D-Link DFL-1500 [78/271] Many to many type

Part III

NAT & Routing

D-Link 70

translated from 192.168.40.1:2933 to 61.2.1.1:2933. In the same way, when the packets of Connection2 are forwarded out, its IP

address is still translated to the same public IP address (61.2.1.1:7896).

7.5.2 Many-to-Many type

Figure 7-5 NAT Many-to-Many type

As the above

Figure 7-5 illustrated, NAT Many-to-Many type means that many local PCs are translated into multiple public IP

addresses when the packets are forwarded out through the DFL-1500. Take Connection1 for example. Its IP address and port are

translated from 192.168.40.1:2933 to 61.2.1.1:2933. Until DFL-1500 uses out of all source ports of the public (61.2.1.1), DFL-1500

will then choose the second public IP (such as 61.2.1.2) from the address pool. For example, Connection2 are forwarded out, the

source IP address will be translated into the second public IP address (61.2.1.2) from the public IP address pools. So the translated

IP address (61.2.1.2:7896) is different from Connection1 one (61.2.1.1:2933).

7.5.3 One-to-One type