What is creating the utun0 network interface on OSX? What is it being used for? What is it exactly?
The interface only appears after connecting to the Ethernet or turning on the Wi-Fi and goes away after restart. It does not show up in the Network Preference Pane. Using ifconfig
the interface looks like this.
utun0: flags=8051< UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
inet6 fe80::c502:a4a6:a260:e0d1%utun0 prefixlen 64 scopeid 0x7
inet6 fd4c:2989:56f0:25be:c502:a4a6:a260:e0d1 prefixlen 64
nd6 options=1<PERFORMNUD>
My next question would be why the MTU size of 1380, but maybe it would help if i understood what this interface is, what is it being used for, and what is responsible for it's creation.
I'm NOT using a VPN. I do have Wireshark installed and GNS3 and VirtualBox. I don't know if any of those applications would be responsible for the creation of utun0. I'm interested in man pages, documentation, or guides from which I can learn more. Any help or suggestions appreciates.