Linux网络-DNS域名解析服务（主从解析）

主从解析

Centos1为dns主服务器，Centos2为缓存服务器，win10为客户端

首先配置缓存服务器

1.用yum安装bind

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

2.配置主配置文件，将可使用本DNS网段的网段设为所有

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

options {
     
        directory       "/var/named";
         forwarders{
      192.168.27.128; };///本地没有解析记录时，转发到那个DNS服务器去替我查找
        allow-query     {
      any; };//改为any
}；

3.重启

[root@localhost ~]# systemctl start named

 journalctl -xe  //重启报错,查看日志，找出错误

4.给win10设置缓存服务器的IP地址

查看缓存服务器的IP地址

[root@localhost ~]# ifconfig ens33
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.27.131  netmask 255.255.255.0  broadcast 192.168.27.255
        inet6 fe80::261e:7e7a:e77c:afb4  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:cc:3d:d8  txqueuelen 1000  (Ethernet)
        RX packets 55198  bytes 24868392 (23.7 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 71061  bytes 17262114 (16.4 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Centos1为dns主服务器，Centos2为从服务器，win10为客户端，主从同步解析

配置从服务器

1.用yum安装bind软件

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

2.更改主配置文件

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

options {
     
        listen-on port 53 {
      any; };//将监听端口改为any
        listen-on-v6 port 53 {
      ::1; };
        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";
        recursing-file  "/var/named/data/named.recursing";
        secroots-file   "/var/named/data/named.secroots";
        allow-query     {
      any; };//允许所有的

3.更改区域配置文件

[root@localhost ~]# vim /etc/named.rfc1912.zones

zone "shaole.com" IN {
      //设置域名为shaole.com
        type slave;//设置为从服务器
        file "slave/shaole.com.zone.slave";//设置区域数据配置文件名，（在slaves目录下）
        masters {
      192.168.27.128; };//设置主服务器地址
};      

4.重启

[root@localhost ~]# systemctl start named

5.查看端口

[root@localhost ~]# netstat -anpu | grep 53

配置主服务器

1.配置主配置文件

将监听地址和可使用本DNS网段的网段设为所有

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

options {
     
        listen-on port 53 {
      any; };//将监听地址设为any
        listen-on-v6 port 53 {
      ::1; };
        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";
        recursing-file  "/var/named/data/named.recursing";
        secroots-file   "/var/named/data/named.secroots";
        allow-query     {
      any; };//将本DNS的网段设为所有

2.配置区域文件

[root@localhost ~]# vim /etc/named.rfc1912.zones

zone "shaole.com" IN {
     //设置域名
        type master;//设置为主服务器
        file "ky11.com.zone";//设置区域配置文件
        allow-transfer {
      192.168.27.131; };//设置备服务器地址
};      

3.配置标识区域文件

[root@localhost named]# vim shaole.com.zone

$TTL 1D
@       IN SOA  @ rname.invalid. (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
        NS      @
        A       192.168.27.128//配置主服务地址
www     A       192.168.27.128//解析地址
~  

4.重启

[root@localhost named]# systemctl restart named

配置win10

解析

当主服务器挂掉

1.先停止主服务器

[root@localhost named]# systemctl syop named

2.配置 win10