The problem is that we apparently don't receive any tracking of google analytics. We have X domain for that particular site. Google analytics only appear to support one domain unless you setup links and forms which isn't really a great idea.
I believe it will be better to have only one working domain and all other domains will work as redirects. In other word, I can setup my NGinx server to redirect all satelites domain to the main domain... or edit directly the dns to redirect to the main domain.
I'd like to know which way of doing redirect is the best and how exactly. I guess I should return a 301 message error.
On the other hand, if there is a way to handle simply google analytics with all the domains it would be also great.