# rpm -qa | grep bind
            

options {
            directory “/var/named”;    //定义区域文件所在的目录
            };
            zone “.” IN {              //顶级域名服务器区域文件名称
            type hint;
            file “named.ca”;
            };
            zone “localhost” IN {       //本机地址正向解析
            type master;              //DNS服务器的类型分主与辅助两种
            file “localhost.zone”;
            allow-update {none};
            };
            zone  “0.0.127.in-addr.arpa IN {    //本机地址反向解析
            type master;
            allow-update{none};
            file  “named.local”;
            };