Netopia 6.3 manual Configure Specific Pinholes, Planning for Your Pinholes

Section 4 Configure

Configure Specific Pinholes

Planning for Your Pinholes

Determine if any of the service applications that you want to provide on your LAN stations utilize TCP or UDP protocols. If an application does, then you must configure an Internal Server to implement port forwarding.

This is accessed from the Advanced -> Internal Servers page.

Example: A LAN Requiring Three Pinholes

The procedure on the following pages describes how you set up your NAT- enabled Cayman Gateway to support three separate applications. This requires passing three kinds of specific IP traffic through to your LAN.

Application 1: You have a Web server located on your LAN behind your Cayman Gateway and would like users on the Internet to have access to it. With NAT “On”, the only externally visible IP address on your network is the Gateway’s WAN IP (supplied by your Service Provider). All traffic intended for that LAN Web server must be directed to that IP address.

Application 2: You want one of your LAN stations to act as the “central repository” for all email for all of the LAN users.

Application 3: One of your LAN stations is specially configured for game applications. Again, you want this specific LAN station to be dedicated to games.

A sample table to plan the desired pinholes is:

WAN Traffic Type	Protocol	Pinhole Name	LAN Internal IP Address
Web	TCP	my-webserver	192.168.1.1
Email	TCP	my-mailserver	192.168.1.2
Games	UDP	my-games	192.168.1.3

For this example, Internet protocols TCP and UDP must be passed through the NAT security feature and the Gateway’s embedded Web (HTTP) port must be re-assigned by configuring new settings on the Internal Servers page.

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