Darren, so you are using all three components : Unreal *client*, Unreal *Media Server*, and Unreal *Live server* ? And the firewall between each leg ? I'm not sure if it would be of any help, but I am also using this setup apart from using the Unreal Client, I connect to the Media server using the MMS: protocol which works correctly through the firewall and is supported by Windows/VLC/Android(VPlayer). My experience with the provided client is rather poor (unless you really need authentication which might be an issue with the MMS protocol) Cheers.
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