Windows XP Professional and Home Edition come with a great service, Internet Connection Sharing which allows a home user to share an always-on connection with security and without buying a license for expensive firewall software. Even a dial-up link cans providing network address translation, addressing, and name resolution services for all the computers on your network plus security.

Now this article basically describes how to set up and use the Internet Connection Sharing feature in Microsoft Windows XP. For this Internet Connection Sharing, you can use networked computers to share a single connection to the Internet.

Procedure to use Internet Connection Sharing
For use Internet Connection Sharing to share your Internet connection, you must have a host computer with one network adapter that is configured to connect to the internal network and one network adapter or modem which is configured to connect to the Internet.

In your Host Computer
Host computer, follow these steps to share the Internet connection:
1. At first log on to the host computer as Administrator or as Owner.
2. After that click on the Start button, and then click Control Panel.
3. Now click Network and Internet Connections.
4. And now click on the Network Connections, after that Right-click the connection that you use to connect to the Internet. Click Properties.
5. Now click on the advanced tab, Under Internet Connection Sharing, you have to select the Allow other network users to connect through this computer’s Internet connection check box.
6. If you want to share a dial-up Internet connection, then select the Establish a dial-up connection whenever a computer on my network attempts to access the Internet check box to permit your computer to automatically connect to the Internet.
7. Finally click on the OK button and you receive the following message:
When Internet Connection Sharing is enabled, your LAN adapter will be set to use IP
address 192.168.0.1, and then your computer may lose connectivity with other computers on
your network. If these other computers have static IP addresses, then it is a good idea to set them to obtain their IP addresses automatically.
8. Now click on the Yes button

The connection to the Internet is shared to other computers on the local area network (LAN) and network adapter that is connected to the LAN is configured with a static IP address of 192.168.0.1 and a subnet mask of 255.255.255.0
Now you want to view a video about how to configure the host computer for Internet Connection Sharing, then click on the Play button.

In your client computer
If you want to connect internet by using the shared connection, then you must confirm the LAN adapter IP configuration at first, and then configure the client computer. Now To confirm the LAN adapter IP configuration, follow these steps:
1. First log on to the client computer as Administrator or as Owner.
2. Then click Start, and click on the Control Panel.
3. After that, click Network and Internet Connections and click on the internet connection.
4. Then, right-click to the Local Area Connection, and click Properties.
5. Now you have to click on the General tab, click Internet Protocol (TCP/IP) in this connection uses the following items list, and then click Properties.
6. Now In the Internet Protocol (TCP/IP) Properties dialog box, click Obtain an IP address automatically (if it is not already selected), and click on the OK button.
7. Finally, in the Local Area Connection Properties dialog box, and click OK.
8. Quit the Control Panel.
If you want to view a video about how to confirm the LAN adapter IP configuration, then click the Play button.

Troubleshooting
If you turn on Internet Connection Sharing on the host computer, then the host computer’s LAN adapter is automatically assigned the IP address of 192.168.0.1 and one of the following situations may occur:
• IP address conflict
• Loss of network connectivity