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Configure Specific Pinholes. Planning for Your Pinholes.

Determine if any

of the service applications that you want to provide on your LAN stations use TCP or UDP

protocols. If an application does, then you must configure a pinhole to implement port for-

warding. This is accessed from the

Advanced -> Pinholes

page.

Example: A LAN Requiring Three Pinholes .

The procedure on the following

pages describes how you set up your NAT-enabled Netopia Gateway to support three sepa-

rate applications. This requires passing three kinds of specific IP traffic through to your

LAN.

:

You have a Web server located on your LAN behind your Netopia 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 Pro-

vider). All traffic intended for that LAN Web server must be directed to that IP address.

: You want one of your LAN stations to act as the “central repository” for all

email for all of the LAN users.

: One of your LAN stations is specially configured for game applications. You

want this specific LAN station to be dedicated to games.

A sample table to plan the desired pinholes is:

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.

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

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Configure

☛

TIPS

for making Pinhole Entries:

1. If the port forwarding feature is required for Web services, ensure that the

embedded Web server’s port number is re-assigned PRIOR to any Pinhole

data entry.

2. Enter data for one Pinhole at a time.

3. Use a unique name for each Pinhole. If you choose a duplicate name, it will

overwrite the previous information without warning.

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A diagram of this LAN example is:

You can also use the LAN-side address of the Gateway, 192.168.1.x:8100 to access the

web and 192.168.1.x:23 to access the telnet server.

WAN

LAN

Ethernet

Interface

192.168.1.1

192.168.1.2

192.168.1.3

my-webserver

my-mailserver

my-games

Gateway

NAT

NAT Pinholes

Embedded

Web Server

210.219.41.20

210.219.41.20:8100

Ethernet

Interface

Internet

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Configure

Pinhole Configuration Procedure.

Use the following steps:

1.

From the

toolbar button ->

link, select the

link.

Since Port Forwarding is required for this example, the Netopia embedded Web server

is configured first.

☛

NOTE:

The two text boxes,

Web (HTTP) Server Port

and

Telnet Server Port

, on this

page refer to the port numbers of the Netopia Gateway’s

embedded admin-

istration ports

.

To pass Web traffic through to your LAN station(s), select a Web (HTTP) Port number that is

greater than 1024. In this example, you choose 8100.

2.

Type

in the Web (HTTP) Server Port text box.

3.

Click the

button.

4.

Click

. Select the

link to go to the Pinhole page.

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5.

Click

. Type your specific data into the Pinhole Entries table of this

page. Click

.

6.

Click on the

link. Click the

button. Add the

next Pinhole. Type the specific data for the second Pinhole.