Is it possible to create any sort of plain (IPv4, non-ipsec) static tunnel interface using only components of Windows server? Any protocol will do as long as there is reasonable linux support for the other endpoint. IPIP or GRE would be great.
I can sort out my own routing, I don't want sessions, authentication or encryption. I just want the tunnel. It's very easy to write a simple script to to do this with the open-source TUN driver, but I would much rather stick to in-built components if possible.