RDNS configuration error

[rafael.martinez]

I am having this error in the RDNS configuration of my dedicated server:
The system failed to complete validation of “xxx.xxxxxxx.xxx”'s “PTR” because of an error: (XID h23c98) DNS returned “SERVFAIL” (code 2) in response to the system's query for “xxx.xx.xxx .xxx.in-addr.arpa”'s “PTR” records.

I do everything to solve:
1- I have already contacted the data center where my server is and they helped me set my localhost to the main IP of the server, according to:

https://kb.iweb.com/hc/en-us/articles/230242968-Configuring-Reverse-DNS-Control-Center-or-Customer-Hub-?mobile_site=true

2- I have created the registry according to:

How to Configure Reverse DNS in WHM | cPanel & WHM Documentation

Use the steps in this document to determine your server's authoritative nameservers.

docs.cpanel.net

Could you help me find out what I'm doing wrong?

 

[cPRex]

Hey there! Can you manually check the reverse DNS on the IP address with this command:

dig -x 1.2.3.4

where "1.2.3.4" is the IP address you're checking. If that returns the hostname, that would confirm the reverse DNS is set up properly.