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一、要求

1.搭建dns服务器能够对自定义的正向或者反向域完成数据解析查询。
2.配置从DNS服务器，对主dns服务器进行数据备份。

二、代码

1.配置主服务器

[root@localhost ~]# dnf  install bind 
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0####################主配置文件定义正反向解析域#####################
[root@localhost ~]# vim /etc/named.confoptions {listen-on port 53 { 192.168.199.129; };directory 	"/var/named";allow-query  { any; };allow-transfer {192.168.199.128; };
};
zone "openlab.com" IN {       //正向解析域type master;              //主dns服务器file "named.openlab.com";  //正向解析的资源记录文件（数据文件）
};
zone "199.168.192.in-addr.arpa" IN {   //网络位地址倒序表示type master;file "named.192";allow-update { none; };
};#######################正向解析资源记录文件#######################
[root@localhost ~]# vim /var/named/named.openlab.com$TTL 1D
@	IN	SOA	@	lxx.qq.com  (20241030001M1M1M1M )IN	NS	ns.openlab.com.IN	NS	slave.openlab.com.
ns	IN	A	192.168.199.128        //主服务器ip
slave	IN	A	192.168.199.129    //从服务器ipwww	IN	A	192.168.199.111
ftp	IN	A	192.168.199.222
wwww	IN	CNAME	www###########################反向解析记录文件########################
[root@localhost ~]# vim /var/named/named.192$TTL 1D
@	IN SOA	@ rname.invalid. (0	; serial1M	; refresh1M	; retry1M	; expire1M )	; minimumNS	ns.openlab.com.
132	PTR	ns.openlab.com.
111	PTR	www.openlab.com[root@localhost ~]# systemctl restart named   #主服务器重启服务（在监听日志之后操作）########################解析测试#########################
[root@localhost ~]# nslookup
> server 192.168.199.129           #指定解析数据的dns服务器是192.168.199.129
Default server: 192.168.199.129
Address: 192.168.199.129#53
> www.openlab.com                  #正向解析查询域名对应的ip地址
Server:		192.168.199.129
Address:	192.168.199.129#53Name:    www.openlab.com
Address:  192.168.199.111

2.配置从服务器

[root@localhost ~]# dnf  install bind 
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0[root@localhost ~]# vim /etc/named.confoptions {listen-on port 53 { 192.168.199.128; };directory 	"/var/named";allow-query  { any; };
};
zone "openlab.com" IN {       type slave;              file "named.openlab.com";master { 192.168.199.199; };  
};
zone "199.168.192.in-addr.arpa" IN {   type slave;file "named.192";master { 192.168.199.199; };  
};[root@localhost ~]# tail -f /var/log/messages    #从服务器中监听日志信息