I believe the real problem is that I don’t know how and when you trying to connect to my router !
For example do i need to send messages here when I’m connected to my R2 ?
You need to tell me when you are trying to access my router ! Because for example the router ( might) be switched off or not connected to the internet ! ( might be the issue you are having )
also you need tell me how you can access my router ? For example is just knowing my wan iP enough? What if someone else have the same ? for example is it possible that you don’t need to know my R2 MAC and serial number ?
I really have no idea on when exactly you are trying to access and how ? Which I think is the issue here ...