Silverlight 4 in the real world - communication with server

We currently have a silverlight application (kind of a game) and we need to add more functionality which requires more interaction with the server.

We currently do all interaction by HTTP requesting data from the server and then processing on the client - works well, until we have a lot of requests or larger data amounts being returned.

Sockets in Silverlight only work on port numbers between 4502 and 4534, is there a way of making this work on the internet? A way of allowing the user to simply accept and open up a 开发者_运维百科port?

What is actually blocking the port range?

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Just to add, is this somthing that is possible in Java (http://homepages.uel.ac.uk/2795l/pages/socketap.htm)

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The only way to achieve this is via a proxy on the server or some sort of port forwarding taking place on the server.

This can not take place on the client side by itself.

What is actually blocking the port range is the SL runtime. It does this for security reasons.

In reality making use of sockets in an Internet based application would provide some hurdles most notably the need for the firewall to allow ports 4502-4534 to be open for Silverlight communication. This is one reason that the use of sockets is used more within an Intranet application where the need to open ports is non-existent (for the most part). Since Silverlight has defined these ports as the means of communication for their runtime it at least gives the admins some control over that range; versus allowing the runtime to operate on any given number of ports.

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No direct way around it ( http://blogs.msdn.com/b/ncl/archive/2009/06/23/why-does-silverlight-have-a-restricted-port-range-for-sockets.aspx ).