Digi Wi-Point 3G Guide de l'utilisateur

Digi Wi-Point 3G Application Guide

How to Create a VPN between a Wi-Point 3G and Linksys

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Scenario

Digi Wi-Point 3G is used for primary internet connectivity at a remote site. The remote

site needs a way to get data to and from an office location.

Theory of Operation

A remote site needs to be able to retrieve and send data to an office location from its

Ethernet and Wi-Fi enabled devices. The way to do this will be to setup a VPN tunnel

between the Wi-Point 3G and the Linksys VPN appliance at the office location, to

provide a secure tunnel to the office location.

Sample Diagram

Internet Cloud

PCs, PLCs, etc.

Servers, PCs, PLCs, etc.

Digi Wi-Point

Linksys VPN Appliance

WAN IP: 5.6.7.8

LAN IP: 192.168.1.1 WAN IP: 1.2.3.4

LAN IP: 10.1.254.1

Carrier Plan and PC / VPN Appliance Requirements

Digi Wi-Point 3G Requirements: Firmware version 1.1.34-8 or later is installed. To

download the latest firmware, go to http://www.digi.com/support.

GSM GPRS/EDGE APN Type needed: VPN and GRE end-points usually require static

(persistent) IP addresses and must support mobile terminated data connections. If mobile

termination is not an option with your current APN, you will need to acquire a new one

that does support mobile termination.

CDMA networks may also require special plans to provide static IP addresses and

support mobile terminated data connections.

Check with your wireless provider on the available plan types.

Digi Wi-Point 3G Application Guide –Linksys VPN Connection

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Digi Wi-Point 3G Configuration

1. Read and follow the quick-start guide for the Digi Wi-Point 3G. A link has been

provided: http://ftp1.digi.com/support/documentation/90000907_a.pdf

2. Assign a static IP address to the Ethernet port (the default address is 192.168.1.1).

Note the default gateway may show or change to an address such as 10.6.6.6. This is

normal as it is the cellular provider’s network default gateway.

3. Configure the Digi Wi-Point 3G settings:

a. Navigate to Configuration > Network > Virtual Private Network (VPN)

Settings in the web interface of the unit.

b. Ensure that button for Enabled is checked. If not, enable this feature and

Apply the setting.

c. Click VPN Tunnel Settings

i. Click the Add button to start creating the tunnel

ii. Fill in the appropriate information, shown in the following

screenshots:

Digi Wi-Point 3G Application Guide –Linksys VPN Connection

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iii. Click Apply to save the settings.

Digi Wi-Point 3G Application Guide –Linksys VPN Connection

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Linksys Configuration

1. Configure the Linksys VPN device:

a. Log into the web interface of the Linksys appliance, and navigate to the

VPN setup of the device.

i. For example, in the device used for this example, Linksys RV042,

the VPN setup is located on the toolbar at the top of the screen.

b. Click Add New Tunnel to add a new tunnel for configuration.

c. Choose the option for Gateway-to-Gateway for the type of tunnel to be

built. Click Add Now to start the tunnel configuration.

d. Fill in the appropriate information shown in the following screenshots:

Digi Wi-Point 3G Application Guide –Linksys VPN Connection

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e. Click Save Settings to save the settings.

Digi Wi-Point 3G Application Guide –Linksys VPN Connection

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ADDITIONAL NOTES

1. This configuration will work with Dynamic IP addresses, using hostnames

established with DynDNS.org. When using a Dynamic IP address, you will need to

set the VPN tunnel to use Aggressive Mode to make the connection work.

2. This configuration will work with other VPN parameters than what is listed in the

screenshots. i.e. –3DES

Where to Get More Information

Refer to the Digi Connect router user documentation and Digi technical support website

at www.digi.com/support for more information. Technical assistance is available at

http://www.digi.com/support/eservice/eservicelogin.jsp.

For sales and product information, please contact Digi International at 952-912-3444 or

refer to the Digi Connect wireless pages at www.digi.com.

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