|
Figure 26.1 |
Illustration of how NAT is used. A device running NAT is placed on the connection between a site and the Internet. |
|
|
Figure 26.2 |
Illustration of basic NAT translation. NAT rewrites the source address in outgoing datagrams and the destination address in incoming datagrams. |
|
|
Figure 26.3 |
An example NAT translation table for the mapping illustrated in Figure 26.2. An entry specifies the direction of packet flow and the changes that should occur. |
|
|
Figure 26.4 |
An example NAPT translation table for TCP connections from private computers 10.0.0.1 and 10.0.0.2. NAPT changes both the IP source address and TCP port number. In the example, both connections use TCP source port 30000 (unlikely, but possible). |
|
|
Figure 26.5 |
Illustration of a dedicated NAT device that provides connections for multiple computers. The NAT box connects to an ISP (e.g., through a DSL connection or a cable modem). |
