How to set up a synonym for a domain on Ru-Center hosting?

Question

Network administration

Hello! One account has two domains with automatic DNS support, registered in the same place, in Ru-Center. Let's call them x.ru and y.ru . I was given the task of providing access to the site x.ru also from a subdomain of the second site, say, abcd.y.ru . That is, when visiting abcd.y.ru , the content of the site x.ru should be displayed . Tried the following:

1. First, I added the synonym abcd.y.ru to the x.ru domain
   
2. Then I tried to add the synonym abcd.y.ru to the site y.ru and already on this site I added the RewriteRule processing to .htaccess
   

But in both cases, the domain is not pinged and, accordingly, is not opened by the browser.
In this regard, the question is: how is the synonym (alias) configured in this case?

Answer 1

no, you just need to add an alias to the virtualhost and that's it, look at the alias in the admin panel.
However, you were given the wrong task.
Mirror sites have a very bad effect on website promotion, since the content is not only not unique, but also cuts visitors in half, thereby lowering the overall values ​​for each of the sites.
So return the TK for revision.
If you needed to redirect from one to another, then everything is much simpler