The following table lists terms and definitions used in this NAT configuration discussion.
NAT Configuration Terms and Definitions
| Term | Definition |
|---|---|
| Basic NAT | Refers to Network Address Translation (NAT) only. |
| Dynamic Address Binding | Provides a binding based upon an internal algorithm between an address from an access-list of local addresses to an address from a pool of global addresses for NAT and TCP/UDP port number translations for NAPT. |
| Dynamic Nat Firewall | A NAT feature that protects members of the inside network from access from outside network clients for which a dynamic NAT firewall binding does not exist, while at the same time allowing outside traffic not destined to the inside network to flow freely. |
| Inside (private) address | An IP address internal to the network only reachable by the external network by translation. |
| List Rule (Dynamic Rule) | Defines a relation between an access-list used to match NAT inside addresses and a NAT pool to dynamically allocate NAT outside addresses from. |
| NAT Address Pool | A grouping of global addresses used by both NAT and NAPT dynamic address binding. |
| NAT Binding | Defines a logical mapping between two stations and the NAT router. |
| NAT Cone | Configures a NAT binding that allows any server, a specific server and any port, or a specific server and port, depending upon the configured NAT cone type, access to an internal network client using the external network address. |
| NAT Hairpinning | Allows an internal client to forward packets to another internal client using the destination internal client‘s global NAT address. |
| Network Address Port Translation (NAPT) | Provides a mechanism to connect a realm with private addresses to an external realm with globally unique registered addresses by mapping many network addresses, along with their associated TCP/UDP ports into a single network address and its associated TCP/UDP ports. |
| Network Address Translation (NAT) | Provides a mechanism to connect an internal realm with private addresses to an external realm with globally unique registered addresses by mapping IP addresses from one group to another, transparent to the end user. |
| Outside (public) address | A registered global IP address external to the private network that the inside address is translated to. |
| Static Address Binding | Provides a one-to-one binding between local addresses to global addresses for NAT and TCP/UDP port number translations for NAPT. |
| Static Rule | Defines a mapping between a local-ip and a global-ip with optional protocol and port definitions. |
| Traditional NAT | Refers to both NAT and NAPT. |
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