Redirect addon domain

Hi,

I run phpld on an addon domain.
My problem is that when logging in to addon.maindomain.com shows the same result as addon.com & because of a server error a little while back, google had indexed the addon.maindomain.com as well and now I'm afraid that I will be penalized for duplicate content.

I would like your advice and guide on how to fix this problem.
I've considered a disallow on the robots.txt file, but I don't know exactly how to write it
or perhaps a 301 redirect on htaccess file, but when adding this line:
RewriteRule (.*) http://www.addon.com/$1 [R=301,L]

I get blocked from accessing the domain at all.

I'd appriciate your experts help.

 

It's perfectly OK that addon.domain.com content is same as addon.com

Place this .htaccess file in public_html folder of addon domain :

RewriteEngine On
RewriteCond %{HTTP_HOST} ^addon\.domain\.com$ [NC]
RewriteRule ^(.*)$ http://www.addon.com/$1 [R=301,L]

 

Thank you so much....

I've tried similiar things that didn't work.
This one worked perfectly.

 

Good to know that it worked for you...
I deserve a green reputation then...

 

Don't really know how to do those....

 

Just click the "scales" icon to the top right of my post.
This would help you rep. others in the future too

 

ok, I think it's done. thanks again.