Question

Possible Duplicate:
apache redirect from non www to www

Is it possible to configure DNS to add www. prefix to the domain name?

Here is an example of this

Answer 1

Nope. You have to configure the webserver at yourdomain.com to redirect to www.yourdomain.com.

For example, on apache, you can use this configuration (using mod_alias):

<VirtualHost *:80>
  ServerName www.yourdomain.com
  ## Actual configuration here...
</VirtualHost>

<VirtualHost *:80>
  ## redirect non-www to www
  ServerName www.yourdomain.com
  ServerAlias yourdomain.com

  RedirectMatch permanent ^(.*) http://www.yourdomain.com$1
</VirtualHost>