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How can I
configure Internet Connection Sharing
(ICS) on my Windows XP computer?
This is a
step by step setup of how you get
Windows XP to use Internet Connection
Sharing or ICS.
These
instructions assume that when you have a
Cable Modem connection or an ADSL
connection (frankly, it can also be a
simple Dial-Up modem connection, but
that won't get you anywhere, would it?).
Let's
say you have the following LAN
configuration:
Internet
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212.143.143.12
(Real IP from ISP)
PRO1
(This will be the ICS computer)
192.168.0.1 (Bogus IP
- Configured by ICS)
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Switching Hub---------PRO2
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192.168.0.2 (Bogus IP - Configured
by ICS)
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192.168.0.3 (Bogus IP
- Configured by ICS)
PRO3
Instead of
a hub you could use a crossover cable to
the other computer but then you will
only be able to connect 2 computers, and
if you'd want more you'd need more NICs.
Step 1:
Configure Internet Connection Sharing
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Right
click "My Network Places" and select
"Properties".
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In
this window you should see an icon
for "Local Area Connection" and
"Local Area Connection 2" for both
of your NIC's.
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Right
click on the Network Area Connection
icon that connects to your Cable or
ADSL modem, and select "Properties"
from the drop down window.
If
you're using a modem to connect to
the Internet (just like in the
previous screenshot) you must right
click the icon that represents the
connection to the Internet.
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Click
on the Advanced tab.
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Check
the box next to "Allow other network
users to connect through this
computer's Internet connection" and
press "OK" to share your connection
through this NIC.
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You
will receive a warning window saying
that your NIC will automatically
receive an IP address of
192.168.0.1, and that if you have
other computers on your LAN that
have static IP addresses - you
should configure them to obtain it
automatically - otherwise you will
probably break the connection with
them.
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Acknowledge this warning.
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Back
at the "My Network Places" Window,
right click on your "Local Area
Connection 2" icon and select
Properties from the drop down menu.
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Check
the TCP/IP settings by double
clicking on the "Internet Protocol
(TCP/IP)" line, or highlight it and
then click the "Properties" button
beneath it.
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You
should make sure that your TCP/IP
properties looks exactly like this.
These
settings are auto configured by the ICS
service.
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