Sometime in the last few months, my Surface 3 started having problems connecting to my home WiFi. In the course of troubleshooting, I discovered that private networks (e.g. Home Groups) now require that IPv6 be turned on. Once I did that, everything worked. My router (Netgear R6400) does not have separate LAN and WAN controls for IPv6. I don't want to use IPv6, due to privacy issues. Am I stuck with having it turned on?