Redirect without WWW to a WWW domain for Vhost.

<VirtualHost *:80>
  ServerName www.namran.net
  ServerAlias namran.net
  RewriteEngine on
  RewriteCond %{HTTP_HOST}                ^namran.net(:80)?$
  RewriteRule ^/(.*)                      http://www.namran.net/$1 [L,R=301]
 
  <Proxy *>
    Order deny,allow
    Allow from all
  </Proxy>
  ProxyPass / http://www.namran.net/
  ProxyPassReverse / http://www.namran.net/
 
</VirtualHost>