{"id":57665,"date":"2025-03-02T13:57:37","date_gmt":"2025-03-02T05:57:37","guid":{"rendered":"https:\/\/fwq.ai\/blog\/?p=57665"},"modified":"2025-03-02T13:57:37","modified_gmt":"2025-03-02T05:57:37","slug":"%e4%bc%98%e5%8c%96%e7%be%8e%e5%9b%bd%e6%9c%8d%e5%8a%a1%e5%99%a8linux-tcp%e8%ae%be%e7%bd%ae%ef%bc%8c%e6%8f%90%e9%ab%98%e7%bd%91%e7%bb%9c%e4%bc%a0%e8%be%93%e6%95%88%e7%8e%87","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/57665\/","title":{"rendered":"\u4f18\u5316\u7f8e\u56fd\u670d\u52a1\u5668Linux TCP\u8bbe\u7f6e\uff0c\u63d0\u9ad8\u7f51\u7edc\u4f20\u8f93\u6548\u7387"},"content":{"rendered":"

 <\/p>\n

\u4e00\u3001\u524d\u8a00<\/h2>\n

\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u5408\u7406\u4f18\u5316TCP\u7f51\u7edc\u53c2\u6570\u5bf9\u63d0\u5347\u7f51\u7edc\u6027\u80fd\u3001\u964d\u4f4e\u5ef6\u8fdf\u3001\u63d0\u9ad8\u541e\u5410\u91cf\u4ee5\u53ca\u4f18\u5316\u8d44\u6e90\u5229\u7528\u7387\u81f3\u5173\u91cd\u8981\u3002\u5c24\u5176\u662f\u5bf9\u4e8e\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\u800c\u8a00\uff0c\u9762\u5bf9\u9ad8\u5e76\u53d1\u8bbf\u95ee\u548c\u5927\u6570\u636e\u4f20\u8f93\uff0c\u4f18\u5316\u7f51\u7edc\u53c2\u6570\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u901a\u4fe1\u7a33\u5b9a\u6027\uff0c\u5e76\u9632\u6b62\u7f51\u7edc\u62e5\u585e\u3002<\/p>\n

\u4f18\u5316TCP\u53c2\u6570\u7684\u4e3b\u8981\u76ee\u7684\u662f\u51cf\u5c11\u8fde\u63a5\u8d85\u65f6\u3001\u589e\u5f3a\u7f51\u7edc\u6545\u969c\u6062\u590d\u80fd\u529b\u3001\u63d0\u5347\u4f20\u8f93\u6548\u7387\uff0c\u5e76\u786e\u4fdd\u670d\u52a1\u7684\u9ad8\u53ef\u7528\u6027\u3002\u4ee5\u4e0b\u662f\u9488\u5bf9\u7f8e\u56fd\u670d\u52a1\u5668<\/strong>\u5e38\u89c1\u7684TCP\u7f51\u7edc\u4f18\u5316\u7b56\u7565\u53ca\u5176\u914d\u7f6e\u65b9\u6cd5\u3002<\/p>\n

\n

\u4e8c\u3001\u4f20\u8f93\u5c42\u4f18\u5316<\/h2>\n

2.1 \u4f18\u5316TCP SYN\u91cd\u4f20\u6b21\u6570<\/strong><\/h3>\n

\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u901a\u8fc7\u51cf\u5c11SYN\u91cd\u4f20\u6b21\u6570\uff0c\u964d\u4f4e\u8fde\u63a5\u963b\u585e\u65f6\u95f4\uff0c\u63d0\u5347\u8fde\u63a5\u5efa\u7acb\u901f\u5ea6\u3002<\/p>\n

\u9ed8\u8ba4\u503c\uff1a<\/strong> 6\uff08127\u79d2\u8d85\u65f6\uff09
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n

net.ipv4.tcp_syn_retries = 2\r\n<\/code><\/pre>\n
2.2 \u4f18\u5316\u534a\u8fde\u63a5\u961f\u5217\uff08SYN Queue\uff09<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u589e\u5927\u534a\u8fde\u63a5\u961f\u5217\uff0c\u9632\u6b62SYN\u5305\u56e0\u961f\u5217\u6ea2\u51fa\u88ab\u4e22\u5f03\uff0c\u63d0\u5347\u670d\u52a1\u5668\u54cd\u5e94\u80fd\u529b\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 128
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.tcp_max_syn_backlog = 16384\r\n<\/code><\/pre>\n
2.3 \u5f00\u542fSYN Cookies\u9632\u5fa1\u653b\u51fb<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u901a\u8fc7SYN Cookies\u673a\u5236\u9632\u6b62SYN Flood\u653b\u51fb\uff0c\u63d0\u9ad8\u670d\u52a1\u5668\u5b89\u5168\u6027\u3002<\/p>\n
\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.tcp_syncookies = 1\r\n<\/code><\/pre>\n
2.4 \u4f18\u5316TCP SYNACK\u91cd\u4f20\u6b21\u6570<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u964d\u4f4e\u670d\u52a1\u5668\u7aefSYNACK\u7684\u91cd\u4f20\u6b21\u6570\uff0c\u51cf\u5c11\u8d44\u6e90\u6d6a\u8d39\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 5
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.tcp_synack_retries = 2\r\n<\/code><\/pre>\n
2.5 \u4f18\u5316\u5168\u8fde\u63a5\u961f\u5217\uff08Accept Queue\uff09<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u589e\u52a0\u5168\u8fde\u63a5\u961f\u5217\u5927\u5c0f\uff0c\u63d0\u5347\u9ad8\u5e76\u53d1\u8fde\u63a5\u5904\u7406\u80fd\u529b\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 1024
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.core.somaxconn = 16384\r\n<\/code><\/pre>\n
2.6 \u63a7\u5236\u5168\u8fde\u63a5\u6ea2\u51fa\u662f\u5426\u901a\u77e5\u5ba2\u6237\u7aef<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u9002\u5f53\u8c03\u6574tcp_abort_on_overflow\u53c2\u6570\uff0c\u907f\u514d\u8fde\u63a5\u4e22\u5f03\u5bfc\u81f4\u5ba2\u6237\u7aef\u91cd\u8bd5\u5931\u8d25\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 0\uff08\u4e0d\u901a\u77e5\uff09
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.tcp_abort_on_overflow = 0\r\n<\/code><\/pre>\n
2.7 \u4f18\u5316FIN\u8d85\u65f6\u65f6\u95f4<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u51cf\u5c11FIN_WAIT_2\u72b6\u6001\u7684\u65f6\u95f4\uff0c\u9632\u6b62\u8d44\u6e90\u5360\u7528\u8fc7\u4e45\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 60s
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.tcp_fin_timeout = 2\r\n<\/code><\/pre>\n
2.8 \u4f18\u5316TIME_WAIT\u72b6\u6001<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u901a\u8fc7\u8c03\u6574TIME_WAIT\u72b6\u6001\uff0c\u51cf\u5c11\u7aef\u53e3\u5360\u7528\uff0c\u63d0\u9ad8\u8fde\u63a5\u53ef\u7528\u6027\u3002<\/p>\n
\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.tcp_max_tw_buckets = 10000\r\nnet.ipv4.tcp_tw_reuse = 1\r\nnet.ipv4.tcp_tw_recycle = 0\r\n<\/code><\/pre>\n
2.9 \u4f18\u5316TCP\u53d1\u9001\u7f13\u51b2\u533a<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u63d0\u9ad8\u6570\u636e\u53d1\u9001\u6027\u80fd\uff0c\u51cf\u5c11\u963b\u585e\u60c5\u51b5\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 4096 16384 4194304
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.tcp_wmem = 8192 65536 16777216\r\n<\/code><\/pre>\n
2.10 \u4f18\u5316\u5957\u63a5\u5b57\u53d1\u9001\u7f13\u51b2\u533a<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u63d0\u9ad8\u5355\u4e2aTCP\u8fde\u63a5\u7684\u53d1\u9001\u80fd\u529b\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 212992
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.core.wmem_max = 16777216\r\n<\/code><\/pre>\n
2.11 \u4f18\u5316TCP\u63a5\u6536\u7f13\u51b2\u533a<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u63d0\u9ad8\u6570\u636e\u63a5\u6536\u80fd\u529b\uff0c\u51cf\u5c11\u4e22\u5305\u6982\u7387\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 4096 87380 6291456
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.tcp_rmem = 8192 65536 16777216\r\n<\/code><\/pre>\n
2.12 \u4f18\u5316\u5957\u63a5\u5b57\u63a5\u6536\u7f13\u51b2\u533a<\/strong><\/h3>\n
\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.core.rmem_max = 16777216\r\n<\/code><\/pre>\n
2.13 \u4f18\u5316TCP\u5185\u5b58\u6d88\u8017\u9650\u5236<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u9650\u5236\u6240\u6709TCP\u8fde\u63a5\u7684\u603b\u5185\u5b58\u4f7f\u7528\u91cf\uff0c\u9632\u6b62\u7cfb\u7edf\u8d44\u6e90\u8017\u5c3d\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 88053 117407 176106\uff08\u4ee5Page\u8ba1\u7b97\uff09
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.tcp_mem = 8388608 12582912 16777216\r\n<\/code><\/pre>\n
2.14 \u4f18\u5316CPU\u8f6e\u8be2\u5904\u7406\u6570\u636e\u5305\u6570\u91cf<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u63d0\u9ad8\u7f51\u7edc\u541e\u5410\u91cf\uff0c\u964d\u4f4eCPU\u4e2d\u65ad\u5f00\u9500\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 300
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.core.netdev_budget = 600\r\n<\/code><\/pre>\n
\n
\u4e09\u3001\u7f51\u7edc\u5c42\u4f18\u5316<\/h2>\n
3.1 \u6269\u5927\u672c\u5730\u7aef\u53e3\u8303\u56f4<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u9002\u7528\u4e8e\u9ad8\u5e76\u53d1\u8fde\u63a5\u573a\u666f\uff0c\u907f\u514d\u7aef\u53e3\u8017\u5c3d\u95ee\u9898\u3002<\/p>\n
\u9ed8\u8ba4\u503c\uff1a<\/strong> 32768 – 60999
\n\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
net.ipv4.ip_local_port_range = 1024 65535\r\n<\/code><\/pre>\n
3.2 \u8c03\u6574txqueuelen\u961f\u5217\u957f\u5ea6<\/strong><\/h3>\n
\u4f18\u5316\u76ee\u6807\uff1a<\/strong> \u589e\u5927\u7f51\u7edc\u63a5\u53e3\u6392\u961f\u957f\u5ea6\uff0c\u51cf\u5c11\u4e22\u5305\uff0c\u63d0\u9ad8\u4f20\u8f93\u6548\u7387\u3002<\/p>\n
\u4f18\u5316\u914d\u7f6e\uff1a<\/strong><\/p>\n
ip link set eth0 txqueuelen 2000\r\n<\/code><\/pre>\n
\n
\u56db\u3001\u603b\u7ed3<\/h2>\n
\u9488\u5bf9\u7f8e\u56fd\u670d\u52a1\u5668<\/strong><\/a>\u7684Linux\u7cfb\u7edf\u4f18\u5316\uff0c\u8c03\u6574TCP\u7f51\u7edc\u53c2\u6570\u80fd\u591f\u663e\u8457\u63d0\u5347\u7cfb\u7edf\u7684\u7f51\u7edc\u6027\u80fd\u3001\u7a33\u5b9a\u6027\u53ca\u541e\u5410\u91cf\u3002\u5c24\u5176\u662f\u5728\u9ad8\u5e76\u53d1\u3001\u5927\u6570\u636e\u4f20\u8f93\u53ca\u4f4e\u5ef6\u8fdf\u9700\u6c42\u7684\u573a\u666f\u4e0b\uff0c\u4f18\u5316\u8fd9\u4e9b\u53c2\u6570\u6709\u52a9\u4e8e\u51cf\u5c11\u8fde\u63a5\u8d85\u65f6\u3001\u63d0\u9ad8\u8d44\u6e90\u5229\u7528\u7387\uff0c\u589e\u5f3a\u670d\u52a1\u5668\u7684\u627f\u8f7d\u80fd\u529b\u3002<\/p>\n
\u5728\u5b9e\u65bd\u4f18\u5316\u65f6\uff0c\u5efa\u8bae\u7ed3\u5408\u670d\u52a1\u5668\u7684\u5177\u4f53\u4e1a\u52a1\u9700\u6c42\u8fdb\u884c\u6d4b\u8bd5\u548c\u8c03\u6574\uff0c\u4ee5\u786e\u4fdd\u6700\u4f73\u6027\u80fd\u8868\u73b0\u3002\u5e0c\u671b\u672c\u6307\u5357\u80fd\u5e2e\u52a9\u63d0\u5347\u60a8\u7684\u7f8e\u56fd\u670d\u52a1\u5668\u7f51\u7edc\u6027\u80fd\uff0c\u4f7f\u5176\u66f4\u52a0\u7a33\u5b9a\u9ad8\u6548\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
  \u4e00\u3001\u524d\u8a00 \u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u5408\u7406\u4f18\u5316TCP\u7f51\u7edc\u53c2\u6570\u5bf9\u63d0\u5347\u7f51\u7edc\u6027\u80fd\u3001\u964d\u4f4e\u5ef6\u8fdf\u3001\u63d0\u9ad8\u541e\u5410\u91cf\u4ee5\u53ca\u4f18\u5316\u8d44\u6e90\u5229\u7528\u7387\u81f3\u5173\u91cd\u8981\u3002\u5c24\u5176\u662f\u5bf9\u4e8e\u7f8e\u56fd\u670d\u52a1\u5668\u800c\u8a00\uff0c\u9762\u5bf9\u9ad8\u5e76\u53d1\u8bbf\u95ee\u548c\u5927\u6570\u636e\u4f20\u8f93\uff0c\u4f18\u5316\u7f51\u7edc\u53c2\u6570\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u901a\u4fe1\u7a33\u5b9a\u6027\uff0c\u5e76\u9632\u6b62\u7f51\u7edc\u62e5\u585e\u3002 \u4f18\u5316TCP\u53c2\u6570\u7684\u4e3b\u8981\u76ee\u7684\u662f\u51cf\u5c11\u8fde\u63a5\u8d85\u65f6\u3001\u589e\u5f3a\u7f51\u7edc\u6545\u969c\u6062\u590d\u80fd\u529b\u3001\u63d0\u5347\u4f20\u8f93\u6548\u7387\uff0c\u5e76\u786e\u4fdd\u670d\u52a1\u7684\u9ad8\u53ef\u7528\u6027\u3002\u4ee5\u4e0b\u662f\u9488\u5bf9\u7f8e\u56fd\u670d\u52a1\u5668\u5e38\u89c1\u7684TCP\u7f51\u7edc\u4f18\u5316\u7b56\u7565\u53ca\u5176\u914d\u7f6e\u65b9\u6cd5\u3002 \u4e8c\u3001\u4f20\u8f93\u5c42\u4f18\u5316 2.1 \u4f18\u5316TCP SYN\u91cd\u4f20\u6b21\u6570 \u4f18\u5316\u76ee\u6807\uff1a \u901a\u8fc7\u51cf\u5c11SYN\u91cd\u4f20\u6b21\u6570\uff0c\u964d\u4f4e\u8fde\u63a5\u963b\u585e\u65f6\u95f4\uff0c\u63d0\u5347\u8fde\u63a5\u5efa\u7acb\u901f\u5ea6\u3002 \u9ed8\u8ba4\u503c\uff1a 6\uff08127\u79d2\u8d85\u65f6\uff09 \u4f18\u5316\u914d\u7f6e\uff1a net.ipv4.tcp_syn_retries = 2 2.2 \u4f18\u5316\u534a\u8fde\u63a5\u961f\u5217\uff08SYN Queue\uff09 \u4f18\u5316\u76ee\u6807\uff1a \u589e\u5927\u534a\u8fde\u63a5\u961f\u5217\uff0c\u9632\u6b62SYN\u5305\u56e0\u961f\u5217\u6ea2\u51fa\u88ab\u4e22\u5f03\uff0c\u63d0\u5347\u670d\u52a1\u5668\u54cd\u5e94\u80fd\u529b\u3002 \u9ed8\u8ba4\u503c\uff1a 128 \u4f18\u5316\u914d\u7f6e\uff1a net.ipv4.tcp_max_syn_backlog = 16384 2.3 \u5f00\u542fSYN Cookies\u9632\u5fa1\u653b\u51fb \u4f18\u5316\u76ee\u6807\uff1a \u901a\u8fc7SYN Cookies\u673a\u5236\u9632\u6b62SYN Flood\u653b\u51fb\uff0c\u63d0\u9ad8\u670d\u52a1\u5668\u5b89\u5168\u6027\u3002 \u4f18\u5316\u914d\u7f6e\uff1a net.ipv4.tcp_syncookies = 1 2.4 \u4f18\u5316TCP SYNACK\u91cd\u4f20\u6b21\u6570 \u4f18\u5316\u76ee\u6807\uff1a \u964d\u4f4e\u670d\u52a1\u5668\u7aefSYNACK\u7684\u91cd\u4f20\u6b21\u6570\uff0c\u51cf\u5c11\u8d44\u6e90\u6d6a\u8d39\u3002 \u9ed8\u8ba4\u503c\uff1a 5 \u4f18\u5316\u914d\u7f6e\uff1a net.ipv4.tcp_synack_retries = 2 2.5 \u4f18\u5316\u5168\u8fde\u63a5\u961f\u5217\uff08Accept Queue\uff09 \u4f18\u5316\u76ee\u6807\uff1a \u589e\u52a0\u5168\u8fde\u63a5\u961f\u5217\u5927\u5c0f\uff0c\u63d0\u5347\u9ad8\u5e76\u53d1\u8fde\u63a5\u5904\u7406\u80fd\u529b\u3002 \u9ed8\u8ba4\u503c\uff1a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-57665","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/57665","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=57665"}],"version-history":[{"count":1,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/57665\/revisions"}],"predecessor-version":[{"id":57667,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/57665\/revisions\/57667"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=57665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=57665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=57665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}