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Rather Nasty ICS Problem

M

mich43L

n00b
Joined
Nov 10, 2004
Messages
47
I've had my desktop performing ICS on a dial-up connection to a couple of my PCs on the network for a while now. Today, however, I added another PC to my network and the DHCP in the ICS desktop always gives it an IP address of 192.168.0.19. Incidentaly (I think) this always happens to be the address of the dial-up server whenever I connect to the net. This seems to be a conflict and I can't use either my LAN or the net on the new PC. When the ICS sever disconnects from the net everything is fine again.

I suppose I could just assign a static IP to the new PC but would rather not as it is a laptop that will be moving around often. Any ideas?
 
When ICS first premiered on Win98, someone wrote a utility for advanced configuration, mainly to allow port forwarding because the 98 version did not have a GUI interface to configure virtual servers as the XP and 2000 do. But also interesting in that utility was the ability to configure the range of IP addresses assigned by the ICS DHCP server.

http://www.practicallynetworked.com/sharing/ics/icsconfiguration.htm

I don't know if this utility works on XP, but essentially it modifies registry keys to assign a different DHCP range than the default 192.168.0.2+. If you can figure out which keys they are, you don't even have to use this utility. I would start out assigning higher addresses in the 192.168.0.100+ range so it doesn't conflict with any existing hosts. If ICS still won't work right, then you might try changing the subnet to something else (192.168.1.x).
 
Thanks for the ideas. I forgot to mention that it's impossible to edit settings on Windows XP's ICS like you could on 98. This includes changing the IP address on the sever. You can on the clients.

I sent an email to my dial-up system admin asking him/her to change the server IP address. I believe the specs forbid him to give that type of an IP address specifically because of this conflict. I'm still not completely sure why the conflict exists because although the dial-up server has the address in the form 192.168.0.x (same as my LAN), it has the subnet 255.255.255.255 (as opposed to 255.255.255.0 on my LAN) and it gives me a client IP address of 192.168.1.y .

Also, I don't understand why the ICS DHCP always gives my new laptop the address of 192.168.0.19. I thought it would change from session to session and it would be a random assignment.
 
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