D-Link DI-206 - Manual (Page 98)

DI-206 ISDN Remote Router
86 Configuration and
Management
example IP addresses listed in the table below and the network diagram
shown on page 84.
Global IP Addresses
(for use with NAT) Local IP Addresses
(assigned to computers
on the local network)
200.100.50.1 192.168.100.2
200.100.50.2 192.168.100.3
200.100.50.3 192.168.100.4
200.100.50.4 192.168.100.5
200.100.50.5 192.168.100.6
192.168.100.7
192.168.100.8
192.168.100.9
192.168.100.10
Please note that in the above table there are 9 users on the local
network using 5 global IP addresses to access the Internet.
When a packet on the local network arrives at the router and needs to
be sent to the Internet, NAT will change the source IP address (for
example 192.168.100.2) to a global address (200.100.50.1, for
example). If this packet generates a reply (as for example, a request to
view a web page will), NAT will change the destination IP address on
the reply packet back to the local IP address for delivery to the
machine on the local (stub) network.
The difference between static and dynamic NAT is that once the five
global addresses are manually assigned when using static NAT, they
will never change. The only way to change them is by using the console
program to manually reassign them. When using dynamic NAT, the
router will map a local IP address to a global IP address whenever a