What is a cross-domain policy file and how do I use it for multi-domain web site hosting?
Beginning with Flash Player 6, security restrictions have prevented Flash movies from dynamically loading content from domains other than the domain that the Flash movie itself is in. This restriction can be addressed through the use of a cross-domain policy file. A cross-domain policy file is simply an XML (text) file that provides a way for the server to indicate that its data and documents are available to SWF (Flash movie) files served from certain domains or from all domains. Any SWF file that is served from a domain specified by the server’s policy file will be permitted to access data or assets from that server. When a Flash movie attempts to load data from another domain, Flash Player automatically looks for policy file on that domain. If one is present, the data is automatically accessible. For complete information on creating and using cross-domain policy files, visit the Adobe web site and read TechNote 14213.
