crossdomain.xml doesn't give my Java applet access

I have a Java applet on my site that interacts with my server such that I need a crossdomain.xml file to allow permission. I've gotten around this by running my code inside a doPrivileged() block. However, on Safari, it doesn't work without a crossdomain.xml file. So I made one, and here it is:

  <?xml version="1.0" ?> 
  <cross-domain-policy>
       <allow-access-from domain="*" /> 
  </cross-domain-policy>

It works fine. The problem is that due to security issues, I can't allow access from anywhere. I tried this:

  <?xml version="1.0" ?> 
  <cross-domain-policy>
       <allow-access-from domain="*.mydomain.com" /> 
  </cross-domain-policy>

But that doesn't work: my applet doesn't get the right privileges when running in Safari. Why does this not work? Is my applet running from a different domain that I need to include? How do I find out which one it is?

My applet is just tr开发者_Python百科ying to get an output stream from a URLConnection.

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Access from specific domains is not supported. See the Plug-In 2 page.