Content Duplicacy for Multiple Domain with same website

multiple domains point to the one URL

redirect all your secondary domain names to your primary domain name is to do it at your domain name registrar level. Instead of setting the DNS of all your domains to your web hosting account, just set your primary domain name.
n. Log into your domain registrar's website, and look for either "URL Forwarding", "Forwarding", "Redirection" or something to that effect.


I suggest you three solutions that have different effects but are good for the scope:

*

Insert this rule in the robots.txt file only of the multiple domains:

User-agent: *

Disallow: /
*

Apply an permanent redirect from the multiple domains to the main site, the request www.youbusiness.fr (or other) will be redirected to the .COM domain
* Create a landing page to be published in the multiple domains
The difference between a 301 and a 302 is that a 301 status code means that a page has permanently moved to a new location, while a 302 status code means that a page has temporarily moved to a new location.

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