User`s manual

EDR-G903/G902 Features and Functions
3-31
1-to-1 NAT
If the internal device and external device need to communicate with each other, choose 1-to-1 NAT, which
offers bi-directional communication (N-to-1 and Port forwarding are both single-directional communication
NAT functions).
1-to-1 NAT is usually used when you have a group of internal servers with private IP addresses that must
connect to the external network. You can use 1-to-1 NAT to map the internal servers to public IP addresses.
The IP address of the internal device will not change.
The figure below illustrates how a user could extend production lines, and use the same private IP addresses
of internal devices in each production line. The internal private IP addresses of these devices will map to
different public IP addresses. Configuring a group of devices for 1-to-1 NAT is easy and straightforward.
1-to-1 NAT Setting for EDR-G903 in Production Line 1
1-to-1 NAT Setting for EDR-G903 in Production Line 2