To join the larger public Yggdrasil network, you need to peer with at least one publicly reachable node. Most likely that machine has a static IPv4 address. The

To join the larger public Yggdrasil network, you need to peer with at least one publicly reachable node. Most likely that machine has a static IPv4 address. There are a number of such nodes operated by volunteers, and they enable the magic that allows any device to join the network and immediately start receiving inbound traffic from the rest of the network. By opening an outbound connection to the public node, a channel is created for traffic to flow back to the non public node.