8fc7\u7a0b\u662f\u8fd9\u6837\u7684\u3002\u9996\u5148\u673a\u5668A\u4e0a\u7684\u7ba1\u7406\u5458\u8f93\u5165\u7684\u767b
\n\u9646\u673a
\n\u5668C\u7684FTP\u53e3\u4ee4\u7ecf\u8fc7\u5e94\u7528\u5c42FTP\u534f\u8bae\u3001\u4f20\u8f93\u5c42TCP\u534f\u8bae\u3001\u7f51\u7edc\u5c42IP\u534f\u8bae\u3001\u6570\u636e\u94fe\u8def\u5c42\u4e0a\u7684\u4ee5
\n\u592a\u7f51
\n\u9a71\u52a8\u7a0b\u5e8f\u4e00\u5c42\u4e00\u5c42\u7684\u5305\u88f9\uff0c\u6700\u540e\u9001\u5230\u4e86\u7269\u7406\u5c42\uff0c\u6211\u4eec\u7684\u7f51\u7ebf\u4e0a\u3002\u63a5\u4e0b\u6765\u6570\u636e\u5e27\u9001\u5230\u4e86HUB
\n\u4e0a\uff0c
\n\u73b0\u5728\u7531HUB\u5411\u6bcf\u4e00\u4e2a\u63a5\u70b9\u5e7f\u64ad\u7531\u673a\u5668A\u53d1\u51fa\u7684\u6570\u636e\u5e27\uff0c\u673a\u5668B\u63a5\u6536\u5230\u7531HUB\u5e7f\u64ad\u53d1\u51fa\u7684\u6570\u636e
\n\u5e27\uff0c
\n\u5e76\u68c0\u67e5\u5728\u6570\u636e\u5e27\u4e2d\u7684\u5730\u5740\u662f\u5426\u548c\u81ea\u5df1\u7684\u5730\u5740\u76f8\u5339\u914d\uff0c\u53d1\u73b0\u4e0d\u662f\u53d1\u5411\u81ea\u5df1\u7684\u540e\u628a\u8fd9\u6570\u636e\u5e27
\n\u4e22\u5f03\uff0c
\n\u4e0d\u4e88\u7406\u776c\u3002\u800c\u673a\u5668C\u4e5f\u63a5\u6536\u5230\u4e86\u6570\u636e\u5e27\uff0c\u5e76\u5728\u6bd4\u8f83\u4e4b\u540e\u53d1\u73b0\u662f\u53d1\u73b0\u81ea\u5df1\u7684\uff0c\u63a5\u4e0b\u6765\u4ed6\u5c31\u5bf9
\n\u8fd9\u6570
\n\u636e\u5e27\u8fdb\u884c\u5206\u6790\u5904\u7406\u3002<\/p>\n

\u5728\u4e0a\u9762\u8fd9\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u4e2d\uff0c\u673a\u5668B\u4e0a\u7684\u7ba1\u7406\u5458\u5982\u679c\u5f88\u597d\u5947\uff0c\u4ed6\u5f88\u60f3\u77e5\u9053\u7a76\u7adf\u767b\u9646\u673a\u5668C
\n\u4e0aFTP
\n\u53e3\u4ee4\u662f\u4ec0\u4e48\uff1f\u90a3\u4e48\u4ed6\u8981\u505a\u7684\u5f88\u7b80\u5355\uff0c\u4ec5\u4ec5\u9700\u8981\u628a\u81ea\u5df1\u673a\u5668\u4e0a\u7684\u7f51\u5361\u7f6e\u4e8e\u6df7\u6742\u6a21\u5f0f\uff0c\u5e76\u5bf9
\n\u63a5\u6536\u5230
\n\u7684\u6570\u636e\u5e27\u8fdb\u884c\u5206\u6790\uff0c\u4ece\u800c\u627e\u5230\u5305\u542b\u5728\u6570\u636e\u5e27\u4e2d\u7684\u53e3\u4ee4\u4fe1\u606f\u3002<\/p>\n

\n\u56db \u505a\u4e00\u4e2a\u81ea\u5df1\u7684sniff<\/p>\n

\u5728\u4e0a\u4e00\u8282\u91cc\uff0c\u6211\u4eec\u5df2\u7ecf\u77e5\u9053\u4e86SNIFF\u7684\u57fa\u672c\u539f\u7406\u662f\u600e\u4e48\u4e00\u56de\u4e8b\uff0c\u8fd9\u4e00\u8282\u6211\u4eec\u6765\u4eb2\u81ea\u52a8\u624b
\n\u505a\u4e00\u4e2a
\n\u81ea\u5df1\u7684sniff\uff0c\u6bd5\u7adf\uff0c\u7528\u7a0b\u5e8f\u4ee3\u7801\u6765\u8bf4\u8bdd\u6bd4\u4ec0\u4e48\u90fd\u8981\u6765\u5f97\u771f\u5b9e\uff0c\u4e5f\u5bb9\u6613\u52a0\u6df1\u7406\u89e3\u3002<\/p>\n

\u56de\u5934\u60f3\u4e00\u60f3\u6211\u4eec\u4e0a\u9762\u8bf4\u7684\u539f\u7406\uff0c\u6211\u4eec\u8981\u505a\u7684\u4e8b\u60c5\u6709\u51e0\u4ef6\uff1a<\/p>\n

1. \u628a\u7f51\u5361\u7f6e\u4e8e\u6df7\u6742\u6a21\u5f0f\u3002\u3000 \u3000\u3000 \u3000\u3000\u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000 \u3000\u3000\u3000\u3000 \u3000\u3000 \u3000
\n2. \u6355\u83b7\u6570\u636e\u5305\u3002\u3000 \u3000\u3000 <\/p>\n

3. \u5206\u6790\u6570\u636e\u5305\u3002<\/p>\n

\u6ce8\uff1a\u4e0b\u9762\u7684\u6e90\u4ee3\u7801\u53d6\u81f3Chad Renfro\u7684<< Basic Packet-Sniffer Construction from
\nthe Ground Up>>
\n\u4e00\u6587\u4e2d
\n\/************************Tcp_sniff_2.c********************\/
\n1.\uff03i nclude \u3000
\n2.\uff03i nclude \u3000
\n3.\uff03i nclude
\n4.\uff03i nclude
\n5.\uff03i nclude
\n6.\uff03i nclude
\n7.\uff03i nclude \u3000
\n8.\uff03i nclude
\n9.\uff03i nclude “headers.h”<\/p>\n

#define INTERFACE “eth0”<\/p>\n

\/*Prototype area*\/<\/p>\n

10.int Open_Raw_Socket(void);\u3000
\n11.int Set_Promisc(char *interface, int sock);\u3000
\n12.int main() { \u3000
\n13.int sock, bytes_recieved, fromlen;\u3000\u3000
\n14.char buffer[65535];
\n15.struct sockaddr_in from;\u3000
\n16.struct ip *ip;
\n17.struct tcp *tcp; \u3000
\n18.sock = Open_Raw_Socket();
\n19. Set_Promisc(INTERFACE, sock);<\/p>\n

20. while(1)
\n22. {
\n23. fromlen = sizeof from;
\n24. bytes_recieved = recvfrom(sock, buffer, sizeof buffer, 0, (struct
\nsockaddr *)&from, &fromlen);
\n25. printf(“\\nBytes received ::: %5d\\n”,bytes_recieved);
\n26. printf(“Source address ::: %s\\n”,inet_ntoa(from.sin_addr));
\n27. ip = (struct ip *)buffer;
\n\/*See if this is a TCP packet*\/
\n28. if(ip->ip_protocol == 6) {
\n29. printf(“IP header length ::: %d\\n”,ip->ip_length);
\n30. printf(“Protocol ::: %d\\n”,ip->ip_protocol);
\n31. tcp = (struct tcp *)(buffer + (4*ip->ip_length));
\n32. printf(“Source port ::: %d\\n”,ntohs(tcp->tcp_source_port));
\n33. printf(“Dest port ::: %d\\n”,ntohs(tcp->tcp_dest_port));
\n34. }<\/p>\n

35. }
\n36.}
\n37.int Open_Raw_Socket() {\u3000\u3000\u3000\u3000
\n38. int sock;
\n39. if((sock = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)) < 0) {
\n\/*Then the socket was not created properly and must die*\/
\n40. perror(“The raw socket was not created”);
\n41. exit(0);
\n42. };\u3000\u3000
\n43. return(sock);\u3000\u3000
\n44. }<\/p>\n

45.int Set_Promisc(char *interface, int sock ) { \u3000
\n46. struct ifreq ifr; \u3000\u3000 \u3000\u3000
\n47. strncpy(ifr.ifr_name, interface,strnlen(interface)+1);
\n48. if((ioctl(sock, SIOCGIFFLAGS, &ifr) == -1)) {\u3000\u3000
\n\/*Could not retrieve flags for the interface*\/
\n49. perror(“Could not retrive flags for the interface”);
\n50. exit(0);
\n51. }\u3000
\n52. printf(“The interface is ::: %s\\n”, interface);\u3000\u3000
\n53. perror(“Retrieved flags from interface successfully”);
\n54. ifr.ifr_flags |= IFF_PROMISC; \u3000
\n55. if (ioctl (sock, SIOCSIFFLAGS, &ifr) == -1 ) { \u3000
\n\/*Could not set the flags on the interface *\/ \u3000
\n56. perror(“Could not set the PROMISC flag:”);
\n57. exit(0);\u3000\u3000 \u3000
\n58. }
\n59. printf(“Setting interface ::: %s ::: to promisc”, interface);
\n60. return(0);
\n61. }<\/p>\n

\/***********************EOF**********************************\/<\/p>\n

\u4e0a\u9762\u8fd9\u6bb5\u7a0b\u5e8f\u4e2d\u6709\u5f88\u8be6\u7ec6\u7684\u6ce8\u89e3\uff0c\u4e0d\u8fc7\u6211\u60f3\u8fd8\u662f\u6709\u5fc5\u8981\u8bf4\u4e00\u8bf4\uff0c\u9996\u5148
\n\u7b2c10\u884c–int Open_Raw_Socket(void);\u3000\u662f\u6211\u4eec\u7684\u81ea\u5b9a\u4e49\u51fd\u6570\uff0c\u5177\u4f53\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n

\n37.int Open_Raw_Socket() {\u3000\u3000\u3000\u3000
\n38. int sock;
\n39. if((sock = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)) < 0) {
\n\/*Then the socket was not created properly and must die*\/
\n40. perror(“The raw socket was not created”);
\n41. exit(0);
\n42. };\u3000\u3000
\n43. return(sock);\u3000\u3000
\n44. }<\/p>\n

\n\u7b2c39\u884c if((sock = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)) < 0) {<\/p>\n

\u8fd9\u91cc\u6211\u4eec\u8c03\u7528\u4e86socket\u51fd\u6570\uff0c\u4f7f\u521b\u5efa\u4e86\u4e86\u4e00\u4e2a\u539f\u59cb\u5957\u63a5\u53e3\uff0c\u4f7f\u4e4b\u6536\u5230TCP\/IP\u4fe1\u606f\u5305\u3002<\/p>\n

\u63a5\u4e0b\u6765\u7b2c11\u884c-int Set_Promisc(char *interface, int sock)\uff0c\u8fd9\u4e5f\u662f\u6211\u4eec\u7684\u81ea\u5b9a
\n\u4e49\u51fd\u6570\uff0c
\n\u76ee\u7684\u662f\u628a\u7f51\u5361\u7f6e\u4e8e\u6df7\u6742\u6a21\u5f0f\uff0c\u5177\u4f53\u5185\u5bb9\u5982\u4e0b\uff1a
\n45.int Set_Promisc(char *interface, int sock ) { \u3000
\n46. struct ifreq ifr; \u3000\u3000 \u3000\u3000
\n47. strncpy(ifr.ifr_name, interface,strnlen(interface)+1);
\n48. if((ioctl(sock, SIOCGIFFLAGS, &ifr) == -1)) {\u3000\u3000
\n\/*Could not retrieve flags for the interface*\/
\n49. perror(“Could not retrive flags for the interface”);
\n50. exit(0);
\n51. }\u3000
\n52. printf(“The interface is ::: %s\\n”, interface);\u3000\u3000
\n53. perror(“Retrieved flags from interface successfully”);
\n54. ifr.ifr_flags |= IFF_PROMISC; \u3000
\n55. if (ioctl (sock, SIOCSIFFLAGS, &ifr) == -1 ) { \u3000
\n\/*Could not set the flags on the interface *\/ \u3000
\n56. perror(“Could not set the PROMISC flag:”);
\n57. exit(0);\u3000\u3000 \u3000
\n58. }
\n59. printf(“Setting interface ::: %s ::: to promisc”, interface);
\n60. return(0);
\n61. }<\/p>\n

\u9996\u5148 struct ifreq ifr; \u5b9a\u4e00\u4e86\u4e00\u4e2aifrreg\u7684\u7ed3\u6784ifr\uff0c\u63a5\u4e0b\u6765
\nstrncpy(ifr.ifr_name, interface,strnlen(interface)+1);\uff0c\u5c31\u662f\u628a\u6211\u4eec\u7f51\u7edc\u8bbe\u5907\u7684
\n\u540d\u5b57\u586b
\n\u5145\u5230ifr\u7ed3\u6784\u4e2d\uff0c\u5728\u8fd9\u91cc #define INTERFACE “eth0” \uff0c\u8ba9\u6211\u4eec\u518d\u5f80\u4e0b\u770b,
\nioctl(sock, SIOCGIFFLAGS, &ifr),SIOCGIFFLAGS\u8bf7\u6c42\u8868\u793a\u9700\u8981\u83b7\u53d6\u63a5\u53e3\u6807\u5fd7\uff0c\u73b0\u5728\u5230
\n\u4e86
\n\u7b2c54\u884c\uff0c\u5728\u6211\u4eec\u6210\u529f\u7684\u83b7\u53d6\u63a5\u53e3\u6807\u5fd7\u540e\u628a\u4ed6\u8bbe\u7f6e\u6210\u6df7\u6742\u6a21\u5f0f\uff0c
\nifr.ifr_flags |= IFF_PROMISC;ioctl (sock, SIOCSIFFLAGS, &ifr)\u3002OK\uff0c\u73b0\u5728\u6211\u4eec\u6240
\n\u8bf4\u7684
\n\u7b2c\u4e00\u6b65\u5df2\u7ecf\u5b8c\u6210——–\u628a\u7f51\u5361\u7f6e\u4e8e\u6df7\u6742\u6a21\u5f0f\u3002<\/p>\n

\u73b0\u5728\u8fdb\u5165\u7b2c\u4e8c\u6b65\uff0c\u6355\u83b7\u6570\u636e\u5305\u3002\u4ece\u7b2c20\u884c\u5f00\u59cb\uff0c\u6211\u4eec\u8fdb\u5165\u4e86\u4e00\u4e2a\u6b7b\u5faa\u73af\uff0cwhile(1)
\n\uff0c\u5728
\n\u7b2c24\u884c\uff0crecvfrom(sock, buffer, sizeof buffer, 0, (struct sockaddr *)&from,
\n&fromlen)\uff0c
\n\u8fd9\u4e2a\u51fd\u6570\u8981\u505a\u7684\u5c31\u662f\u63a5\u6536\u6570\u636e\uff0c\u51b0\u628a\u63a5\u6536\u5230\u7684\u6570\u636e\u653e\u5165buffer\u4e2d\u3002\u5c31\u662f\u8fd9\u4e48\u7b80\u5355\uff0c\u5df2\u7ecf
\n\u5b8c\u6210\u4e86\u6211
\n\u4eec\u8981\u6355\u83b7\u6570\u636e\u5305\u7684\u4efb\u52a1\u3002<\/p>\n

\u5230\u4e86\u7b2c\u4e09\u6b65\uff0c\u5206\u6790\u6570\u636e\u5305\u300227\u884c\uff0cip = (struct ip *)buffer\uff0c\u4f7f\u6211\u4eec\u5728\u5934\u6587\u4ef6\u4e2d
\n\u7684IP\u7ed3
\n\u6784\u5bf9\u5e94\u4e8e\u6240\u63a5\u6536\u5230\u7684\u6570\u636e\uff0c\u63a5\u4e0b\u6765\u5224\u65ad\u5728\u7f51\u7edc\u5c42\u4e2d\u662f\u5426\u4f7f\u7528\u7684\u662fTCP\u534f\u8bae\uff0c
\nif(ip->ip_protocol == 6) \uff0c\u5982\u679c\u7b54\u6848\u662f\uff0ctcp\u4fe1\u606f\u5305\u4ece\u6574\u4e2aIP\/TCP\u5305 buffer +
\n(4*ip->ip_length)
\n\u5730\u5740\u5904\u5f00\u59cb\uff0c\u6240\u4ee531\u884c tcp = (struct tcp *)(buffer + (4*ip->ip_length))\uff0c\u7136\u540e\u5bf9
\n\u5e94
\n\u7ed3\u6784\u628a\u4f60\u6240\u9700\u8981\u7684\u4fe1\u606f\u8f93\u51fa\u3002
\n\/*************************headers.h**************************\/
\n\/*structure of an ip header*\/\u3000
\nstruct ip { \u3000\u3000
\nunsigned int ip_length:4; \/*little-endian*\/\u3000
\nunsigned int ip_version:4;
\nunsigned char ip_tos;\u3000
\nunsigned short ip_total_length; \u3000
\nunsigned short ip_id; \u3000
\nunsigned short ip_flags;
\nunsigned char ip_ttl;
\nunsigned char ip_protocol;
\nunsigned short ip_cksum;
\nunsigned int ip_source; unsigned int ip_dest; \u3000
\n};<\/p>\n

\/* Structure of a TCP header *\/
\nstruct tcp {
\nunsigned short tcp_source_port;
\nunsigned short tcp_dest_port;
\nunsigned int tcp_seqno; \u3000
\nunsigned int tcp_ackno;
\nunsigned int tcp_res1:4, \/*little-endian*\/
\ntcp_hlen:4,
\ntcp_fin:1,
\ntcp_syn:1,
\ntcp_rst:1,
\ntcp_psh:1,
\ntcp_ack:1,
\ntcp_urg:1,
\ntcp_res2:2;
\nunsigned short tcp_winsize;
\nunsigned short tcp_cksum;
\nunsigned short tcp_urgent;
\n};
\n\/*********************EOF***********************************\/<\/p>\n

\n\u4ece\u4e0a\u9762\u7684\u5206\u6790\u6211\u4eec\u53ef\u4ee5\u6e05\u695a\u7684\u8ba4\u8bc6\u5230\uff0c\u8ba4\u8bc6\u4e00\u4e2aSNIFF\u9700\u8981\u5bf9TCP\/IP\u534f\u8bae\u6709\u7740\u8be6\u7ec6\u7684\u4e86
\n\u89e3\uff0c
\n\u5426\u5219\u4f60\u6839\u672c\u65e0\u6cd5\u627e\u5230\u4f60\u9700\u8981\u7684\u4fe1\u606f\u3002\u6709\u4e86\u4e0a\u9762\u7684\u57fa\u7840\uff0c\u4f60\u53ef\u4ee5\u81ea\u5df1\u6765\u505a\u4e00\u4e2a\u4f60\u9700\u8981\u7684SNI
\nFF\u4e86\u3002<\/p>\n

\n\u4e94 \u5e38\u7528\u7684SNIFF<\/p>\n

\u5f88\u5c11\u6709\u539f\u56e0\u4f1a\u8ba9\u4f60\u81ea\u5df1\u4eb2\u81ea\u52a8\u624b\u6765\u505a\u4e00\u4e2a\u81ea\u5df1\u7684SNIFF\uff0c\u9664\u975e\u4f60\u662f\u60f3\u4e86\u89e3\u4ed6\u7684\u539f\u7406\uff0c\u6216
\n\u8005\u662f
\n\u5176\u4ed6\u4e00\u4e9b\u7279\u522b\u7684\u539f\u56e0\uff0c\u6bd4\u5982\u4f60\u8981\u5728\u67d0\u4e2a\u7279\u6b8a\u7684\u73af\u5883\u62e6\u622a\u4e00\u4e9b\u7279\u6b8a\u7684\u6570\u636e\u5305\u3002\u4e0b\u9762\u6211\u4eec\u5c31
\n\u6765\u770b
\n\u770b\u4e00\u4e9b\u5728\u7f51\u7edc\u4e0a\u7ecf\u5e38\u4f7f\u7528\u7684SNIFF\u3002<\/p>\n

\uff081\uff09windows\u73af\u5883\u4e0b<\/p>\n

windows\u73af\u5883\u4e0b\u5f53\u7136\u662f\u5927\u540d\u9f0e\u9f0e\u7684netxray\u4ee5\u53casniffer pro\u4e86\uff0c\u5b9e\u9645\u4e0a\u5f88\u591a\u4eba\u90fd\u662f\u7528
\n\u4ed6\u5728
\nwindows\u73af\u5883\u4e0b\u6293\u5305\u6765\u5206\u6790\uff0c\u4e0d\u8fc7\u6211\u60f3\u5f88\u5c11\u6709\u4eba\u7b28\u5230\u53bb\u5728\u522b\u4eba\u7684\u673a\u5668\u4e0a\u5b89\u88c5\u4e00\u4e2a\u56fe\u5f62\u754c\u9762
\n\u7684SNIFF\uff0c
\n\u9664\u975e\u4ed6\u548c\u7ba1\u7406\u5458\u5f88\u719f\u6089…….. netxray\u7684\u4f7f\u7528\u5c31\u4e0d\u591a\u8bf4\u4e86\uff0c\u53cd\u6b63windows\u4e0b\u7684\u4e1c\u897f\u5c31\u662f<\/p>\n

click\uff0cclick\uff0cclick\uff0c\u975e\u5e38\u7684\u65b9\u4fbf\u7528\u6237\u3002<\/p>\n

\uff082\uff09UNUX\u73af\u5883\u4e0b<\/p>\n

UNUX\u73af\u5883\u4e0b\u7684sniff\u53ef\u4ee5\u8bf4\u662f\u767e\u82b1\u9f50\u653e\uff0c\u4e00\u6293\u5c31\u662f\u4e00\u5927\u628a,\u5982sniffit\uff0csnoop,tcpdump
\n,dsniff
\n\u7b49\u90fd\u662f\u6bd4\u8f83\u5e38\u89c1\u7684\uff0c\u4ed6\u4eec\u90fd\u6709\u4e00\u4e2a\u597d\u5904\u5c31\u662f\u53d1\u5e03\u6e90\u4ee3\u7801\uff0c\u53ef\u4ee5\u8ba9\u4f60\u7814\u7a76\uff0c\u5f53\u7136\u4e5f\u90fd\u662f\u514d
\n\u8d39\u7684\uff1a\uff09<\/p>\n

1. sniffit<\/p>\n

sniffit\u53ef\u4ee5\u8fd0\u884c\u5728Solaris\u3001SGI\u548cLinux\u7b49\u5e73\u53f0\u4e0a\uff0c\u7531Lawrence Berkeley
\nLaboratory \u5b9e\u9a8c
\n\u5ba4\u5f00\u53d1\u7684\u4e00\u4e2a\u514d\u8d39\u7684\u7f51\u7edc\u76d1\u542c\u8f6f\u4ef6\u3002\u6700\u8fd1Sniffit 0.3.7\u4e5f\u63a8\u51fa\u4e86NT\u7248\u672c\uff0c\u5e76\u4e5f\u652f\u6301WIND
\nOWS2000.<\/p>\n

\u4f7f\u7528\u65b9\u6cd5:
\n-v \u663e\u793a\u7248\u672c\u4fe1\u606f
\n-a \u4ee5ASCII\u5f62\u5f0f\u5c06\u76d1\u542c\u7684\u7ed3\u679c\u8f93\u51fa\u3002
\n-A \u5728\u8fdb\u884c\u8bb0\u5f55\u65f6\uff0c\u6240\u6709\u4e0d\u53ef\u6253\u5370\u7684\u5b57\u7b26\u90fd\u7528\u4ee3\u66ff
\n-b \u7b49\u540c\u4e8e\u540c\u65f6\u4f7f\u7528\u53c2\u6570-t & -s\u3002\u3000\u3000 \u3000
\n-d \u5c06\u76d1\u542c\u6240\u5f97\u5185\u5bb9\u4ee5\u5341\u516d\u8fdb\u5236\u65b9\u5f0f\u663e\u793a\u5728\u5f53\u524d\u7ec8\u7aef\u3000
\n-p \u8bb0\u5f55\u8fde\u63a5\u5230\u7684\u5305\uff0c0\u4e3a\u6240\u6709\u7aef\u53e3\u3002\u7f3a\u7701\u4e3a0\u3002 \u3000\u3000
\n-P protocol \u9009\u62e9\u8981\u68c0\u67e5\u7684\u534f\u8bae\uff0c\u7f3a\u7701\u4e3aTCP\u3002\u53ef\u80fd\u7684\u9009\u62e9\u6709IP\u3001TCP\u3001ICMP\u3001UDP\u548c\u4ed6\u4eec
\n\u7684\u7ec4\u5408\u3002
\n-s \u6307\u5b9asniffer \u68c0\u67e5\u4ece \u53d1\u9001\u7684\u6570\u636e\u5305\u3002 -t \u6307\u5b9asniffer \u68c0\u67e5\u53d1\u9001\u5230\u7684\u6570\u636e\u5305\u3002
\n-i \u8fdb\u5165\u4ea4\u4e92\u6a21\u5f0f \u3000\u3000
\n-l \u8bbe\u5b9a\u6570\u636e\u5305\u5927\u5c0f\uff0cdefault\u662f300\u5b57\u8282 \u3000\u3000
\n\u6ce8\uff1a\u53c2\u6570\u53ef\u4ee5\u7528@\u6765\u8868\u793a\u4e00\u4e2aIP\u8303\u56f4\uff0c\u6bd4\u5982 -t 192.168.@ -t\u548c-s \u53ea\u9002\u7528\u4e8eTCP\/UDP\u6570\u636e
\n\u5305\uff0c\u5bf9
\n\u4e8eICMP\u548cIP\u4e5f\u8fdb\u884c\u89e3\u91ca\u3002\u4f46\u5982\u679c\u53ea\u9009\u62e9\u4e86-p\u53c2\u6570\uff0c\u5219\u53ea\u7528\u4e8eTCP\u548cUDP\u5305\u3002<\/p>\n

\u4e3e\u4f8b\u8bf4\u660e:<\/p>\n

#sniffit -a -p 21 -t xxx.xxx.xxx.xxx<\/p>\n

\u76d1\u542c\u6d41\u5411\u673a\u5668xxx.xxx.xxx.xxx\u768421\u7aef\u53e3(FTP)\u7684\u4fe1\u606f,\u5e76\u4ee5ASCII\u663e\u793a<\/p>\n

#sniffit -d -p 23 -b xxx.xxx.xxx.xxx<\/p>\n

\u76d1\u542c\u6240\u6709\u6d41\u51fa\u6216\u6d41\u5165\u673a\u5668xxx.xxx.xxx.xxx\u768423\u7aef\u53e3(telnet)\u7684\u4fe1\u606f\uff0c\u5e76\u4ee516\u8fdb\u5236\u663e\u793a<\/p>\n

\u4f60\u53ef\u4ee5\u5728\u8fd9\u91cc\u627e\u5230sniffit http:\/\/reptile.rug.ac.be\/~coder\/sniffit\/sniffit.html<\/p>\n

2. snoop<\/p>\n

snoop\u9ed8\u8ba4\u60c5\u51b5\u5b89\u88c5\u5728Solaris\u4e0b\uff0c\u662f\u4e00\u4e2a\u7528\u4e8e\u663e\u793a\u7f51\u7edc\u4ea4\u901a\u7684\u7a0b\u5e8f\uff0c\u4e0d\u8fc7SNIFF\u662f\u628a
\n\u53cc\u5203\u5251\uff0c
\n\u65e2\u7136\u7ba1\u7406\u5458\u80fd\u7528\u4ed6\u6765\u76d1\u89c6\u81ea\u5df1\u7684\u7f51\u7edc\uff0c\u5f53\u7136\u4e00\u4e2a\u5fc3\u6000\u6076\u610f\u7684\u5165\u4fb5\u8005\u4e5f\u53ef\u4ee5\u7528\u4ed6\u6765SNIFF\u81ea
\n\u5df1\u611f\u5174
\n\u8da3\u7684\u5185\u5bb9\u3002\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c SNOOP\u88ab\u53d1\u73b0\u5b58\u5728\u4e00\u4e2a\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u5f53\u4ee5\u5bfc\u81f4\u5165\u4fb5\u8005\u4ee5
\n\u8fd0\u884c
\nsnoop(\u901a\u5e38\u4e3aroot)\u7684\u8eab\u4efd\u8fdc\u7a0b\u8fdb\u5165\u7cfb\u7edf\u3002\u8fd9\u662f\u9898\u5916\u8bdd\uff0c\u6682\u4e14\u5c31\u6b64\u6253\u4f4f\u3002<\/p>\n

\u4f7f\u7528\u65b9\u6cd5\uff1a
\n[ -a ] # Listen to packets on audio
\n[ -d device ] # settable to le?, ie?, bf?, tr?
\n[ -s snaplen ] # Truncate packets
\n[ -c count ] # Quit after count packets
\n[ -P ] # Turn OFF promiscuous mode
\n[ -D ] # Report dropped packets
\n[ -S ] # Report packet size
\n[ -i file ] # Read previously captured packets
\n[ -o file ] # Capture packets in file
\n[ -n file ] # Load addr-to-name table from file
\n[ -N ] # Create addr-to-name table
\n[ -t r|a|d ] # Time: Relative, Absolute or Delta
\n[ -v ] # Verbose packet display
\n[ -V ] # Show all summary lines
\n[ -p first[,last] ] # Select packet(s) to display
\n[ -x offset[,length] ] # Hex dump from offset for length
\n[ -C ] # Print packet filter code<\/p>\n

\n\u4f8b\u5982\uff1a<\/p>\n

#snoop -o saved A B<\/p>\n

\u76d1\u542c\u673a\u5668A\u4e0eB\u7684\u8c08\u8bdd\uff0c\u5e76\u628a\u5185\u5bb9\u5b58\u50a8\u4e8e\u6587\u4ef6saved\u4e2d<\/p>\n

\n3. tcpdump<\/p>\n

tcpdmp\u4e5f\u7b97\u662f\u4e00\u4e2a\u5f88\u6709\u540d\u6c14\u7684\u7f51\u7edc\u76d1\u542c\u8f6f\u4ef6\uff0cFREEBSD\u8fd8\u628a\u4ed6\u9644\u5e26\u5728\u4e86\u7cfb\u7edf\u4e0a\uff0c\u662f\u4e00
\n\u4e2a\u88ab
\n\u5f88\u591aUNIX\u9ad8\u624b\u8ba4\u4e3a\u662f\u4e00\u4e2a\u4e13\u4e1a\u7684\u7f51\u7edc\u7ba1\u7406\u5de5\u5177\u3002<\/p>\n

\u4f7f\u7528\u65b9\u6cd5:
\ntcpdump\u91c7\u7528\u547d\u4ee4\u884c\u65b9\u5f0f\uff0c\u5b83\u7684\u547d\u4ee4\u683c\u5f0f\u4e3a\uff1a
\ntcpdump [ -adeflnNOpqStvx ][ -c \u6570\u91cf ][ -F \u6587\u4ef6\u540d ][ -i \u7f51\u7edc\u63a5\u53e3 ][ -r \u6587\u4ef6\u540d
\n]
\n[ -s snaplen ][ -T \u7c7b\u578b ][ -w \u6587\u4ef6\u540d ][\u8868\u8fbe\u5f0f ]
\n1. tcpdump\u7684\u9009\u9879\u4ecb\u7ecd
\n-a \u3000\u3000\u3000\u5c06\u7f51\u7edc\u5730\u5740\u548c\u5e7f\u64ad\u5730\u5740\u8f6c\u53d8\u6210\u540d\u5b57\uff1b
\n-d \u3000\u3000\u3000\u5c06\u5339\u914d\u4fe1\u606f\u5305\u7684\u4ee3\u7801\u4ee5\u4eba\u4eec\u80fd\u591f\u7406\u89e3\u7684\u6c47\u7f16\u683c\u5f0f\u7ed9\u51fa\uff1b
\n-dd \u3000\u3000 \u5c06\u5339\u914d\u4fe1\u606f\u5305\u7684\u4ee3\u7801\u4ee5c\u8bed\u8a00\u7a0b\u5e8f\u6bb5\u7684\u683c\u5f0f\u7ed9\u51fa\uff1b
\n-ddd \u3000\u3000\u5c06\u5339\u914d\u4fe1\u606f\u5305\u7684\u4ee3\u7801\u4ee5\u5341\u8fdb\u5236\u7684\u5f62\u5f0f\u7ed9\u51fa\uff1b
\n-e \u3000\u3000\u3000\u5728\u8f93\u51fa\u884c\u6253\u5370\u51fa\u6570\u636e\u94fe\u8def\u5c42\u7684\u5934\u90e8\u4fe1\u606f\uff1b
\n-f \u3000\u3000\u3000\u5c06\u5916\u90e8\u7684Internet\u5730\u5740\u4ee5\u6570\u5b57\u7684\u5f62\u5f0f\u6253\u5370\u51fa\u6765\uff1b
\n-l \u3000\u3000\u3000\u4f7f\u6807\u51c6\u8f93\u51fa\u53d8\u4e3a\u7f13\u51b2\u884c\u5f62\u5f0f\uff1b
\n-n \u3000\u3000\u3000\u4e0d\u628a\u7f51\u7edc\u5730\u5740\u8f6c\u6362\u6210\u540d\u5b57\uff1b
\n-t \u3000\u3000\u3000\u5728\u8f93\u51fa\u7684\u6bcf\u4e00\u884c\u4e0d\u6253\u5370\u65f6\u95f4\u6233\uff1b
\n-v \u3000\u3000\u3000\u8f93\u51fa\u4e00\u4e2a\u7a0d\u5fae\u8be6\u7ec6\u7684\u4fe1\u606f\uff0c\u4f8b\u5982\u5728ip\u5305\u4e2d\u53ef\u4ee5\u5305\u62ecttl\u548c\u670d\u52a1\u7c7b\u578b\u7684\u4fe1\u606f\uff1b
\n-vv \u3000\u3000\u3000\u8f93\u51fa\u8be6\u7ec6\u7684\u62a5\u6587\u4fe1\u606f\uff1b
\n-c \u3000\u3000\u3000\u5728\u6536\u5230\u6307\u5b9a\u7684\u5305\u7684\u6570\u76ee\u540e\uff0ctcpdump\u5c31\u4f1a\u505c\u6b62\uff1b
\n-F \u3000\u3000\u3000\u4ece\u6307\u5b9a\u7684\u6587\u4ef6\u4e2d\u8bfb\u53d6\u8868\u8fbe\u5f0f,\u5ffd\u7565\u5176\u5b83\u7684\u8868\u8fbe\u5f0f\uff1b
\n-i \u3000\u3000\u3000\u6307\u5b9a\u76d1\u542c\u7684\u7f51\u7edc\u63a5\u53e3\uff1b
\n-r \u3000\u3000\u3000\u4ece\u6307\u5b9a\u7684\u6587\u4ef6\u4e2d\u8bfb\u53d6\u5305(\u8fd9\u4e9b\u5305\u4e00\u822c\u901a\u8fc7-w\u9009\u9879\u4ea7\u751f)\uff1b
\n-w \u3000\u3000\u3000\u76f4\u63a5\u5c06\u5305\u5199\u5165\u6587\u4ef6\u4e2d\uff0c\u5e76\u4e0d\u5206\u6790\u548c\u6253\u5370\u51fa\u6765\uff1b
\n-T \u3000\u3000\u3000\u5c06\u76d1\u542c\u5230\u7684\u5305\u76f4\u63a5\u89e3\u91ca\u4e3a\u6307\u5b9a\u7684\u7c7b\u578b\u7684\u62a5\u6587\uff0c\u5e38\u89c1\u7684\u7c7b\u578b\u6709rpc\u548csnmp<\/p>\n

2. tcpdump\u7684\u8868\u8fbe\u5f0f\u4ecb\u7ecd<\/p>\n

\u8868\u8fbe\u5f0f\u662f\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\uff0ctcpdump\u5229\u7528\u5b83\u4f5c\u4e3a\u8fc7\u6ee4\u62a5\u6587\u7684\u6761\u4ef6\uff0c\u5982\u679c\u4e00\u4e2a\u62a5\u6587\u6ee1\u8db3\u8868
\n\u8fbe\u5f0f
\n\u7684\u6761\u4ef6\uff0c\u5219\u8fd9\u4e2a\u62a5\u6587\u5c06\u4f1a\u88ab\u6355\u83b7\u3002\u5982\u679c\u6ca1\u6709\u7ed9\u51fa\u4efb\u4f55\u6761\u4ef6\uff0c\u5219\u7f51\u7edc\u4e0a\u6240\u6709\u7684\u4fe1\u606f\u5305\u5c06\u4f1a
\n\u88ab\u622a\u83b7\u3002<\/p>\n

\u5728\u8868\u8fbe\u5f0f\u4e2d\u4e00\u822c\u5982\u4e0b\u51e0\u79cd\u7c7b\u578b\u7684\u5173\u952e\u5b57\uff0c\u4e00\u79cd\u662f\u5173\u4e8e\u7c7b\u578b\u7684\u5173\u952e\u5b57\uff0c\u4e3b\u8981\u5305\u62echost\uff0cn
\net\uff0c
\nport, \u4f8b\u5982 host 210.27.48.2\uff0c\u6307\u660e 210.27.48.2\u662f\u4e00\u53f0\u4e3b\u673a\uff0cnet 202.0.0.0 \u6307\u660e
\n202.0.0.0
\n\u662f\u4e00\u4e2a\u7f51\u7edc\u5730\u5740\uff0cport 23 \u6307\u660e\u7aef\u53e3\u53f7\u662f23\u3002\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u7c7b\u578b\uff0c\u7f3a\u7701\u7684\u7c7b\u578b\u662fhost. <\/p>\n

\n\u7b2c\u4e8c\u79cd\u662f\u786e\u5b9a\u4f20\u8f93\u65b9\u5411\u7684\u5173\u952e\u5b57\uff0c\u4e3b\u8981\u5305\u62ecsrc , dst ,dst or src, dst and src
\n,\u8fd9\u4e9b\u5173
\n\u952e\u5b57\u6307\u660e\u4e86 \u4f20\u8f93\u7684\u65b9\u5411\u3002\u4e3e\u4f8b\u8bf4\u660e\uff0csrc 210.27.48.2 ,\u6307\u660eip\u5305\u4e2d\u6e90\u5730\u5740\u662f210.27.48
\n.2 ,
\ndst net 202.0.0.0 \u6307\u660e\u76ee\u7684\u7f51\u7edc\u5730\u5740\u662f202.0.0.0 \u3002\u5982\u679c\u6ca1\u6709\u6307\u660e\u65b9\u5411\u5173\u952e\u5b57\uff0c\u5219\u7f3a
\n\u7701\u662f
\nsrc or dst\u5173\u952e\u5b57\u3002 \u3000\u3000\u3000<\/p>\n

\u7b2c\u4e09\u79cd\u662f\u534f\u8bae\u7684\u5173\u952e\u5b57\uff0c\u4e3b\u8981\u5305\u62ecfddi,ip ,arp,rarp,tcp,udp\u7b49\u7c7b\u578b\u3002Fddi\u6307\u660e\u662f
\n\u5728
\nFDDI(\u5206\u5e03\u5f0f\u5149\u7ea4\u6570\u636e\u63a5\u53e3\u7f51\u7edc)\u4e0a\u7684\u7279\u5b9a\u7684\u7f51\u7edc\u534f\u8bae\uff0c\u5b9e\u9645\u4e0a\u5b83\u662f”ether”\u7684\u522b\u540d\uff0cfddi
\n\u548cether
\n\u5177\u6709\u7c7b\u4f3c\u7684\u6e90\u5730\u5740\u548c\u76ee\u7684\u5730\u5740\uff0c\u6240\u4ee5\u53ef\u4ee5\u5c06fddi\u534f\u8bae\u5305\u5f53\u4f5cether\u7684\u5305\u8fdb\u884c\u5904\u7406\u548c\u5206\u6790\u3002
\n\u5176\u4ed6\u7684
\n\u51e0\u4e2a\u5173\u952e\u5b57\u5c31\u662f\u6307\u660e\u4e86\u76d1\u542c\u7684\u5305\u7684\u534f\u8bae\u5185\u5bb9\u3002\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u4efb\u4f55\u534f\u8bae\uff0c\u5219tcpdump\u5c06\u4f1a\u76d1
\n\u542c\u6240\u6709
\n\u534f\u8bae\u7684\u4fe1\u606f\u5305\u3002 \u3000\u3000<\/p>\n

\u9664\u4e86\u8fd9\u4e09\u79cd\u7c7b\u578b\u7684\u5173\u952e\u5b57\u4e4b\u5916\uff0c\u5176\u4ed6\u91cd\u8981\u7684\u5173\u952e\u5b57\u5982\u4e0b\uff1a
\ngateway, broadcast,less,greater,\u8fd8\u6709\u4e09\u79cd \u903b\u8f91\u8fd0\u7b97\uff0c\u53d6\u975e\u8fd0\u7b97\u662f ‘not ‘ ‘! ‘, \u4e0e
\n\u8fd0\u7b97
\n\u662f’and’,’&&’;\u6216\u8fd0\u7b97 \u662f’or’ ,’||’\u3002<\/p>\n

\n\u4e3e\u4f8b\u4f7f\u7528:<\/p>\n

#tcpdump host AAA.BBB.CCC.DDD<\/p>\n

\u5c06\u76d1\u542cIP\u5730\u5740\u4e3aAAA.BBB.CCC.DDD\u7684\u673a\u5668\u7684\u901a\u8bdd<\/p>\n

#tcpdump tcp port 23 host AAA.BBB.CCC.DDD<\/p>\n

\u5c06\u76d1\u542cIP\u5730\u5740\u4e3aAAA.BBB.CCC.DDD\u7684\u673a\u5668\u768423\u7aef\u53e3\u7684\u901a\u8bdd<\/p>\n

\n4. dsniff<\/p>\n

\u4e4b\u6240\u4ee5\u8981\u8c08\u8c08dsniff\uff0c\u662f\u56e0\u4e3a\u4ed6\u4e0d\u4ec5\u4ec5\u662f\u4e00\u4e2asniff\uff0c\u5728\u4ed6\u7684\u6574\u4e2a\u5957\u4ef6\u5305\u4e2d\uff0c\u5305\u542b\u4e86\u5f88
\n\u591a
\n\u5176\u5b83\u6709\u7528\u7684\u5de5\u5177\uff0c\u5982arpspoof\uff0cdnsspoof\uff0cmacof\uff0ctcpkill\u7b49\u7b49\uff0cSNIFF\u7684\u624b\u6bb5\u66f4\u52a0\u7684\u591a
\n\u6837\u548c
\n\u590d\u6742\u5316\u3002dsniff\u662f\u7531DugSong\u5f00\u53d1\u7684\u4f60\u53ef\u4ee5\u5728\u4ed6\u7684\u4e3b\u9875\u4e0a\u627e\u5230\u8fd9\u4e2a\u5de5\u5177\u3002 \u76ee\u524ddsniff\u652f
\n\u6301
\nOpenBSD (i386), Redhat Linux (i386), \u548cSolaris (sparc). \u5e76\u4e14\u5728FreeBSD,
\nDebian Linux,
\nSlackware Linux, AIX, \u548cHP-UX\u4e0a\u4e5f\u80fd\u8fd0\u8f6c\u5f97\u5f88\u597d\u3002\u4f46\u662fdsniff\u9700\u8981\u51e0\u4e2a\u5176\u4ed6\u7684\u7b2c\u4e09\u65b9
\n\u8f6f\u4ef6\u8fdb
\n\u884c\u652f\u6301\uff0c\u4ed6\u4eec\u5206\u522b\u662f\uff0cBerkeley DB \uff0cOpenSSL\uff0c libpcap\uff0c libnet\uff0c libnids\u3002\u5982\u679c
\n\u6761\u4ef6\u5141
\n\u8bb8\u7684\u8bdd\uff0c\u4f60\u6700\u597d\u80fd\u591f\u4eb2\u81ea\u8bfb\u4e00\u8bfbdsniff\u7684\u6e90\u4ee3\u7801\uff0c\u4f60\u53ef\u4ee5\u5728
\nhttp:\/\/naughty.monkey.org\/~dugsong\/\u627e\u5230dsniff\u3002<\/p>\n

\n\u516d \u6df1\u5165sniff<\/p>\n

\u5355\u7eaf\u7684sniff\u7684\u529f\u80fd\u59cb\u7ec8\u662f\u5c40\u9650\u7684\uff0c\u6240\u4ee5\u5728\u5927\u591a\u6570\u7684\u60c5\u51b5\u4e0b\uff0csniff\u5f80\u5f80\u548c\u5176\u4ed6\u624b\u6bb5\u7ed3
\n\u5408\u8d77\u6765\u4f7f
\n\u7528\uff0csniff\u548cspoof\u5df2\u53ca\u5176\u4ed6\u6280\u672f\u624b\u6bb5\u7ed3\u5408\u5728\u4e00\u8d77\u5bf9\u7f51\u7edc\u6784\u6210\u7684\u5371\u5bb3\u662f\u5de8\u5927\u7684\u3002\u5355\u7eaf\u7684sni
\nff\u597d\u6bd4\u7f3a
\n\u4e86\u4e00\u53ea\u817f\uff0c\u65e0\u6cd5\u53d1\u6325\u5927\u7684\u4f5c\u7528\uff0c\u4f8b\u5982\u5728sniff\u539f\u7406\u4e00\u8282\u4e2d\u6211\u4eec\u8ba8\u8bba\u7684\u4f8b\u5b50\u91cc\uff0c\u6211\u4e00\u518d\u7684\u5f3a
\n\u8c03\u6211\u4eec\u4f7f
\n\u7528\u7684\u662f\u4e00\u4e2a\u666e\u901a\u7684HUB\u8fdb\u884c\u8fde\u63a5\u662f\u6709\u539f\u56e0\u7684\uff0c\u5982\u679c\u6211\u4eec\u628a\u5728\u56fe\u4e00\u4e2d\u7684HUB\u7528\u4e00\u4e2aswitch\u4ee3
\n\u66ff\uff0c\u90a3\u60c5\u51b5
\n\u5c31\u8981\u590d\u6742\u4e00\u4e9b\u4e86\uff0c\u5982\u56fe\u4e8c\u6240\u793a\uff1a<\/p>\n

\u56fe\uff08\u4e8c\uff09<\/p>\n

\n\u5728\u56fe\u4e8c\u4e2d\uff0c\u6211\u4eec\u7684\u673a\u5668A\u3001B\u3001C\u4e0eSwitch\u76f8\u8fde\u63a5\uff0c\u800cSwitch\u901a\u8fc7\u8def\u7531\u5668Router\u8bbf\u95ee\u5916\u90e8
\n\u7f51\u7edc\u3002\u6211
\n\u4eec\u5148\u6765\u4e86\u89e3Switch\u7684\u5de5\u4f5c\u539f\u7406\uff1a<\/p>\n

\u5728\u6211\u4eec\u56fe\u4e00\u4e2d\u7684 HUB \u53ea\u662f\u7b80\u5355\u5730\u628a\u6240\u63a5\u6536\u5230\u7684\u4fe1\u53f7\u901a\u8fc7\u6240\u6709\u7aef\u53e3\uff08\u9664\u4e86\u4fe1\u53f7\u6765\u7684\u90a3
\n\u4e2a\u53e3\uff09\u91cd\u590d
\n\u53d1\u9001\u51fa\u53bb\u4e0d\u540c\uff0c\u800c\u56fe\u4e8c\u4e2d\u7684Switch\u5374\u53ef\u4ee5\u68c0\u67e5\u6bcf\u4e00\u4e2a\u6536\u5230\u7684\u6570\u636e\u5305\uff0c\u5e76\u5bf9\u6570\u636e\u5305\u8fdb\u884c\u76f8
\n\u5e94\u7684\u5904\u7406\u3002
\n\u5728Switch\u5185\u4fdd\u5b58\u7740\u6bcf\u4e00\u4e2a\u7f51\u6bb5\u4e0a\u6240\u6709\u8282\u70b9\u7684\u7269\u7406\u5730\u5740\uff0c\u53ea\u5141\u8bb8\u5fc5\u8981\u7684\u7f51\u7edc\u6d41\u91cf\u901a\u8fc7Switc
\nh\u3002\u4e3e\u4f8b\u6765
\n\u8bf4\uff0c\u5f53Switch\u63a5\u6536\u5230\u4e00\u4e2a\u6570\u636e\u5305\u4e4b\u540e\uff0c\u6839\u636e\u81ea\u8eab\u4fdd\u5b58\u7684\u7f51\u7edc\u5730\u5740\u8868\u68c0\u67e5\u6570\u636e\u5305\u5185\u5305\u542b\u7684
\n\u53d1\u9001\u548c\u63a5\u6536
\n\u65b9\u5730\u5740\u3002\u5982\u679c\u63a5\u6536\u65b9\u4f4d\u4e8e\u53d1\u9001\u65b9\u7f51\u6bb5\uff0c\u8be5\u6570\u636e\u5305\u5c31\u4f1a\u88abSwitch\u4e22\u5f03\uff0c\u4e0d\u80fd\u901a\u8fc7\u4ea4\u6362\u673a\u4f20
\n\u9001\u5230\u5176\u5b83\u7684
\n\u7f51\u6bb5\uff1b\u5982\u679c\u63a5\u6536\u65b9\u548c\u53d1\u9001\u65b9\u4f4d\u4e8e\u4e24\u4e2a\u4e0d\u540c\u7684\u7f51\u6bb5\uff0c\u8be5\u6570\u636e\u5305\u5c31\u4f1a\u88abSwitch\u8f6c\u53d1\u5230\u76ee\u6807\u7f51
\n\u6bb5\u3002\u8fd9\u6837\uff0c
\n\u901a\u8fc7\u4ea4\u6362\u673a\u7684\u8fc7\u6ee4\u548c\u8f6c\u53d1\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514d\u7f51\u7edc\u5e7f\u64ad\u98ce\u66b4\uff0c\u51cf\u5c11\u8bef\u5305\u548c\u9519\u5305\u7684\u51fa\u73b0\u3002\u987a\u4fbf
\n\u8bf4\u4e00\u53e5\uff0c\u73b0\u5728
\nSwitch\u548cHUB\u7684\u4ef7\u683c\u76f8\u53bb\u65e0\u51e0\uff0c\u6240\u4ee5hub\u6b63\u9010\u6e10\u88ab\u7f51\u7edc\u4ea4\u6362\u673a\u53d6\u4ee3\u3002<\/p>\n

\u73b0\u5728\u56de\u5230\u6211\u4eec\u7684\u4f8b\u5b50\u4e2d\u6765\uff0c\u5728\u56fe\u4e8c\u4e2d\u4ecd\u7136\u548c\u56fe\u4e00\u4e00\u6837\uff0c\u6211\u4eec\u5047\u8bbe\u673a\u5668A\u4e0a\u7684\u7ba1\u7406\u5458\u4e3a\u4e86
\n\u7ef4\u62a4\u673a\u5668C\uff0c
\n\u4f7f\u7528\u4e86\u4e00\u4e2aFTP\u547d\u4ee4\u5411\u673a\u5668C\u8fdb\u884c\u8fdc\u7a0b\u767b\u9646\uff0c\u90a3\u4e48\u5728\u8fd9\u91cc\uff0c\u6570\u636e\u662f\u8fd9\u6837\u8d70\u7684\uff1a\u9996\u5148\u673a\u5668A\u4e0a
\n\u7684\u7ba1\u7406\u5458\u8f93\u5165
\n\u7684\u767b\u9646\u673a\u5668C\u7684FTP\u53e3\u4ee4\u7ecf\u8fc7\u5e94\u7528\u5c42FTP\u534f\u8bae\u3001\u4f20\u8f93\u5c42TCP\u534f\u8bae\u3001\u7f51\u7edc\u5c42IP\u534f\u8bae\u3001\u6570\u636e\u94fe\u8def
\n\u5c42\u4e0a\u7684\u4ee5\u592a\u7f51
\n\u9a71\u52a8\u7a0b\u5e8f\u4e00\u5c42\u4e00\u5c42\u7684\u5305\u88f9\uff0c\u6700\u540e\u9001\u5230\u4e86\u7269\u7406\u5c42\uff0c\u6211\u4eec\u7684\u7f51\u7ebf\u4e0a\u3002\u63a5\u4e0b\u6765\u6570\u636e\u5e27\u9001\u5230\u4e86Swi
\ntch\u4e0a\uff0c\u800c
\nSwitch\u68c0\u67e5\u6570\u636e\u5e27\u4e2d\u7684\u76ee\u7684\u5730\u5740\uff0c\u5e76\u5728\u4ed6\u81ea\u8eab\u4fdd\u5b58\u7684\u7f51\u7edc\u5730\u5740\u8868\u4e2d\u77e5\u9053\u4e86\u4ed6\u5e94\u8be5\u628a\u8fd9\u6570
\n\u636e\u5e27\u53d1\u5230\u673a\u5668
\nC\u90a3\u91cc\uff0c\u4e8e\u662f\uff0c\u63a5\u4e0b\u6765\u673a\u5668C\u63a5\u6536\u5230\u4e86\u4eceA\u53d1\u6765\u7684\u4fe1\u606f\uff0c\u53d1\u73b0\u4ed6\u662f\u53d1\u7ed9\u81ea\u5df1\u7684\u4fe1\u606f\uff0c\u4e8e\u662f\u8fdb
\n\u884c\u5206\u6790\u5904\u7406\u3002<\/p>\n

OK\uff0c\u73b0\u5728\u6211\u4eec\u673a\u5668B\u4e0a\u7684\u7ba1\u7406\u5458\u7684\u597d\u5947\u5fc3\u53ea\u80fd\u6df1\u6df1\u7684\u57cb\u85cf\u5728\u5fc3\u91cc\u4e86\uff0c\u56e0\u4e3a\u6570\u636e\u5305\u6839\u672c
\n\u5c31\u6ca1\u6709\u7ecf\u8fc7\u4ed6\uff0c
\n\u5c31\u7b97\u4ed6\u628a\u81ea\u5df1\u7684\u7f51\u5361\u8bbe\u7f6e\u6210\u6df7\u6742\u6a21\u5f0f\u4e5f\u662f\u6709\u529b\u65e0\u5904\u4f7f\u3002<\/p>\n

\u5728\u4e86\u89e3\u5728\u4e00\u4e2aSwitch\u73af\u5883\u4e0b\u539f\u7406\u540e\uff0c\u6211\u4eec\u7ed3\u5408\u4e00\u4e9b\u624b\u6bb5\u53bb\u8bbe\u6cd5sniff\uff0c\u662f\u7684\uff0c\u6211\u4eec\u53ef\u4ee5
\n\u505a\u5230\u8fd9\u4e00\u70b9\uff0c
\n\u6709\u8bb8\u591a\u7684\u624b\u6bb5\u53ef\u4ee5\u8ba9\u7ba1\u7406\u5458B\u6ee1\u8db3\u4ed6\u7684\u597d\u5947\u5fc3\uff0c\u5728\u4e0b\u9762\u6211\u4f1a\u63d0\u51fa\u51e0\u4e2a\u529e\u6cd5\uff0c\u5f53\u7136\u53ea\u662f\u5176\u4e2d
\n\u7684\u4e00\u4e9b\u529e\u6cd5
\n\u800c\u5df2\u3002<\/p>\n

1 ARP Spoof<\/p>\n

\u5728\u57fa\u4e8eIP\u901a\u4fe1\u7684\u5185\u90e8\u7f51\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 ARP Spoof \u7684\u624b\u6bb5\uff0c\u4e86\u89e3\u4ec0\u4e48\u662fARP
\nSpoof\u7684\u524d\u63d0\u4f60\u5148
\n\u8981\u660e\u767d\u4e00\u4e0b\u4ec0\u4e48\u662fARP\u548cRARP\u534f\u8bae\uff0c\u4ec0\u4e48\u662fMAC\u5730\u5740\uff0c\u4ec0\u4e48\u53c8\u662fIP\u5730\u5740\u3002ARP\u534f\u8bae\u662f\u5730\u5740\u8f6c
\n\u6362\u534f\u8bae\uff0c
\nRARP\u88ab\u79f0\u4e3a\u53cd\u5411\u5730\u5740\u8f6c\u6362\u534f\u8bae,\u4ed6\u4eec\u8d1f\u8d23\u628aIP\u5730\u5740\u548cMAC\u5730\u5740\u8fdb\u884c\u76f8\u4e92\u8f6c\u6362\u5bf9\u5e94\u3002<\/p>\n

ARP Spoof \u653b\u51fb\u7684\u6839\u672c\u539f\u7406\u662f\u56e0\u4e3a\u8ba1\u7b97\u673a\u4e2d\u7ef4\u62a4\u7740\u4e00\u4e2a ARP \u9ad8\u901f\u7f13\u5b58\uff0c\u5e76\u4e14\u8fd9\u4e2aARP
\n\u9ad8\u901f\u7f13\u5b58\u662f
\n\u968f\u7740\u8ba1\u7b97\u673a\u4e0d\u65ad\u7684\u53d1\u51faARP\u8bf7\u6c42\u548c\u6536\u5230ARP\u54cd\u5e94\u800c\u4e0d\u65ad\u7684\u66f4\u65b0\u7684\uff0cARP \u9ad8\u901f\u7f13\u5b58\u7684\u76ee\u7684\u662f
\n\u628a\u673a\u5668\u7684IP\u5730
\n\u5740\u548cMAC\u5730\u5740\u76f8\u4e92\u6620\u5c04\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528 arp \u547d\u4ee4\u6765\u67e5\u770b\u4f60\u81ea\u5df1\u7684 ARP \u9ad8\u901f\u7f13\u5b58\u3002\u73b0\u5728\u8bbe\u60f3
\n\u4e00\u4e0b\uff0c\u4e00\u4e2a
\nSwitch\u5de5\u4f5c\u5728\u6570\u636e\u94fe\u8def\u5c42\uff0c\u4ed6\u6839\u636eMAC\u5730\u5740\u6765\u8f6c\u53d1\u4ed6\u6240\u63a5\u6536\u7684\u6570\u636e\u5305\uff0c\u800c\u8ba1\u7b97\u5668\u7ef4\u62a4\u7684
\nARP \u9ad8\u901f\u7f13\u5b58
\n\u5374\u662f\u52a8\u6001\u7684……\u4f60\u60f3\u5230\u4ec0\u4e48\u4e86\u5417\uff1f<\/p>\n

\u4e3a\u4e86\u52a0\u6df1\u7406\u89e3\uff0c\u73b0\u5728\u7ed9\u6211\u4eec\u7684\u673a\u5668\u7f16\u4e0a\u53f7\uff0c\u673a\u5668A\uff1aIP\u5730\u5740\u4e3a 10.0.0.1 ,MAC\u5730\u5740\u4e3a
\n20-53-52-43-00-01 ,\u673a\u5668B\uff1aIP\u5730\u5740\u4e3a 10.0.0.2 ,MAC\u5730\u5740\u4e3a 20-53-52-43-00-02,\u673a\u5668
\nC\uff1aIP\u5730\u5740
\n\u4e3a 10.0.0.3 ,MAC\u5730\u5740\u4e3a 20-53-52-43-00-03 \u3002\u73b0\u5728\u673a\u5668B\u4e0a\u7684\u7ba1\u7406\u5458\u662f\u4e2a\u806a\u660e\u7684\u5bb6\u4f19
\n\uff0c\u4ed6\u5411\u673a\u5668
\nA\u53d1\u51fa\u4e00\u4e2a ARP Reply \uff08\u534f\u8bae\u6ca1\u6709\u89c4\u5b9a\u4e00\u5b9a\u8981\u7b49ARP Request\u51fa\u73b0\u624d \u80fd\u53d1\u9001ARP Reply\uff0c
\n\u4e5f\u6ca1\u6709
\n\u89c4\u5b9a\u4e00\u5b9a\u8981\u53d1\u9001\u8fc7ARP Request\u624d\u80fd\u63a5\u6536ARP Reply\uff09\uff0c\u5176\u4e2d\u7684\u76ee\u7684IP\u5730\u5740\u4e3a10.0.0.1\uff0c
\n\u76ee\u7684MAC
\n\u5730\u5740\u4e3a 20-53-52-43-00-01 \uff0c\u800c\u6e90IP\u5730\u5740\u4e3a10.0.0.3\uff0c\u6e90MAC\u5730\u5740\u4e3a
\n20-53-52-43-00-02 \uff0c\u597d\u4e86\uff0c
\n\u73b0\u5728\u673a\u5668A\u66f4\u65b0\u4e86\u4ed6\u7684 ARP \u9ad8\u901f\u7f13\u5b58\uff0c\u5e76\u76f8\u4fe1\u4e86IP\u5730\u5740\u4e3a10.0.0.3\u7684\u673a\u5668\u7684MAC\u5730\u5740\u662f
\n20-53-52-43-00-02 \u3002\u5f53\u673a\u5668A\u4e0a\u7684\u7ba1\u7406\u5458\u53d1\u51fa\u4e00\u6761FTP\u547d\u4ee4\u65f6—ftp 10.0.0.3\uff0c\u6570\u636e\u5305
\n\u88ab\u9001\u5230\u4e86
\nSwitch\uff0cSwitch\u67e5\u770b\u6570\u636e\u5305\u4e2d\u7684\u76ee\u7684\u5730\u5740\uff0c\u53d1\u73b0MAC\u4e3a 20-53-52-43-00-02 \uff0c\u4e8e\u662f\uff0c\u4ed6
\n\u628a\u6570\u636e\u5305
\n\u53d1\u5230\u4e86\u673a\u5668B\u4e0a\u3002\u518d\u8bbe\u60f3\u4e00\u4e0b\uff0c\u5982\u679c\u4e0d\u60f3\u5f71\u54cdA\u548cC\u4e4b\u95f4\u7684\u901a\u4fe1\u8be5\u600e\u4e48\u529e\uff1f\u4f60\u53ef\u4ee5\u540c\u65f6\u6b3a\u9a97
\n\u4ed6\u4eec\u53cc\u65b9\uff0c
\n\u6765\u4e00\u4e2a man-in-middle \u3002<\/p>\n

\u5f53\u7136\uff0c\u5728\u5b9e\u9645\u7684\u64cd\u4f5c\u4e2d\u4f60\u8fd8\u9700\u8981\u8003\u8651\u5230\u4e00\u4e9b\u5176\u4ed6\u7684\u4e8b\uff0c\u6bd4\u5982\u67d0\u4e9b\u64cd\u4f5c\u7cfb\u7edf\u5728\u4f1a\u4e3b\u52a8\u7684
\n\u53d1\u9001ARP\u8bf7
\n\u6c42\u5305\u6765\u66f4\u65b0\u76f8\u5e94\u7684ARP\u5165\u53e3\u7b49\u3002<\/p>\n

2. MAC Flooding<\/p>\n

\u5728\u4e0a\u9762\u6211\u4eec\u66fe\u7ecf\u63d0\u5230\u8fc7\uff0cSwitch\u4e4b\u6240\u4ee5\u80fd\u591f\u7531\u6570\u636e\u5305\u4e2d\u76ee\u7684MAC\u5730\u5740\u5224\u65ad\u51fa\u4ed6\u5e94\u8be5\u628a\u6570
\n\u636e\u5305\u53d1\u9001\u5230
\n\u90a3\u4e00\u4e2a\u7aef\u53e3\u4e0a\u662f\u6839\u636e\u4ed6\u672c\u8eab\u7ef4\u62a4\u7684\u4e00\u5f20\u5730\u5740\u8868\u3002\u8fd9\u5f20\u5730\u5740\u8868\u53ef\u80fd\u662f\u52a8\u6001\u7684\u4e5f\u53ef\u80fd\u662f\u9759\u6001
\n\u7684\uff0c\u8fd9\u8981\u770b
\nSwitch\u7684\u5382\u5546\u548cSwitch\u7684\u578b\u53f7\u6765\u5b9a\uff0c\u5bf9\u4e8e\u67d0\u4e9bSwitch\u6765\u8bf4\uff0c\u4ed6\u7ef4\u62a4\u7684\u662f\u4e00\u5f20\u52a8\u6001\u7684\u5730\u5740
\n\u8868\uff0c\u5e76\u4e14\u5730
\n\u5740\u8868\u7684\u5927\u5c0f\u662f\u6709\u4e0a\u9650\u7684\uff0c\u6bd4\u5982\u30003com Superstack Switch 3300 \uff083c16981 Hardware
\nv.1 Software v.2.10\uff09
\n\u5c31\u662f\u8fd9\u6837\u4e00\u79cdSwitch\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u53d1\u9001\u5927\u91cf\u9519\u8bef\u7684\u5730\u5740\u4fe1\u606f\u800c\u4f7fSWITCH\u7ef4\u62a4\u7684\u5730\u5740
\n\u8868\u201c\u6ea2\u51fa\u201d\uff0c
\n\u4ece\u800c\u4f7f\u4ed6\u53d8\u6210\u5e7f\u64ad\u6a21\u5f0f\u6765\u8fbe\u5230\u6211\u4eec\u8981 sniff \u673a\u5668A\u4e0e\u673a\u5668C\u4e4b\u95f4\u7684\u901a\u4fe1\u7684\u76ee\u7684\u3002<\/p>\n

3. Fake the MAC address<\/p>\n

\u4f2a\u9020MAC\u5730\u5740\u4e5f\u662f\u4e00\u4e2a\u5e38\u7528\u7684\u529e\u6cd5\uff0c\u4e0d\u8fc7\u8fd9\u8981\u57fa\u4e8e\u4f60\u7f51\u7edc\u5185\u7684Switch\u662f\u52a8\u6001\u66f4\u65b0\u5176\u5730\u5740
\n\u8868\uff0c\u8fd9\u5b9e
\n\u9645\u4e0a\u548c\u6211\u4eec\u4e0a\u9762\u8bf4\u5230\u7684 ARP Spoof \u6709\u4e9b\u7c7b\u4f3c\uff0c\u53ea\u4e0d\u8fc7\u73b0\u5728\u4f60\u662f\u60f3\u8981Switch\u76f8\u4fe1\u4f60\uff0c\u800c\u4e0d
\n\u662f\u8981\u673a\u5668A
\n\u76f8\u4fe1\u4f60\u3002\u56e0\u4e3aSwitch\u662f\u52a8\u6001\u66f4\u65b0\u5176\u5730\u5740\u8868\u7684\uff0c\u4f60\u8981\u505a\u7684\u4e8b\u60c5\u5c31\u662f\u544a\u8bc9Switch\uff1aHI,\u6211\u662f\u673a
\n\u5668C\u3002\u6362\u6210
\n\u6280\u672f\u4e0a\u7684\u95ee\u9898\u4f60\u53ea\u4e0d\u8fc7\u9700\u8981\u5411Switch\u53d1\u9001\u4f2a\u9020\u8fc7\u7684\u6570\u636e\u5305\uff0c\u5176\u4e2d\u6e90MAC\u5730\u5740\u5bf9\u5e94\u7684\u662f\u673a\u5668
\nC\u7684MAC\u5730\u5740\uff0c
\n\u73b0\u5728Switch\u5c31\u628a\u673a\u5668C\u548c\u4f60\u7684\u7aef\u53e3\u5bf9\u5e94\u8d77\u6765\u4e86\u3002\u4e0d\u8fc7\u5176\u4e2d\u5b58\u5728\u4e00\u4e2a\u95ee\u9898\uff0c\u73b0\u5728\u673a\u5668C\u4e5f\u4f1a
\n\u8bf4\u4e86\uff1a
\nHI\uff0cSwitch\u8001\u5927\uff0c\u6211\u624d\u662f\u673a\u5668C\u5462\uff01\uff0c\u73b0\u5728\u4f60\u8be5\u600e\u4e48\u529e\uff1f\u5207\uff0c\u8fd8\u7528\u95ee\uff01\u8ba9\u4ed6\u8bf4\u4e0d\u4e86\u8bdd\u5c31\u53ef
\n\u4ee5\u4e86\uff0c
\nDOS\u8fd8\u662f\u5176\u4ed6\u4ec0\u4e48\uff0c\u968f\u4fbf\u4f60\u4e86……<\/p>\n

4. ICMP Router Advertisements<\/p>\n

\u8fd9\u4e3b\u8981\u662f\u7531ICMP\u8def\u7531\u5668\u53d1\u73b0\u534f\u8bae(IRDP)\u7684\u7f3a\u9677\u5f15\u8d77\u7684\uff0c\u5728Windows 95\u300198\u30012000\u53caSu
\nnOS\u3001
\nSolaris 2.6\u7b49\u7cfb\u7edf\u4e2d\uff0c\u90fd\u4f7f\u7528\u4e86IRDP\u534f\u8bae\uff0cSunOS\u7cfb\u7edf\u53ea\u5728\u67d0\u4e9b\u7279\u5b9a\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528\u8be5\u534f
\n\u8bae\uff0c\u800c
\nWindows95 ,Windows95b, Windows98, Windows98se, \u548c Windows2000\u90fd\u662f\u9ed8\u8ba4\u7684\u4f7f\u7528IR
\nDP\u534f\u8bae\u3002
\nIRDP\u534f\u8bae\u7684\u4e3b\u8981\u5185\u5bb9\u5c31\u662f\u544a\u8bc9\u4eba\u4eec\u8c01\u662f\u8def\u7531\u5668\uff0c\u8bbe\u60f3\u4e00\u4e0b\uff0c\u4e00\u4e2aHACK\u5229\u7528IRDP\u5ba3\u79f0\u81ea\u5df1
\n\u662f\u8def\u7531\u5668\u7684
\n\u60c5\u51b5\u4f1a\u6709\u591a\u4e48\u7684\u7cdf\u7cd5\uff01\u6240\u6709\u76f8\u4fe1HACK\u7684\u8bf7\u6c42\u7684\u673a\u5668\u628a\u4ed6\u4eec\u6240\u6709\u7684\u6570\u636e\u90fd\u53d1\u9001\u7ed9HACK\u6240\u63a7
\n\u5236\u7684\u673a\u5668………<\/p>\n

5. ICMP Redirect<\/p>\n

\u6240\u8c13ICMP\u91cd\u5b9a\u5411\uff0c\u5c31\u662f\u6307\u544a\u8bc9\u673a\u5668\u5411\u53e6\u4e00\u4e2a\u4e0d\u540c\u7684\u8def\u7531\u53d1\u9001\u4ed6\u7684\u6570\u636e\u5305\uff0cICMP\u91cd\u5b9a\u5411
\n\u901a\u5e38\u4f7f
\n\u7528\u5728\u8fd9\u6837\u7684\u573a\u5408\u4e0b\uff0c\u5047\u8bbeA\u4e0eB\u4e24\u53f0\u673a\u5668\u5206\u522b\u4f4d\u4e8e\u540c\u4e00\u4e2a\u7269\u7406\u7f51\u6bb5\u5185\u7684\u4e24\u4e2a\u903b\u8f91\u5b50\u7f51\u5185\uff0c
\n\u800cA\u548cB\u90fd
\n\u4e0d\u77e5\u9053\u8fd9\u4e00\u70b9\uff0c\u53ea\u6709\u8def\u7531\u5668\u77e5\u9053\uff0c\u5f53A\u53d1\u9001\u7ed9B\u7684\u6570\u636e\u5230\u8fbe\u8def\u7531\u5668\u7684\u65f6\u5019\uff0c\u8def\u7531\u5668\u4f1a\u5411A\u9001
\n\u4e00\u4e2aICMP
\n\u91cd\u5b9a\u5411\u5305\u88f9\uff0c\u544a\u8bc9A\uff1aHI\uff0c\u522b\u518d\u9001\u6570\u636e\u7ed9\u6211\u8f6c\u4ea4\u4e86\uff0c\u4f60\u5c31\u76f4\u63a5\u9001\u5230B\u90a3\u91cc\u5c31\u53ef\u4ee5\u4e86\u3002\u8bbe\u60f3
\n\u4e00\u4e0b\uff0c
\n\u4e00\u4e2ahack\u5b8c\u5168\u53ef\u4ee5\u5229\u7528\u8fd9\u4e00\u70b9\uff0c\u4f7f\u5f97A\u53d1\u9001\u7ed9B\u7684\u6570\u636e\u7ecf\u8fc7\u4ed6\u3002<\/p>\n

\u4e0a\u9762\u63d0\u5230\u7684\u8fd9\u4e9b\u65b9\u6cd5\u53ea\u4e0d\u662f\u5176\u4e2d\u7684\u4e00\u4e9b\uff0c\u4e3a\u4e86\u914d\u5408sniff\u80fd\u591f\u5de5\u4f5c\u5f97\u66f4\u6709\u6548\u7387\uff0c\u8fd8\u6709\u5176
\n\u4ed6\u8bb8\u591a
\n\u7684\u529e\u6cd5\uff0c\u5176\u5b9esniff\u7684\u76ee\u7684\u8bf4\u7a7f\u4e86\u53ea\u6709\u4e00\u4e2a\uff0c\u5c31\u662f\u6293\u5305\uff0c\u4ece\u6293\u5305\u8fd9\u4e2a\u6982\u5ff5\u4e0a\u5f15\u4f38\u4e0b\u53bb\uff0c\u6240
\n\u6709\u4e3a\u4e86\u80fd
\n\u591f\u6293\u5230\u7f51\u7edc\u4e0a\u7684\u4fe1\u606f\u5305\u800c\u91c7\u7528\u7684\u6280\u672f\u90fd\u53ef\u4ee5\u5f52\u5165sniff\uff0c\u5355\u7eaf\u7684sniff\u662f\u6ca1\u6709\u4ec0\u4e48\u6548\u7387\u7684
\n\u3002\u4f60\u8fd8\u80fd
\n\u60f3\u5230\u4ec0\u4e48\u5417\uff1f\u8fdb\u653b\u8def\u7531\u5668\uff0c\u5728\u8def\u7531\u5668\u4e0a\u653e\u7f6esniff……\uff0c\u5728\u7cfb\u7edf\u5185\u6838\u4e2d\u690d\u5165sniff…..
\n.\u7b49\u7b49\u3002<\/p>\n

\n\u4e03 \u5982\u4f55\u9632\u6b62SNIFF<\/p>\n

\u9632\u6b62sniff\u6700\u6709\u6548\u7684\u624b\u6bb5\u5c31\u662f\u8fdb\u884c\u5408\u7406\u7684\u7f51\u7edc\u5206\u6bb5\uff0c\u5e76\u5728\u7f51\u7edc\u4e2d\u4f7f\u7528\u4ea4\u6362\u673a\u548c\u7f51\u6865\uff0c\u5728
\n\u7406\u60f3\u7684\u60c5
\n\u51b5\u4e0b\u4f7f\u6bcf\u4e00\u53f0\u673a\u5668\u90fd\u62e5\u6709\u81ea\u5df1\u7684\u7f51\u7edc\u6bb5\uff0c\u5f53\u7136\u8fd9\u4f1a\u4f7f\u4f60\u7684\u7f51\u7edc\u5efa\u8bbe\u8d39\u7528\u589e\u52a0\u5f88\u591a\uff0c\u6240\u4ee5
\n\u4f60\u53ef\u4ee5\u5c3d\u91cf
\n\u4f7f\u76f8\u4e92\u4fe1\u4efb\u7684\u673a\u5668\u5c5e\u4e8e\u540c\u4e00\u4e2a\u7f51\u6bb5\uff0c\u4f7f\u4ed6\u4eec\u4e92\u76f8\u4e4b\u95f4\u4e0d\u5fc5\u62c5\u5fc3sniff\u7684\u5b58\u5728\u3002\u5e76\u5728\u7f51\u6bb5\u4e8e
\n\u7f51\u6bb5\u95f4\u8fdb
\n\u884c\u786c\u4ef6\u5c4f\u969c\u3002\u4f60\u4e5f\u53ef\u4ee5\u4f7f\u7528\u52a0\u5bc6\u6280\u672f\u5bf9\u4f60\u5728\u7f51\u7edc\u4e2d\u4f20\u9001\u7684\u654f\u611f\u6570\u636e\u5982\u6237ID\u6216\u53e3\u4ee4\uff0c\u4f60\u7684
\n\u94f6\u884c\u5e10\u53f7\uff0c
\n\u5546\u4e1a\u673a\u5bc6\u7b49\u8fdb\u884c\u52a0\u5bc6\uff0c\u4f60\u53ef\u4ee5\u9009\u7528\uff33\uff33\uff28\u7b49\u52a0\u5bc6\u624b\u6bb5\u3002\u4e3a\u4e86\u9632\u6b62ARP\u6b3a\u9a97\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u6c38
\n\u4e45\u7684\uff21\uff32\uff30
\n\u7f13\u5b58\u6761\u76ee\uff0c\u53cd\u6b63\u4e0a\u9762\u7684\u653b\u51fb\u624b\u6bb5\u548c\u539f\u7406\u4f60\u4e5f\u770b\u4e86\uff0c\u4f60\u5c31\u53cd\u8fc7\u6765\u60f3\u60f3\u8be5\u600e\u4e48\u529e\u597d\u4e86\u3002\u4e0d\u8fc7
\n\u6709\u76fe\u5fc5\u6709\u77db\uff0c
\n\u5e73\u65f6\u7684\u5b89\u5168\u610f\u8bc6\u624d\u662f\u6700\u91cd\u8981\u7684\u3002<\/p>\n

\uff08\u6ce8\uff1a\u4ee5\u4e0b\u5173\u4e8eAntiSniff\u7684\u4ecb\u7ecd\u53d6\u81f3backend\u7ffb\u8bd1\u6574\u7406\u7684L0pht AntiSniff \u6280\u672f\u6587\u6863
\n\u4e00\u6587\uff09<\/p>\n

\u5f53\u4f60\u505a\u505a\u5c42\u5c42\u4fdd\u62a4\u540e\uff0c\u4f60\u8fd8\u662f\u6000\u7591\u81ea\u5df1\u7684\u7f51\u7edc\u4e0a\u5b58\u5728sniff\u8be5\u600e\u4e48\u529e\uff1f L0pht \u5c0f\u7ec4\u4e3a
\n\u4e86\u63a2\u6d4b
\nsniff\u4e13\u95e8\u53d1\u5e03\u4e86\u4e00\u4e2a\u8f6f\u4ef6\u3000AntiSniff\uff0c\u5f53\u7136\u8fd9\u4e2a\u8f6f\u4ef6\u4e0d\u662f\u514d\u8d39\u7684\uff1a\uff09,AntiSniff \u5de5\u5177
\n\u7528\u4e8e\u68c0\u6d4b\u5c40
\n\u57df\u7f51\u4e2d\u662f\u5426\u6709\u673a\u5668\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\uff0cAntiSniff Version 1.x\u88ab\u8bbe\u8ba1\u4e3a\u8fd0\u884c\u5728\u4ee5\u592a\u7f51\u7684Wind
\nows\u7cfb\u7edf\u4e2d\uff0c
\n\u63d0\u4f9b\u4e86\u7b80\u5355\u6613\u7528\u7684\u56fe\u5f62\u7528\u6237\u754c\u9762\uff0cAntiSniff Version 1.x\u3000\u4e3b\u8981\u5de5\u4f5c\u5728\u975e\u4ea4\u6362\u73af\u5883\u4e0b\u7684
\n\u672c\u5730\u7f51\u6bb5\u4e2d\uff0c
\n\u5982\u679c\u8fd0\u884c\u5728\u4ea4\u6362\u73af\u5883\u4e0b\u5176\u529f\u80fd\u5c06\u5927\u6253\u6298\u6263\u3002AntiSniff Ver 2.0 \u5c06\u4e0d\u4f46\u80fd\u5728\u672c\u5730\u7f51\u6bb5\u4e2d
\n\uff0c\u800c\u4e14\u80fd\u591f\u7a7f
\n\u8fc7\u8def\u7531\u5668\u548c\u4ea4\u6362\u673a\u8fdb\u884c\u5de5\u4f5c\u3002<\/p>\n

\u25c6 \u64cd\u4f5c\u7cfb\u7edf\u7c7b\u7279\u6b8a\u6d4b\u8bd5<\/p>\n

Linux \u5185\u6838\u6d4b\u8bd5<\/p>\n

\u65e7\u7248\u672c\u7684Linux\u5185\u6838\u5b58\u5728\u4e00\u4e2a\u5947\u602a\u7684\u7279\u6027\uff0c\u53ef\u88ab\u7528\u4e8e\u786e\u5b9a\u673a\u5668\u662f\u5426\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u3002\u5728\u6b63
\n\u5e38\u60c5\u5f62\u4e0b\uff0c
\n\u7f51\u5361\u4f1a\u8fc7\u6ee4\u548c\u4e22\u5f03\u90a3\u4e9b\u76ee\u6807\u5730\u5740\u4e0d\u662f\u672c\u673aMAC\u5730\u5740\u6216\u4ee5\u592a\u7f51\u5e7f\u64ad\u5730\u5740\u7684\u6570\u636e\u5305\u3002\u5982\u679c\u6570\u636e
\n\u5305\u7684\u76ee\u6807\u5730
\n\u5740\u4e3a\u672c\u673a\u4ee5\u592a\u7f51\u5730\u5740\u6216\u5e7f\u64ad\u5730\u5740\uff0c\u5c06\u4f20\u9001\u7ed9\u5185\u6838\u8fdb\u884c\u5904\u7406\uff0c\u56e0\u4e3a\u5176\u8ba4\u4e3a\u8be5\u4ee5\u592a\u7f51\u6570\u636e\u5e27
\n\u5305\u542b\u4e86\u672c\u673a
\n\u7684\u6b63\u786eIP\u5730\u5740\u6216\u8be5\u7f51\u7edc\u5e7f\u64ad\u5730\u5740\u3002\u5982\u679c\u7f51\u5361\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\uff0c\u5219\u6bcf\u4e2a\u6570\u636e\u5305\u90fd\u4f1a\u4f20\u9012\u7ed9\u64cd
\n\u4f5c\u7cfb\u7edf\u8fdb\u884c
\n\u5206\u6790\u6216\u5904\u7406\u3002\u8bb8\u591a\u7248\u672c\u7684 Linux\u5185\u6838\u53ea\u68c0\u67e5\u6570\u636e\u5305\u4e2d\u7684IP\u5730\u5740\u4ee5\u786e\u5b9a\u662f\u5426\u5b58\u653e\u5230IP\u5806\u6808
\n\u4e2d\u8fdb\u884c\u5904\u7406\u3002
\n\u4e3a\u4e86\u5229\u7528\u8fd9\u4e00\u70b9\uff0cAntiSniff\u6784\u9020\u4e00\u4e2a\u65e0\u6548\u4ee5\u592a\u7f51\u5730\u5740\u800cIP\u5730\u5740\u6709\u6548\u7684\u6570\u636e\u5305\u3002\u5bf9\u4e8e\u4f7f\u7528
\n\u4e86\u8fd9\u4e9b\u5185\u6838
\n\u7248\u672c\u548c\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u7684Linux\u7cfb\u7edf\uff0c\u7531\u4e8e\u53ea\u68c0\u67e5\u5230IP\u5730\u5740\u6709\u6548\u800c\u5c06\u5176\u63a5\u6536\u5e76\u5b58\u653e\u5230\u76f8\u5e94\u5806
\n\u6808\u4e2d\u3002\u901a\u8fc7
\n\u5728\u8fd9\u4e2a\u4f2a\u9020\u7684\u4ee5\u592a\u7f51\u6570\u636e\u5e27\u4e2d\u6784\u9020\u4e00\u4e2aICMP ECHO\u8bf7\u6c42\uff0c\u8fd9\u4e9b\u7cfb\u7edf\u4f1a\u8fd4\u56de\u54cd\u5e94\u5305(\u5982\u679c\u5904
\n\u4e8e\u6df7\u6742\u6a21\u5f0f)
\n\u6216\u5ffd\u7565(\u5982\u679c\u4e0d\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f)\uff0c\u4ece\u800c\u66b4\u9732\u5176\u5de5\u4f5c\u6a21\u5f0f\u3002\u5f53\u4f2a\u9020\u7684\u4ee5\u592a\u7f51\u6570\u636e\u5e27\u4e2d\u7684IP\u5730
\n\u5740\u8bbe\u7f6e\u4e3a\u7f51\u7edc
\n\u5e7f\u64ad\u5730\u5740\u65f6\u8fd9\u4e2a\u6d4b\u8bd5\u975e\u5e38\u6709\u6548\u3002 AntiSniff\u7684\u4f7f\u7528\u8005\u53ef\u4ee5\u4fee\u6539\u4f2a\u9020\u7684\u4ee5\u592a\u7f51\u5740\uff0c\u7f3a\u7701\u503c
\n\u4e3a66:66:66:66:66:66\u3002<\/p>\n

NetBSD<\/p>\n

\u8bb8\u591aNetBSD\u5185\u6838\u5177\u6709\u4e0e\u4e0a\u8ff0Linux\u5185\u6838\u76f8\u540c\u7684\u7279\u6027\uff0c\u4e0d\u8fc7\u4f2a\u9020\u4ee5\u592a\u7f51\u6570\u636e\u5e27\u4e2d\u7684 IP\u5730
\n\u5740\u5fc5\u987b\u8bbe\u4e3a\u5e7f
\n\u64ad\u5730\u5740\u3002<\/p>\n

Windows 95\/98\/NT<\/p>\n

\u6839\u636e\u5bf9\u7f51\u7edc\u9a71\u52a8\u7a0b\u5e8f\u5934\u6587\u4ef6\u7684\u4e86\u89e3\uff0c\u53ef\u4ee5\u77e5\u9053\u5f53\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u65f6\uff0cMicrosoft\u7684\u64cd\u4f5c\u7cfb
\n\u7edf\u4f1a\u786e\u5207\u5730\u68c0
\n\u67e5\u6bcf\u4e2a\u5305\u7684\u4ee5\u592a\u7f51\u5730\u5740\u3002\u5982\u679c\u4e0e\u7f51\u5361\u7684\u4ee5\u592a\u7f51\u5730\u5740\u5339\u914d\uff0c\u5c06\u4f5c\u4e3a\u76ee\u6807IP\u5730\u5740\u4e3a\u672c\u673a\u7684\u6570
\n\u636e\u5305\u5b58\u653e\u5230\u76f8\u5e94
\n\u5806\u6808\u4e2d\u5904\u7406\u3002\u53ef\u4ee5\u88ab\u5229\u7528\u7684\u4e00\u70b9\u662f\u7cfb\u7edf\u5bf9\u4ee5\u592a\u7f51\u5e7f\u64ad\u5305\u7684\u5206\u6790\u3002\u5728\u6b63\u5e38\u60c5\u5f62\u4e0b\uff0c\u4f8b\u5982\u673a
\n\u5668\u5de5\u4f5c\u5728\u975e\u6df7
\n\u6742\u6a21\u5f0f\u4e0b\uff0c\u7f51\u5361\u53ea\u5411\u7cfb\u7edf\u5185\u6838\u4f20\u8f93\u90a3\u4e9b\u76ee\u6807\u4ee5\u592a\u7f51\u5740\u4e0e\u5176\u5339\u914d\u6216\u4e3a\u4ee5\u592a\u7f51\u5e7f\u64ad\u5730\u5740(ff:f
\nf:ff:ff:ff:ff)
\n\u7684\u6570\u636e\u5305\u3002\u5982\u679c\u673a\u5668\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u4e0b\uff0c\u7f51\u7edc\u9a71\u52a8\u7a0b\u5e8f\u4ecd\u7136\u4f1a\u68c0\u67e5\u6bcf\u4e2a\u6570\u636e\u5305\u7684\u4ee5\u592a\u7f51\u5730
\n\u5740\uff0c\u4f46\u68c0\u67e5\u662f\u5426
\n\u4e3a\u5e7f\u64ad\u5305\u65f6\u5374\u53ea\u68c0\u67e5\u59348\u4f4d\u5730\u5740\u662f\u5426\u4e3a0xff\u3002\u56e0\u6b64\uff0c\u4e3a\u4e86\u4f7f\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u7684\u7cfb\u7edf\u8fd4\u56de\u54cd\u5e94
\n\u4fe1\u606f\uff0c
\nAntiSniff\u6784\u9020\u4ee5\u592a\u7f51\u5730\u5740\u4e3aff:00:00:00:00:00\u4e14\u542b\u6709\u6b63\u786e\u76ee\u6807IP \u5730\u5740\u7684\u6570\u636e\u5305\uff0c\u5f53Mi
\ncrosoft\u7684\u64cd
\n\u4f5c\u7cfb\u7edf\u63a5\u6536\u5230\u8fd9\u4e2a\u6570\u636e\u5305\u65f6\uff0c\u5c06\u6839\u636e\u7f51\u7edc\u9a71\u52a8\u7a0b\u5e8f\u68c0\u67e5\u5230\u7684\u7ec6\u5fae\u5dee\u522b\u800c\u8fd4\u56de\u54cd\u5e94\u5305(\u5982\u679c
\n\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f)
\n\u6216\u4e22\u5f03\u8fd9\u4e2a\u6570\u636e\u5305(\u5982\u679c\u5904\u4e8e\u975e\u6df7\u6742\u6a21\u5f0f)\u3002<\/p>\n

\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u4e2a\u68c0\u67e5\u4e0e\u4f7f\u7528\u7684\u7f51\u7edc\u9a71\u52a8\u7a0b\u5e8f\u6709\u5173\u3002Microsoft\u7f3a\u7701\u7684\u7f51\u7edc\u9a71\u52a8\u7a0b\u5e8f
\n\u5177\u6709\u4ee5\u4e0a\u7279\u6027\uff0c
\n\u5927\u591a\u6570\u7684\u5382\u5546\u4e3a\u4e86\u4fdd\u6301\u517c\u5bb9\u6027\u4e5f\u7ee7\u627f\u4e86\u8fd9\u4e9b\u7279\u6027\u3002\u4e0d\u8fc7\u6709\u4e9b\u7f51\u5361\u4f1a\u5728\u5176\u786c\u4ef6\u5c42\u4e2d\u68c0\u67e5\u4ee5
\n\u592a\u7f51\u5730\u5740\u7684\u59348\u4f4d\uff0c
\n\u6240\u4ee5\u53ef\u80fd\u4f1a\u65e0\u8bba\u7cfb\u7edf\u771f\u6b63\u7684\u72b6\u6001\u662f\u4ec0\u4e48\u90fd\u603b\u662f\u8fd4\u56de\u6b63\u503c\u3002\u5173\u4e8e\u8fd9\u7c7b\u7f51\u5361\u548c\u9a71\u52a8\u7a0b\u5e8f\u8bf7\u8bbf
\n\u95ee
\nAntiSniff Ver 1.x\u7684web\u7f51\u7ad9\u3002<\/p>\n

\u25c6 DNS \u6d4b\u8bd5<\/p>\n

\u8fdb\u884cDNS\u6d4b\u8bd5\u7684\u539f\u56e0\u662f\u8bb8\u591a\u653b\u51fb\u8005\u4f7f\u7528\u7684\u7f51\u7edc\u6570\u636e\u6536\u96c6\u5de5\u5177\u90fd\u5bf9IP\u5730\u5740\u8fdb\u884c\u53cd\u5411 DNS\u89e3
\n\u6790\uff0c\u56e0\u4e3a\u4ed6\u4eec
\n\u5e0c\u671b\u6839\u636e\u57df\u540d\u5bfb\u627e\u66f4\u6709\u4ef7\u503c\u7684\u4e3b\u673a\u3002\u4f8b\u5982joepc1.foo.bar\u5bf9\u653b\u51fb\u8005\u7684\u5438\u5f15\u529b\u5f80\u5f80\u4e0d\u5982pay
\nroll.foo.bar
\n\u8fd9\u79cd\u5546\u4e1a\u57df\u540d\u3002\u6b64\u65f6\u8fd9\u4e9b\u5de5\u5177\u5c31\u7531\u88ab\u52a8\u578b\u7f51\u7edc\u5de5\u5177\u53d8\u4e3a\u4e3b\u52a8\u578b\u7f51\u7edc\u5de5\u5177\u4e86\u3002\u800c\u4e0d\u76d1\u542c\u7f51
\n\u7edc\u901a\u8baf\u7684\u673a\u5668
\n\u4e0d\u4f1a\u8bd5\u56fe\u53cd\u5411\u89e3\u6790\u6570\u636e\u5305\u4e2d\u7684 IP\u5730\u5740\u3002\u4e3a\u4e86\u5229\u7528\u8fd9\u4e00\u70b9\uff0cAntiSniff Ver 1.x\u4f7f\u81ea\u8eab\u5904
\n\u4e8e\u6df7\u6742\u6a21\u5f0f\u4e0b\uff0c
\n\u5411\u7f51\u7edc\u53d1\u9001\u865a\u5047\u76ee\u6807IP\u5730\u5740\u7684\u6570\u636e\u5305\uff0c\u7136\u540e\u76d1\u542c\u662f\u5426\u6709\u673a\u5668\u53d1\u9001\u8be5\u865a\u5047\u76ee\u6807IP\u5730\u5740\u7684\u53cd
\n\u5411DNS\u67e5\u8be2\u3002
\n\u4f2a\u9020\u6570\u636e\u5305\u7684\u4ee5\u592a\u7f51\u5730\u5740\u3001\u68c0\u67e5\u76ee\u6807\u3001\u865a\u5047\u76ee\u6807IP\u5730\u5740\u53ef\u7531\u7528\u6237\u5b9a\u5236\u3002<\/p>\n

\u25c6 \u7f51\u7edc\u548c\u4e3b\u673a\u54cd\u5e94\u65f6\u95f4\u6d4b\u8bd5<\/p>\n

\u8fd9\u79cd\u6d4b\u8bd5\u5df2\u88ab\u8bc1\u660e\u662f\u6700\u6709\u6548\u7684\u3002\u5b83\u80fd\u591f\u53d1\u73b0\u7f51\u7edc\u4e2d\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u7684\u673a\u5668\uff0c\u800c\u4e0d\u7ba1\u5176\u64cd
\n\u4f5c\u7cfb\u7edf\u662f\u4ec0\u4e48\u3002
\n\u8b66\u544a\uff0c\u8fd9\u4e2a\u6d4b\u8bd5\u4f1a\u5728\u5f88\u77ed\u7684\u65f6\u95f4\u5185\u4ea7\u751f\u5de8\u5927\u7684\u7f51\u7edc\u901a\u8baf\u6d41\u91cf\u3002\u8fdb\u884c\u8fd9\u79cd\u6d4b\u8bd5\u7684\u7406\u7531\u662f\u4e0d
\n\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f
\n\u7684\u7f51\u5361\u63d0\u4f9b\u4e86\u4e00\u5b9a\u7684\u786c\u4ef6\u5e95\u5c42\u8fc7\u6ee4\u673a\u5236\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u76ee\u6807\u5730\u5740\u975e\u672c\u5730(\u5e7f\u64ad\u5730\u5740\u9664\u5916)\u7684
\n\u6570\u636e\u5305\u5c06\u88ab\u7f51\u5361
\n\u7684\u56fa\u4ef6\u4e22\u5f03\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9aa4\u7136\u589e\u52a0\u3001\u4f46\u76ee\u6807\u5730\u5740\u4e0d\u662f\u672c\u5730\u7684\u7f51\u7edc\u901a\u8baf\u6d41\u91cf\u5bf9\u64cd\u4f5c\u7cfb
\n\u7edf\u7684\u5f71\u54cd\u53ea\u4f1a
\n\u5f88\u5c0f\u3002\u800c\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u4e0b\u7684\u673a\u5668\u5219\u7f3a\u4e4f\u6b64\u7c7b\u5e95\u5c42\u7684\u8fc7\u6ee4\uff0c\u9aa4\u7136\u589e\u52a0\u3001\u4f46\u76ee\u6807\u5730\u5740\u4e0d\u662f\u672c
\n\u5730\u7684\u7f51\u7edc\u901a\u8baf
\n\u6d41\u91cf\u4f1a\u5bf9\u8be5\u673a\u5668\u9020\u6210\u8f83\u660e\u663e\u7684\u5f71\u54cd(\u4e0d\u540c\u7684\u64cd\u4f5c\u7cfb\u7edf\/\u5185\u6838\/\u7528\u6237\u65b9\u5f0f\u4f1a\u6709\u4e0d\u540c)\u3002\u8fd9\u4e9b\u53d8
\n\u5316\u53ef\u4ee5\u901a\u8fc7\u7f51
\n\u7edc\u901a\u8baf\u6d41\u91cf\u5de5\u5177\u76d1\u89c6\u5230\u3002<\/p>\n

\n\u6839\u636e\u4ee5\u4e0a\u8981\u70b9\uff0cAntiSniff Ver 1.x \u9996\u5148\u5229\u7528ICMP ECHO\u8bf7\u6c42\u53ca\u54cd\u5e94\u8ba1\u7b97\u51fa\u9700\u8981\u68c0\u6d4b
\n\u673a\u5668\u7684\u54cd\u5e94\u65f6\u95f4
\n\u57fa\u51c6\u548c\u5e73\u5747\u503c\u3002\u5728\u5f97\u5230\u8fd9\u4e2a\u6570\u636e\u540e\uff0c\u7acb\u523b\u5411\u672c\u5730\u7f51\u7edc\u53d1\u9001\u5927\u91cf\u7684\u4f2a\u9020\u6570\u636e\u5305\u3002\u4e0e\u6b64\u540c\u65f6
\n\u518d\u6b21\u53d1\u9001\u6d4b\u8bd5
\n\u6570\u636e\u5305\u4ee5\u786e\u5b9a\u5e73\u5747\u54cd\u5e94\u65f6\u95f4\u7684\u53d8\u5316\u503c\u3002\u975e\u6df7\u6742\u6a21\u5f0f\u7684\u673a\u5668\u7684\u54cd\u5e94\u65f6\u95f4\u53d8\u5316\u91cf\u4f1a\u5f88\u5c0f\uff0c\u800c
\n\u6df7\u6742\u6a21\u5f0f\u7684\u673a
\n\u5668\u7684\u54cd\u5e94\u65f6\u95f4\u53d8\u5316\u91cf\u5219\u901a\u5e38\u4f1a\u6709 1-4\u4e2a\u6570\u91cf\u7ea7\u3002\u4e3a\u4e86\u5bf9\u4ed8\u653b\u51fb\u8005\u548c\u5165\u4fb5\u8005\u4eec\u6700\u5e38\u7528\u7684\u591a
\n\u79cd\u5de5\u5177\uff0c
\nAntiSniff\u8fdb\u884c\u4e86\u4e09\u79cd\u7f51\u7edc\u9971\u548c\u5ea6\u6d4b\u8bd5\uff1aSIXTYSIX\u3001TCPSYN\u548cTHREEWAY\u3002<\/p>\n

* SIXTYSIX\u6d4b\u8bd5\u6784\u9020\u7684\u6570\u636e\u5305\u6570\u636e\u5168\u4e3a0x66\u3002\u8fd9\u4e9b\u6570\u636e\u5305\u4e0d\u4f1a\u88ab\u975e\u6df7\u6742\u6a21\u5f0f\u7684
\n\u673a\u5668\u63a5\u6536\uff0c\u540c\u65f6
\n\u65b9\u4fbf\u4f7f\u7528\u5e38\u89c1\u7684\u7f51\u7edc\u76d1\u542c\/\u5206\u6790\u5de5\u5177(\u5982tcpdump\u548csnoop\u7b49)\u8bb0\u5f55\u548c\u6355\u83b7\u3002<\/p>\n

* TCPSYN\u6d4b\u8bd5\u6784\u9020\u7684\u6570\u636e\u5305\u5305\u542b\u6709\u6548\u7684TCP\u5934\u548cIP\u5934\uff0c\u540c\u65f6TCP\u6807\u5fd7\u57df\u7684SYN\u4f4d\u88ab
\n\u8bbe\u7f6e\u3002<\/p>\n

* THREEWAY\u6d4b\u8bd5\u91c7\u53d6\u7684\u539f\u7406\u57fa\u672c\u4e0a\u4e0eTCPSYN\u4e00\u6837\uff0c\u4f46\u66f4\u590d\u6742\u4e9b\u3002\u5728\u8fd9\u79cd\u6d4b\u8bd5\u4e2d\u4e24
\n\u4e2a\u5b9e\u9645\u4e0d\u5b58\u5728
\n\u7684\u673a\u5668\u95f4\u591a\u6b21\u5efa\u7acb\u5b8c\u6574\u7684TCP\u4e09\u65b9\u63e1\u624b\u901a\u8baf\u3002\u5b83\u80fd\u591f\u66f4\u597d\u5730\u6b3a\u9a97\u90a3\u4e9b\u9a87\u5ba2\u5de5\u5177\u3002<\/p>\n

AntiSniff Ver 1.x \u4e2d\u80fd\u591f\u901a\u8fc7\u4ee5\u4e0a\u4e09\u79cd\u6570\u636e\u5305\u6d4b\u8bd5\u53d1\u73b0\u6b63\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u673a\u5668\u7684\u6d4b\u8bd5
\n\u65b9\u6cd5\u6700\u597d\u5468
\n\u671f\u6027\u5730\u8fdb\u884c\u548c\u4e0e\u4ee5\u524d\u7684\u6570\u636e\u6bd4\u8f83\u3002\u54cd\u5e94\u65f6\u95f4\u6d4b\u8bd5\u7b2c\u4e00\u6b21\u8fd0\u884c\u7684\u6570\u636e\u8fd8\u80fd\u591f\u7528\u4e8e\u5206\u6790\u4e00\u4e2a
\n\u5927\u578b\u7f51\u7edc\u5728
\nflooding\u548c\u975eflooding\u72b6\u6001\u65f6\u7684\u6027\u80fd\uff0c\u5e76\u5e2e\u52a9\u5de5\u7a0b\u5e08\u8c03\u6574\u7f51\u7edc\u6027\u80fd\u3002\u4e00\u65e6\u786e\u4fe1\u672c\u5730\u7f51\u7edc
\n\u5df2\u8fd0\u884c\u5728\u6b63
\n\u5e38(\u6ca1\u6709\u672a\u7ecf\u5141\u8bb8\u800c\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u7684\u673a\u5668) \u72b6\u6001\uff0c\u5c31\u5e94\u8be5\u8bbe\u7f6eAntiSniff\u5de5\u5177\u5468\u671f\u6027\u8fd0\u884c
\n\u3002\u53ea\u8981\u53d1\u73b0
\n\u67d0\u53f0\u673a\u5668\u6027\u80fd(\u54cd\u5e94\u65f6\u95f4)\u53d1\u751f\u6570\u91cf\u7ea7\u7684\u53d8\u5316\uff0c\u4e00\u822c\u5c31\u80fd\u786e\u5b9a\u5176\u6b63\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u3002\u8fd9\u79cd\u65b9
\n\u6cd5\u4e0d\u9700\u6bd4\u8f83
\n\u4e24\u53f0\u72ec\u7acb\u7cfb\u7edf\u95f4\u7684\u6027\u80fd\u6570\u636e\uff0c\u800c\u53ea\u9700\u6bd4\u8f83\u540c\u4e00\u53f0\u673a\u5668\u4e0d\u540c\u65f6\u5019\u7684\u6570\u636e\u5c31\u80fd\u786e\u5b9a\u8be5\u673a\u5668\u662f
\n\u5426\u5904\u4e8e\u6df7\u6742\u6a21\u5f0f\u3002\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\n\u4e00 \u524d\u8a00<\/p>\n

SNIFF\u771f\u662f\u4e00\u4e2a\u53e4\u8001\u7684\u8bdd\u9898\uff0c\u5173\u4e8e\u5728\u7f51\u7edc\u4e0a\u91c7\u7528SNIFF\u6765\u83b7\u53d6\u654f\u611f\u4fe1\u606f\u5df2\u7ecf\u4e0d\u662f\u4ec0\u4e48
\n\u65b0\u9c9c\u4e8b\uff0c\u4e5f\u4e0d\u4e4f\u5f88\u591a\u6210\u529f\u7684\u6848\u4f8b\uff0c\u90a3\u4e48\uff0cSNIFF\u7a76\u7adf\u662f\u4ec0\u4e48\u5462\uff1f SNIFF\u5c31\u662f\u55c5\u63a2\u5668\uff0c\u5c31\u662f
\n\u7a83\u542c\u5668\uff0cSNIFF\u9759\u6084\u6084\u7684\u5de5\u4f5c\u5728\u7f51\u7edc\u7684\u5e95\u5c42\uff0c\u628a\u4f60\u7684\u79d8\u5bc6\u5168\u90e8\u8bb0\u5f55\u4e0b\u6765\u3002\u770b\u8fc7\u5a01\u5c14\u53f2\u5bc6\u65af
\n\u6f14\u7684\u300a\u5168\u6c11\u516c\u654c\u300b\u5417\uff1fSNIFF\u5c31\u8c61\u91cc\u9762\u7cbe\u5de7\u7684\u7a83\u542c\u5668\u4e00\u6837\uff0c\u8ba9\u4f60\u9632\u4e0d\u80dc\u9632\u3002<\/p>\n

SNIFF\u53ef\u4ee5\u662f\u8f6f\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u662f\u786c\u4ef6\uff0c\u65e2\u7136\u662f\u8f6f\u4ef6\u90a3\u5c31\u8981\u5206\u5e73\u53f0…<\/p><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[324],"tags":[],"class_list":["post-37","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"\nC\u8bed\u8a00\u7f16\u7a0b\u6765\u4f7f\u7f51\u5361\u5de5\u4f5c\u5728\u6df7\u6742\u6a21\u5f0f - Wayne's Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/weizn.net\/?p=37\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u8bed\u8a00\u7f16\u7a0b\u6765\u4f7f\u7f51\u5361\u5de5\u4f5c\u5728\u6df7\u6742\u6a21\u5f0f - Wayne's Blog\" \/>\n<meta property=\"og:description\" content=\"\u4e00 \u524d\u8a00 SNIFF\u771f\u662f\u4e00\u4e2a\u53e4\u8001\u7684\u8bdd\u9898\uff0c\u5173\u4e8e\u5728\u7f51\u7edc\u4e0a\u91c7\u7528SNIFF\u6765\u83b7\u53d6\u654f\u611f\u4fe1\u606f\u5df2\u7ecf\u4e0d\u662f\u4ec0\u4e48 \u65b0\u9c9c\u4e8b\uff0c\u4e5f\u4e0d\u4e4f\u5f88\u591a\u6210\u529f\u7684\u6848\u4f8b\uff0c\u90a3\u4e48\uff0cSNIFF\u7a76\u7adf\u662f\u4ec0\u4e48\u5462\uff1f SNIFF\u5c31\u662f\u55c5\u63a2\u5668\uff0c\u5c31\u662f \u7a83\u542c\u5668\uff0cSNIFF\u9759\u6084\u6084\u7684\u5de5\u4f5c\u5728\u7f51\u7edc\u7684\u5e95\u5c42\uff0c\u628a\u4f60\u7684\u79d8\u5bc6\u5168\u90e8\u8bb0\u5f55\u4e0b\u6765\u3002\u770b\u8fc7\u5a01\u5c14\u53f2\u5bc6\u65af \u6f14\u7684\u300a\u5168\u6c11\u516c\u654c\u300b\u5417\uff1fSNIFF\u5c31\u8c61\u91cc\u9762\u7cbe\u5de7\u7684\u7a83\u542c\u5668\u4e00\u6837\uff0c\u8ba9\u4f60\u9632\u4e0d\u80dc\u9632\u3002 SNIFF\u53ef\u4ee5\u662f\u8f6f\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u662f\u786c\u4ef6\uff0c\u65e2\u7136\u662f\u8f6f\u4ef6\u90a3\u5c31\u8981\u5206\u5e73\u53f0...\" \/>\n<meta property=\"og:url\" content=\"http:\/\/weizn.net\/?p=37\" \/>\n<meta property=\"og:site_name\" content=\"Wayne's Blog\" \/>\n<meta property=\"article:published_time\" content=\"2013-09-13T15:47:07+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"zinan\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"http:\/\/weizn.net\/#website\",\"url\":\"http:\/\/weizn.net\/\",\"name\":\"Wayne's Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"http:\/\/weizn.net\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"WebPage\",\"@id\":\"http:\/\/weizn.net\/?p=37#webpage\",\"url\":\"http:\/\/weizn.net\/?p=37\",\"name\":\"C\\u8bed\\u8a00\\u7f16\\u7a0b\\u6765\\u4f7f\\u7f51\\u5361\\u5de5\\u4f5c\\u5728\\u6df7\\u6742\\u6a21\\u5f0f - Wayne's Blog\",\"isPartOf\":{\"@id\":\"http:\/\/weizn.net\/#website\"},\"datePublished\":\"2013-09-13T15:47:07+00:00\",\"dateModified\":\"2013-09-13T15:47:07+00:00\",\"breadcrumb\":{\"@id\":\"http:\/\/weizn.net\/?p=37#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"http:\/\/weizn.net\/?p=37\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"http:\/\/weizn.net\/?p=37#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\\u9996\\u9875\",\"item\":\"http:\/\/weizn.net\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"C\\u8bed\\u8a00\\u7f16\\u7a0b\\u6765\\u4f7f\\u7f51\\u5361\\u5de5\\u4f5c\\u5728\\u6df7\\u6742\\u6a21\\u5f0f\"}]},{\"@type\":\"Article\",\"@id\":\"http:\/\/weizn.net\/?p=37#article\",\"isPartOf\":{\"@id\":\"http:\/\/weizn.net\/?p=37#webpage\"},\"author\":{\"@id\":\"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264\"},\"headline\":\"C\\u8bed\\u8a00\\u7f16\\u7a0b\\u6765\\u4f7f\\u7f51\\u5361\\u5de5\\u4f5c\\u5728\\u6df7\\u6742\\u6a21\\u5f0f\",\"datePublished\":\"2013-09-13T15:47:07+00:00\",\"dateModified\":\"2013-09-13T15:47:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"http:\/\/weizn.net\/?p=37#webpage\"},\"wordCount\":1539,\"commentCount\":0,\"publisher\":{\"@id\":\"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264\"},\"articleSection\":[\"C\/C++\"],\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"http:\/\/weizn.net\/?p=37#respond\"]}]},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264\",\"name\":\"zinan\",\"logo\":{\"@id\":\"http:\/\/weizn.net\/#personlogo\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"C\u8bed\u8a00\u7f16\u7a0b\u6765\u4f7f\u7f51\u5361\u5de5\u4f5c\u5728\u6df7\u6742\u6a21\u5f0f - Wayne's Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"http:\/\/weizn.net\/?p=37","og_locale":"zh_CN","og_type":"article","og_title":"C\u8bed\u8a00\u7f16\u7a0b\u6765\u4f7f\u7f51\u5361\u5de5\u4f5c\u5728\u6df7\u6742\u6a21\u5f0f - Wayne's Blog","og_description":"\u4e00 \u524d\u8a00 SNIFF\u771f\u662f\u4e00\u4e2a\u53e4\u8001\u7684\u8bdd\u9898\uff0c\u5173\u4e8e\u5728\u7f51\u7edc\u4e0a\u91c7\u7528SNIFF\u6765\u83b7\u53d6\u654f\u611f\u4fe1\u606f\u5df2\u7ecf\u4e0d\u662f\u4ec0\u4e48 \u65b0\u9c9c\u4e8b\uff0c\u4e5f\u4e0d\u4e4f\u5f88\u591a\u6210\u529f\u7684\u6848\u4f8b\uff0c\u90a3\u4e48\uff0cSNIFF\u7a76\u7adf\u662f\u4ec0\u4e48\u5462\uff1f SNIFF\u5c31\u662f\u55c5\u63a2\u5668\uff0c\u5c31\u662f \u7a83\u542c\u5668\uff0cSNIFF\u9759\u6084\u6084\u7684\u5de5\u4f5c\u5728\u7f51\u7edc\u7684\u5e95\u5c42\uff0c\u628a\u4f60\u7684\u79d8\u5bc6\u5168\u90e8\u8bb0\u5f55\u4e0b\u6765\u3002\u770b\u8fc7\u5a01\u5c14\u53f2\u5bc6\u65af \u6f14\u7684\u300a\u5168\u6c11\u516c\u654c\u300b\u5417\uff1fSNIFF\u5c31\u8c61\u91cc\u9762\u7cbe\u5de7\u7684\u7a83\u542c\u5668\u4e00\u6837\uff0c\u8ba9\u4f60\u9632\u4e0d\u80dc\u9632\u3002 SNIFF\u53ef\u4ee5\u662f\u8f6f\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u662f\u786c\u4ef6\uff0c\u65e2\u7136\u662f\u8f6f\u4ef6\u90a3\u5c31\u8981\u5206\u5e73\u53f0...","og_url":"http:\/\/weizn.net\/?p=37","og_site_name":"Wayne's Blog","article_published_time":"2013-09-13T15:47:07+00:00","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"zinan","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"8 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebSite","@id":"http:\/\/weizn.net\/#website","url":"http:\/\/weizn.net\/","name":"Wayne's Blog","description":"","publisher":{"@id":"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"http:\/\/weizn.net\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"WebPage","@id":"http:\/\/weizn.net\/?p=37#webpage","url":"http:\/\/weizn.net\/?p=37","name":"C\u8bed\u8a00\u7f16\u7a0b\u6765\u4f7f\u7f51\u5361\u5de5\u4f5c\u5728\u6df7\u6742\u6a21\u5f0f - Wayne's Blog","isPartOf":{"@id":"http:\/\/weizn.net\/#website"},"datePublished":"2013-09-13T15:47:07+00:00","dateModified":"2013-09-13T15:47:07+00:00","breadcrumb":{"@id":"http:\/\/weizn.net\/?p=37#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["http:\/\/weizn.net\/?p=37"]}]},{"@type":"BreadcrumbList","@id":"http:\/\/weizn.net\/?p=37#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"http:\/\/weizn.net\/"},{"@type":"ListItem","position":2,"name":"C\u8bed\u8a00\u7f16\u7a0b\u6765\u4f7f\u7f51\u5361\u5de5\u4f5c\u5728\u6df7\u6742\u6a21\u5f0f"}]},{"@type":"Article","@id":"http:\/\/weizn.net\/?p=37#article","isPartOf":{"@id":"http:\/\/weizn.net\/?p=37#webpage"},"author":{"@id":"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264"},"headline":"C\u8bed\u8a00\u7f16\u7a0b\u6765\u4f7f\u7f51\u5361\u5de5\u4f5c\u5728\u6df7\u6742\u6a21\u5f0f","datePublished":"2013-09-13T15:47:07+00:00","dateModified":"2013-09-13T15:47:07+00:00","mainEntityOfPage":{"@id":"http:\/\/weizn.net\/?p=37#webpage"},"wordCount":1539,"commentCount":0,"publisher":{"@id":"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264"},"articleSection":["C\/C++"],"inLanguage":"zh-Hans","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["http:\/\/weizn.net\/?p=37#respond"]}]},{"@type":["Person","Organization"],"@id":"http:\/\/weizn.net\/#\/schema\/person\/e88bc12c590502d8b6249326f960b264","name":"zinan","logo":{"@id":"http:\/\/weizn.net\/#personlogo"}}]}},"_links":{"self":[{"href":"http:\/\/weizn.net\/index.php?rest_route=\/wp\/v2\/posts\/37","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/weizn.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/weizn.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/weizn.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/weizn.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=37"}],"version-history":[{"count":0,"href":"http:\/\/weizn.net\/index.php?rest_route=\/wp\/v2\/posts\/37\/revisions"}],"wp:attachment":[{"href":"http:\/\/weizn.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=37"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/weizn.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=37"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/weizn.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=37"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}