How to integrate Hostry CDN with XenForo
First you should edit the file config.php which is located in directory library.
Add the following lines to the file:
$config ['externalDataUrl'] = 'http://cdn.your-domain.net/data';
Login to your XenForo admin panel.
Go to Style ⇒ General ⇒ Settings.
Under field Path to Images replace the current content /styles/default with http://ccdn.your-domain.net/styles/default
Update Style Properties to leave your settings.