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 host record is the reverse sort of the IP address.

Assuming 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

Assuming the addition is 10.9.2.1, with the corresponding domain name being console.ucloud-global.com, then the PTR host record to be added is:

1.2.9.10.in-addr.arpa

The corresponding value is

console.ucloud-global.com

This can be configured to take effect.

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

10.0.0.0/8
192.168.0.0/16
172.16.0.0/12

get monitoring metrics How to use UDNS in a hybrid cloud?