Cannot use ICS from a laptop

[Dario de Judicibus]

I cannot find ANY way to use ICS from a laptop. I have a domestic LAN. The
desktop is attached to Internet through ADSL. I have to use static IP
addresses in my LAN. Its address is 10.0.0.3. My laptop has TWO different
configurations. A DHCP one that I use in the office, and a static IP one
(10.0.0.2/255.255.255.0) that I use on domestic LAN. I use a NETSH script to
swap between configurations. Laptop can see desktop and share files,
printers, and anything else BUT Internet connection. No way to share it. The
only way to bypass the problem is to use a proxy on desktop, but there are
disadvantages. Any suggestions? I tried a lot of different solutions. No
way. I cannot use XP Wizard because I cannot permanently change laptop
configuration. Laptop are portable by definition, so there is a
configuration for each LAN I should connect to, depending on specific LAN
Admin rules. Both machines use Win XP (Pro and Home).

DdJ

 

[Ron Lowe]

I cannot find ANY way to use ICS from a laptop. I have a domestic LAN. The
desktop is attached to Internet through ADSL. I have to use static IP
addresses in my LAN. Its address is 10.0.0.3. My laptop has TWO different
configurations. A DHCP one that I use in the office, and a static IP one
(10.0.0.2/255.255.255.0) that I use on domestic LAN. I use a NETSH script to
swap between configurations. Laptop can see desktop and share files,
printers, and anything else BUT Internet connection. No way to share it. The
only way to bypass the problem is to use a proxy on desktop, but there are
disadvantages. Any suggestions? I tried a lot of different solutions. No
way. I cannot use XP Wizard because I cannot permanently change laptop
configuration. Laptop are portable by definition, so there is a
configuration for each LAN I should connect to, depending on specific LAN
Admin rules. Both machines use Win XP (Pro and Home).

DdJ

If you want to use ICS, you are going to have to change
your home LAN to use the 192.168.0.x address range.

On your Host machine, to enable ICS, the following must be true:

1. You must have 2 working network connections.

One for the Internet ( Perhaps a LAN card connecting to
an ADSL modem or perhaps a USB ADSL modem. );
-and-
One for the Internal LAN.

2. The XP firewall must be disabled on the internal LAN connection .

3. The ICF/ICS service must be running:

Start | Run , type 'services.msc'.
Look for "Internet Connection Firewall (ICF) / Internet
Connection Sharing (ICS)". If the Service status is Stopped,
start it, and set its startup type to automatic.

You should now be able to enable ICS on the Internal LAN connection.
This will force your internal LAN connection to be 192.168.0.1.

Now, on the client, you can leave the configuration on DHCP.
The ICS host acts as a DHCP server.
It will issue 192.168.0.x addresses,
255.255.255.0 subnet mask, 192.1.68.0.1 Default GW;
and point DNS to 192.168.0.1 also.
( The ICS host will act as a DNS forwarder. )

If you wist to assign the client statically anyway, then you can.
Just use the values I listed above.
Perhaps 192.168.0.2 / 255.255.255.0
Def. GW = 192.168.0.1
DNS = 192.168.0.1 ( or your ISPs DNS. )

--

Best Regards,
Ron Lowe
MS-MVP Windows Networking