Glue domains?

Question

URL Handling

I don’t know how to formulate correctly
, in general,
is it possible to open a site on 2 or more domains ,
i.e.
at site.com there is a site
there is a site.ru domain, it is
possible to open the same site.com site at site.ru,
but whatever it was a redirect that will redirect to site.com
and the site was surfed at site.ru, including internal transitions,
so far it only came to mind on the site.ru domain in the index file connect site.com
via iframe

Answer 1

elementary: prescribe the second domain as an alias in the web server settings.