I am running a Power Mac G3 (beige) and a Acer PC . I connected the two with a crossover ethernet cable. The PC has a 100 base t ethernet while the mac has a 10 base t no hub it is crossover.
When I have a configuration set up for my ISP it uses PPP and PPP server so that the ip address, subnetmask, and router address are supplied by server.
My home network configuration set has defined ip number, subnet mask and routher address.
When I connect to my pc via Timbuktu Pro and then I quit I go and change my settings to my ISP configuration. But when I go to look up the TCP/IP settings for the ISP configuration I see that after I use the home network and then change to my ISP that the computer changes the ISP config to have my local network ip address, subnet, and routter. It is not set to be supplied by server anymore. What is wrong how can I make it so they do not change an conflict with eachother?

I have the same type of setup (mac/pc networked with a crossover cable). It took me a while to figure out how to set the whole thing up in the first place. I haven't had any problems with my TCP/IP configurations changing on me. Have you tried locking the settings in each TCP/IP configuration? Go to the edit menu and change the user mode to administration. Locks will appear next to each of the settings to lock or unlock them.

The only difference we might have is that I don't use Timbuktu. I use an FTP server on my PC and use Fetch to pass files back and forth. I also tossed out the location manager (I tried it for a while but it seemed to be more trouble than it was worth). What I really need is an applescript to change the TCP/IP configuration without having to open the control panel and manually change it. Unfortunately I haven't had any luck writing one.

Hope this helps

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Greg Pare
Smiling Dog web design

Simplest and cheapest solution:
Turn the pc (or the mac) into a router

PC: If it has windows 98, then go to MS and buy the Windows 98 second edition upgrade cd for about $20. This has internet connection sharing built in.

Win 95:
Buy SyGate for the PC
or Mac:
Buy something from vicomsoft

Other solutions at: http://www.cablemodeminfo.com/cablesoftware.html

More expensive solution ($150 or less): go to hardware.
Look on www.onsale.com for thier networking routers that do modems.