HOW TO USE CYBERPANEL AS DNS ONLY SERVER!

Support and Discussion DNS Server
1

How to fix?

; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7_5.1 <<>> xxx.com @35.199.xxx.xxx ns
;; global options: +cmd
;; connection timed out; no servers could be reached

2

I think you have an external firewall blocking DNS ports.

3

worked, thank you