NetComm Vodafone MachineLink 3G User manual

Vodafone MachineLink 3G
Port Forwarding / DMZ
Configuration Guide

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Vodafone MachineLink 3G – Remote Administration / DMZ Configuration Guide
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Copyright
Copyright© 2013 NetComm Wireless Limited. All rights reserved.
Copyright© 2013 Vodafone Group Plc. All rights reserved.
The information contained herein is proprietary to NetComm Wireless and Vodafone. No part of this document may be translated, transcribed,
reproduced, in any form, or by any means without prior written consent of NetComm Wireless and Vodafone.
Please note: This document is subject to change without notice.
DOCUMENT VERSION DATE
Initial document release March 2013
Table 1 - Document Revision History
Note: Before performing the instructions in this guide, please ensure that you have the latest firmware version installed on your router.
Visit http://vodafone.netcommwireless.com to download the latest firmware.
Note: The functions described in this document require that the router is assigned with a publicly routable IP address. Please ensure that
your mobile carrier has provided you with a publicly routable IP address before performing the instructions in this document.

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Vodafone MachineLink 3G –
Remote Administration / DMZ Configuration Guide
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Table of contents
Introduction ..................................................................................................................................................................................................................................................................................4
Adding a Port Forwarding Rule............................................................................................................................................................................................................................................................ 5
Placing a device in the Demilitarized Zone (DMZ)........................................................................................................................................................................................................................8

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Introduction
Port forwarding enables programs or devices running on your LAN to communicate with the internet as if they were directly connected. Many
internet services and applications use designated ports and when packets arrive at the router, they will be lost unless they are directed to the
appropriate destination. Port forwarding works by forwarding a specific TCP or UDP port or range of ports from the modem/router to the computer
or device you are using.
There might also be times when you wish to place a device connected to your router in the “demilitarized zone” or “DMZ”. A device placed in the
DMZ will have all port numbers forwarded to it, giving it unrestricted access to the internet.
Each service or application generally uses different TCP or UDP ports. Refer to the documentation for the service or application to find
out which ports need to be forwarded.
You can only forward a port or range of ports to a single destination (IP address). In some cases, this may cause issues where multiple
LAN devices attempt to use a service simultaneously. Where possible, use an alternate port for any subsequent connections after the
first device. Please consult your service provider or application developer for assistance with this.
This document explains how to configure port forwarding and DMZ on the Vodafone MachineLink 3G Router so that a computer running Microsoft
Remote Desktop Server can be accessed remotely. This is one example of how port forwarding and the demilitarized zone may be used, however
there are many other uses for these features. The diagram below illustrates the example scenario.
Figure 1: Example network diagram

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Vodafone MachineLink 3G –
Remote Administration / DMZ Configuration Guide
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Adding a Port Forwarding Rule
This guide will take you through the steps required to add a port forwarding rule to your router.
1. Open a web browser and navigate to the LAN IP address of the MachineLink 3G Router. The default is http://192.168.1.1.
Log in to the router with the following credentials:
Username: root
Password: admin
Figure 2: Login page
2. From the menu bar along the top of the screen, click on Networking then click the Routing item on the left and finally click the Port
forwarding link.
Figure 3: Internet Settings - Routing – NAT

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Vodafone MachineLink 3G – Remote Administration / DMZ Configuration Guide
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3. Click the +Add button to begin configuring a new port forwarding rule.
Figure 4: Port forwarding list
4. Using the Protocol drop down list, select the protocol type to use for the rule. You can select TCP, UDP or All.
Figure 5: Port forwarding settings
5. In the Source IP address field, enter the address from which the traffic will originate. This is usually a WAN IP address originating from
the internet. In this example, we have set the Source IP address to 0.0.0.0 which allows connections from anywhere.
6. In the Source port range fields, enter the range of ports to forward from the source. For example, entering 6881 in the first field and
6999 in the second field will forward the 19 ports between and including 6881 and 6999. If you wish to forward a single port, enter the
same port number in both the first and the second fields.
7. In the Destination IP address field, enter the local IP address of the LAN client to which port traffic will be forwarded.
8. In the Destination port range fields, enter the port range for the destination. In many cases these ports will be the same as the Source
port range. If you wish to specify a single port, enter the same port number in both the first and the second fields.
9. Click the Save button. The port forwarding rule is displayed at the bottom of the screen as highlighted in Figure 4 below.
Figure 6: Port fowarding rule added successfully.

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Vodafone MachineLink 3G –
Remote Administration / DMZ Configuration Guide
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Verifying the Port Forwarding rule
In the example above, we forwarded port 3389 which is the default port for Microsoft’s Remote Desktop Protocol (RDP). The client machine
(192.168.1.10) is accepting Remote Desktop connections on port 3389 so we can verify the connection by connecting to the client using RDP. We
need to connect to the WAN IP address of the router and our request is forwarded on to the client (192.168.1.10). The WAN IP Address can be
found by viewing the Status page of the Vodafone MachineLink 3G Router as shown below:
Figure 7: The Status page showing the WAN IP Address
1. Click Start then Run and type mstsc and press Enter.
2. Type the WAN IP address of the remote router and click Connect.
Figure 8: RDP Connection screen
The remote desktop opens and prompts you to login. If it does not, verify your settings and try again.

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Placing a device in the Demilitarized Zone (DMZ)
A device connected to the router may be placed in the DMZ which gives it unrestricted access to the internet. All ports are forwarded to the device
when it is in the DMZ. Placing a device in the DMZ can be useful for testing certain scenarios but is also risky since it puts the client device in a
vulnerable position.
Note: Placing a device in the DMZ puts it in a vulnerable position and is open to potential threats from the internet. It is not
recommended that you leave a device in the DMZ during normal operation.
To place a device in the DMZ:
1. Open a web browser and navigate to the LAN IP address of the MachineLink 3G Router. The default is http://192.168.1.1.
Log in to the router with the following credentials:
Username: root
Password: admin
Figure 9: Login page
2. From the menu bar along the top of the screen, click on Networking then click the Routing item on the left and finally click the DMZ
link.
Figure 10: Internet Settings - Routing – NAT

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3. Click the DMZ toggle key to switch it to the ON position.
Figure 11: DMZ Settings
4. Enter the Local IP address of the device that you want to place in the demilitarized zone.
5. Click the Save button. The IP address you entered will have all ports forwarded to it.

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Vodafone MachineLink 3G – Remote Administration / DMZ Configuration Guide
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Verifying the DMZ
In the example above, we placed the client machine on 192.168.1.10 in the demilitarized zone. This means that all ports are forwarded directly to
it. To test that it is in the DMZ, we can connect to the WAN IP Address using RDP. The WAN IP Address can be found by viewing the Status page of
the Vodafone MachineLink 3G Router as shown below:
Figure 12: The Status page showing the WAN IP Address
1. Click Start then Run and type mstsc and press Enter.
2. Type the WAN IP address of the client and click Connect.
Figure 13 - RDP Connection screen
The remote desktop opens and prompts you to login. If it does not, verify your settings and try again.