For security reasons, you may wish to limit the URLs from which users can get content that is displayed on your Confluence site, such as the content displayed in a gadget. A whitelist is a list of URLs whose content you wish to make available to users of your site.

Adding whitelist URLs for external gadgets

By default, Confluence will block a gadget's access to third-party data sources. When you are using a gadget that draws content from a third-party data source, you will need to add the URL of that data source to the gadget whitelist.

To add a URL to the whitelist for gadgets:

1. Choose Browse > Confluence Admin.
2. Click External Gadgets in the left-hand panel.
   
3. Click the Gadget Whitelist tab.
4. Enter a URL for the Host to Whitelist. For example, http://jira.atlassian.com.  You can also enter a URL pattern, as described below.
5. Click Add.