When I initially tested this, the upstream seemed a good idea and worked
as expected but it no longer does and disconnects clients every 60
seconds indicated by the following line in tailscaled on the client:
magicsock: [0xc00444a640] derp.Recv(derp-901): derp.Recv: EOF
By connecting directly things work more reliable and there are no
connection resets every 60 seconds anymore.
