Motorola WiNG 5 System Reference Manual page 329

12. Set or override the following
Static NAT creates a permanent, one-to-one mapping between an address on an internal network and a perimeter or
external network. To share a Web server on a perimeter interface with the Internet, use static address translation to
map the actual address to a registered IP address. Static address translation hides the actual address of the server
from users on insecure interfaces. Casual access by unauthorized users becomes much more difficult. Static NAT
requires a dedicated address on the outside network for each host.
Protocol
Destination IP
Figure 5-151 Destination NAT screen
Destination configuration parameters:
Select the protocol for use with static translation. TCP, UDP and Any are
available options. TCP is a transport layer protocol used by applications
requiring guaranteed delivery. It's a sliding window protocol handling both
timeouts and retransmissions. TCP establishes a full duplex virtual
connection between two endpoints. Each endpoint is defined by an IP
address and a TCP port number. The User Datagram Protocol (UDP) offers
only a minimal transport service, non-guaranteed datagram delivery, and
provides applications direct access to the datagram service of the IP layer.
UDP is used by applications not requiring the level of service of TCP or are
using communications services (multicast or broadcast delivery) not
available from TCP. The default setting is Any.
Enter the local address used at the (source) end of the static NAT
configuration. This address (once translated) will not be exposed to the
outside world when the translation address is used to interact with the
remote destination.
Device Configuration 5 - 269