So I had port 5938 exposed to the world accidently. No foul.
No one seemed to be able to establish a session it according to the teamviewer logs.
But netstat show some random (non teamviewer) IP connecting directly to 5938 .
I blocked incoming 80 and 5938 . I am still able to connect to that system. Incoming and Outgoing teamviewer connections still work.
What is the point of having 80 and 5938 open by default for Teamviewer?
also, why would I be seeing random IP's with established connections on port 5938 ?
does teamviewer use some sort of p2p networking?