As I was following this tutorial https://www.digitalocean.com/docs/networking/dns/quickstart/, I configured the nameservers on my registar website. It looks like this:
It has been four hours ago now and my website helmutlotti.nl still isn’t accessible.
In the meantime, I installed the Nginx server on Ubuntu 20.04 succesfully and when I access my ip-address, I can see that the Nginx server is properly installed. My conclusion is that the ip-address is properly functioning, but there must be something wrong with the DNS settings.
I troubleshooted with the WHOIS and Dig commands via this tutorial https://www.digitalocean.com/community/tutorials/dns-tips-and-tricks, but nothing seems wrong to me there.
What do you guys think? Have I done something wrong in the settings?
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I have found the answer and submit it here, hope that it will help future developers. A problem arose, because I installed the Nginx web server using step 1 from this tutorial Example link, but I did it without having the domains properly secured with an SSL/TLS certificate. Some browsers properly redirected my domain name to the IP address (Firefox & Safari), but other browsers did not and indicated that they couldn’t find the page (Chrome). After I installed the certificates using this tutorial Example link everything worked properly on all browsers.
My advice in a nutshell:
Be patient after making the DNS configuration. It sucks a bit that you have to wait while you want to start working on your machine as soon as possible, but it’s worth the wait since it can save you some confusion and possibly configurations that get messy. My advice is to wait 24 hours, then all settings on all browsers are likely to be changed properly.
Secure your web server OS (like Apache/Nginx) securely right after installation. As stated above, this simple adjustment was the solution to my problem.
Looking at the DNS for the domain name in question, the nameservers are not propagating/resolving at all. Is there any chance you can double check the NS configuration in the registrar’s control panel and if possible to confirm with the registrar support team if the issue is still persisting?
Hope that this helps! Regards, Alex