Wiki does not have enough information to successfully run server

[iopq]

1. Wiki does not mention to git checkout recursive to compile because it links to udp2raw compile instructions
2. Wiki does not mention that rp_filter might prevent packets from coming back from the server

After figuring the rp_filter part I was able to connect, but there's no way to guess that unless you know

[iopq]

To open a tunnel without root, you need CAP_NET_ADMIN capability as well