1 添加A、CNAME、MX、PTR记录
以下操作都在 Master DNS 上做操作：
增加一条 A 记录 和 一条 MX 记录：
- a A 192.168.122.100
- mx MX 5 192.168.122.101
# 如下：
[root@ns-master ~]# tail -2 /var/named/chroot/etc/example.com.zone
a A 192.168.122.100
mx MX 5 192.168.122.101
# 重新加载区域文件
[root@ns-master ~]# rndc reload
WARNING: key file (/etc/rndc.key) exists, but using default configuration file (/etc/rndc.conf)
server reload successful
# 检查增加的 DNS 记录
[root@ns-master ~]# dig @192.168.56.13 a.example.com
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.47.rc1.el6 <<>> @192.168.56.13 a.example.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49576
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1
;; QUESTION SECTION:
;a.example.com. IN A
;; ANSWER SECTION:
a.example.com. 3600 IN A 192.168.122.100 # 查询到了 a.example.com 的 A 记录
;; AUTHORITY SECTION:
example.com. 3600 IN NS op.example.com.
;; ADDITIONAL SECTION:
op.example.com. 3600 IN A 1.2.3.4
;; Query time: 1 msec
;; SERVER: 192.168.56.13#53(192.168.56.13)
;; WHEN: Fri Jul 8 23:44:35 2016
;; MSG SIZE rcvd: 80
[root@ns-master ~]# dig @192.168.56.13 mx.example.com
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.47.rc1.el6 <<>> @192.168.56.13 mx.example.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60566
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;mx.example.com. IN A
;; AUTHORITY SECTION:
example.com. 3600 IN SOA op.example.com. dns.example.com. 2000 900 600 86400 3600 # 并没有立即查询到 mx.example.com 的 和 MX 记录
;; Query time: 1 msec
;; SERVER: 192.168.56.13#53(192.168.56.13)
;; WHEN: Fri Jul 8 23:44:50 2016
;; MSG SIZE rcvd: 75
[root@ns-master ~]# host mx.example.com 192.168.56.13
Using domain server:
Name: 192.168.56.13
Address: 192.168.56.13#53
Aliases:
mx.example.com mail is handled by 5 192.168.122.101.example.com. # host 命令可以查询到 mx.example.com 的 和 MX 记录
2 配置反向解析
2.1 view.conf 配置文件中增加反向解析区域配置
内容如下：
[root@ns-master ~]# cat /var/named/chroot/etc/view.conf
view "View" {
zone "example.com" {
type master;
file "example.com.zone";
allow-transfer {
192.168.56.14;
};
notify yes;
also-notify {
192.168.56.14;
};
};
zone "168.192.in-addr.arpa" { # 从此处开始，增加反向解析区域配置
type master;
file "168.192.zone";
allow-transfer {
192.168.56.14;
};
notify yes;
also-notify {
192.168.56.14;
};
}; # 此处结束
};
2.2 增加反向解析区域文件
内容如下：
[root@ns-master ~]# cat /var/named/chroot/etc/168.192.zone
$TTL 3600 ; 1 hour
@ IN SOA op.example.com. dns.example.com. (
2004 ; serial
900 ; refresh (15 minutes)
600 ; retry (10 minutes)
86400 ; expire (1 day)
3600 ; minimum (1 hour)
)
NS op.example.com.
102.122 IN PTR a.example.com.
# 修改区域文件属主
[root@ns-master ~]# chown named.named /var/named/chroot/etc/168.192.zone
[root@ns-master ~]# rndc reload
# 使用 host 命令测试反向解析
[root@ns-master ~]# host 192.168.122.102 192.168.56.13
Using domain server:
Name: 192.168.56.13
Address: 192.168.56.13#53
Aliases:
102.122.168.192.in-addr.arpa domain name pointer a.example.com.
3 主从DNS下，Slave DNS 服务器 view.conf 配置文件增加反向解析区域配置
[root@ns-slave ~]# cat /var/named/chroot/etc/view.conf
view "SlaveView" {
zone "example.com" {
type slave;
masters {192.168.56.13; };
file "slave.example.com.zone";
};
zone "168.192.in-addr.arpa" {
type slave;
masters {192.168.56.13; };
file "slave.168.192.zone";
};
};
[root@ns-slave ~]# rndc reload
WARNING: key file (/etc/rndc.key) exists, but using default configuration file (/etc/rndc.conf)
server reload successful
# 使用 host 命令测试反向解析
[root@ns-slave ~]# host 192.168.122.102 192.168.56.14
Using domain server:
Name: 192.168.56.14
Address: 192.168.56.14#53
Aliases:
102.122.168.192.in-addr.arpa domain name pointer a.example.com.
