\u5728\u5354\u5b9a\u5c64\u9762\uff0cDDoS\u653b\u64ca\u901a\u5e38\u901a\u904e\u7279\u5b9a\u7570\u5e38\u986f\u73fe\u51fa\u4f86\u3002\u57fa\u65bcTCP\u7684\u653b\u64ca\u901a\u5e38\u8868\u73fe\u70ba\u7570\u5e38\u9ad8\u6578\u91cf\u7684\u534a\u958b\u9023\u63a5\uff0c\u800cUDP\u6cdb\u6d2a\u5247\u5275\u5efa\u672a\u5339\u914d\u8acb\u6c42\u5305\u7684\u7368\u7279\u6a21\u5f0f\u3002\u61c9\u7528\u5c64\u653b\u64ca\u53ef\u80fd\u8868\u73fe\u70ba\u7570\u5e38\u7684\u8acb\u6c42\u6642\u5e8f\u6a21\u5f0f\u6216\u4e0d\u5c0b\u5e38\u7684\u8cc7\u6e90\u5b58\u53d6\u5e8f\u5217\u3002<\/p>\n

\r\n# Example of monitoring TCP connection states\r\nnetstat -n | awk '\/^tcp\/ {++state[$NF]} END {for(key in state) print key,\"\\t\",state[key]}'\r\n<\/code><\/pre>\n
\u65e9\u671f\u9810\u8b66\u8a0a\u865f\u548c\u884c\u70ba\u6307\u6a19<\/strong><\/h2>\n
DDoS\u653b\u64ca\u7684\u65e9\u671f\u6aa2\u6e2c\u4e3b\u8981\u4f9d\u8cf4\u65bc\u8b58\u5225\u7db2\u8def\u884c\u70ba\u7684\u7d30\u5fae\u8b8a\u5316\u3002\u9019\u4e9b\u9810\u8b66\u8a0a\u865f\u901a\u5e38\u5728\u4e3b\u8981\u653b\u64ca\u767c\u751f\u524d\u6578\u5c0f\u6642\u751a\u81f3\u6578\u5929\u5c31\u6703\u51fa\u73fe\u3002\u95dc\u9375\u6307\u6a19\u5305\u62ecDNS\u67e5\u8a62\u4e2d\u7684\u7570\u5e38\u6a21\u5f0f\u3001\u7279\u5b9a\u985e\u578b\u5354\u5b9a\u8acb\u6c42\u7684\u610f\u5916\u589e\u52a0\uff0c\u4ee5\u53ca\u4e0d\u540c\u7db2\u6bb5\u9593\u6d41\u91cf\u5206\u4f48\u7684\u7570\u5e38\u8b8a\u5316\u3002<\/p>\n
\u4e00\u500b\u7279\u5225\u660e\u986f\u7684\u8de1\u8c61\u662f\u300c\u5075\u5bdf\u300d\u6d3b\u52d5\u7684\u5b58\u5728\uff0c\u653b\u64ca\u8005\u901a\u904e\u9019\u7a2e\u6d3b\u52d5\u63a2\u6e2c\u7db2\u8def\u57fa\u790e\u8a2d\u65bd\u4ee5\u8b58\u5225\u6f0f\u6d1e\u3002\u9019\u53ef\u80fd\u8868\u73fe\u70ba\u4f86\u81ea\u591a\u500b\u6e90\u7684\u96f6\u661f\u9023\u63a5\u5617\u8a66\u6216\u7570\u5e38\u7684\u57e0\u53e3\u6383\u63cf\u6a21\u5f0f\u3002<\/p>\n
\u6d41\u91cf\u5206\u6790\u548c\u6a21\u5f0f\u8b58\u5225<\/strong><\/h2>\n
\u9ad8\u7d1a\u6d41\u91cf\u5206\u6790\u63ed\u793a\u4e86DDoS\u653b\u64ca\u7684\u5e7e\u500b\u7368\u7279\u6a21\u5f0f\uff0c\u5305\u62ec\uff1a<\/p>\n\n\n\n\n\n\n\n\n
\u7dad\u5ea6<\/th>\n
\u95dc\u9375\u6307\u6a19<\/th>\n<\/tr>\n<\/thead>\n
\u6642\u9593<\/strong><\/td>\n
\u8cc7\u6599\u5305\u5230\u9054\u548c\u8acb\u6c42\u5e8f\u5217\u7684\u7570\u5e38\u6642\u5e8f<\/td>\n<\/tr>\n
\u7a7a\u9593<\/strong><\/td>\n
\u6e90IP\u4f4d\u5740\u548c\u5730\u7406\u4f86\u6e90\u7684\u7570\u5e38\u5206\u4f48<\/td>\n<\/tr>\n
\u5354\u5b9a<\/strong><\/td>\n
\u9810\u671f\u5354\u5b9a\u884c\u70ba\u548c\u72c0\u614b\u8f49\u63db\u7684\u504f\u5dee<\/td>\n<\/tr>\n
\u8f09\u8377<\/strong><\/td>\n
\u7570\u5e38\u7684\u5167\u5bb9\u7279\u5fb5\u548c\u8acb\u6c42\u7d50\u69cb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u57fa\u65bc\u6a5f\u5668\u5b78\u7fd2\u7684\u6aa2\u6e2c\u8a0a\u865f<\/strong><\/h2>\n
\u73fe\u4ee3DDoS\u6aa2\u6e2c\u7cfb\u7d71\u63a1\u7528\u8907\u96dc\u7684\u6a5f\u5668\u5b78\u7fd2\u6f14\u7b97\u6cd5\u4f86\u8b58\u5225\u653b\u64ca\u7279\u5fb5\u3002\u9019\u4e9b\u7cfb\u7d71\u540c\u6642\u5206\u6790\u591a\u500b\u6d41\u91cf\u7279\u5fb5\uff0c\u5305\u62ec\u8cc7\u6599\u5305\u6a19\u982d\u8cc7\u8a0a\u3001\u8f09\u8377\u5167\u5bb9\u548c\u8cc7\u6599\u5305\u4e4b\u9593\u7684\u6642\u9593\u95dc\u4fc2\u3002\u901a\u904e\u5efa\u7acb\u57fa\u6e96\u884c\u70ba\uff0c\u9019\u4e9b\u7cfb\u7d71\u53ef\u4ee5\u6aa2\u6e2c\u5230\u53ef\u80fd\u9810\u793a\u5373\u5c07\u767c\u751f\u653b\u64ca\u7684\u7d30\u5fae\u7570\u5e38\u3002<\/p>\n\n\n\n\n\n\n\n\n
\u6a5f\u5668\u5b78\u7fd2\u6307\u6a19<\/th>\n
\u6aa2\u6e2c\u91cd\u9ede<\/th>\n<\/tr>\n<\/thead>\n
\u6d41\u91cf\u9ad4\u7a4d<\/strong><\/td>\n
\u504f\u96e2\u6b77\u53f2\u6a19\u6e96\u7684\u6d41\u91cf\u7a81\u8b8a<\/td>\n<\/tr>\n
\u5354\u5b9a\u5206\u6790<\/strong><\/td>\n
\u7570\u5e38\u7684\u5354\u5b9a\u4f7f\u7528\u548c\u8cc7\u6599\u5305\u5e8f\u5217\u884c\u70ba<\/td>\n<\/tr>\n
\u8acb\u6c42\u5c6c\u6027<\/strong><\/td>\n
\u8acb\u6c42\u6642\u9593\u3001\u5927\u5c0f\u548c\u5167\u5bb9\u7d50\u69cb\u7684\u504f\u5dee<\/td>\n<\/tr>\n
\u4f86\u6e90\u5206\u4f48<\/strong><\/td>\n
\u6e90\u4f4d\u5740\u5206\u914d\u548c\u5730\u7406\u4f86\u6e90\u7684\u610f\u5916\u8b8a\u5316<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u6d41\u91cf\u5206\u6790\u548c\u57fa\u6e96\u504f\u5dee<\/strong><\/h2>\n
\u5efa\u7acb\u6e96\u78ba\u7684\u6d41\u91cf\u57fa\u6e96\u5c0d\u65bc\u6aa2\u6e2cDDoS\u653b\u64ca\u81f3\u95dc\u91cd\u8981\u3002\u9019\u5305\u62ec\u76e3\u63a7\u4e0d\u540c\u6642\u9593\u6bb5\u7684\u6b63\u5e38\u6d41\u91cf\u6a21\u5f0f\u4e26\u7406\u89e3\u5b63\u7bc0\u6027\u8b8a\u5316\u3002\u8207\u9019\u4e9b\u57fa\u6e96\u7684\u986f\u8457\u504f\u5dee\u901a\u5e38\u8868\u660e\u6f5b\u5728\u7684\u653b\u64ca\u6d3b\u52d5\u3002\u95dc\u9375\u6307\u6a19\u5305\u62ec\uff1a<\/p>\n
\n
\u4e0d\u540c\u5354\u5b9a\u7684\u6bcf\u79d2\u8cc7\u6599\u5305(pps)\u901f\u7387<\/li>\n
\u983b\u5bec\u5229\u7528\u6a21\u5f0f<\/li>\n
\u9023\u63a5\u8acb\u6c42\u901f\u7387<\/li>\n
\u5354\u5b9a\u5206\u4f48\u6bd4\u7387<\/li>\n<\/ul>\n
\r\n# Monitor bandwidth utilization\r\niftop -i eth0 -N -P\r\n\r\n# Track packet rates\r\ntcpdump -i eth0 -n tcp | wc -l\r\n<\/code><\/pre>\n
\u61c9\u7528\u5c64\u653b\u64ca\u7279\u5fb5<\/strong><\/h2>\n
\u61c9\u7528\u5c64DDoS\u653b\u64ca\u901a\u5e38\u66f4\u52a0\u96b1\u853d\u548c\u8907\u96dc\u3002\u96d6\u7136\u9019\u4e9b\u653b\u64ca\u8a66\u5716\u6a21\u4eff\u5408\u6cd5\u7528\u6236\u884c\u70ba\uff0c\u4f46\u4ed4\u7d30\u89c0\u5bdf\u53ef\u4ee5\u767c\u73fe\u95dc\u9375\u7684\u5340\u5225\u7279\u5fb5\uff1a<\/p>\n
\u6703\u8a71\u884c\u70ba\u7570\u5e38\uff1a\u6b63\u5e38\u7528\u6236\u6703\u8a71\u901a\u5e38\u5305\u542b\u591a\u6a23\u7684\u9801\u9762\u5b58\u53d6\u6a21\u5f0f\uff0c\u800c\u653b\u64ca\u6d41\u91cf\u901a\u5e38\u986f\u793a\u6a5f\u68b0\u5316\u7684\u5b58\u53d6\u5e8f\u5217\u3002\u4f8b\u5982\uff0c\u771f\u5be6\u7528\u6236\u8868\u73fe\u51fa\u4e0d\u540c\u7684\u700f\u89bd\u6642\u9593\u548c\u9ede\u64ca\u9593\u9694\uff0c\u800c\u653b\u64ca\u6d41\u91cf\u901a\u5e38\u986f\u793a\u9ad8\u5ea6\u898f\u5f8b\u7684\u6642\u9593\u6a21\u5f0f\u3002<\/p>\n
\u8cc7\u6e90\u8acb\u6c42\u6a21\u5f0f\uff1a\u653b\u64ca\u8005\u50be\u5411\u65bc\u91cd\u8907\u8acb\u6c42\u76f8\u540c\u6216\u8a08\u7b97\u5bc6\u96c6\u578b\u8cc7\u6e90\u3002\u4e3b\u8981\u8b66\u544a\u8a0a\u865f\u5305\u62ec\uff1a<\/p>\n
\n
\u7279\u5b9aAPI\u7aef\u9ede\u7684\u9ad8\u983b\u5b58\u53d6<\/li>\n
\u91cd\u8907\u63d0\u4ea4\u76f8\u540c\u7684\u8cc7\u6599\u5eab\u67e5\u8a62<\/li>\n
\u983b\u7e41\u8acb\u6c42\u5927\u6a94\u6848\u4e0b\u8f09<\/li>\n
\u7570\u5e38\u7684\u4e26\u767c\u9023\u63a5\u6a21\u5f0f<\/li>\n<\/ul>\n
\u9ad8\u7d1a\u9810\u8b66\u7cfb\u7d71\u7684\u5be6\u65bd<\/strong><\/h2>\n
\u6709\u6548\u7684DDoS\u9810\u8b66\u7cfb\u7d71\u9700\u8981\u591a\u7dad\u8cc7\u6599\u5206\u6790\u3002\u5be6\u8e10\u4e2d\uff0c\u6211\u5011\u767c\u73fe\u7d50\u5408\u4ee5\u4e0b\u65b9\u6cd5\u53ef\u986f\u8457\u63d0\u9ad8\u6aa2\u6e2c\u6e96\u78ba\u6027\uff1a<\/p>\n
1. \u7db2\u8def\u884c\u70ba\u57fa\u6e96\u5206\u6790<\/h3>\n
\u5efa\u7acb\u7db2\u8def\u884c\u70ba\u57fa\u6e96\u9700\u8981\u6536\u96c6\u81f3\u5c1130\u5929\u7684\u6b63\u5e38\u6d41\u91cf\u8cc7\u6599\uff0c\u91cd\u9ede\u95dc\u6ce8\uff1a<\/p>\n
\n
\u65e5\u5e38\u6d41\u91cf\u9ad8\u5cf0\u548c\u4f4e\u8c37\u6a21\u5f0f<\/li>\n
\u4e0d\u540c\u6642\u9593\u6bb5\u7684\u983b\u5bec\u4f7f\u7528\u7279\u5fb5<\/li>\n
\u5354\u5b9a\u4f7f\u7528\u6bd4\u7387<\/li>\n
\u5e38\u898b\u5ba2\u6236\u7aef\u7684\u5b58\u53d6\u6a21\u5f0f<\/li>\n<\/ul>\n
2. \u7570\u5e38\u6aa2\u6e2c\u6a5f\u5236<\/h3>\n
\u6709\u6548\u7684\u7570\u5e38\u6aa2\u6e2c\u9700\u8981\u5efa\u7acb\u591a\u5c64\u6aa2\u6e2c\u6a19\u6e96\u3002\u4f8b\u5982\uff0c\u5c0d\u65bcHTTP\u6d41\u91cf\uff0c\u6211\u5011\u9700\u8981\u540c\u6642\u76e3\u63a7\uff1a<\/p>\n
\n
\u8acb\u6c42\u983b\u7387\uff1a\u55ae\u500bIP\u7684\u8acb\u6c42\u7387\u7a81\u7136\u8b8a\u5316<\/li>\n
\u6703\u8a71\u7279\u5fb5\uff1a\u7570\u5e38\u7684\u6703\u8a71\u6301\u7e8c\u6642\u9593\u6a21\u5f0f<\/li>\n
\u8cc7\u6e90\u6d88\u8017\uff1a\u4f3a\u670d\u5668CPU\u548c\u8a18\u61b6\u9ad4\u4f7f\u7528\u7684\u7a81\u7136\u8b8a\u5316<\/li>\n
\u932f\u8aa4\u7387\uff1aHTTP 4xx\/5xx\u56de\u61c9\u78bc\u6bd4\u7387\u7684\u8b8a\u5316<\/li>\n<\/ul>\n
\u9810\u8b66\u8a0a\u865f\u7684\u95dc\u806f\u5206\u6790<\/strong><\/h2>\n
\u55ae\u7dad\u5ea6\u7570\u5e38\u53ef\u80fd\u7522\u751f\u8aa4\u5831\uff0c\u56e0\u6b64\u9700\u8981\u5efa\u7acb\u8a0a\u865f\u95dc\u806f\u5206\u6790\u7cfb\u7d71\uff1a<\/p>\n
1. \u6642\u9593\u95dc\u806f<\/h3>\n
\u89c0\u5bdf\u4e0d\u540c\u7570\u5e38\u8a0a\u865f\u4e4b\u9593\u7684\u6642\u9593\u95dc\u4fc2\u3002\u4f8b\u5982\uff0cTCP SYN\u8a08\u6578\u7684\u589e\u52a0\u901a\u5e38\u5148\u65bcHTTP\u8acb\u6c42\u91cf\u7a81\u589e\u3002\u4e3b\u8981\u89c0\u5bdf\u9ede\u5305\u62ec\uff1a<\/p>\n
\n
DNS\u67e5\u8a62\u91cf\u8b8a\u5316\u8207HTTP\u8acb\u6c42\u91cf\u8b8a\u5316\u4e4b\u9593\u7684\u6642\u9593\u95dc\u4fc2<\/li>\n
\u7db2\u8def\u5c64\u7570\u5e38\u8207\u61c9\u7528\u5c64\u7570\u5e38\u7684\u5e8f\u5217<\/li>\n
\u6d41\u91cf\u7570\u5e38\u5728\u4e0d\u540c\u5730\u7406\u4f4d\u7f6e\u9593\u7684\u50b3\u64ad\u6a21\u5f0f<\/li>\n<\/ul>\n
2. \u7a7a\u9593\u95dc\u806f<\/h3>\n
\u5206\u6790\u7570\u5e38\u4e8b\u4ef6\u5728\u4e0d\u540c\u7db2\u8def\u5340\u57df\u7684\u5206\u4f48\u7279\u5fb5\u3002\u8907\u96dc\u7684\u653b\u64ca\u5f88\u5c11\u91dd\u5c0d\u55ae\u4e00\u9ede\uff0c\u901a\u5e38\u8868\u73fe\u70ba\uff1a<\/p>\n
\n
\u985e\u4f3c\u7570\u5e38\u540c\u6642\u51fa\u73fe\u5728\u591a\u500b\u5b50\u7db2<\/li>\n
\u653b\u64ca\u6e90IP\u4f4d\u5740\u986f\u793a\u7279\u5b9a\u7684\u5730\u7406\u5206\u4f48\u6a21\u5f0f<\/li>\n
\u8ca0\u8f09\u5e73\u8861\u96c6\u7fa4\u4e2d\u7684\u7570\u5e38\u8ca0\u8f09\u5206\u4f48<\/li>\n<\/ul>\n
\u901a\u904e\u9019\u4e9b\u6df1\u5165\u5206\u6790\u548c\u591a\u7dad\u76e3\u63a7\uff0c\u6211\u5011\u53ef\u4ee5\u5728DDoS\u653b\u64ca\u9020\u6210\u5be6\u8cea\u6027\u640d\u5bb3\u4e4b\u524d\u8b58\u5225\u6f5b\u5728\u5a01\u8105\uff0c\u7372\u5f97\u5bf6\u8cb4\u7684\u56de\u61c9\u6642\u9593\u3002\u6b64\u985e\u9810\u8b66\u6a5f\u5236\u7684\u6210\u529f\u4f9d\u8cf4\u65bc\u6301\u7e8c\u7684\u7cfb\u7d71\u512a\u5316\u548c\u7d93\u9a57\u7a4d\u7d2f\uff0c\u8981\u6c42\u5b89\u5168\u5718\u968a\u4e0d\u65b7\u66f4\u65b0\u548c\u6539\u9032\u6aa2\u6e2c\u7b56\u7565\u3002<\/p>\n
[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
[vc_row][vc_column][vc_column_text css=””]  […]<\/p>\n
Read More…<\/a><\/p>\n","protected":false},"author":2,"featured_media":19144,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[4740,4742,4741,1759,578],"class_list":["post-19149","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hong-kong-dedicated-server-tc","tag-traffic-patterns-tc","tag-hosting-protection-tc","tag-attack-detection-tc","tag-ddos-attacks-tc","tag-network-security-tc"],"acf":[],"yoast_head":"\n