Article ID: 314066 - View products that this article applies to.
This article was previously published under Q314066
For a Microsoft Windows 2000 version of this article, see 237254
This article describes how to share one Internet connection on your home network or on your small-office network.
Through Internet Connection Sharing for network and dial-up connections, you can use Microsoft Windows XP to connect your home network or your small-office network to the Internet. For example, you may have a home network where a Windows XP-based computer can connect to the Internet by using a dial-up connection. If you enable Internet Connection Sharing on the computer that uses the dial-up connection, you can provide network address translation, addressing, and name resolution services for all the computers on your network.
Note that to enable Internet Connection Sharing, the Windows XP-based computer must have two connection devices. One device for the home network or small-office network, such as a network adapter, and one device for the Internet Connection, such as a modem or dedicated network adapter.
Setup proceduresTo enable Internet Connection Sharing on a network connection, follow theses steps:
Important When you enable Internet Connection Sharing, the network adapter that is connected to the home network or to the small-office network receives a new static IP address of 192.168.0.1, with a subnet mask of 255.255.255.0. Existing TCP/IP connections on the network may be lost and must be reestablished.
Configuration and usage issuesInternet Connection Sharing is intended for use in a small office or in a home office where the network configuration and the Internet connection are managed by the Windows XP-based computer where the shared connection resides. It is assumed that on this network, this computer is the only Internet connection, this computer is the only gateway to the Internet, and this computer sets up all internal network addresses. All hosts on the network except the Internet Connection Sharing host are expected to be configured to obtain an IP address and DNS configuration automatically.
You cannot modify the default network configuration after you enable Internet Connection Sharing. This includes changing the range of private IP addresses that are handed out (DHCP allocator), enabling DNS, disabling DNS, and configuring a range of public IP addresses.
If your home office users have to gain access to a corporate network that is connected to the Internet by a tunnel server, the users must create a virtual private network (VPN) connection to tunnel from the computer on the Internet Connection Sharing network to the corporate tunnel server on the Internet. The VPN connection is authenticated and secure. Creating the tunneled connection allocates correct IP addresses, DNS server addresses, and WINS server addresses for the corporate network.
For additional information about how to configure a VPN, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/305550/ )HOW TO: Configure a VPN connection to your corporate network in Windows XP Professional
You may have to configure programs and services to work correctly across the Internet. For example, if users on your home network want to play a game with other users on the Internet, the game must be configured on the connection where Internet Connection Sharing is enabled. Services that you provide must be configured so that Internet users can gain access to them.