Silverlight Cross-Domain Without Firewall Policy File

Question

Is it possible to somehow ask the user to allow cross-domain access instead of the policy file on the target server?

Usage scenario: The Silverlight application will communicate with devices and is located on the client’s local network, and these devices will not know in advance that the Silverlight application should talk to them.

Answer 1

This is not a solution that a user can make in the security model that Silverlight implements. Its "owner" of the destination site is to select the policy. There is no way to determine that the user is the owner of the destination.

The solution is to use the site hosting the Silverlight application as a proxy to access other services on the client network.