NAT (Network Address Translation) is used to pass data from one IP address in one network to another IP address on a another network. Thus, the EIPR translates a WAN-side IP address to a specific LAN-side IP address. The firewall within the EIPR will block all communications originated on the WAN side - unless you specify exceptions. Enter the LAN device address in the NAT LAN IP Address boxes. In the WAN IP Address boxes, enter the address you want it to "appear as" on the WAN side. For example, if you want LAN device 192.168.1.2 to appear on the WAN network as 1.2.3.4 then put 192.168.1.2 in the LAN IP Address boxes and 1.2.3.4 in the WAN IP Address boxes - then enable this entry.
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