Linux DNS Subdomain Authorization

A zone may have primary DNS, from DNS, subdomain DNS, this section with the primary DNS authorization subdomain for example explained.

Subdomain Authorization configuration process:

1. Edit the primary DNS forward zone file

[[email protected] named]# vim dove.com.zone     #编辑主DNS正向区域文件 $TTL     600@       IN       soa     dove.com.       admin.dove.com.  (            2015041802    #由于有从DNS服务器, Therefore, each modification of the serial number must be added one                 2H                 5M                 3D                 1D )          in      ns       dns         in      ns       slave         IN      MX 9      maildns       IN      A        192.168.8.7mail      IN       A       192.168.8.8www        in      a       192.168.8.8web        IN      CNAME      wwwSlave      IN      A        192.168.8.9                              #中间空行表示不继承前面区域名称dep1        in      ns     dns.dep1   # Add subdomain dns ns records in primary DNS dns.dep1    in      a      192.168.8.10  #在主DNS添加子域DNS   corresponding a record

[[email protected] ~]# yum -y install  bind     #安装bind包/etc/logrotate.d/named        /etc /named.conf         #主配置文件/etc/named.iscdlv.key       #bind密钥文件/etc/named.rfc1912.zones     #区域配置文件 (included in the main profile with the include Directive)/etc/named.root.key        #根区域key文件以实现事务签名/etc/rndc.conf           #rndc (remote name server Controller) configuration file/etc/rndc.key          #rndc加密密钥/ etc/sysconfig/named       #bind进程选项/var/named/named.ca        #全球13个根服务器存放文件/var/named/named.empty/var/named/named.localhost    #本地正向解析区域文件/var/ named/named.loopback    #本地反向解析区域文件 

3. Edit the Master profile, commenting the relevant options

[[email protected] named]# vim/etc/named.conf #编辑主配置文件, use double slash note below three items

Options {

// listen-on port 53 {127.0.0.1;}; #注释只本地监听端口

// Listen-on-v6 port 53 {:: 1;}; #注释IPV6监听端口

Directory "/var/named";

Dump-file "/var/named/data/cache_dump.db";

Statistics-file "/var/named/data/named_stats.txt";

Memstatistics-file "/var/named/data/named_mem_stats.txt";

// allow-query {localhost;}; #注释只允许本地请求

4. Edit the subdomain zone configuration file

[[email protected] named]# vim/etc/named.rfc1912.zones #编辑配置文件, add subdomain area Zone "dep1.dove.com" in {type Master; File "Dep1.dove.com.zone";};

5. Create a Subdomain zone resolution file

[[email protected] named]# vim dep1.dove.com.zone      #编辑子域区域解析文件 $TTL     600@       IN       SOA     dep1.dove.com.  admin.dep1.dove.com.  (                 2015042101                 2H                 5M                 3D                 2H )         IN       NS      dns         #添加子域NS记录dns        IN      A        192.168.8.10   #添加子域对应A记录www        IN       A       192.168.8.11[[email protected]  named]# chmod 640 dep1.dove.com.zone      #修改区域文件权限 [[email  protected] named]# chown :named  dep1.dove.com.zone    #修改区域文件属组

6, dig tool test parsing

[[email protected] named]# setenforce 0           #关闭selinux to prevent synchronization failures [[email protected] named]# service iptables stop      #停止iptables服务 to prevent synchronization failures [[email protected] named]# dig -t a  www.dep1.dove.com   #使用主DNS解析子域上一台主机成功; <<>> dig  9.8.2rc1-redhat-9.8.2-0.30.rc1.el6 <<>> -t a www.dep1.dove.com;;  global options: +cmd;;  Got answer:;;  ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52525;;  flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1,  additional: 0;;  QUESTION SECTION:;www.dep1.dove.com.INA;;  ANSWER SECTION:www.dep1.dove.com.600INA192.168.8.11;;  AUTHORITY SECTION:dep1.dove.com.600INNSdns.dep1.dove.com.;;  query time: 738 msec;;  server: 192.168.8.7#53 (192.168.8.7);  WHEN: Tue Apr 21 21:08:31 2015;;  msg size  rcvd: 69

[[email protected] slaves]# cat dove.com.zone     #查看从DNS服务器, sync successfully from master server $origin . $TTL  600; 10 minutesdove.comin soadove.com.  admin.dove.com.  (2015041802; serial7200   ; refresh  (2 hours) 300     ; retry  (5 minutes) 259200  ; expire  (3 days) 86400   ; minimum  (1 day)) nsdns.dove.com.nsslave.dove.com.mx   9  mail.dove.com. $ORIGIN  dove.com.dep1nsdns.dep1$origin dep1.dove.com.dnsa192.168.8.10$origin  dove.com.                    $ORIGIN define the area name dnsa192.168.8.7maila192.168.8.8slavea192.168.8.9webcnamewwwwwwa192.168.8.8 

The end! This completes the Linux subdomain authorization configuration.

Linux DNS Subdomain Authorization