Feature Description

The Network Address Translation (NAT) feature translates non-routable private IP address(es) to routable public IP address(es) from a pool of public IP addresses. This feature enables the user to conserve on the number of public IP addresses required to communicate with external networks. This feature also ensures security as the IP address scheme for the internal network is masked from external hosts, and each outgoing and incoming packet goes through the translation process.

UPF supports NAT on the N4 interface to configure network addresses. The system is configured to automatically forward data packets encapsulating the source IP or source port address of the UE with NAT IP address and NAT port.

The supported NAT combinations include:

  • NAT44 On Demand Many to One

  • NAT44 On Demand One to One

  • NAT64 On Demand Many to One

  • NAT 64 On Demand One to One

  • NAT44 Not On Demand Many to One

  • NAT44 Not On Demand One to One

  • NAT64 Not On Demand Many to One

  • NAT64 Not On Demand One to One

For supplemental information about NAT, see the StarOS NAT Administration Guide.

NOTE: Not all features and/or functionality that are mentioned in the StarOS NAT Administration Guide are applicable to UPF.