Hello i'm now found this project and it really good! Before i found this, i try tailscale, but experienced some truble. like userspace wireguard and it not support standalone wireguard installation... But they relay technolgy (DERP) is really cool, because it use https to hide wireguard UTP communication. It is really usefull with clients that blocked networks. (like mobile phones on corporate network) I read that netmaker also use relay server. My question is that relay server is accesable with blocked networks? (like DERP) or need UDP connection that able to use it the clients?

The relay server will work with or without udp hole punching enabled. Our relay server functionality is quite a bit different than DERP and entirely manual (for now). You need to specify a machine to act as a relay, and then specify which machine it will relay.

I see. But what the protocol that relay server and a machine communicate each other?

oh yes that is UDP

Ahh i see. so it is not good to me