the IP address is the same on FreeDNS, Digital Ocean, and DNS checker.
Lastly, I don't get a message that says "Successfully built" after ODK Central installation. It just says " FINISHED". Could that be the problem?
See the screenshot below.
It sounds like you've followed the docs to setup Central. The next step in those docs is to start Central. What happens when you follow the docs to start Central?
Do we have to add dns1... dns3 name servers to the subdomain? I can't add them to the domain servernux.com since I am not the owner.
What does "Broken" means to a newly created domain? How can one resolve such as an issue. I created a new one in freeDNS and it has been showing "broken" message for the past two days.