User's Manual

Configuring Network Address Translation
308625-14.00 Rev 00
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Figure 2-7. N-to-1 Translation (Global to Local)
3. Subsequently, NAT receives a packet on the global interface with the
destination address 192.1.1.1 and port number 54000. Determining that the
destination address is an N-to-1 address, NAT uses the address and the port
number to locate the destination host, host B. NAT replaces the global
destination address and TCP port number with the local address and port
number and transmits the packet on the local interface.
IP0076A
NAT
N-to-1 translator
Global destination address: 192.1.1.1
Port: 12000
Local destination address: 55.0.0.1
Port: 2001
Global destination
address: 192.1.1.1
Port: 54000
Local destination
address: 55.0.0.2
Port: 2222
Host A Host B
Host A Host B
NAT
N-to-1 translator