Magento CDN connection is simple and won’t take a lot of time if you know where do you start.

1. Go to the admin panel (http://yourdomain.com/index.php/admin/ for those who forgot) 2.Now you have to open the following tab Configuration -> Web -> Unsecure Magento CDN 3.Now you have to change these 3 lines and insert your values Magento CDN configuration 4. Save all the changes and you are pretty much  done with that. These small configurations should be enough to increase your  site performance significantly by dint of the CDN. More speed improvements for magento you can find here.