• netstat


    netstat再解读

    C:UsersAdministrator>netstat -nb
    
    活动连接
    
      协议  本地地址          外部地址        状态
      TCP    127.0.0.1:3306         127.0.0.1:4112         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4113         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4114         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4115         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4116         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4117         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4118         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4119         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4120         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4121         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4122         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4123         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4124         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4125         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4126         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4127         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4128         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4129         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4130         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4131         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4132         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4133         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4134         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4135         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4136         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4137         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4138         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4139         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4140         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:3306         127.0.0.1:4142         ESTABLISHED
     [mysqld.exe]
      TCP    127.0.0.1:4108         127.0.0.1:4109         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4109         127.0.0.1:4108         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4112         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4113         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4114         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4115         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4116         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4117         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4118         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4119         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4120         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4121         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4122         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4123         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4124         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4125         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4126         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4127         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4128         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4129         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4130         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4131         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4132         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4133         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4134         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4135         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4136         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4137         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4138         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4139         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4140         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    127.0.0.1:4142         127.0.0.1:3306         ESTABLISHED
     [javaw.exe]
      TCP    192.168.4.123:2069     64.233.189.188:5228    ESTABLISHED
     [chrome.exe]
      TCP    192.168.4.123:2912     163.177.90.147:80      ESTABLISHED
     [QQ.exe]
      TCP    192.168.4.123:2948     58.250.11.114:80       CLOSE_WAIT
     [QQ.exe]
      TCP    192.168.4.123:3154     209.135.140.128:443    CLOSE_WAIT
     [javaw.exe]
      TCP    192.168.4.123:3179     112.90.78.141:8080     ESTABLISHED
     [QQBrowser.exe]
      TCP    192.168.4.123:4224     163.177.93.234:80      CLOSE_WAIT
     [TsService.exe]
      TCP    192.168.4.123:4231     202.89.233.103:80      ESTABLISHED
     [chrome.exe]
      TCP    192.168.4.123:4237     163.177.68.215:80      CLOSE_WAIT
     [QQ.exe]
      TCP    192.168.4.123:4238     163.177.93.234:80      ESTABLISHED
     [QQBrowser.exe]
      TCP    192.168.4.123:4239     163.177.93.236:80      ESTABLISHED
     [QQBrowser.exe]
      TCP    192.168.4.123:4241     163.177.73.177:80      ESTABLISHED
     [QQBrowser.exe]

    可见, mysql都是 3306端口,但是与本地的java程序建立了很多的连接。。。

    另外,chrome/QQBrowser/qq也打开了几个本地端口,

    这些都是tcp连接,因为默认是TCP

    第一行是协议,第二行是本地地址,—— ip + 端口,ip一般为  127.0.0.1或本机的局域网ip之一,区别? 另外也有ipv6的格式出现: 0:0:0:0::xxxxx等,而绝不可能出现其他ip,另外需要 注意观察主要的服务端口: http web服务器 80,8080,mysql 3306,ftp/sftp( 23 ,22) , oracle 数据库 1521 ,邮件端口(POP3 收邮件 110 995 IMAP 收邮件 143 993 SMTP 发邮件 25)等即可。

    第三行是远程端口—— 这个远程地址,是相对而言的,实际上也可以是本地ip+端口,因为,我们存储需要本地客户端访问本机服务器的情况。 比如 本地java 访问本地 mysql 等等

    第四行是连接状态,主要有:

     LISTEN:侦听来自远方的TCP端口的连接请求

    SYN-SENT:再发送连接请求后等待匹配的连接请求

    SYN-RECEIVED:再收到和发送一个连接请求后等待对方对连接请求的确认

    ESTABLISHED:代表一个打开的连接

    FIN-WAIT-1:等待远程TCP连接中断请求,或先前的连接中断请求的确认

    FIN-WAIT-2:从远程TCP等待连接中断请求

    CLOSE-WAIT:等待从本地用户发来的连接中断请求

    CLOSING:等待远程TCP对连接中断的确认

    LAST-ACK:等待原来的发向远程TCP的连接中断请求的确认

    TIME-WAIT:等待足够的时间以确保远程TCP接收到连接中断请求的确认

    CLOSED:没有任何连接状态

    参数解析:

    a all

    n non name, but digit

    b show name below

    o pid

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  • 原文地址:https://www.cnblogs.com/FlyAway2013/p/5188788.html
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