Port Redirection - D-Link DSL-500 User Manual

In the Inbound Data Packet above, the Destination IP Address is the IP address
that is translated by NAT. The Source IP Address is the IP address of a computer
outside the private network. And the Data portion of the packet is the
information payload carried by the packet, in this case, web page contents.
Setting Local IP Addresses
When implementing NAT and thus creating a private network that is isolated
from the Internet, you can assign any IP addresses to host computers without
problems. However, the Internet Assigned Numbers Authority (IANA) has
reserved the following three blocks of IP Addresses specifically for private
networks:
It is recommended that you choose local IP addresses for use with NAT from the
private network IP addresses in the above list. For more information on address
assignment, refer to RFC 1597, Address Allocation for Private Internets and RFC
1466, Guidelines for Management of IP Address Space.

Port Redirection

The Port Redirection feature of the Router is used in conjunction with NAT to
improve security and efficiency. For example, this can be used to direct HTTP
packets to a designated HTTP server as a form of firewall protection for the LAN.
Class Beginning Address
A 10.0.0.0
B 172.16.0.0
C 192.168.0.0
Port Redirection Window
DSL-500 ADSL Router User's Guide
Ending Address
10.255.255.255
172.31.255.255
192.168.255.255
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