DNS 域名系统服务器

IP 与 域名之间解析 ；提供分层的域名解析 服务；
bing 伯克利加州大学 应用最广的域名服务系统；

bind 主要分为 主配置文件 和 域数据记录文件

yum 安装：

yum install bind* -y

配置NDS 域名解析
直接添加一下内容:

[root@mail ~]# cat /etc/named.conf

zone "wangxiaojing.com" IN {
type master;
file "wangxiaojing.com.zone";
allow-update{none;};
};

zone "11.168.192.in-addr.arpa" IN {
type master;
file "11.168.192.local";
allow-update{none;};
};

正向解析 配置

[root@mail ~]# cat /var/named/wangxiaojing.com.zone 
$TTL 1D
@    IN SOA    @ dns.wangxiaojing.com. (
0    ; serial
1D    ; refresh
1H    ; retry
1W    ; expire
3H )    ; minimum
NS    @
A    127.0.0.1
AAAA    ::1
IN NS dns.wangxiaojing.com.
IN MX 10 dns.wangxiaojing.com.
dns IN A 172.16.2.18
mail IN CNAME dns
pop3 IN CNAME dns
smtp IN CNAME dns
imap4 IN CNAME dns

配置反向解析

[root@mail ~]# cat /var/named/11.168.192.local 
$TTL 1D
@    IN SOA    @ dns.wangxiaojing.com. (
0    ; serial
1D    ; refresh
1H    ; retry
1W    ; expire
3H )    ; minimum
NS    @
A    127.0.0.1
AAAA    ::1
IN NS dns.wangxiaojing.com.
18 IN PTR dns.wangxiaojing.com.

设置开机自启动

chkconfig named on
service named start

配置 /etc/resolv.conf
（重启之后配置会失效）

cat /etc/resolv.conf search wangxiaojing.com
nameserver 172.16.2.18
nameserver 8.8.8.8
nameserver 8.8.4.4

检测 NDS 解析：

[root@mail ~]# nslookup -qt=mx mail.wangxiaojing.com
*** Invalid option: qt=mx
Server:    172.16.2.18
Address:    172.16.2.18#53

mail.wangxiaojing.com    canonical name = dns.wangxiaojing.com.
Name:    dns.wangxiaojing.com
Address: 172.16.2.18