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By Chris De Herrera 
Copyright 1998-2007
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Sharing a Cable or DSL Connection with your PC Companion
By Chris De Herrera, Copyright 2000
 Version 1.00  Revised 10/30/2000

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Introduction

Most cable modems and ADSL systems only offer access to one computer at a time. There are other devices that allow you to have multiple computers which connect to the internet using the cable or ADSL modem at the same time. These devices are commonly called routers and they support NAT (Network Address Translation), DHCP which automatically configures PCs with IP addresses.

Devices

Linksys Cable/DSL Router - I have personally used this router and it works well.  Other vendors offer similar features and they should work as well.

Connecting a Cable/DSL Router

Follow the directions provided to connect the router to the network connection from your cable/adsl modem. Some devices may require a cross over cable depending on the pin out. Once you have connected the router, you need to configure it to work with your service. This includes configuring the router to match the settings for your service provider.

Service Providers

RoadRunner - DHCP assigned IP address, optional static IP address at additional cost
Pacific Bell ADSL - PPPoE - requires username and password, optional static IP at additional cost

Other service providers may have different services.  Refer to your service provider's information for details.

Configuring the Internal Network

By using the router, it converts requests from the internal network to the external one. You need to configure the IP address of the router and subnet for the internal network. I recommend using 192.168.1.1and the subnet of 255.255.255.0. This is in compliance with RFC 1918 which specifies what IP addresses you can use for networks that are not connected directly to the internet to avoid duplicate IP addresses.

Known Issues

DHCP may not work properly with all devices and PC Companions.  If this occurs, I recommend that you use a static IP address instead.  You will also need to enter the appropriate DNS entries as well in the Ethernet Configuration.  Don't forget to configure the default gateway to point to the internal address of the router.

Install a Ping utility from the Network Utilities FAQ so you can ping the desktop from the Pocket PC. If you are unable to ping the desktop, then try to ping your gateway. If you can not ping either device, then check your hardware connections.

ActiveSync

You can also use ActiveSync to synchronize over the LAN. Just enter the IP address of the desktop as the WINS server on the PC Companion.

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