Motorola WiNG 5.7.1 System Reference Manual page 425

15. 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
Destination Port
NAT IP
NAT Port
Figure 5-228 Device Overrides - Add Destination NAT screen
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.
Use the spinner control to set the local port number used at the (source) end of the static
NAT configuration. The default value is port 1.
Enter the IP address of the matching packet to the specified value. The IP address modified
can be either source or destination based on the direction specified.
Select this option and enter the port number of the matching packet to the specified value.
This option is valid only if the direction specified is destination.
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