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5 - 340 WiNG 5.6 Access Point System Reference Guide
Figure 5-227
Device Overrides - Add Destination NAT screen
15. Set or override the following
Destination
configuration parameters:
16. 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
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.
Destination IP
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.
Destination Port
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.
NAT IP
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.
NAT Port
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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