Force a Domain Name in the URL Displayed by the Web Browser

This guide explains how to force the display of the web hosting name in the browser's address bar to one of the installed alias/synonym domain names or how to display the main domain in the address bar instead of the alias.

Limit "duplicate content"

Assuming you have the hosting your-domain.com with Infomaniak and that as a synonym domain you have installed www.synonymdomain.xyz.

By default, when you type either of the domain names (your-domain.com or synonymdomain.xyz) in your browser's address bar, the one you typed will be displayed in the address bar.

You have the option to force the display of an address other than the one that was typed. 

So if someone types synonymdomain.xyz, your-domain.com will automatically be displayed in the address bar.

A code is to be entered in a file called .htaccess that must be located at the root of your hosting (in the /web folder of your FTP).

If this file does not yet exist, you need to create it on the server.

Then insert these directives into the file:

RewriteEngine on
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteRule (.*) https://your-domain.com/$1 [R=301,L]

Adjust the code above according to these instructions:

• replace your-domain.com with your domain name with the appropriate extension (.com, .fr, .ch, etc.) that you want to display in the visitor's browser address bar. Add www. before your-domain.com if necessary.
• replace the second line of the above code with "RewriteCond %{HTTPS} off‍" if a loop error occurs, this means that HTTP/2 is active for this site

Also read the automatic redirection to httpS.