主DNS实现反向解析

DNS 服务器

配置文件

vim /etc/named.conf
options {
//      listen-on port 53 { 127.0.0.1; };
//      allow-query     { localhost; };
}
vim /etc/named.rfc1912.zones
zone "43.168.192.in-addr.arpa" IN {
        type master;
        file "43.168.192.zone";
};

区域数据库文件

vim /var/named/43.168.192.zone
$TTL 1D
@       IN SOA  master.study.com. admin.study.com. (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
                        NS      master.study.com.
master.study.com.       A       192.168.43.7
17                      PTR     www.study.com.
200                     PTR     ftp.study.com.
100                     PTR     mysql.study.com.

DNS 客户端

本机充当客户端进行测试

dig -x 192.168.43.17 @127.0.0.1
dig -t ptr 17.43.168.192.in-addr.arpa @127.0.0.1