Question

I have 3 domains, for the same web app, since I don’t want to have duplicated content I want to redirect the other two domains to the primary domain.

If a user types client_xyz.domain2.com it should be redirected to client_xyz.primarydomain.com.

If a user types client_xyz.domain2.com/folder/file/etc it should be redirected to client_xyz.primarydomain.com/folder/file/etc.

If a user types domain2.com/test/page it should be redirected to primarydomain.com/test/page

I thought this is the best solution to avoid Google penalty for duplicated content.
If you think there’s a better solution to deal with this (eg. DNS), let me know.

Answer 1

Put this code in your .htaccess file:

Options +FollowSymLinks -MultiViews
RewriteEngine on

RewriteOptions MaxRedirects=10

RewriteCond %{HTTP_HOST} ^(client_xyz\.)?domain2\.com$ [NC]
RewriteRule ^ http://%1primarydomain.com%{REQUEST_URI} [NE,R=301,L]