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Windows 7: Internet Connection Sharing - Enable

Internet Connection Sharing - Enable

How to Enable Internet Connection Sharing in Windows 7
Published by severedsolo
06 Apr 2010
Published by

How to Enable Internet Connection Sharing in Windows 7

Note   Note
this method can only be used with PC's connected via Ethernet cable (not wirelessly) as usually if you connect to a wireless "ad-hoc" (PC to PC) connection you cannot connect to the internet too although my connection to the internet in this tutorial is shown as wireless, the PC i am connecting to is connected to my PC via "crossover" cable.

In order for the 2nd PC to be able to "share" the connection the PC which connects to the internet must be switched on and connected

1. First, connect the PC you wish to share the connection with to your windows 7 machine, by ethernet "crossover" cable

2. next, click the "network" button on the taskbar, and open Network and Sharing centre (yours may look different, mine signifies a wireless network, yours will most likely be a PC with a plug next to it)

3. Click "change adapter settings" on the left hand side and then right click your Local Area Connection (NOT WIRELESS even if this is the method you use to connect to the internet, we are setting up sharing for the Local Area Connection network), and select properties

4. Under the "Sharing" tab, select "allow other network users to connect through this computers internet connection" and then select the connection through which your PC connects to the internet (in my case wireless)

then with a little luck, you should be able to connect to the internet through both PC's at once!

information   Information
This tutorial is the intellectual property of (c)2009 Martin Joy a.k.a severedsolo and is only authorised to be hosted on This tutorial is not to be copied without my explicit consent and when consent is granted the original author must be credited along with a link to this tutorial
06 Apr 2010   #1

Windows 7 Profesional x86, Mac OS X 10.6 Snow Leopard

Nice tutorial!

My System SpecsSystem Spec
06 Apr 2010   #2

Windows 7 Ultimate 32-bit

excellent one!
My System SpecsSystem Spec
10 Apr 2010   #3

Windows 7 Ultimate
ICS error message

Hi severedsolo,

I tried to enable ICS using the process you described but got the message:

‘An error occurred while Internet Connection Sharing was being enabled.


Any ideas about what I need to do to resolve this?

My System SpecsSystem Spec

10 Apr 2010   #4

Windows 7 Ultimate X64 SP1

Hi Batman, have a look at this: An Error Occurred While Trying To Setup ICS see if it helps

also according to this website: turning on windows firewall should fix it, (you will need to disable whatever firewall your using at the moment to test this) but i cant say i have ran across this issue so can't verify that
My System SpecsSystem Spec
11 Apr 2010   #5

Windows 7

When i follow the guide it comes back in the Lan "No Internet Access"
any ideas please ?
My System SpecsSystem Spec
11 Apr 2010   #6

Windows 7 Ultimate (x64) SP1

If the PC that has the modem connected to it also has a wireless LAN adapter attached (either internal or USB) then other PCs can connect to the internet via ICS (as long as they too have wireless LAN). I have set this up successfully a few times.
The LAN adapter just needs a static IP and on the others, just set this IP as the gateway.
My System SpecsSystem Spec
11 Apr 2010   #7

Windows 7 Ultimate X64 SP1

thanks for the tip tw33k, I have never done it wirelessly, i was under the impression it couldn't be done,
Oadbylad, is the Lan adapter on both machines enabled? you can check this under Network and Sharing Centre>Manage Wireless adapters, are both machines on either the same homegroup (windows 7 only) or Workgroup (Windows 7 and another OS such as Vista) also check that both PC's are set to "obtain an IP address automatically"

direct from microsoft:
Configure TCP/IP

To use ICS, make sure the local area network (LAN) connection on each network computer is configured to get an IP address automatically. To do this:
  1. Open Network Connections by clicking the Start button , clicking Control Panel, clicking Network and Internet, clicking Network and Sharing Center, and then clicking Manage network connections.
  2. Right-click the LAN connection, and then click Properties. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
  3. Click Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6), and then click Properties.
  4. Click Obtain an IP address automatically or Obtain an IPv6 address automatically.

The Internet options on your network computers should also be configured for ICS. For more information, see Change Internet settings for ICS (Internet Connection Sharing).
Do not use ICS on a network with domain controllers, DNS servers, gateways, or DHCP servers. And don't use ICS on systems configured for static IP addresses.

My System SpecsSystem Spec
11 Apr 2010   #8

Windows 7 Ultimate
Thanks - saved me from madness

Hi Severedsolo,

Good timing - I just installed Ubuntu (dual boot) as a last resort.

ICS working now although still no internet connetcion on the other two PCs (Win 7 & Win XP). I'm hoping I can take it from here.

Your help is very much appreciated.
My System SpecsSystem Spec
12 Apr 2010   #9

Windows 7

Firstly thanks for all the replies...
I connect my PC via Wifi and a USB dongle distance 35 yds
This leaves the Lan free of which i want to connect a Dreambox (which is the same as a gaming machine)
RTL8139/810x Family Fast Ethernet Nic
This connection is made via a crossover cable as per instructions
and this is where my problem is stead of the drop down box giving Wifi ive nothing
In the Network Sharing Panel ive next to the "Unidentified Network" ive got the "No Internet Access"
As to the IPs i am aware they have to be within the same subnet range which i my case is governed by my static IP on my Dreambox
ive just made this post to clarify the problem and will be trying the above fixes and will post back as soon as Thank you all
My System SpecsSystem Spec

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