This enumerated type is part of the P2P Interface.
Categories of NAT strictness.
|EOS_NAT_Unknown||NAT type either unknown (remote) or we are unable to determine it (local)|
|EOS_NAT_Open||All peers can directly-connect to you|
|EOS_NAT_Moderate||You can directly-connect to other Moderate and Open peers|
|EOS_NAT_Strict||You can only directly-connect to Open peers|