I have a single nic set up, isa 2006 proxy that i can not stream real player via. I know it is not the firewall because if i avoid the proxy it works fine. A box comes up to use authentication but when i look at the log monitoring it still goes through as anonymous user. I can not allow anonymous out management requirement.
Here i a link for example that has real player streamed content that will not work http://www.abc.net.au/triplej/listen/default.htm