How to Configure Reverse DNS Resolution?

Reverse DNS resolution is the mapping of IP addresses to domain names. RFC1035 defines PTR records for the management of reverse mappings from IP addresses to domain names.

Before creating PTR records, the Reverse DNS Resolution Zone should first be established. The suffix of the Reverse DNS Resolution Zone must be in-addr.arpa. The master record is the reverse sort of the IP address.

If the VPC that needs to use the Reverse DNS Resolution Zone is 10.9.0.0/16, then the Zone name to be created is:

9.10.in-addr.arpa

If the addition is 10.9.2.1, the corresponding domain name is console.dezai.com, then the PTR master record to be added is:

1.2.9.10.in-addr.arpa

The corresponding value is

console.dezai.com

This can be configured to take effect.

Currently, UDNS provides PTR resolution capabilities for IP addresses within the following ranges:

10.0.0.0/8
192.168.0.0/16
172.16.0.0/12