Cisco Cisco Packet Data Gateway (PDG)

 

▄  SaMOG Administration Guide, StarOS Release 19 

This section describes the features and functions of inline services supported on the SaMOG Gateway.  

  The following features require the purchase of an additional feature license to implement the 

functionality with the SaMOG service. For more information on the feature licenses, contact your Cisco account 
representative. 

This section describes the following features:  



 

  

NAT translates non-routable private IP address(es) to routable public IP address(es) from a pool of public IP addresses 
that have been designated for NAT. This enables to conserve on the number of public IP addresses required to 
communicate with external networks, and 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. 

NAT works by inspecting both incoming and outgoing IP datagrams and, as needed, modifying the source IP address 
and port number in the IP header to reflect the configured NAT address mapping for outgoing datagrams. The reverse 
NAT translation is applied to incoming datagrams. 

NAT can be used to perform address translation for simple IP and mobile IP. NAT can be selectively applied/denied to 
different flows (5-tuple connections) originating from subscribers based on the flows' L3/L4 characteristics—Source-IP, 
Source-Port, Destination-IP, Destination-Port, and Protocol. 

NAT supports the following mappings:  



 

One-to-One 



 

Many-to-One 

  For more information on NAT, refer to the Network Address Translation Administration Guide.