root@server \~# setenforce 0
root@server \~# systemctl stop firewalld
root@server \~# yum install bind -y
vim /etc/named.conf
vim /var/named/named.openlab.com 
nslookup www.openlab.com
Server: 192.168.71.133.
Address: 192.168.71.133#22
Name: www.openlab.com
Address: 192.168.71.133
从服务器
vim /etc/named.conf
