Redirecting canonical hostnames in Apache (301 redirection)

In this example "domain.com" is redirected to "www.domain.com" with a 301 http response.

Open your deki configuration file. (Generally it is located at "/etc/apache2/sites-available/deki" on linux servers.)

nano /etc/apache2/sites-available/deki

It should look like this:

<VirtualHost *>
	ServerName www.domain.com

	ErrorLog /var/log/apache2/error.log 
	CustomLog /var/log/apache2/access.log common

	DocumentRoot "/var/www/domain"

	RewriteEngine On
      ...
</VirtualHost>

Add "NameVirtualHost *" line on top of the file.

NameVirtualHost *

<VirtualHost *>
	ServerName www.domain.com

Add these lines to the end of the file:

<VirtualHost *>
	ServerName domain.com
	RedirectMatch 301 ^/(.*) http://www.domain.com/$1
</VirtualHost>

Finally your deki configuration file should look like this:

NameVirtualHost *

<VirtualHost *>
	ServerName www.domain.com

	ErrorLog /var/log/apache2/error.log 
	CustomLog /var/log/apache2/access.log common

	DocumentRoot "/var/www/domain"

	RewriteEngine On
      ...
</VirtualHost>

<VirtualHost *>
	ServerName domain.com
	RedirectMatch 301 ^/(.*) http://www.domain.com/$1
</VirtualHost>