Port Forwarding allows an IP port from one network to be used in another network. It is sometimes called port mapping. The firewall within the EIPR will block all communications originated on the WAN side. To pass certain messages through the firewall, use port forwarding. In the WAN IP Port box, enter the WAN IP port number to be forwarded - then select the IP protocols to be forwarded: TCP, UDP or Both. Next enter the IP address of the computer on the LAN side which will receive these messages and the IP port (LAN IP Port) to which the messages will be addressed. Selecting Enable will cause the EIPR to utilize the entry.

NAT Loopback provides the ability to have a request originating from an EIPR LAN side device using the WAN IP address redirect back to an internal device as indicated by the port forwarding entries. For example, this can be used to create a hyperlink using the WAN IP address that can work from either of the LAN side or the WAN side of the EIPR.

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