{"id":209330,"date":"2025-09-30T08:26:15","date_gmt":"2025-09-30T00:26:15","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209330\/"},"modified":"2025-09-30T08:26:16","modified_gmt":"2025-09-30T00:26:16","slug":"sysctl","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209330\/","title":{"rendered":"\u9999\u6e2fVPS\u5b9e\u6218\uff1a\u7528sysctl\u4f18\u5316\u5185\u6838\u53c2\u6570\uff0c\u663e\u8457\u63d0\u5347\u7f51\u7edc\u4e0e\u5e76\u53d1\u6027\u80fd"},"content":{"rendered":"<p>\u5728\u5b9e\u9645\u8fd0\u7ef4\u4e2d\uff0c\u5c24\u5176\u662f\u90e8\u7f72\u5728\u5ef6\u8fdf\u654f\u611f\u6216\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u7684\u5e94\u7528\uff08\u5982\u7f51\u9875\u670d\u52a1\u5668\u3001\u53cd\u5411\u4ee3\u7406\u3001\u5b9e\u65f6\u901a\u4fe1\u3001\u6e38\u620f\u670d\u52a1\u5668\u6216\u9ad8\u5e76\u53d1 API\uff09\uff0c\u638c\u63e1\u901a\u8fc7 <strong>sysctl<\/strong> \u4f18\u5316 Linux \u5185\u6838\u7f51\u7edc\u4e0e\u5e76\u53d1\u76f8\u5173\u53c2\u6570\uff0c\u80fd\u663e\u8457\u63d0\u5347\u9999\u6e2f VPS \u7684\u7a33\u5b9a\u6027\u4e0e\u541e\u5410\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\uff0c\u7cfb\u7edf\u8bb2\u89e3\u6838\u5fc3\u539f\u7406\u3001\u5178\u578b\u914d\u7f6e\u9879\u3001\u5e94\u7528\u573a\u666f\u4e0e\u9009\u8d2d\u5efa\u8bae\uff0c\u5e2e\u52a9\u4f60\u5728\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fdVPS\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u7b49\u4e91\u4e3b\u673a\u73af\u5883\u4e2d\u83b7\u5f97\u66f4\u4f18\u8868\u73b0\u3002<\/p>\n<h2>\u4e3a\u4f55\u901a\u8fc7 sysctl \u4f18\u5316\u5185\u6838\u53c2\u6570\u80fd\u5e26\u6765\u660e\u663e\u63d0\u5347<\/h2>\n<p>Linux \u5185\u6838\u7f51\u7edc\u6808\u548c\u6587\u4ef6\u63cf\u8ff0\u7b26\u9650\u5236\u7b49\u9ed8\u8ba4\u503c\u8bbe\u8ba1\u504f\u5411\u517c\u5bb9\u6027\u800c\u975e\u6781\u9650\u6027\u80fd\u3002\u5728\u9ad8\u5e76\u53d1\u6216\u5927\u8fde\u63a5\u91cf\u573a\u666f\u4e0b\uff0c\u9ed8\u8ba4\u8bbe\u7f6e\u5f88\u5bb9\u6613\u6210\u4e3a\u74f6\u9888\u3002\u901a\u8fc7\u8c03\u6574 sysctl \u53c2\u6570\uff0c\u4f60\u53ef\u4ee5\uff1a<\/p>\n<ul>\n<li>\u589e\u5927\u5185\u6838\u5141\u8bb8\u7684\u5e76\u53d1\u8fde\u63a5\u961f\u5217\u4e0e\u5957\u63a5\u5b57\u7f13\u51b2\uff0c\u51cf\u5c11\u8fde\u63a5\u62d2\u7edd\u6216\u6392\u961f\u8fc7\u957f\u5bfc\u81f4\u7684\u8d85\u65f6\uff1b<\/li>\n<li>\u7f29\u77ed\u8fde\u63a5\u56de\u6536\u4e0e\u8d85\u65f6\uff0c\u91ca\u653e\u5360\u7528\u7684\u5185\u6838\u8d44\u6e90\uff0c\u63d0\u9ad8\u5e76\u53d1\u5904\u7406\u80fd\u529b\uff1b<\/li>\n<li>\u9009\u62e9\u66f4\u5408\u9002\u7684\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\uff08\u5982 BBR\uff09\uff0c\u63d0\u5347\u8de8\u5883\u8bbf\u95ee\u65f6\u7684\u541e\u5410\u548c\u7a33\u5b9a\u6027\uff1b<\/li>\n<li>\u63d0\u9ad8\u7cfb\u7edf\u6587\u4ef6\u53e5\u67c4\u9650\u5236\uff0c\u4e3a\u5927\u91cf\u77ed\u8fde\u63a5\u6216\u957f\u8fde\u63a5\u63d0\u4f9b\u652f\u6301\u3002<\/li>\n<\/ul>\n<h2>\u6838\u5fc3\u539f\u7406\u4e0e\u5e38\u7528 sysctl \u53c2\u6570\u8be6\u89e3<\/h2>\n<h3>\u7f51\u7edc\u8fde\u63a5\u961f\u5217\u4e0e\u7f13\u51b2<\/h3>\n<p>\u5e38\u89c1\u5f71\u54cd\u5e76\u53d1\u8fde\u63a5\u7684\u53c2\u6570\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>net.core.somaxconn<\/strong>\uff1alisten() \u7684 backlog \u9650\u5236\uff0c\u5efa\u8bae\u8bbe\u7f6e\u4e3a 1024 \u6216\u66f4\u9ad8\uff08\u5982 4096\uff09\uff0c\u914d\u5408\u5e94\u7528\u5c42 backlog \u8c03\u6574\uff1b<\/li>\n<li><strong>net.core.netdev_max_backlog<\/strong>\uff1a\u5185\u6838\u7f51\u7edc\u63a5\u6536\u961f\u5217\u957f\u5ea6\uff0c\u5f71\u54cd\u7a81\u53d1\u5305\u7684\u7f13\u5b58\u80fd\u529b\uff0c\u63a8\u8350\u503c 2500~10000 \u4f9d\u636e\u5e26\u5bbd\u548c\u5305\u901f\u7387\uff1b<\/li>\n<li><strong>net.core.rmem_default \/ net.core.rmem_max<\/strong> \u4e0e <strong>net.core.wmem_default \/ net.core.wmem_max<\/strong>\uff1asocket \u8bfb\u5199\u7f13\u51b2\u533a\u5927\u5c0f\uff0c\u9002\u5f53\u589e\u5927\u53ef\u63d0\u5347\u9ad8\u5e26\u5bbd-\u9ad8\u5ef6\u8fdf\u94fe\u8def\u7684\u541e\u5410\u3002<\/li>\n<\/ul>\n<h3>TCP \u8fde\u63a5\u7ba1\u7406<\/h3>\n<p>\u5f71\u54cd\u5927\u91cf\u77ed\u8fde\u63a5\u548c TIME_WAIT \u72b6\u6001\u7684\u53c2\u6570\uff1a<\/p>\n<ul>\n<li><strong>net.ipv4.tcp_max_syn_backlog<\/strong>\uff1a\u534a\u8fde\u63a5\u961f\u5217\u957f\u5ea6\uff0c\u5efa\u8bae\u4e0e somaxconn \u540c\u6b65\u589e\u5927\uff0c\u9632\u6b62 SYN \u6d2a\u6cdb\u5bfc\u81f4\u8fde\u63a5\u4e22\u5f03\uff1b<\/li>\n<li><strong>net.ipv4.tcp_fin_timeout<\/strong>\uff1a\u4e3b\u52a8\u5173\u95ed\u7aef\u5728 FIN \u72b6\u6001\u4e0b\u7684\u8d85\u65f6\uff0c\u9002\u5f53\u964d\u4f4e\u53ef\u66f4\u5feb\u91ca\u653e\u8d44\u6e90\uff08\u4f8b\u5982 30 -&gt; 15\uff09\uff1b<\/li>\n<li><strong>net.ipv4.tcp_tw_reuse<\/strong>\uff1a\u5141\u8bb8\u91cd\u7528 TIME_WAIT \u5957\u63a5\u5b57\u7528\u4e8e\u65b0\u7684\u8fde\u63a5\uff08\u5728 NAT \u73af\u5883\u6216\u9ad8\u5e76\u53d1\u77ed\u8fde\u63a5\u573a\u666f\u53ef\u8003\u8651\u5f00\u542f\uff09\uff1b<\/li>\n<li><strong>net.ipv4.tcp_syncookies<\/strong>\uff1a\u542f\u7528 SYN cookies \u62b5\u5fa1 SYN \u6d2a\u6cdb\u653b\u51fb\uff0c\u540c\u65f6\u517c\u987e\u8fde\u63a5\u53ef\u9760\u6027\uff1b<\/li>\n<li><strong>net.ipv4.tcp_congestion_control<\/strong>\uff1a\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\uff0c\u53ef\u8bbe\u4e3a <strong>bbr<\/strong> \u6216 <strong>cubic<\/strong>\u3002\u5bf9\u4e8e\u8de8\u56fd\u94fe\u8def\uff08\u5982\u9999\u6e2f\u5f80\u7f8e\u4e1c\u7684\u8bbf\u95ee\uff09\uff0cBBR \u5bf9\u4e22\u5305\u80a5\u6a2a\u5ef6\u8fdf\u654f\u611f\u7684\u94fe\u8def\u901a\u5e38\u80fd\u5e26\u6765\u541e\u5410\u63d0\u5347\u3002<\/li>\n<\/ul>\n<h3>\u6587\u4ef6\u53e5\u67c4\u4e0e\u8fdb\u7a0b\u9650\u5236<\/h3>\n<p>\u9ad8\u5e76\u53d1\u4e0d\u4ec5\u662f TCP \u5c42\u9762\uff0c\u7528\u6237\u6001\u8d44\u6e90\u4e5f\u4f1a\u6210\u4e3a\u74f6\u9888\uff1a<\/p>\n<ul>\n<li><strong>fs.file-max<\/strong>\uff1a\u7cfb\u7edf\u7ea7\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\u9650\uff0c\u5efa\u8bae\u8bbe\u7f6e\u4e3a 100000 \u6216\u66f4\u9ad8\uff0c\u6839\u636e\u5e76\u53d1\u8fde\u63a5\u6570\u9884\u4f30\uff1b<\/li>\n<li>\u540c\u65f6\u9700\u8981\u8c03\u6574\u7528\u6237\u7ea7\u522b ulimit\uff08nofile\uff09\u4ee5\u53ca\u670d\u52a1\u7ba1\u7406\u5668\uff08systemd\uff09\u4e2d\u7684 LimitNOFILE\u3002<\/li>\n<\/ul>\n<h2>\u5178\u578b sysctl \u793a\u4f8b\u4e0e\u6301\u4e45\u5316\u65b9\u6cd5<\/h2>\n<p>\u4e0b\u9762\u7ed9\u51fa\u4e00\u7ec4\u5728\u9999\u6e2f VPS \u4e0a\u5e38\u89c1\u7684\u8c03\u4f18\u503c\u4f5c\u4e3a\u53c2\u8003\uff08\u8bf7\u6839\u636e\u5b9e\u9645\u8d1f\u8f7d\u3001\u5185\u5b58\u4e0e\u7f51\u7edc\u5e26\u5bbd\u9010\u6b65\u8c03\u6574\u5e76\u89c2\u5bdf\uff09\uff1a<\/p>\n<ul>\n<li>net.core.somaxconn = 4096<\/li>\n<li>net.core.netdev_max_backlog = 5000<\/li>\n<li>net.core.rmem_max = 16777216<\/li>\n<li>net.core.wmem_max = 16777216<\/li>\n<li>net.ipv4.tcp_max_syn_backlog = 4096<\/li>\n<li>net.ipv4.tcp_fin_timeout = 15<\/li>\n<li>net.ipv4.tcp_tw_reuse = 1<\/li>\n<li>net.ipv4.tcp_syncookies = 1<\/li>\n<li>net.ipv4.tcp_congestion_control = bbr<\/li>\n<li>fs.file-max = 200000<\/li>\n<\/ul>\n<p>\u4e34\u65f6\u751f\u6548\u547d\u4ee4\u793a\u4f8b\uff1a<strong>sysctl -w net.core.somaxconn=4096<\/strong>\u3002\u8981\u6c38\u4e45\u751f\u6548\uff0c\u53ef\u5c06\u4e0a\u8ff0\u914d\u7f6e\u52a0\u5165 \/etc\/sysctl.conf \u6216 \/etc\/sysctl.d\/90-custom.conf\uff0c\u7136\u540e\u6267\u884c <strong>sysctl -p<\/strong>\u3002<\/p>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u6218\u5efa\u8bae<\/h2>\n<h3>\u9ad8\u5e76\u53d1 Web \u670d\u52a1\uff08Nginx \/ Apache \/ Node.js\uff09<\/h3>\n<p>\u5728\u7ad9\u7fa4\u6216\u9ad8\u5e76\u53d1 API \u573a\u666f\uff0cNginx \u7684 accept backlog\u3001worker_connections \u7b49\u9700\u4e0e\u5185\u6838\u53c2\u6570\u914d\u5408\uff1a<\/p>\n<ul>\n<li>\u5728 Nginx \u914d\u7f6e\u4e2d\u63d0\u9ad8 worker_connections \u4e0e worker_rlimit_nofile\uff1b<\/li>\n<li>\u5185\u6838\u5c42\u4f7f\u7528\u66f4\u5927\u7684 somaxconn \u4e0e netdev_max_backlog\uff0c\u9632\u6b62\u77ed\u65f6\u95f4\u5185\u7684\u8bf7\u6c42\u4e22\u5931\uff1b<\/li>\n<li>\u5f00\u542f keepalive \u4f46\u8bbe\u7f6e\u5408\u7406\u7684 keepalive_timeout\uff0c\u6743\u8861\u8fde\u63a5\u590d\u7528\u4e0e\u8d44\u6e90\u5360\u7528\u3002<\/li>\n<\/ul>\n<h3>\u8de8\u5883\u8bbf\u95ee\uff08\u9999\u6e2f\u670d\u52a1\u5668\/\u7f8e\u56fdVPS\/\u7f8e\u56fd\u670d\u52a1\u5668\uff09<\/h3>\n<p>\u9999\u6e2f VPS \u901a\u5e38\u9762\u5411\u4e9a\u592a\u5730\u533a\u7528\u6237\u5ef6\u8fdf\u66f4\u4f4e\uff0c\u4f46\u82e5\u9700\u8981\u670d\u52a1\u7f8e\u56fd\u7528\u6237\uff0c\u7f51\u7edc\u5f80\u8fd4\u65f6\u5ef6\u4e0e\u4e22\u5305\u7387\u4f1a\u5bf9\u541e\u5410\u9020\u6210\u5f71\u54cd\u3002\u6b64\u65f6\uff1a<\/p>\n<ul>\n<li>\u8003\u8651\u542f\u7528 BBR \u62e5\u585e\u63a7\u5236\u6765\u6539\u5584\u9ad8\u5e26\u5bbd-\u9ad8\u5ef6\u8fdf\u94fe\u8def\u541e\u5410\uff1b<\/li>\n<li>\u589e\u52a0 socket \u7f13\u51b2\u533a\uff08rmem\/wmem\uff09\u4ee5\u9002\u914d\u66f4\u5927\u7684\u5e26\u5bbd\u5ef6\u8fdf\u4e58\u79ef\uff08BDP\uff09\uff1b<\/li>\n<li>\u82e5\u4f7f\u7528\u7f8e\u56fdVPS \u505a\u4e3a\u540e\u7aef\u8282\u70b9\uff0c\u53ef\u5728\u4e24\u7aef\u540c\u65f6\u8c03\u4f18\uff0c\u5e76\u914d\u5408 CDN \u6216\u667a\u80fd\u8def\u7531\u964d\u4f4e RTT\u3002<\/li>\n<\/ul>\n<h3>VPN\u3001\u6e38\u620f\u4e0e\u5b9e\u65f6\u901a\u4fe1<\/h3>\n<p>\u5bf9\u5ef6\u8fdf\u654f\u611f\u7684\u5e94\u7528\u9700\u4f18\u5148\u964d\u4f4e\u6296\u52a8\u4e0e\u6392\u961f\u5ef6\u8fdf\uff1a<\/p>\n<ul>\n<li>\u914d\u5408 fq_codel \u6216 cake \u7b49\u961f\u5217\u7ba1\u7406\uff0c\u51cf\u5c11\u7f13\u51b2\u533a\u81a8\u80c0\uff08bufferbloat\uff09\uff1b<\/li>\n<li>\u8c03\u5c0f net.ipv4.tcp_fin_timeout \u5e76\u5408\u7406\u4f7f\u7528 keepalive\uff0c\u907f\u514d\u957f\u65f6\u95f4\u5360\u7528\u7aef\u53e3\uff1b<\/li>\n<li>\u76d1\u63a7\u4e22\u5305\u3001\u91cd\u4f20\u548c RTT\uff0c\u9009\u62e9\u5408\u9002\u7684\u62e5\u585e\u7b97\u6cd5\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u5728\u9999\u6e2f VPS \u4e0a\u505a\u5185\u6838\u5c42\u4f18\u5316 VS \u5728\u7f8e\u56fdVPS\/\u672c\u5730\u7269\u7406\u673a<\/h2>\n<p>\u5728\u9999\u6e2fVPS \u4e0a\u4f18\u5316\u7684\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li>\u5730\u7406\u4f4d\u7f6e\u9760\u8fd1\u4e2d\u56fd\u5185\u5730\u4e0e\u4e1c\u5357\u4e9a\u7528\u6237\uff0c\u5929\u7136\u5ef6\u8fdf\u4f18\u52bf\uff1b<\/li>\n<li>\u6210\u719f\u7684\u4e91\u7f51\u7edc\u4e0e\u5f39\u6027\u6269\u5c55\u80fd\u529b\uff0c\u7ed3\u5408\u5185\u6838\u4f18\u5316\u53ef\u5feb\u901f\u54cd\u5e94\u6d41\u91cf\u5cf0\u503c\uff1b<\/li>\n<\/ul>\n<p>\u76f8\u8f83\u4e8e\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u7f8e\u56fdVPS\uff1a<\/p>\n<ul>\n<li>\u9762\u5411\u7f8e\u6d32\u7528\u6237\u65f6\uff0c\u7f8e\u56fd\u8282\u70b9\u53ef\u4ee5\u964d\u4f4e RTT\uff0c\u4f46\u5bf9\u4e8e\u4e9a\u592a\u7528\u6237\u9999\u6e2f\u8282\u70b9\u66f4\u6709\u4f18\u52bf\uff1b<\/li>\n<li>\u65e0\u8bba\u5730\u57df\uff0c\u5185\u6838\u5c42\u7684\u4f18\u5316\u7b56\u7565\u76f8\u4f3c\uff0c\u4f46\u9700\u6839\u636e\u94fe\u8def\u7279\u6027\uff08\u5e26\u5bbd\u3001\u5ef6\u8fdf\u3001\u4e22\u5305\uff09\u8c03\u6574\u53c2\u6570\uff1b<\/li>\n<li>\u5982\u679c\u4f60\u7684\u6d41\u91cf\u5206\u5e03\u5168\u7403\uff0c\u5efa\u8bae\u91c7\u7528\u591a\u533a\u57df\u90e8\u7f72\uff08\u9999\u6e2f\u670d\u52a1\u5668 + \u7f8e\u56fdVPS\uff09\uff0c\u5e76\u5728\u5404\u8282\u70b9\u505a\u9488\u5bf9\u6027 sysctl \u8c03\u4f18\u3002<\/li>\n<\/ul>\n<h2>\u9009\u8d2d\u5efa\u8bae\uff1a\u9009\u62e9\u6613\u4e8e\u8c03\u4f18\u7684\u9999\u6e2f VPS<\/h2>\n<p>\u5728\u8d2d\u4e70\u9999\u6e2f VPS \u6216\u8005\u6df7\u5408\u90e8\u7f72\uff08\u914d\u5408\u7f8e\u56fdVPS\uff09\u65f6\uff0c\u5173\u6ce8\u4ee5\u4e0b\u8981\u70b9\u6709\u52a9\u4e8e\u53d1\u6325 sysctl \u8c03\u4f18\u6548\u679c\uff1a<\/p>\n<ul>\n<li>\u7f51\u7edc\u5e26\u5bbd\u4e0e\u6700\u5927\u5305\u901f\u7387\uff08pps\uff09\uff1a\u9ad8\u5e76\u53d1\u591a\u77ed\u5305\u573a\u666f\u66f4\u770b\u91cd pps \u800c\u4e0d\u662f\u5355\u7eaf\u5e26\u5bbd\uff1b<\/li>\n<li>\u5185\u5b58\u4e0e CPU\uff1a\u5185\u6838\u7f13\u51b2\u533a\u4e0e\u5e76\u53d1\u5904\u7406\u4f9d\u8d56\u5185\u5b58\u4e0e CPU\uff0c\u5efa\u8bae\u7559\u8db3 headroom\uff1b<\/li>\n<li>\u662f\u5426\u652f\u6301\u81ea\u5b9a\u4e49\u5185\u6838\u53c2\u6570\u4e0e\u5f00\u542f BBR\uff1a\u6709\u4e9b\u6258\u7ba1\u5e73\u53f0\u53ef\u80fd\u9650\u5236\u5185\u6838\u53c2\u6570\u4fee\u6539\uff1b<\/li>\n<li>DDoS \u9632\u62a4\u80fd\u529b\uff1a\u5728\u5f00\u653e\u7aef\u53e3\u4e0e\u589e\u52a0\u5e76\u53d1\u80fd\u529b\u7684\u540c\u65f6\uff0c\u9700\u6709\u9632\u62a4\u63aa\u65bd\u4ee5\u514d\u88ab\u6ee5\u7528\u9020\u6210\u8d44\u6e90\u8017\u5c3d\u3002<\/li>\n<\/ul>\n<h2>\u5b9e\u65bd\u6d41\u7a0b\u4e0e\u76d1\u63a7\u5efa\u8bae<\/h2>\n<p>\u8c03\u4f18\u662f\u4e2a\u8fed\u4ee3\u8fc7\u7a0b\uff0c\u5efa\u8bae\u6309\u4ee5\u4e0b\u6d41\u7a0b\u6267\u884c\uff1a<\/p>\n<ul>\n<li>\u5728\u975e\u751f\u4ea7\u6216\u9884\u53d1\u5e03\u73af\u5883\u9a8c\u8bc1\u4e3b\u8981\u53c2\u6570\u6539\u52a8\uff1b<\/li>\n<li>\u5206\u6279\u4e0a\u7ebf\u5e76\u6301\u7eed\u76d1\u63a7 TCP \u6d3b\u52a8\u3001\u8fde\u63a5\u6570\u3001\u91cd\u4f20\u7387\u3001packet drop \u4e0e CPU\/\u5185\u5b58\u4f7f\u7528\uff1b<\/li>\n<li>\u4f7f\u7528\u5de5\u5177\uff1ass\/iproute2 \u67e5\u770b socket \u72b6\u6001\uff0ctcpdump\/wireshark \u5206\u6790\u4e22\u5305\uff0cnetstat\/ss \u7edf\u8ba1 TIME_WAIT \u7b49\uff1b<\/li>\n<li>\u56de\u6eda\u9608\u503c\u660e\u786e\uff0c\u6bd4\u5982\u51fa\u73b0\u5927\u91cf\u91cd\u4f20\u6216\u5f02\u5e38\u5ef6\u8fdf\u7acb\u5373\u56de\u9000\u5e76\u5206\u6790\u3002<\/li>\n<\/ul>\n<p><strong>\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong>\u907f\u514d\u76f4\u63a5\u7167\u642c\u522b\u4eba\u7684\u914d\u7f6e\uff0c\u5185\u6838\u53c2\u6570\u9700\u8981\u7ed3\u5408\u4f60\u7684\u5e94\u7528\u6a21\u5f0f\u3001\u5e76\u53d1\u7c7b\u578b\u3001\u7f51\u7edc\u8d28\u91cf\u4e0e\u4e3b\u673a\u89c4\u683c\u8fdb\u884c\u8c03\u6574\u3002\u67d0\u4e9b\u53c2\u6570\uff08\u5982 tcp_tw_recycle\uff09\u5728 NAT \u6216 IPv6 \u73af\u5883\u4e0b\u4f1a\u5bfc\u81f4\u95ee\u9898\uff0c\u5e94\u8c28\u614e\u4f7f\u7528\u6216\u907f\u514d\u3002<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u901a\u8fc7 sysctl \u5bf9\u5185\u6838\u7f51\u7edc\u4e0e\u5e76\u53d1\u53c2\u6570\u8fdb\u884c\u9488\u5bf9\u6027\u4f18\u5316\uff0c\u662f\u63d0\u5347\u9999\u6e2f VPS \u5728\u9ad8\u5e76\u53d1\u3001\u8de8\u5883\u8bbf\u95ee\u548c\u5ef6\u8fdf\u654f\u611f\u573a\u666f\u4e2d\u6027\u80fd\u7684\u6709\u6548\u624b\u6bb5\u3002\u5408\u7406\u8bbe\u7f6e socket \u7f13\u51b2\u3001\u961f\u5217\u957f\u5ea6\u3001TCP \u8d85\u65f6\u4e0e\u62e5\u585e\u63a7\u5236\uff0c\u5e76\u914d\u5408\u6587\u4ef6\u53e5\u67c4\u4e0e\u7528\u6237\u6001\u670d\u52a1\u7aef\u53c2\u6570\u7684\u8c03\u4f18\uff0c\u53ef\u4ee5\u663e\u8457\u964d\u4f4e\u8fde\u63a5\u5931\u8d25\u3001\u63d0\u5347\u541e\u5410\u4e0e\u6539\u5584\u7528\u6237\u4f53\u9a8c\u3002\u5bf9\u4e8e\u5168\u7403\u5316\u4e1a\u52a1\uff0c\u53ef\u5728\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fdVPS\/\u7f8e\u56fd\u670d\u52a1\u5668\u4e4b\u95f4\u8fdb\u884c\u7b56\u7565\u6027\u90e8\u7f72\u4e0e\u8c03\u4f18\uff0c\u4ee5\u517c\u987e\u4e0d\u540c\u5730\u533a\u7528\u6237\u7684\u4f53\u9a8c\u3002<\/p>\n<p>\u82e5\u4f60\u5e0c\u671b\u5feb\u901f\u4e0a\u624b\u6216\u8bd5\u9a8c\u4e0a\u8ff0\u914d\u7f6e\uff0c\u53ef\u4ee5\u5148\u5728\u6d4b\u8bd5\u5b9e\u4f8b\u4e2d\u9a8c\u8bc1\uff0c\u7136\u540e\u5c06\u6210\u719f\u65b9\u6848\u90e8\u7f72\u5230\u751f\u4ea7\u73af\u5883\u3002\u66f4\u591a\u5173\u4e8e\u9999\u6e2f VPS \u7684\u4ea7\u54c1\u4fe1\u606f\u4e0e\u8d2d\u4e70\u9009\u9879\uff0c\u53ef\u8bbf\u95ee Server.HK \u7684\u76f8\u5173\u9875\u9762\u4e86\u89e3\u8be6\u60c5\uff1a<\/p>\n<p><a href=\"https:\/\/www.server.hk\/cloud.php\" target=\"_blank\">\u9999\u6e2fVPS \u53ca\u4e91\u4e3b\u673a\u4ea7\u54c1<\/a> | <a href=\"https:\/\/www.server.hk\/\" target=\"_blank\">Server.HK \u5b98\u65b9\u7f51\u7ad9<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u9999\u6e2fVPS\u5b9e\u6218\u4e2d\uff0c\u901a\u8fc7 sysctl \u4f18\u5316 \u5185\u6838\u53c2\u6570\uff0c\u4f60\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u7f51\u7edc\u541e\u5410\u4e0e\u5e76\u53d1\u80fd\u529b\uff0c\u51cf\u5c11\u5ef6\u8fdf\u4e0e\u8fde\u63a5\u4e22\u5931\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u4e0e\u5f00\u53d1\u8005\uff0c\u63d0\u4f9b\u6613\u61c2\u7684\u539f\u7406\u89e3\u6790\u3001\u5178\u578b\u914d\u7f6e\u4e0e\u5b9e\u6218\u5efa\u8bae\uff0c\u5e2e\u4f60\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u628a\u9999\u6e2f\u6216\u7f8e\u56fdVPS\u7684\u6027\u80fd\u53d1\u6325\u5230\u6781\u81f4\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4927],"tags":[2606,2605,2610,260,2607,2611,2608,2609],"class_list":["post-209330","post","type-post","status-publish","format-standard","hentry","category-4927","tag-linux-","tag-sysctl-","tag-tcp-","tag-260","tag-2607","tag-2611","tag--vps-","tag-2609"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/209330","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=209330"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/209330\/revisions"}],"predecessor-version":[{"id":209331,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/209330\/revisions\/209331"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=209330"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=209330"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=209330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}