Hi
Maybe this will help:
Reference Link:
http://support.microsoft.com/default.aspx?scid=kb;en-us;307311&Product=win20
00
How To Set Up Internet Connection Sharing in Windows 2000
===============================================
IN THIS TASK
o SUMMARY
o How to Install a Second Ethernet Network Adapter to the ICS Host Computer
o How to Configure the ICS Host Computer
o How to Configure the Windows 2000 Client
o ICS and Dial-up Networking
o Troubleshooting
o REFERENCES
SUMMARY
========
Internet Connection Sharing (ICS) enables you to use Windows 2000
Professional to connect a small office network or home network with the
Internet. ICS provides network address translation (NAT), IP addressing,
and name resolution services for all the computers on a small network. This
step-by-step article describes how to install ICS on Windows 2000
Professional operating systems.
The following hardware or software is required for this procedure:
o DSL or cable modem connected to an Internet Service Provider (ISP) and
an activated DSL or cable account.
o Two installed network adapters. This article describes how to install a
second network adapter.
o The network is already configured with functioning TCP/IP.
How to Install a Second Ethernet Network Adapter to the ICS Host Computer
==========================================================================
To install another Ethernet adapter to the ICS host computer, you must log
on as a member of the Administrators group.
1. Shut down your computer properly, and then physically add the network
adapter.
2. Restart your computer.
3. When the Found New Hardware dialog box is displayed that lists the name
of the network adapter that you installed, click Next.
4. Click Next on the Install Hardware Device Drivers page.
5. On the Locate Driver Files page, click the media option that contains
the drivers for the network adapter that you are installing, for example,
CD-ROM drive, Floppy drive or Hard Drive Directory.
6. On the Driver Files Search Results page, click Finish.
NOTE: When you click Finish, the installation of the network adapter that
you just installed is completed.
How to Configure the ICS Host Computer
=====================================
The ICS host computer provides a connection through the second network
adapter to the existing TCP/IP network. Log on as member of the
Administrators group to set up the ICS host computer.
1. Click Start, click Settings, and then click Network and Dial-up
Connections.
2. Right-click Local Area Connection (the network card that you just
installed), and then rename it "The Internet Connection".
In the Network and Dial-up Connections dialog box, two connections are
displayed (for different network adapters), The Internet Connection and
Local Area Connection.
3. Right-click The Internet Connection and click Properties.
4. Click the General tab, and then verify that Client for Microsoft
Networks and Internet Protocol (TCP/IP) are displayed.
5. Click the Sharing tab, and then click to select the Enable Internet
Connection Sharing for this Connection check box.
NOTE: Make sure that firewall software or other Internet sharing software
from a third-party manufacturer has been removed.
6. Click OK and exit to the desktop.
How to Configure the Windows 2000 Client
===========================================
Log on as a member of the Administrators group to set up the Windows 2000
Professional clients that will share the Internet.
1. Click Start, select Settings, and then click Network and Dial-up
Connections.
2. Right-click Local Area Connection and click Properties.
3. Click the General tab, and then verify that Client for Microsoft
Networks and Internet Protocol (TCP/IP) are displayed.
4. Click Internet Protocol (TCP/IP), and then click Properties.
5. Click Obtain an IP address automatically, and then click Obtain DNS
server address automatically (if these options are not already selected).
6. Click Advanced, and then make sure that the various lists on the IP
Settings, DNS, and WINS tabs are all empty.
ICS provides these settings.
7. Click OK and exit to the desktop.
ICS and Dial-up Networking
==========================
You can use Dial-up Networking (DUN) to connect to the Internet; however,
DUN typically has a lower bandwidth connection to the Internet. This
connection is not as useful when multiple computers share the connection.
In addition, DUN is not persistent (you have to dial up and make a
connection) and can cause initial delays when you connect to hosts on the
Internet. For additional information about how to use ICS with DUN, click
the article number below to view the article in the Microsoft Knowledge
Base:
237254 - How to Enable Internet Connection Sharing on Network Connections
http://support.microsoft.com/default.aspx?scid=kb;EN-US;237254
Troubleshooting
===============
The following list describes how to prevent issues from occurring when you
configure ICS:
o Do not connect a hub directly to your DSL or cable modem. If you do so,
your internal network is vulnerable to other computers located on the
Internet. If you do connect a computer directly to a DSL or cable modem,
you must disable file and printer sharing to limit your vulnerability from
the Internet. However, when you do so, your network is prevented from
sharing files and printers, which may be your primary reason for networking
in the first place.
o Check that firewall software or other Internet sharing software from
third-party manufacturers has been removed. Make sure that only the
ICS-enabled computer is providing IP addresses, forwarding DNS names, or
acting as a default gateway. If not, ICS may not work or you may have
unexpected consequences.
o You cannot modify the configuration of ICS. For example, you cannot
prevent ICS from allocating IP addresses or modify the IP addresses that
ICS has allocated. If these features are required, you must run Network
Address Translation (NAT) instead.
o The ICS computer automatically assigns IP addresses, forwards DNS names
to the Internet for name resolution and assigns itself as the default
gateway for connecting to the Internet. If the ICS-enabled computer is
unavailable, other client computers on your network are unable to access
the Internet.
o When you configure your network to use the TCP/IP protocol, remove
instances of the NetBEUI protocol when you find them. NetBEUI is not
necessary and may slow down the network.
REFERENCES
=========
For additional information about ICS, refer to the Windows 2000
Professional Resource Kit that is located at the following Microsoft Web
site:
http://www.microsoft.com/windows2000/techinfo/reskit/en/ProRK/prcg_cnd_ezeh.
htm
The information in this article applies to:
o Microsoft Windows 2000 Server
o Microsoft Windows 2000 Professional
Shilpa Sinha
This posting is provided "AS IS" with no warranties, and confers no rights.
