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udp multicast

Posted By:      Posted Date: September 06, 2010    Points: 0   Category :.NET Framework
HI I WORK ON SILVERLIGHT.and silverlight 4 now has the cappability of using udp multicast as System.Net.sockets has provided additional classes.but my question is i make a chat application using udp multicast and it works perfectly now i want to try it over the internet is it possible? and how what is the suitable multicast group ip plz i want examples in silverlight we need a multicast policy server,.so i must  put it on a public ip with port 943 and it will work help please

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