DNS主从服务器配置

主从服务器配置：

（1）完全区域传送：复制整个区域文件

#主DNS服务器的配置【主dns服务器的ip地址为192.168.168.129】

#编辑DNS系统配置信息（我这里写的增加的信息，源文件里面有很多内容）

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

options {

listen-on port 53 { 192.168.168.129; };

directory       "/var/named";

allow-transfer { 192.168.168.137; }; #从服务器地址

};

#正解析区域

zone "baidu.com" IN {
type master;
file "baidu";
};

#反解析区域

#例如IP为192.168.168.129，这里就要写16.168.192.in-addr.arpa（反过来写）

zone "168.168.192.in-addr.arpa" IN {
type master;
file "named.192.168.168";
};

#编辑正向解析配置文件

[root@localhost ~]# vim /var/named/baidu

$TTL 1D

@       IN SOA @ admin.admin.com. ( 2024011400 1D 1H 3H 1D )

          IN   NS   dns.baidu.com.

dns     IN   A    192.168.168.129

www IN   A    192.168.168.111

ftp     IN   A    192.168.168.123

a        IN   A    192.168.168.100

aaa     IN CNAME a

#重启服务

[root@localhost ~]# systemct restart named

#从DNS服务器的配置【从dns服务器的ip地址为192.168.168.137】

#安装DNS对应工具

[root@localhost ~]# yum install bind -y

#编辑DNS系统配置文件

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

options {

listen-on port 53 { 192.168.168.129; };

directory       "/var/named";

};

zone "baidu.com" IN {

        type slave;

        file "slaves/named.baidu.com";

        masters {192.168.168.129;};

};

#重启服务

[root@localhost ~]# systemct restart named

#测试（从服务器上）

[root@localhost ~]# nslookup

>server 192.168.168.129

> 192.168.168.100

100.168.168.192.in-addr.arpa    name = a.baidu.com.

> 192.168.168.111

111.168.168.192.in-addr.arpa    name = www.baidu.com.

>

#正向反向解析成功

#查看从服务器获取主服务器的解析文件（是乱码）

[root@192 ~]# cat /var/named/slaves/baidu

e▒▒QQ▒

      baiducom0baiducomadminadmincomx▒▒Q▒*0Q▒0Q▒

abaiducom)Q▒dnsbaiducom▒▒▒)Q▒ftpbaiducom▒▒{)Q▒wwwbaiducom▒▒o[root@192 ~]# xterm-256colorxterm-xterm-256colorxterm-256colorxterm-256colorxterm-256colorxterm-256colorxterm-256colorxterm-256colorxterm-256colorxterm-256colorxterm-256colorxt

erm-256colorxterm-256colorxterm-256color

(2）增量区域传送：仅复制区域里变化的文件

#修改主服务器的区域配置文件，序号比之前的序号大【注：区域文件里面必须要写从服务器的NS和A记录】

#增加主DNS服务器的配置【主dns服务器的ip地址为192.168.168.129】

#增加内容

[root@localhost ~]# vim /var/named/baidu

$TTL 1D

@       IN SOA @ admin.admin.com. ( 2024011400 1D 1H 3H 1D )

          IN   NS   dns.baidu.com.

dns     IN   A    192.168.168.129

www IN   A    192.168.168.111

ftp     IN   A    192.168.168.123

a        IN   A    192.168.168.100

aaa     IN CNAME a

bbb     IN CNAME www（增加的解析）

[root@localhost ~]#vim /var/named/named.192.168.168
$TTL 1D
@ IN SOA @ admin.admin.com. ( 2024011400 1D 1H 3H 1D )
IN NS dns.baidu.com.
129 IN PTR dns.baidu.com.
111 IN PTR www.baidu.com.
123 IN PTR ftp.baidu.com.
100 IN PTR a.baidu.com.
a IN CNAME aaa
www IN CNAME bbb（增加的解析）

#重启服务

[root@localhost ~]# systemct restart named

#从服务器验证：

#重启服务

[root@localhost ~]# systemct restart named

[root@192 ~]# nslookup

> server 192.168.168.129

Default server: 192.168.168.129

Address: 192.168.168.129#53

> bbb.baidu.com

Server:         192.168.168.129

Address:        192.168.168.129#53

bbb.baidu.com   canonical name = www.baidu.com.

Name:   www.baidu.com

Address: 192.168.168.111

>