centos 7.6 DNS——别名解析、泛域名解析、邮件交换

步骤一：安装bind dns应用程序，修改主配置文件

yum -y install bind
[root@localhost etc]# rpm -qc bind
/etc/logrotate.d/named
/etc/named.conf
/etc/named.iscdlv.key
/etc/named.rfc1912.zones
/etc/named.root.key
/etc/rndc.conf
/etc/rndc.key
/etc/sysconfig/named
/var/named/named.ca
/var/named/named.empty
/var/named/named.localhost
/var/named/named.loopback
[root@localhost etc]# vi /etc/named.conf

步骤二：修改区域配置文件

vi /etc/named.rfc1912.zones

cp -p /var/named/named.hostlocal /var/named/ttyy.com.zone      //新建区域数据配置文件
[root@localhost named]# vim /var/named/ttyy.com.zone 
[root@localhost named]# systemctl restart named
[root@localhost named]# echo "nameserver 192.168.75.137" > /etc/resolv.conf   //主机地址作为DNS地址，用来解析本机域名
[root@localhost named]# host mail.ttyy.com   //解析邮件域名ip地址
mail.ttyy.com has address 8.8.8.8
[root@localhost named]# host www.ttyy.com
www.ttyy.com has address 7.7.7.7
[root@localhost named]# host smtp.ttyy.com   //解析别名域名
smtp.ttyy.com is an alias for mail.ttyy.com.
mail.ttyy.com has address 8.8.8.8
[root@localhost named]# host abc.ttyy.com     //当输入错误的域名，泛域名地址就发挥作用
abc.ttyy.com has address 6.6.6.6
[root@localhost named]# 

步骤三： 区域数据配置文件