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2.2.1.2.199 IP_NAT_PORT_MAPPING

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The IP_NAT_PORT_MAPPING structure holds a static mapping that ties a public-side port on this NAT interface to a specific private machine's address or port. In the case of an interface with a pool of addresses, the "PublicAddress" specifies which of those addresses this static mapping applies to.

 typedef struct _IP_NAT_PORT_MAPPING {
   UCHAR Protocol;
   USHORT PublicPort;
   ULONG PublicAddress;
   USHORT PrivatePort;
   ULONG PrivateAddress;
 } IP_NAT_PORT_MAPPING, *PIP_NAT_PORT_MAPPING;

Protocol: Specifies the protocol used for data reception and transmission.

PublicPort: Specifies the destination port number of incoming public traffic.

PublicAddress: Specifies the public IPv4 address.

PrivatePort: The destination port number of the private traffic.

PrivateAddress: Specifies the private IPv4 address.