The problem is with the domain, in windows everything is fine, but in linux it does not work. What could be the problem?

Question

Ruby on Rails

Hello everyone. There is a site on ROR, located on Heroku and the ru domain from 2domains. All this works through CloudeFlare CDN. The problem is this - if I go to my domain from Linux at the address domain.ru , then he writes to me that the server was not found, but everything is fine on Windows. And with https:// the exact same nonsense. What is the problem I do not understand, because in this I am a complete zero ((
Settings with CloudeFlare

Answer 1

maybe on Windows what DNS servers are registered or registered in hosts and forgotten?
Try on Linux in /etc/hosts to register your domain

Answer 2

In general, I still did not understand what kind of nonsense, but now it all worked