How can you integrate the CDN with Magento?

Migrate content to CDN

1. Login to the Magento Admin Panel.
2. Navigate to Magento Admin > Configuration > Web > Unsecure.
3. Update the following with the CDN URL(eg, cdn.magento.com):
   1. Base Media URL: cdn.yourmagento.com/media/
   2. Base Javascript URL: cdn.yourmagento.com/js/
4. Click Save to update the changes.
5. Then Navigate to Magento Admin > Configuration > Current Configuration Scope: Main Website > Web > Unsecure > Base Skin URL.
6. Untick Use Default for the Base Skin URL
7. Update Base Skin URL:
   1. Base Skin URL: cdn.yourmagento.com/skin/
8. Click Save to update the changes.

Verification
Verify if your Magento is on CDN by viewing the HTML source code. Image links shall be replaced with CDN URLs.

setup cdn source http://www.riyaz.net/blogging/setup-own-cdn/890/