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System Configuration
23
Three types of NAT (Network Address Translation) service are provided by ADE-
4000.
NAT
NAT option only maps single WAN IP address to the local PC IP address. This is
peer-to-peer mapping (1 on 1). For each PVC, only one local PC IP address can be
associated with each WAN PVC. If more than one IP address is inserted for one
NAT session, only the first IP address of each session takes effect.
NAPT
NAPT option maps the IP address and UDP/TCP port ID of the WAN PVC to the IP
address and UDP/TCP port ID of the local PCs. (1 to N). It is the multiple-mapping
mechanism. More than one local PC can be associated with one WAN PVC.
The setting procedures are as follows:
Dynamic NAPT
Dynamic NAPT option maps the IP address and UDP/TCP port ID of the WAN
PVC to the IP address and UDP/TCP port ID of the local PCs. (1 to N). It is the
multiple-mapping mechanism, and it is dynamically allocated, this provides more
functionality for Internet application under a NAT networking environment.
The setting procedures are as follows:
Figure 4-18: NAPT configuration screen