ubuntu15.10允许ssh远程登录(开通22端口)

当我们安装好ubuntu,用ssh远程登录时,会出现如下错误。

[c:\~]$ ssh 192.168.142.84
Connecting to 192.168.142.84:22...
Could not connect to '192.168.142.84' (port 22): Connection failed.

Type `help' to learn how to use Xshell prompt.

错误显示,该IP地址的22端口连接失败。


解决方法如下:

(1)关闭防火墙,执行sudo ufw disable

nii@nii:~$ sudo ufw disable
[sudo] password for nii: 
Firewall stopped and disabled on system startup

(2)安装OpenSSH,执行sudo apt-get install openssh-server openssh-client命令。

(3)执行netstat -tnl命令,查看22端口是否开通。

nii@nii:~$ netstat -tnl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 127.0.1.1:53            0.0.0.0:*               LISTEN     
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN     
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN     
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN     
tcp6       0      0 :::22                   :::*                    LISTEN     
tcp6       0      0 ::1:631                 :::*                    LISTEN 
倒数第二行可以看到22端口已经处于LISTEN状态




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