{"id":33672,"date":"2026-10-20T14:00:00","date_gmt":"2026-10-20T06:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=33672"},"modified":"2026-10-20T21:29:19","modified_gmt":"2026-10-20T13:29:19","slug":"ddos-emergency-response-smb","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/guides\/ddos-emergency-response-smb\/","title":{"rendered":"\u7f51\u7ad9\u88ab DDoS \u653b\u51fb\u4e86\u600e\u4e48\u529e\uff1f\u4e2d\u5c0f\u4f01\u4e1a\u5e94\u6025\u54cd\u5e94\u6d41\u7a0b"},"content":{"rendered":"

\"\u7f51\u7ad9\u88ab<\/p>\n

\u65e9\u4e0a\u4e5d\u70b9\uff0c\u5ba2\u670d\u7fa4\u7a81\u7136\u70b8\u4e86\uff1a\u5ba2\u6237\u8bf4\u7f51\u7ad9\u6253\u4e0d\u5f00\uff0c\u4f60\u81ea\u5df1\u5237\u65b0\u9875\u9762\u8f6c\u4e86\u534a\u5206\u949f\u6700\u540e\u8d85\u65f6\uff0c\u767b\u5f55\u670d\u52a1\u5668\u4e00\u770b\u5e26\u5bbd\uff08\u670d\u52a1\u5668\u7684\u7f51\u7edc\u6570\u636e\u4f20\u8f93\u80fd\u529b\uff09\u6d41\u91cf\u56fe\u76f4\u63a5\u9876\u5230\u4e0a\u9650\u3002\u8fd9\u5c31\u662f\u5178\u578b\u7684 DDoS\uff08\u5206\u5e03\u5f0f\u62d2\u7edd\u670d\u52a1\u653b\u51fb\uff09\u573a\u666f\u2014\u2014\u653b\u51fb\u8005\u7528\u6d77\u91cf\u65e0\u6548\u8bf7\u6c42\u628a\u4f60\u7684\u5e26\u5bbd\u3001\u8fde\u63a5\u6570\u6216\u8ba1\u7b97\u8d44\u6e90\u8017\u5c3d\uff0c\u8ba9\u6b63\u5e38\u7528\u6237\u8fdb\u4e0d\u6765\u3002\u5bf9\u6ca1\u6709\u4e13\u804c\u5b89\u5168\u56e2\u961f\u7684\u4e2d\u5c0f\u4f01\u4e1a\u6765\u8bf4\uff0c\u6700\u7f3a\u7684\u4e0d\u662f\u9632\u62a4\u7406\u8bba\uff0c\u800c\u662f\u4e00\u5957\u62ff\u5230\u5c31\u80fd\u7528\u7684\u5e94\u6025\u54cd\u5e94\u6d41\u7a0b\u3002\u8fd9\u7bc7\u6587\u7ae0\u4f1a\u6559\u4f60\u4ece\u786e\u8ba4\u653b\u51fb\u3001\u7d27\u6025\u6b62\u635f\u3001\u6062\u590d\u4e1a\u52a1\u5230\u957f\u671f\u52a0\u56fa\u7684\u5b8c\u6574\u6b65\u9aa4\uff0c\u5e2e\u52a9\u4f60\u628a\u505c\u673a\u65f6\u95f4\u538b\u5230\u6700\u77ed\uff0c\u5927\u90e8\u5206\u64cd\u4f5c\u53ef\u4ee5\u5728 30 \u5206\u949f\u5185\u843d\u5730\u3002<\/p>\n

\u7b2c\u4e00\u6b65\uff1a\u5148\u786e\u8ba4\u662f\u4e0d\u662f DDoS \u653b\u51fb<\/h2>\n

\u6253\u5f00\u7f51\u7ad9\u6162\u6216\u8005\u6253\u4e0d\u5f00\uff0c\u539f\u56e0\u5f88\u591a\uff1a\u670d\u52a1\u5668\u5b95\u673a\u3001\u6570\u636e\u5e93\u9501\u6b7b\u3001\u8bc1\u4e66\u8fc7\u671f\u3001 CDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u914d\u7f6e\u9519\u8bef\u90fd\u53ef\u80fd\u9020\u6210\u7c7b\u4f3c\u73b0\u8c61\u3002\u5148\u82b1 5 \u5206\u949f\u786e\u8ba4\u653b\u51fb\u7c7b\u578b\uff0c\u540e\u9762\u7684\u52a8\u4f5c\u624d\u4e0d\u4f1a\u8dd1\u504f\u3002<\/p>\n

\u767b\u5f55\u670d\u52a1\u5668\u540e\uff0c\u6309\u987a\u5e8f\u6267\u884c\u8fd9\u51e0\u6761\u547d\u4ee4\uff08DNS \u76f8\u5173\u5224\u65ad\u653e\u5728\u4e0b\u4e00\u6b65\uff09\uff1a<\/p>\n

# \u67e5\u770b\u5b9e\u65f6\u5e26\u5bbd\u6d41\u91cf\uff0c\u786e\u8ba4\u662f\u5426\u88ab\u5927\u6d41\u91cf\u6253\u6ee1\niftop -nNP\n\n# \u7edf\u8ba1\u5f53\u524d TCP \u8fde\u63a5\u72b6\u6001\u5206\u5e03\uff0cCC \u653b\u51fb\u4f1a\u770b\u5230\u5927\u91cf ESTABLISHED \u6216 SYN_RECV\nss -ant | awk '{print $1}' | sort | uniq -c | sort -rn\n\n# \u627e\u51fa\u8fde\u63a5\u6570\u6700\u9ad8\u7684\u6765\u6e90 IP\nss -ant | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -rn | head -20\n\n# \u67e5\u770b Web \u8bbf\u95ee\u65e5\u5fd7\u4e2d\u8bf7\u6c42\u6700\u731b\u7684 IP \u548c URL\nawk '{print $1}' \/var\/log\/nginx\/access.log | sort | uniq -c | sort -rn | head -20\n\n# \u786e\u8ba4\u57df\u540d\u5f53\u524d\u89e3\u6790\u6307\u5411\u7684 IP\uff0c\u6392\u67e5\u662f\u5426\u88ab DNS\uff08\u57df\u540d\u89e3\u6790\u7cfb\u7edf\uff09\u52ab\u6301\u6216\u89e3\u6790\u9519\u8bef\ndig +short yourdomain.com\n<\/code><\/pre>\n
\u5224\u65ad\u4f9d\u636e\u53ef\u4ee5\u7b80\u5316\u6210\u4e09\u53e5\u8bdd\uff1a\u5e26\u5bbd\u8dd1\u6ee1\u4e14\u6765\u6e90 IP \u9ad8\u5ea6\u5206\u6563\uff0c\u5927\u6982\u7387\u662f\u6d41\u91cf\u578b DDoS\uff1b\u8fde\u63a5\u6570\u4e0a\u4e07\u4f46\u5e26\u5bbd\u4e0d\u9ad8\u3001\u6765\u6e90\u96c6\u4e2d\u5728\u5c11\u6570 IP\uff0c\u591a\u534a\u662f CC \u653b\u51fb\uff08\u9488\u5bf9\u5e94\u7528\u5c42\u7684 HTTP \u8bf7\u6c42\u6d2a\u6c34\uff09\uff1b\u5982\u679c\u662f\u67d0\u51e0\u4e2a URL \u88ab\u9ad8\u9891\u8bf7\u6c42\uff08\u6bd4\u5982\u767b\u5f55\u63a5\u53e3\u3001\u641c\u7d22\u63a5\u53e3\uff09\uff0c\u5c31\u662f\u5e94\u7528\u5c42\u5b9a\u5411\u653b\u51fb\u3002\u786e\u8ba4\u7c7b\u578b\u4e4b\u540e\uff0c\u4f60\u624d\u80fd\u51b3\u5b9a\u662f\u5728\u670d\u52a1\u5668\u4e0a\u81ea\u6551\uff0c\u8fd8\u662f\u5fc5\u987b\u501f\u52a9\u4e0a\u6e38\u9632\u62a4\u3002\u60f3\u4e86\u89e3\u670d\u52a1\u5668\u5c42\u9762\u7684\u57fa\u7840\u6392\u67e5\u601d\u8def\uff0c\u53ef\u4ee5\u53c2\u8003\u670d\u52a1\u5668\u5206\u7c7b\u4e0e\u914d\u7f6e\u77e5\u8bc6<\/a>\u91cc\u7684\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n
\"DDoS<\/p>\n
\u7b2c\u4e8c\u6b65\uff1a\u7d27\u6025\u6b62\u635f\uff0c\u628a\u5f71\u54cd\u538b\u5230\u6700\u5c0f<\/h2>\n
\u786e\u8ba4\u653b\u51fb\u540e\uff0c\u5148\u505a\u4e24\u4ef6\u7acb\u523b\u89c1\u6548\u7684\u4e8b\uff1a\u5c01\u7981\u660e\u663e\u7684\u653b\u51fb\u6e90\uff0c\u4ee5\u53ca\u7ed9\u670d\u52a1\u5668\u51cf\u8d1f\u3002<\/p>\n
\u5c01\u7981\u653b\u51fb IP\u3002<\/strong> \u4ece\u4e0a\u9762\u7684\u65e5\u5fd7\u7edf\u8ba1\u91cc\u6311\u51fa\u8fde\u63a5\u6570\u5f02\u5e38\u7684 IP\uff0c\u76f4\u63a5\u5199\u5165\u9632\u706b\u5899\uff1a<\/p>\n
# \u5355\u4e2a IP \u5c01\u7981\niptables -I INPUT -s 1.2.3.4 -j DROP\n\n# \u5c01\u7981\u6574\u4e2a C \u6bb5\uff08\u653b\u51fb\u6765\u81ea\u540c\u4e00\u7f51\u6bb5\u65f6\uff09\niptables -I INPUT -s 1.2.3.0\/24 -j DROP\n<\/code><\/pre>\n
\u7ed9\u5e94\u7528\u5c42\u51cf\u538b\u3002<\/strong> \u5982\u679c\u662f CC \u653b\u51fb\uff0c\u5728 Nginx \u91cc\u52a0\u4e24\u6761\u9650\u6d41\u89c4\u5219\u5c31\u80fd\u62e6\u6389\u5927\u90e8\u5206\u65e0\u6548\u8bf7\u6c42\uff1a<\/p>\n
# \u5728 http {} \u5757\u4e2d\u5b9a\u4e49\u9650\u6d41\u533a\u57df\uff1a\u6bcf\u4e2a IP \u6bcf\u79d2\u6700\u591a 10 \u4e2a\u8bf7\u6c42\nlimit_req_zone $binary_remote_addr zone=perip:10m rate=10r\/s;\n\nserver {\n    location \/ {\n        limit_req zone=perip burst=20 nodelay;\n    }\n}\n<\/code><\/pre>\n
\u6539\u5b8c\u6267\u884c nginx -t && nginx -s reload<\/code> \u8ba9\u914d\u7f6e\u751f\u6548\u3002\u8fd9\u91cc\u6709\u4e2a\u7ecf\u9a8c\u503c\uff1a\u6b63\u5e38\u7535\u5546\u7ad9\u7684\u9996\u9875\u5237\u65b0\u4e0d\u4f1a\u8d85\u8fc7\u6bcf\u79d2 5 \u4e2a\u8bf7\u6c42\uff0c\u628a\u9608\u503c\u5b9a\u5728 10-20 \u4e4b\u95f4\uff0c\u65e2\u80fd\u6321\u4f4f\u653b\u51fb\u811a\u672c\uff0c\u53c8\u4e0d\u592a\u5bb9\u6613\u8bef\u4f24\u771f\u5b9e\u7528\u6237\u3002\u53e6\u5916\uff0c\u628a\u9759\u6001\u8d44\u6e90\u4ea4\u7ed9 CDN \u627f\u63a5\u3001\u53ea\u5728\u6e90\u7ad9\u5904\u7406\u52a8\u6001\u8bf7\u6c42\uff0c\u4e5f\u80fd\u8ba9\u670d\u52a1\u5668\u5728\u653b\u51fb\u671f\u95f4\u591a\u6491\u4e00\u6bb5\u65f6\u95f4\uff1bCDN \u76f8\u5173\u7684\u52a0\u901f\u539f\u7406\u53ef\u4ee5\u5ef6\u4f38\u9605\u8bfb\u7f51\u7ad9\u4f18\u5316\u4e0e\u9875\u9762\u52a0\u901f\u5b9e\u8df5<\/a>\u3002\u9762\u5411\u5916\u8d38\u573a\u666f\u7684\u7ad9\u70b9\uff0c\u8fd8\u53ef\u4ee5\u53c2\u8003\u7f51\u7ad9\u5b89\u5168\u9632\u62a4\u4e13\u9898<\/a>\u4e2d\u5173\u4e8e\u653b\u51fb\u9884\u9632\u7684\u957f\u671f\u505a\u6cd5\u3002<\/p>\n
\u8fd8\u6709\u4e00\u4e2a\u5bb9\u6613\u5ffd\u7565\u7684\u52a8\u4f5c\uff1a\u901a\u77e5\u4f60\u7684\u4e3b\u673a\u670d\u52a1\u5546\u3002\u5f88\u591a\u4e2d\u5c0f\u4f01\u4e1a\u7528\u7684\u662f\u666e\u901a\u865a\u62df\u4e3b\u673a<\/a>\u6216 VPS<\/a>\uff08\u865a\u62df\u4e13\u7528\u670d\u52a1\u5668<\/a>\uff09\uff0c\u5f53\u653b\u51fb\u6d41\u91cf\u8d85\u8fc7\u767e\u5146\u7ea7\u522b\u65f6\uff0c\u670d\u52a1\u5668\u81ea\u8eab\u5df2\u7ecf\u65e0\u529b\u62db\u67b6\uff0c\u53ea\u6709\u673a\u623f\u4e0a\u6e38\u7684\u6e05\u6d17\u80fd\u529b\u624d\u6321\u5f97\u4f4f\u3002\u62a5\u969c\u65f6\u76f4\u63a5\u63d0\u4f9b\u653b\u51fb\u5f00\u59cb\u65f6\u95f4\u3001\u653b\u51fb\u7c7b\u578b\u5224\u65ad\u548c\u5cf0\u503c\u6d41\u91cf\uff0c\u670d\u52a1\u5546\u4f1a\u66f4\u5feb\u54cd\u5e94\u3002<\/p>\n
\u7b2c\u4e09\u6b65\uff1a\u8bc4\u4f30\u6062\u590d\u65b9\u6848\uff0c\u5fc5\u8981\u65f6\u5207\u6362\u9ad8\u9632<\/h2>\n
\u5982\u679c\u653b\u51fb\u6301\u7eed\u8d85\u8fc7\u4e00\u5c0f\u65f6\u8fd8\u6ca1\u6709\u8870\u51cf\u8ff9\u8c61\uff0c\u5c31\u8be5\u8003\u8651\u5347\u7ea7\u5e94\u5bf9\u624b\u6bb5\u4e86\u3002\u8fd9\u4e00\u6b65\u7684\u6838\u5fc3\u662f\u5224\u65ad\uff1a\u625b\u4e0d\u4f4f\u7684\u5230\u5e95\u662f\u5e26\u5bbd\uff0c\u8fd8\u662f\u5e94\u7528\u672c\u8eab\u3002<\/p>\n
\u6d41\u91cf\u578b\u653b\u51fb\uff08UDP \u6d2a\u6c34\u3001SYN \u6d2a\u6c34\u8fd9\u7c7b\uff09\u9760\u670d\u52a1\u5668\u8f6f\u4ef6\u65e0\u89e3\uff0c\u56e0\u4e3a\u653b\u51fb\u5305\u5728\u5230\u8fbe\u7f51\u5361\u4e4b\u524d\u5c31\u628a\u5e26\u5bbd\u5403\u5149\u4e86\u3002\u6b64\u65f6\u552f\u4e00\u6709\u6548\u7684\u8def\u5f84\u662f\u63a5\u5165\u9ad8\u9632\u670d\u52a1\uff1a\u6d41\u91cf\u5148\u7ecf\u8fc7\u670d\u52a1\u5546\u7684\u6e05\u6d17\u4e2d\u5fc3\uff0c\u6076\u610f\u6d41\u91cf\u88ab\u8fc7\u6ee4\u6389\uff0c\u6b63\u5e38\u8bf7\u6c42\u518d\u56de\u6e90\u5230\u4f60\u7684\u670d\u52a1\u5668\u3002\u4ee5 Hostease \u7684\u9ad8\u9632\u65b9\u6848\u4e3a\u4f8b\uff0c\u63a5\u5165\u540e\u6e90\u7ad9 IP \u4f1a\u88ab\u66ff\u6362\u6210\u9632\u62a4\u8282\u70b9\u5730\u5740\uff0c\u653b\u51fb\u6d41\u91cf\u5728\u8282\u70b9\u5c42\u5c31\u88ab\u5438\u6536\uff0c\u4e1a\u52a1\u6062\u590d\u65f6\u95f4\u901a\u5e38\u53ef\u4ee5\u538b\u7f29\u5230\u5206\u949f\u7ea7\u3002\u4ece\u7f51\u7edc\u67b6\u6784\u4e0a\u770b\uff0c\u8fd9\u7c7b\u9632\u62a4\u4e0e\u4e91\u6280\u672f\u670d\u52a1\u7684\u5f39\u6027\u9632\u62a4\u601d\u8def<\/a>\u662f\u4e00\u8109\u76f8\u627f\u7684\u3002<\/p>\n
\u5207\u6362\u524d\u7684\u4e09\u4e2a\u68c0\u67e5\u52a8\u4f5c\uff1a<\/p>\n