VPN and ICS

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kazbear

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Jul 13, 2003
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I have a 2 computer network. Both with XP home. One computer is connected to DSL with an internal modem. The 2 computers are networked with a simple hub. So, computer number 2 accesses the internet using ICS.

Now, I have my work Laptop (Windows 200). I connect it to the hub, and with a few changes, I can access the internet. On this laptop, I am running Nortel VPN Client (V4.65). When I try to connect, it says remote host not responding. I assume the VPN client cant figure out how to get to the internet.

(Currently, until I figure this out, I am not running a firewall...)
What should I try? Any suggestions?

Thanks
-kaz
 
Joined
Sep 13, 2003
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Did you install the VPN before the PC was part of your current LAN?

I did however find the following remarks which may be relevant

There is a misconception about ICS (Microsoft Internet Connection Sharing).
This product doesn't just share the connection, it also acts a little like a firewall as it blocks all ports <1024. Since Winvnc runs on 5900. then yes it is blocked from the Internet, but the internal adapter can still accept connections as it isn't blocked. There are ways to open the ports, but it requires registry editing to accomplish this. See Microsoft's support web site for more info (search string "ports blocked ics")
 

kazbear

Thread Starter
Joined
Jul 13, 2003
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5
Thanks for the feedback. I did install the VPN software before connecting it o the network.

You pointed me to MS which gave me some more hints. One thing I was told was to open ports 50 and 500. With your post I was able to figure out how to do that. However, it still did not work.

I got some other feedback saying: ICS does not support IPSec passthru.

This tells me it can't be done? Not sure what IPSec passthrough means. But, to solve my issue, I am being pointed to a hardware solution with a router.

I saw a diagram on the net somewhere showing my exact setup, but did not give any hints on how to make it work.

Thanks again for your help.
 
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