Are you able to watch the channels in the server app on your PC ? If yes and as you said that the internet media player works in local network then I think the issue is on the router side. Could you post some pictures from the router and Enigma-TV settings so I can check ?
Openning ports in router doesn't allow the connection. I entered the server in DMZ (router). The Firewall doesn't block (oppened all ports and applications). Start Internet Control - WEB Server is GREEN. Start Streaming (Flash Mode) - WEB Server is RED Start Streaming (iOS mode) - WEB Server is GREEN. Local TV Interface - Works. Media Player (checked in 2 computers) - connects using Internet, change Channels but the screen is black (no image). I have the last Flash Player installed in all my computers.