Find out why implicit NAT traversal is not working for DHT

[F483]

As can be observed in the attached network map, nodes without a public IP (blue) never link to other nodes without a public IP.

Given that nodes update there routing table every 2 min, they should implicitly UDP punch each other over time. For some reason this is not happening.

[F483]

It may be that nodes behind a NAT have actually linked to other nodes behind a NAT, its just that we cant observe this because nodes are contacted directly. Thus we see the links from nodes with a public ip to nodes behind a NAT because we can contact the public node.

It will be more clear once relay messages are use to get node information.