两台unix 系统虚拟机，可以ping通，但是ssh失败

来源：互联网发布：创建表的sql语句编辑：程序博客网时间：2024/06/05 05:37

1.首先确认防火墙关闭

rcSuSEfirewall2 status

Checking the status of SuSEfirewall2 unused

2、检查/etc/ssh/sshd_config文件

若需要修改要重启生效，service sshd restart。

3、检查ssh是否启动

service sshd status

发现没有启动

service sshd start 提示：

    Permissions 0777 for '/etc/ssh/ssh_host_rsa_key' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_rsa_key
Could not load host key: /etc/ssh/ssh_host_rsa_key
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0777 for '/etc/ssh/ssh_host_dsa_key' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_dsa_key
Could not load host key: /etc/ssh/ssh_host_dsa_key
Disabling protocol version 2. Could not load host key
sshd: no hostkeys available -- exiting.
                                                            [FAILED]

4、就需要检查一下/etc/ssh/目录下文件的权限

发现/etc/ssh/下所有文件权限均为777,此时需要做如下修改

#chmod 600 sshd_config ssh_host_dsa_key ssh_host_key ssh_host_rsa_key
#chmod 620 moduli
#chmod 644 ssh_config ssh_host_dsa_key.pub ssh_host_key.pub ssh_host_rsa_key.pub
#service sshd start

\(^o^)/~ 启动正常了。