Stream from outside the network breaks off - Issue solved?

[Burkhazad]

I want to try it. But my first attempt was failure.

What have i to do?
- No-IP Domain set on Port 80 Redirect to port 8080
- Router Portfowarding to: external 8080 to internal 80

Or which way do you prefer or would advice?

I also had a call with my ISP, on their side there is no blocking an i only had a small difference from about 2Mbit on Upload. No other malfunction on side my ISP.