{"id":59,"date":"2009-06-30T09:18:36","date_gmt":"2009-06-30T09:18:36","guid":{"rendered":""},"modified":"2011-11-18T16:56:31","modified_gmt":"2011-11-18T08:56:31","slug":"59","status":"publish","type":"post","link":"http:\/\/zerobox.org\/notes\/59.html","title":{"rendered":"Linux\u4e0b\u7684IDS\u5165\u4fb5\u68c0\u6d4b\u5de5\u5177"},"content":{"rendered":"

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IDS\u65b0\u5ba0\uff1aPSAD<\/strong><\/p>\n

Psad\u662f\u7aef\u53e3\u626b\u63cf\u653b\u51fb\u68c0\u6d4b\u7a0b\u5e8f\u7684\u7b80\u79f0\uff0c\u5b83\u4f5c\u4e3a\u4e00\u4e2a\u65b0\u5de5\u5177\uff0c\u53ef\u4ee5\u4e0eiptables\u548cSnort\u7b49\u7d27\u5bc6\u5408\u4f5c\uff0c\u5411\u6211\u4eec\u5c55\u793a\u6240\u6709\u8bd5\u56fe\u8fdb\u5165\u7f51\u7edc\u7684\u6076\u610f\u4f01\u56fe\u3002\u8fd9\u662f\u7b14\u8005\u9996\u9009\u7684Linux\u5165\u4fb5\u68c0\u6d4b\u7cfb\u7edf\u3002\u5b83\u4f7f\u7528\u4e86\u8bb8\u591asnort\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u4e0efwsnort\u548ciptables\u7684\u65e5\u5fd7\u7ed3\u5408\u4f7f\u7528\uff0c\u610f\u5473\u7740\u4f60\u751a\u81f3\u53ef\u4ee5\u6df1\u5165\u5230\u5e94\u7528\u5c42\u5e76\u6267\u884c\u4e00\u4e9b\u5185\u5bb9\u5206\u6790\u3002\u5b83\u53ef\u4ee5\u50cfNmap\u4e00\u6837\u6267\u884c\u6570\u636e\u5305\u5934\u90e8\u7684\u5206\u6790\uff0c\u5411\u7528\u6237\u53d1\u51fa\u8b66\u544a\uff0c\u751a\u81f3\u53ef\u4ee5\u5bf9\u5176\u8fdb\u884c\u914d\u7f6e\u4ee5\u4fbf\u4e8e\u81ea\u52a8\u963b\u6b62\u53ef\u7591\u7684IP\u5730\u5740\u3002<\/p>\n

\u4e8b\u5b9e\u4e0a\uff0c\u4efb\u4f55\u5165\u4fb5\u68c0\u6d4b\u7cfb\u7edf\u7684\u4e00\u4e2a\u5173\u952e\u65b9\u9762\u662f\u6355\u83b7\u5e76\u5206\u6790\u5927\u91cf\u7684\u6570\u636e\u3002\u5982\u679c\u4e0d\u8fd9\u6837\u505a\uff0c\u90a3\u53ea\u80fd\u662f\u76f2\u76ee\u4e71\u6765\uff0c\u5e76\u4e0d\u80fd\u771f\u6b63\u6709\u6548\u5730\u8c03\u6574IDS\u3002\u6211\u4eec\u53ef\u4ee5\u5c06PSAD\u7684\u6570\u636e\u5bfc\u51fa\u5230AfterGlow \u548c Gnuplot\u4e2d\uff0c\u4ece\u800c\u53ef\u4ee5\u77e5\u9053\u5230\u5e95\u662f\u8c01\u6b63\u5728\u653b\u51fb\u9632\u706b\u5899\uff0c\u800c\u4e14\u662f\u4ee5\u4e00\u79cd\u5f88\u53cb\u597d\u7684\u754c\u9762\u5c55\u793a\u3002<\/p>\n

\u8001\u5f53\u76ca\u58ee\uff1aSnort<\/strong><\/p>\n

\u6b63\u5982\u4e00\u4f4d\u53ef\u4fe1\u4efb\u7684\u8001\u4eba\uff0c\u968f\u7740\u5e74\u9f84\u7684\u589e\u957f\uff0cSnort\u4e5f\u6108\u53d1\u6210\u719f\u3002\u5b83\u662f\u4e00\u6b3e\u8f7b\u91cf\u7ea7\u4e14\u6613\u4e8e\u4f7f\u7528\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u72ec\u7acb\u8fd0\u884c\uff0c\u4e5f\u53ef\u4ee5\u4e0epsad\u548ciptables\u4e00\u8d77\u4f7f\u7528\u3002\u6211\u4eec\u53ef\u4ee5\u4eceLinux\u7684\u53d1\u884c\u7248\u672c\u7684\u7a0b\u5e8f\u5e93\u4e2d\u627e\u5230\u5e76\u5b89\u88c5\u5b83\uff0c\u6bd4\u8d77\u8fc7\u53bb\u7684\u6e90\u4ee3\u7801\u5b89\u88c5\u8fd9\u5e94\u8be5\u662f\u4e00\u4e2a\u5f88\u5927\u7684\u8fdb\u6b65\u3002\u81f3\u4e8e\u4fdd\u6301\u5176\u89c4\u5219\u7684\u66f4\u65b0\u95ee\u9898\uff0c\u4e5f\u662f\u540c\u6837\u7684\u7b80\u5355\uff0c\u56e0\u4e3a\u4f5c\u4e3aSnort\u7684\u89c4\u5219\u66f4\u65b0\u7a0b\u5e8f\u548c\u7ba1\u7406\u7a0b\u5e8f\uff0coinkmaster\u4e5f\u5728Linux\u53d1\u884c\u7248\u672c\u7684\u7a0b\u5e8f\u5e93\u4e2d\u3002 Snort\u6613\u4e8e\u7ba1\u7406\uff0c\u867d\u7136\u5b83\u6709\u4e00\u4e9b\u914d\u7f6e\u4e0a\u7684\u8981\u6c42\u3002\u8981\u5f00\u59cb\u4f7f\u7528\u5b83\uff0c\u9ed8\u8ba4\u7684\u914d\u7f6e\u5bf9\u5927\u591a\u6570\u7f51\u7edc\u7cfb\u7edf\u5e76\u4e0d\u9002\u7528\uff0c\u56e0\u4e3a\u5b83\u5c06\u6240\u6709\u4e0d\u9700\u8981\u7684\u89c4\u5219\u4e5f\u5305\u62ec\u5728\u5176\u4e2d\u3002\u6240\u4ee5\u6211\u4eec\u8981\u505a\u7684\u7b2c\u4e00\u4ef6\u4e8b\u60c5\u662f\u6e05\u9664\u6240\u6709\u4e0d\u9700\u8981\u7684\u89c4\u5219\uff0c\u5426\u5219\u5c31\u4f1a\u635f\u5bb3\u6027\u80fd\uff0c\u5e76\u4f1a\u751f\u6210\u4e00\u4e9b\u865a\u5047\u7684\u8b66\u544a\u3002<\/p>\n

\u53e6\u5916\u4e00\u4e2a\u91cd\u8981\u7684\u7b56\u7565\u662f\u8981\u4ee5\u79d8\u5bc6\u6a21\u5f0f\u8fd0\u884cSnort\uff0c\u4e5f\u5c31\u662f\u8bf4\u8981\u76d1\u542c\u4e00\u4e2a\u6ca1\u6709IP\u5730\u5740\u7684\u7f51\u7edc\u63a5\u53e3\u3002\u5728\u6ca1\u6709\u4e3a\u5b83\u5206\u914dIP\u5730\u5740\u7684\u63a5\u53e3\u4e0a\uff0c\u5982ifconfig eth0 up\uff0c\u4ee5-i\u9009\u9879\u6765\u8fd0\u884cSnort\uff0c\u5982snort \u2013i eth0\u3002\u8fd8\u6709\u53ef\u80fd\u53d1\u751f\u8fd9\u6837\u7684\u4e8b\u60c5\uff1a\u5982\u679c\u4f60\u7684\u7f51\u7edc\u7ba1\u7406\u7a0b\u5e8f\u6b63\u8fd0\u884c\u5728\u7cfb\u7edf\u4e2d\uff0c\u90a3\u5b83\u5c31\u4f1a\u201c\u6709\u52a9\u4e8e\u201d\u5c55\u73b0\u51fa\u8fd8\u6ca1\u6709\u914d\u7f6e\u7684\u7aef\u53e3\uff0c\u56e0\u6b64\u5efa\u8bae\u8fd8\u662f\u6e05\u9664\u7f51\u7edc\u7ba1\u7406\u7a0b\u5e8f\u3002<\/p>\n

Snort\u53ef\u4ee5\u6536\u96c6\u5927\u91cf\u7684\u6570\u636e\uff0c\u56e0\u6b64\u9700\u8981\u6dfb\u52a0BASE(\u57fa\u672c\u5206\u6790\u548c\u5b89\u5168\u5f15\u64ce)\uff0c\u4ee5\u4fbf\u4e8e\u83b7\u5f97\u4e00\u4e2a\u53cb\u597d\u7684\u53ef\u89c6\u5316\u7684\u5206\u6790\u5de5\u5177\uff0c\u5b83\u4ee5\u8f83\u8001\u7684ACID(\u5165\u4fb5\u6570\u636e\u5e93\u5206\u6790\u63a7\u5236\u53f0)\u4e3a\u57fa\u7840\u3002<\/p>\n

\u7b80\u6d01\u65b9\u4fbf\uff1achkrootkit\u548crootkit<\/strong><\/p>\n

Rootkit\u68c0\u6d4b\u7a0b\u5e8fchkrootkit\u548crootkit Hunter\u4e5f\u7b97\u662f\u8001\u724c\u7684rootkit\u68c0\u6d4b\u7a0b\u5e8f\u4e86\u3002\u5f88\u660e\u663e\uff0c\u5728\u4ece\u4e00\u4e2a\u4e0d\u53ef\u5199\u7684\u5916\u90e8\u8bbe\u5907\u8fd0\u884c\u65f6\uff0c\u5b83\u4eec\u662f\u66f4\u53ef\u4fe1\u4efb\u7684\u5de5\u5177\uff0c\u5982\u4ece\u4e00\u4e2aCD\u6216\u5199\u4fdd\u62a4\u7684USB\u9a71\u52a8\u5668\u4e0a\u8fd0\u884c\u65f6\u5c31\u662f\u8fd9\u6837\u3002\u7b14\u8005\u559c\u6b22SD\u5361\uff0c\u5c31\u662f\u56e0\u4e3a\u90a3\u4e2a\u5199\u4fdd\u62a4\u7684\u7684\u5f00\u5173\u3002\u8fd9\u4e24\u4e2a\u7a0b\u5e8f\u53ef\u4ee5\u641c\u7d22\u5df2\u77e5\u7684rooktkit\u3001\u540e\u95e8\u548c\u672c\u5730\u7684\u6f0f\u6d1e\u5229\u7528\u7a0b\u5e8f\uff0c\u5e76\u4e14\u53ef\u4ee5\u53d1\u73b0\u6709\u9650\u7684\u4e00\u4e9b\u53ef\u7591\u6d3b\u52a8\u3002\u6211\u4eec\u9700\u8981\u8fd0\u884c\u8fd9\u4e9b\u5de5\u5177\u7684\u7406\u7531\u5728\u4e8e\uff0c\u5b83\u4eec\u53ef\u4ee5\u67e5\u770b\u6587\u4ef6\u7cfb\u7edf\u4e0a\u7684\/proc\u3001ps\u548c\u5176\u5b83\u7684\u4e00\u4e9b\u91cd\u8981\u7684\u6d3b\u52a8\u3002\u867d\u7136\u5b83\u4eec\u4e0d\u662f\u7528\u4e8e\u7f51\u7edc\u7684\uff0c\u4f46\u5374\u53ef\u4ee5\u5feb\u901f\u626b\u63cf\u4e2a\u4eba\u8ba1\u7b97\u673a\u3002<\/p>\n

\u591a\u9762\u624b\uff1aTripwire<\/strong><\/p>\n

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