配置Linux服务器SSH远程密钥登录

2015年1月13日 3233点热度 0人点赞 0条评论

实现目的：

1、配置普通账号通过密钥验证远程SSH登录服务器

2、禁用root账号通过远程SSH登录服务器

3、禁用所有账号通过密码验证远程SSH登录服务器

具体操作：

使用root来示例

1、生成ssh密钥

Last login: Tue Jan 13 09:04:53 2015 from 192.168.16.107
[root@wlzs ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):  
Enter passphrase (empty for no passphrase):     <font color="#ff0000">#在此输入通行短语</font>
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
42:d4:6c:1e:2f:a5:f7:93:ac:ad:5a:1b:49:57:89:5b root@wlzs.com
The key's randomart image is:
+--[ RSA 2048]----+
|      .o         |
|     .  = .  . . |
|      .o =  . E  |
|     .  + o  +   |
|      . So.oo.   |
|       . . o=    |
|          +o .   |
|         ..o.    |
|        ..o.     |
+-----------------+

Last login: Tue Jan 13 09:04:53 2015 from 192.168.16.107

[root@wlzs ~]# ssh-keygen -t rsa

Generating public/private rsa key pair.

Enter file in which to save the key (/root/.ssh/id_rsa):

Enter passphrase (empty for no passphrase): <font color="#ff0000">#在此输入通行短语</font>

Enter same passphrase again:

Your identification has been saved in /root/.ssh/id_rsa.

Your public key has been saved in /root/.ssh/id_rsa.pub.

The key fingerprint is:

42:d4:6c:1e:2f:a5:f7:93:ac:ad:5a:1b:49:57:89:5b root@wlzs.com

The key's randomart image is:

+--[ RSA 2048]----+

| .o |

| . = . . . |

| .o = . E |

| . + o + |

| . So.oo. |

| . . o= |

| +o . |

| ..o. |

+-----------------+

2、创建验证文件（authorized_keys）

[root@wlzs ~]# cd .ssh/
[root@wlzs .ssh]# ls
id_rsa  id_rsa.pub
[root@wlzs .ssh]# mv id_rsa.pub authorized_keys

[root@wlzs ~]# cd .ssh/

[root@wlzs .ssh]# ls

id_rsa id_rsa.pub

[root@wlzs .ssh]# mv id_rsa.pub authorized_keys

3、将生成的验证文件下载到主机

[root@wlzs .ssh]# sz id_rsa 
rz
 zmodem trl+C ?   100%       1 KB    1 KB/s 00:00:01       0 Errors

[root@wlzs .ssh]# sz id_rsa

zmodem trl+C ? 100% 1 KB 1 KB/s 00:00:01 0 Errors

4、使用secure crt连接

快速连接----写上主机名-----用户名------将公钥移到最顶端-----点选公钥------属性

使用会话公钥设置-----找到下载的id_rsa文件-----确定

5、连接时，输入通行短语即可

二〇一五年一月十三日 10:40:45

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