{"id":44896,"date":"2024-10-06T18:59:25","date_gmt":"2024-10-06T10:59:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/44896\/"},"modified":"2024-10-06T18:59:26","modified_gmt":"2024-10-06T10:59:26","slug":"linux-%e4%b8%8b%e5%a4%a7%e9%87%8f-time_wait-%e7%9a%84%e8%a7%a3%e6%b1%ba%e8%be%a6%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/44896\/","title":{"rendered":"Linux \u4e0b\u5927\u91cf TIME_WAIT \u7684\u89e3\u6c7a\u8fa6\u6cd5"},"content":{"rendered":"<h1 id=\"linux-%e4%b8%8b%e5%a4%a7%e9%87%8f-time_wait-%e7%9a%84%e8%a7%a3%e6%b1%ba%e8%be%a6%e6%b3%95-oLyCeIeXfO\">Linux \u4e0b\u5927\u91cf TIME_WAIT \u7684\u89e3\u6c7a\u8fa6\u6cd5<\/h1>\n<p>\u5728 Linux \u7cfb\u7d71\u4e2d\uff0c\u7576\u4e00\u500b TCP \u9023\u63a5\u95dc\u9589\u5f8c\uff0c\u6703\u9032\u5165\u4e00\u500b\u540d\u70ba TIME_WAIT \u7684\u72c0\u614b\u3002\u9019\u500b\u72c0\u614b\u7684\u4e3b\u8981\u76ee\u7684\u662f\u78ba\u4fdd\u6578\u64da\u5305\u7684\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u820a\u7684\u91cd\u8907\u6578\u64da\u5305\u5f71\u97ff\u65b0\u7684\u9023\u63a5\u3002\u7136\u800c\uff0c\u7576\u7cfb\u7d71\u4e2d\u5b58\u5728\u5927\u91cf\u7684 TIME_WAIT \u72c0\u614b\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u8cc7\u6e90\u6d6a\u8cbb\uff0c\u5f71\u97ff\u7cfb\u7d71\u6027\u80fd\uff0c\u751a\u81f3\u5c0e\u81f4\u65b0\u7684\u9023\u63a5\u7121\u6cd5\u5efa\u7acb\u3002\u672c\u6587\u5c07\u63a2\u8a0e Linux \u4e0b\u5927\u91cf TIME_WAIT \u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u8fa6\u6cd5\u3002<\/p>\n<h2 id=\"time_wait-%e7%9a%84%e5%8e%9f%e5%9b%a0-oLyCeIeXfO\">TIME_WAIT \u7684\u539f\u56e0<\/h2>\n<p>\u5728 TCP \u5354\u8b70\u4e2d\uff0c\u7576\u4e00\u500b\u9023\u63a5\u95dc\u9589\u6642\uff0c\u767c\u9001\u65b9\u6703\u5c07\u5176\u72c0\u614b\u8a2d\u7f6e\u70ba TIME_WAIT\uff0c\u9019\u500b\u72c0\u614b\u901a\u5e38\u6301\u7e8c 2 \u500d\u7684\u6700\u5927\u6bb5\u751f\u5b58\u6642\u9593\uff08MSL\uff09\uff0c\u4ee5\u78ba\u4fdd\u6240\u6709\u7684\u6578\u64da\u5305\u90fd\u80fd\u88ab\u6b63\u78ba\u8655\u7406\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u53ef\u80fd\u5c0e\u81f4\u5927\u91cf TIME_WAIT \u72c0\u614b\u7684\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u983b\u7387\u7684\u9023\u63a5\u5efa\u7acb\u8207\u95dc\u9589\uff1a<\/strong>\u5728\u9ad8\u6d41\u91cf\u7684\u61c9\u7528\u4e2d\uff0c\u7279\u5225\u662f Web \u4f3a\u670d\u5668\uff0c\u7d93\u5e38\u6703\u51fa\u73fe\u5927\u91cf\u7684\u9023\u63a5\u5efa\u7acb\u8207\u95dc\u9589\uff0c\u9019\u6703\u5c0e\u81f4 TIME_WAIT \u72c0\u614b\u7684\u7a4d\u7d2f\u3002<\/li>\n<li><strong>\u77ed\u66ab\u7684\u9023\u63a5\uff1a<\/strong>\u4f7f\u7528 HTTP\/1.0 \u7684\u61c9\u7528\u901a\u5e38\u6703\u5728\u6bcf\u6b21\u8acb\u6c42\u5f8c\u95dc\u9589\u9023\u63a5\uff0c\u9019\u6703\u589e\u52a0 TIME_WAIT \u7684\u6578\u91cf\u3002<\/li>\n<li><strong>\u4e0d\u7576\u7684 TCP \u914d\u7f6e\uff1a<\/strong>\u5982\u679c\u7cfb\u7d71\u7684 TCP \u53c3\u6578\u914d\u7f6e\u4e0d\u7576\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4 TIME_WAIT \u72c0\u614b\u7684\u6578\u91cf\u589e\u52a0\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba-time_wait-%e5%95%8f%e9%a1%8c%e7%9a%84%e6%96%b9%e6%b3%95-oLyCeIeXfO\">\u89e3\u6c7a TIME_WAIT \u554f\u984c\u7684\u65b9\u6cd5<\/h2>\n<p>\u70ba\u4e86\u6e1b\u5c11 TIME_WAIT \u72c0\u614b\u7684\u6578\u91cf\uff0c\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e8%aa%bf%e6%95%b4-tcp-%e5%8f%83%e6%95%b8-oLyCeIeXfO\">1. \u8abf\u6574 TCP \u53c3\u6578<\/h3>\n<p>\u53ef\u4ee5\u901a\u904e\u8abf\u6574 Linux \u7cfb\u7d71\u7684 TCP \u53c3\u6578\u4f86\u6e1b\u5c11 TIME_WAIT \u72c0\u614b\u7684\u6301\u7e8c\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u53c3\u6578\uff1a<\/p>\n<pre><code>echo 30 &gt; \/proc\/sys\/net\/ipv4\/tcp_fin_timeout<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u5c07 TIME_WAIT \u7684\u6301\u7e8c\u6642\u9593\u8a2d\u7f6e\u70ba 30 \u79d2\uff0c\u9ed8\u8a8d\u503c\u901a\u5e38\u70ba 60 \u79d2\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8-tcp-%e9%87%8d%e7%94%a8-oLyCeIeXfO\">2. \u4f7f\u7528 TCP \u91cd\u7528<\/h3>\n<p>TCP \u91cd\u7528\u5141\u8a31\u5728 TIME_WAIT \u72c0\u614b\u7684\u9023\u63a5\u4e0a\u91cd\u7528\u7aef\u53e3\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u555f\u7528\uff1a<\/p>\n<pre><code>echo 1 &gt; \/proc\/sys\/net\/ipv4\/tcp_tw_reuse<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5728 TIME_WAIT \u72c0\u614b\u7684\u9023\u63a5\u4e0a\u91cd\u7528\u7aef\u53e3\uff0c\u5f9e\u800c\u6e1b\u5c11 TIME_WAIT \u7684\u5f71\u97ff\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8-tcp-%e5%bf%ab%e9%80%9f%e9%87%8d%e7%94%a8-oLyCeIeXfO\">3. \u4f7f\u7528 TCP \u5feb\u901f\u91cd\u7528<\/h3>\n<p>TCP \u5feb\u901f\u91cd\u7528\u5141\u8a31\u5728 TIME_WAIT \u72c0\u614b\u7684\u9023\u63a5\u4e0a\u5feb\u901f\u91cd\u7528\u7aef\u53e3\uff0c\u9019\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u555f\u7528\uff1a<\/p>\n<pre><code>echo 1 &gt; \/proc\/sys\/net\/ipv4\/tcp_tw_recycle<\/code><\/pre>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u9019\u500b\u9078\u9805\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u53ef\u80fd\u6703\u5c0e\u81f4\u554f\u984c\uff0c\u56e0\u6b64\u5728\u4f7f\u7528\u6642\u9700\u8b39\u614e\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e6%8c%81%e4%b9%85%e9%80%a3%e6%8e%a5-oLyCeIeXfO\">4. \u4f7f\u7528\u6301\u4e45\u9023\u63a5<\/h3>\n<p>\u5982\u679c\u61c9\u7528\u7a0b\u5e8f\u652f\u6301\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u6301\u4e45\u9023\u63a5\uff08\u5982 HTTP\/1.1 \u7684 Keep-Alive \u529f\u80fd\uff09\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u9023\u63a5\u7684\u5efa\u7acb\u8207\u95dc\u9589\u6b21\u6578\uff0c\u5f9e\u800c\u6e1b\u5c11 TIME_WAIT \u7684\u6578\u91cf\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-oLyCeIeXfO\">\u7e3d\u7d50<\/h2>\n<p>\u5728 Linux \u7cfb\u7d71\u4e2d\uff0c\u5927\u91cf\u7684 TIME_WAIT \u72c0\u614b\u53ef\u80fd\u6703\u5f71\u97ff\u7cfb\u7d71\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u9ad8\u6d41\u91cf\u7684\u74b0\u5883\u4e2d\u3002\u901a\u904e\u8abf\u6574 TCP \u53c3\u6578\u3001\u4f7f\u7528 TCP \u91cd\u7528\u548c\u5feb\u901f\u91cd\u7528\u3001\u4ee5\u53ca\u63a1\u7528\u6301\u4e45\u9023\u63a5\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11 TIME_WAIT \u7684\u5f71\u97ff\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u89e3\u6c7a Linux \u4e0b\u5927\u91cf TIME_WAIT \u554f\u984c\u7684\u65b9\u6cd5\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\uff0c\u512a\u5316\u7db2\u7d61\u9023\u63a5\uff0c\u78ba\u4fdd\u7a69\u5b9a\u904b\u884c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-44896","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/44896","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=44896"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/44896\/revisions"}],"predecessor-version":[{"id":44897,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/44896\/revisions\/44897"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=44896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=44896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=44896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}