Netopia / Eircom -- Address Forwarding (IP Maps)

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IP Maps (Address Forwarding)	IEQG_024
IP Maps allow multiple static WAN IP addresses, up to a maximum of 10 addresses, to be assigned to the Netopia gateway. Static WAN IP addresses are used to support specific services, like a web server, mail server, or DNS server. This is accomplished by mapping a separate static WAN IP address to a specific internal LAN IP address. All traffic arriving at the gateway intended for the static IP address is transferred to the internal device. All outbound traffic from the internal device appears to originate from the static IP address. This supports locally hosted servers on a public IP address while protecting LAN users behind the NAT IP address. PLEASE NOTE: From the LAN (Local Area Network), you will also be able to access the servers that are responding to requests from the internet, but only using the internal private IP address. Access via the public IP address is not supported from a local ethernet connection. This technote will guide you through the setup process for this feature in your Netopia.
Related documents: IEQG_025 Port Forwarding

Firmware Reference

v7.2 R1 through v7.4.2 -- Netopia 3347W

v7.4.2 R2 and later -- Netopia 3347NWG

Before You Start

Browse into the Netopia's web interface at http://192.168.1.254 (if using the default IP setting). If your network has a different IP addressing scheme, modify this accordingly.
Your Netopia Eircom Gateway home screen will appear. If your router is running the latest Eircom approved firmware, you will see an opening screen similar to the image below on the right. Instructions pertaining to this technote will follow immediately after this introduction.
Routers running firmware prior to version 7.4.2 R2 will have a home screen similar to the image on the left. Click on the caption bar below the screen shot to go directly to those instructions.

v7.2 R1 thru v7.4.2 -- Netopia 3300 Series v7.4.2 R2 and later -- Netopia 3300 Series

Configuration -- v7.4.2 R2 and later

Click on Custom Services in the L/H Menu.

Click on Static NAT button.

The Static NAT IP Address field will display the IP Address of each computer on the local network. Select the address to which you want to send this traffic.
Click on Next.

Click on Static NAT button.

You will be prompted to retart the router for the changes to take. Confirm this action.
The router will reboot with the new NAT Default Host.

Conclusion

You've now configured your Netopia Router for static IP Mapping.
Be sure to restart the router for these changes to take effect.