The PR talks about the new NAT traversal for P2PRC. The initial plan as mentioned in this PR is to use a TURN based NAT support using FRP. This means for Nodes to escape NAT they are dependent on nodes which have a public IPV4 address to relay traffic through that. When a node behind NAT is acting as a server it will use closest server with an IPV4 address to relay traffic through that to advertise public availability IP and will also use the same server for allocating ports.
The PR talks about the new NAT traversal for P2PRC. The initial plan as mentioned in this PR is to use a TURN based NAT support using FRP. This means for Nodes to escape NAT they are dependent on nodes which have a public IPV4 address to relay traffic through that. When a node behind NAT is acting as a server it will use closest server with an IPV4 address to relay traffic through that to advertise public availability IP and will also use the same server for allocating ports.