Jerry West has a great post on his site about how to avoid internal duplicate content penalties that can occur if someone links to your site using the “www” version of your domain name when your site is setup to not use it.
The post also points out the danger of using internal relative links.
The fix is a simple bit of code added to your .htaccess file which forces browsers to used your preferred version of you domain.
# Begin non-www page protection #
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www\.webmarketingnow\.com [NC]
RewriteRule ^(.*)$ http://www.webmarketingnow.com/$1 [L,R=301]
</IfModule>
# End non-www page protection #
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Steve Stelzner · April 5, 2009 at 12:59 pm
I had an interest in the duplicate content issue since i’m using addon domains that have a similar structure but different content.
And my second addon is not being listed in any of the Serps and i’m trying to figure out why.
I’ve used IBP and did the needed changes to increase my listing but am not listed yet after a mth so somethings wrong.
Steve