Nikronic:

I do not know what I should write in the Allowed IP section.


Leave it empty for now.



 Nikronic:

I get this error


I don’t know which step doesn’t work for you. But… it took me best part of a year to master port forwardings, anyway 
I can help you to debug this interactively, preferably through audio + screen sharing. Would you like to do it? Hangouts or Skype perhaps?