No there isn’t it’s purely P2P. It’s a DHT same as BitTorrent. @supersu isn’t running any infrastructure or anything.

To punch the whole, isn't there a TURN server or something? How do you establish a p2p connection if one of the devices is behind a NAT?

Sickle cell anemia. Different cranial shape to accommodate brain sizes and capacities. Various eye colours associated with environmental evolution and even orbital bones are shaped differently. Caucasoid facial features, especially in the zygomatic and vomer bones, are different to accommodate nasal width. We are not the same. No I will not stop.