Today I looked at the interfaces on my Mac and so I saw the adapter "utun0" on the Mac, this is just for VPN Connections or "Back to my Mac" thought. I have never VPN enabled and "Back to my Mac" is not enabled. Is the adapter creates by default or what program creates it? Something is afraid of malware / adware / viruses, etc.
I use Sierra. It's a FE80 also a local address ... I mainly installed Firefox and Photoshop