Unblocking Sopcast ITV

Hello Astaro-Forum,

Already searched almost the whole internet without finding an answer.
I'd like to give access to Sopcast ITV Streaming / Sharing on my Astaro. What I can see is that Sopcast tries opening a wide area of Ports.
There are also some pages saying it uses Ports 3900:3920 but this doesn't work.

Does anyone of you has experienced the same problems and did find a solution?

Thank you for your replies!!