IP canonicalization
IP canonicalization is a technique sometimes used for SEO (search engine optimization). When a site's IP address is canonicalized, the IP address redirects to the domain name.
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^12\.34\.56\.789$
RewriteRule ^(.*)$ http://www.domainname.com/$1 [L,R=301]
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^12\.34\.56\.789$
RewriteRule ^(.*)$ http://www.domainname.com/$1 [L,R=301]