DNS从服务的搭建

一、安装

 [root@localhost~]# yum install bind

二、修改主配置文件

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

将以下三行注释掉

//               listen-on port 53 { 127.0.0.1; };
//               listen-on-v6 port 53 { ::1; };
//               allow-query     { localhost; };

三、将DNS指向本机

[root@localhost~]# vim /etc/resolv.conf;generated by /sbin/dhclient-scriptnameserver 192.168.1.107

四、在/etc/named.rfc1912.zones文件中定义从属的域

zone"test.com" IN {type slave;file "slave/test.com.zone";masters { 192.168.1.109; };

检查配置文件

[root@localhost~]# named-checkconf

五、修改主DNS服务器的/var/named/test.com.zone文件，添加从服务器信息

               IN              NS               ns2
ns2            IN              A                192.168.1.107

保存退出

检查配置文件

[root@localhost~]#named-checkzone  “test.com”  test.com.zone
[root@localhost~]#rndc reload
[root@localhost~]#dig  –t  NS  test.com;<<>> DiG 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 <<>> -tNS test.com
;; globaloptions: +cmd
;; Got answer:
;;->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19243
;; flags: qr aard ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 2;; QUESTION SECTION:
;test.com.                      IN      NS;; ANSWERSECTION:
test.com.               600     IN     NS      ns2.test.com.
test.com.               600     IN     NS      dns.test.com.;; ADDITIONALSECTION:
dns.test.com.           600     IN     A       192.168.1.103
ns2.test.com.           600     IN     A       192.168.1.107

六、启动从服务器DNS服务

[root@localhost~]# service named start
Generating/etc/rndc.key:[  OK  ]
Starting named:[  OK ]

启动成功后，发现在/var/named/slaves文件夹下有个test.com.zone文件

[root@localhostslaves]# ls
test.com.zone

该文件就是从主服务器同步过来的

七、完成一次同步传输

[root@localhost~]# dig -t axfr test.com @192.168.1.103;<<>> DiG 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 <<>> -taxfr test.com @192.168.1.103
;; globaloptions: +cmd
test.com.               600     IN     SOA     dns.test.com.admin.test.com. 2014061601 7200 600 604800 21600
test.com.               600     IN     NS      dns.test.com.
test.com.               600     IN     NS      ns2.test.com.
test.com.               600    IN      MX      10 mail.test.com.
dns.test.com.           600    IN      A      192.168.1.103
ftp.test.com.           600     IN     CNAME   www.test.com.
imap.test.com.          600     IN     A       192.168.1.101
mail.test.com.          600     IN     A       192.168.1.103
ns2.test.com.           600     IN     A       192.168.1.107
www.test.com.           600     IN     A       192.168.1.100
www.test.com.           600     IN     A       192.168.1.102
test.com.               600     IN     SOA     dns.test.com.admin.test.com. 2014061601 7200 600 604800 21600