Web player security and proxy server access

Hi,

We have implemented some domain locking on our web player, similar to what is described here:

http://answers.unity3d.com/questions/36816/does-the-unity-player-support-domain-locking.html

Unfortunately, we want to allow access to the site from proxy servers and occasionally these proxys are changing the value of domain.hostname, causing the domain locking to kick in.

Can anyone think of a way for the web player to check that it is being hosted on a particular server? Right now the solution we have is to get the hostname for all of the proxys and that is not likely to remain practical.

I was thinking of maybe trying to access another file in a separate domain on the server and then use crossdomain.xml to ensure that the domain was something we want to allow, but I think that gives the same problem where we would need to add all of the proxys to crossdomain.xml.

Thanks, Jared