{"id":18401,"date":"2024-11-18T14:19:57","date_gmt":"2024-11-18T06:19:57","guid":{"rendered":"https:\/\/fwq.ai\/blog\/18401\/"},"modified":"2024-11-18T14:19:57","modified_gmt":"2024-11-18T06:19:57","slug":"linux%e6%9f%a5%e7%9c%8b%e5%8d%8a%e8%bf%9e%e6%8e%a5%e6%98%af%e5%93%aa%e4%b8%aa%e8%bf%9b%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/18401\/","title":{"rendered":"linux\u67e5\u770b\u534a\u8fde\u63a5\u662f\u54ea\u4e2a\u8fdb\u7a0b"},"content":{"rendered":"<blockquote><p>\n  \u5728 linux \u4e2d\uff0c\u67e5\u770b\u534a\u8fde\u63a5\u5bf9\u5e94\u7684\u8fdb\u7a0b\u7684\u65b9\u6cd5\u5982\u4e0b\uff1a\u4f7f\u7528 netstat \u547d\u4ee4\u627e\u51fa\u534a\u8fde\u63a5\u7684\u7aef\u53e3\u3002\u4f7f\u7528 lsof \u547d\u4ee4\u5217\u51fa\u4f7f\u7528\u8be5\u7aef\u53e3\u7684\u8fdb\u7a0b\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202408\/17\/2024081719095798141.jpg\" class=\"aligncenter\" title=\"linux\u67e5\u770b\u534a\u8fde\u63a5\u662f\u54ea\u4e2a\u8fdb\u7a0b\u63d2\u56fe\" alt=\"linux\u67e5\u770b\u534a\u8fde\u63a5\u662f\u54ea\u4e2a\u8fdb\u7a0b\u63d2\u56fe\" \/><\/p>\n<p><strong>Linux \u4e2d\u67e5\u770b\u534a\u8fde\u63a5\u5bf9\u5e94\u7684\u8fdb\u7a0b<\/strong><\/p>\n<p>\u5728 Linux \u7cfb\u7edf\u4e2d\uff0c\u534a\u8fde\u63a5\uff08HALF-CONN\uff09\u72b6\u6001\u8868\u793a\u5ba2\u6237\u7aef\u5df2\u53d1\u9001 SYN \u8bf7\u6c42\uff0c\u4f46\u5c1a\u672a\u6536\u5230\u670d\u52a1\u5668\u7684 SYN-ACK \u54cd\u5e94\u3002\u8981\u67e5\u770b\u4e0e\u534a\u8fde\u63a5\u5173\u8054\u7684\u8fdb\u7a0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n<p><strong>1. \u67e5\u770b\u534a\u8fde\u63a5\u7684\u7aef\u53e3<\/strong><\/p>\n<p>\u4f7f\u7528 netstat \u547d\u4ee4\u5217\u51fa\u6240\u6709\u7f51\u7edc\u8fde\u63a5\uff0c\u5e76\u8fc7\u6ee4\u51fa\u5904\u4e8e\u534a\u8fde\u63a5\u72b6\u6001\u7684\u8fde\u63a5\uff1a<\/p>\n<pre>netstat -an | grep \"ESTAB\"<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u793a\u4f8b\u8f93\u51fa\uff1a<\/p>\n<pre>tcp        0      0 127.0.0.1:22         127.0.0.1:53230       ESTABLISHED\ntcp        0      0 127.0.0.1:53230       127.0.0.1:22         ESTABLISHED\ntcp        0      0 ::1:53230            ::1:22               ESTABLISHED\ntcp        0      0 ::1:22               ::1:53230            ESTABLISHED<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 lsof \u67e5\u627e\u8fdb\u7a0b<\/strong><\/p>\n<p>\u4f7f\u7528 lsof \u547d\u4ee4\u5217\u51fa\u4f7f\u7528\u7279\u5b9a\u7aef\u53e3\u7684\u8fdb\u7a0b\uff1a<\/p>\n<pre>lsof -i :&lt;port&gt;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d \u662f\u4ece\u6b65\u9aa4 1 \u4e2d\u83b7\u5f97\u7684\u534a\u8fde\u63a5\u7aef\u53e3\u53f7\u3002 <\/p>\n<p>\u793a\u4f8b\u8f93\u51fa\uff1a<\/p>\n<pre>COMMAND     PID USER   FD      TYPE             DEVICE SIZE\/OFF NODE NAME\nsshd        629 root    4u  IPv6 3850116765       0t0  TCP *:22 (LISTEN)\nsshd        629 root    4u  IPv4 3854596615       0t0  TCP *:22 (LISTEN)\nsshd        717 root   12u  IPv4 3849900729       0t0  TCP 127.0.0.1:53230-&gt;127.0.0.1:22 (ESTABLISHED)\nsshd        733 root   11u  IPv4 3849900738       0t0  TCP 127.0.0.1:22-&gt;127.0.0.1:53230 (ESTABLISHED)\nsshd        749 root   10u  IPv6 3850116766       0t0  TCP ::1:22-&gt;::1:53230 (ESTABLISHED)\nsshd        765 root    9u  IPv6 3850116767       0t0  TCP ::1:53230-&gt;::1:22 (ESTABLISHED)<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u793a\u4f8b\u8f93\u51fa\u4e2d\uff0c\u53ef\u4ee5\u627e\u5230\u4e0e\u534a\u8fde\u63a5\u7aef\u53e3\u5173\u8054\u7684\u8fdb\u7a0b\u7684 PID\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u662f PID \u4e3a 717 \u7684 sshd \u8fdb\u7a0b\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u67e5\u770b\u534a\u8fde\u63a5\u662f\u54ea\u4e2a\u8fdb\u7a0b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 linux \u4e2d\uff0c\u67e5\u770b\u534a\u8fde\u63a5\u5bf9\u5e94\u7684\u8fdb\u7a0b\u7684\u65b9\u6cd5\u5982\u4e0b\uff1a\u4f7f\u7528 netstat \u547d\u4ee4\u627e\u51fa\u534a\u8fde\u63a5\u7684\u7aef\u53e3\u3002\u4f7f\u7528 lsof \u547d\u4ee4\u5217\u51fa\u4f7f\u7528\u8be5\u7aef\u53e3\u7684\u8fdb\u7a0b\u3002 Linux \u4e2d\u67e5\u770b\u534a\u8fde\u63a5\u5bf9\u5e94\u7684\u8fdb\u7a0b \u5728 Linux \u7cfb\u7edf\u4e2d\uff0c\u534a\u8fde\u63a5\uff08HALF-CONN\uff09\u72b6\u6001\u8868\u793a\u5ba2\u6237\u7aef\u5df2\u53d1\u9001 SYN \u8bf7\u6c42\uff0c\u4f46\u5c1a\u672a\u6536\u5230\u670d\u52a1\u5668\u7684 SYN-ACK \u54cd\u5e94\u3002\u8981\u67e5\u770b\u4e0e\u534a\u8fde\u63a5\u5173\u8054\u7684\u8fdb\u7a0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a 1. \u67e5\u770b\u534a\u8fde\u63a5\u7684\u7aef\u53e3 \u4f7f\u7528 netstat \u547d\u4ee4\u5217\u51fa\u6240\u6709\u7f51\u7edc\u8fde\u63a5\uff0c\u5e76\u8fc7\u6ee4\u51fa\u5904\u4e8e\u534a\u8fde\u63a5\u72b6\u6001\u7684\u8fde\u63a5\uff1a netstat -an | grep &#8220;ESTAB&#8221; \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b\u8f93\u51fa\uff1a tcp 0 0 127.0.0.1:22 127.0.0.1:53230 ESTABLISHED tcp 0 0 127.0.0.1:53230 127.0.0.1:22 ESTABLISHED tcp 0 0 ::1:53230 ::1:22 ESTABLISHED tcp 0 0 ::1:22 ::1:53230 ESTABLISHED \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-18401","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/18401","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=18401"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/18401\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=18401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=18401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=18401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}