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Internet Connection Sharing in W2K

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by dragon emperor 2 views

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I have been trying to enable ICS on a Windows 2000 Workstation. The W2K System can then still connect browse fine. Clients get an IP address, but when browsing make no progress after the URL is resolved. I have seen this before when the Gateway is set wrong, but the clients seem to detect the gateway correctly. Pinging the Gateway times out. This fails with a variety of client OSes (W2K and Win9x). I thought it might be a security issue, but cannot find anything that would be affecting it. IPSec is not enabled. My firewall does not appear to be the problem either.

10 replies

by mpdcsup

If your clients are detecting the gateway, there's your problem. The ICS feature of W2K is Proxy Server in disguise.

The following was found at:
http://www.microsoft.com/WINDOWS2000/smallbiz/003march/ics.asp

Here?s how to configure the client computers on the network.

Verify that a TCP/IP is installed and communicating with the Network Interface Card by doing the following:

Click Start, point to Settings, and then click Network dial-up connections.
Right click Local Area Connection and then select Properties.
Select the TCP/IP Properties tab and verify that the TCP/IP properties for the NIC are configured to obtain an IP address and DNS server automatically, and to verify that DHCP is being used.
Reboot the machine. This will allow the computer to pick up the network information from the ICS host.
Configure Internet Explorer for use on the client computers:

On the Tools menu in Internet Explorer, click Internet Options, and then click the Connections tab.
In Dial-Up Settings, click Never dial a connection, and then click LAN Settings.
In Automatic Configuration, select the Automatically detect settings check box and clear the Use automatic configuration script check box.
In Proxy Server, clear the Use a proxy server check box.

by mpdcsup

Also, according to this article, the server needs to NIC cards -- but, you *should* be able to multi-home the host with one *if* you know what you're doing.

by dragon emperor

I had already looked up the help on Microsoft's web site. My clients are properly being assigned IP addresses and they discover the address of the Gateway correctly. They even resolve the correct IP address when trying to load a web page, but theynever get any farther than that.

by dcyr

I have a similar configuration to share a DSL connection. I have found that I need to ensure that all of my clients are running IE 55 in order to reliably access the Internet.
I also had to install a second network card in my server in order to service more than one host. Tech support explained that they use a very light proxy on their end and that my systems were choking when they had to go through two proxies. How do you know that the clients are seeing the gateway properly?

by dragon emperor

I tried putting IE 5.5 on my clients and they behaved exactly the same. It is my understanding that my clients should see my second network card as the Gateway (the one with the 192.168.0.1 address), and that is what they see. The clients also getIP addresses from the "server" machine fine. However, they cannot ping the gateway machine and though they detect the internet and determine the paths they must go to, they never succeed in bringing up a page. My LAN is 100 ethernet and my ISP connection is a cable modem that usually receives at around T1 speed.

by dragon emperor

When I do a pathping it shows the correct address of whatever site I am trying to ping, but it never makes it away from the Gateway.
hop Lost/Sent Address
0 192.168.0.163
1 100/100 0.0.0.0
And yet the addresses resolve fine.

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