Silverlight client port check

I'm facing a problem that gives me a quite hard time ...

People having trouble to execute a program that needs specific ports to be open, sadly they don't know if its a clientside problem caused by blocked ports, of it its simply a software problem. So I thought about making a program that checks if the user can access the provided ports, after I made the WPF application, I was thinking about having an easier access to such functionality and tried to produce a Silverlight Version.

Questions:

a.) Is there even a way to check if the user can connect to specific ports that aren't in the range of 4502 - 4534 within a silverlight application that runs as plugin in the web browser ?

b.) Is there a way to do this, even without having access to the specific server to p开发者_如何学运维rovide a policy file?

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If you trying to do it from the in-browser application that its a no. Trusted silverlight application should be able to connect to any port without restrictions.