``` 安装环境包 yum install policycoreutils-python.x86_64 修改端口号 vim /etc/ssh/sshd_config ```  ``` semanage port -a -t ssh_port_t -p tcp 2222 systemctl restart sshd systemctl stop firewalld systemctl disable firewalld ``` ``` 客户端 useradd WuHanskill20 passwd WuHanskill20 su - WuHanskill20 ssh-keygen -t rsa #创建一个公钥 选项全部默认 ls -a .ssh #密钥存放位置 ssh-copy-id root@192.168.10.2 -p 2222 #复制到服务端 su - root systemctl stop firewalld systemctl disable firewalld ssh-copy-id root@192.168.10.2 -p 2222 su -WuHanskill20 ssh-copy-id root@192.168.10.2 -p 2222 ``` ``` 服务端 仅允许client客户端ssh访问 vim /etc/hosts.allow sshd:192.168.10.1:allow ```  ``` 然后去配置拒绝所有 vim /etc/hosts.deny sshd:all ```