VERY NEWBIE (sorry the English)

I'm starting with Linux. After a few days (and nights) I have a dual boot (Win98/Linux) PC. Now I need connect to my home server (Win98) with Microsoft Internet Sharing (cable modem). This server have two Lan cards: one connected to the Hub (LAN) and the other to the cable-modem. The server IP is 192.168.0.1, and my pc is 192.168.0.3 (in Windows). The question is: How can I connect to the Internet trough the Win98 server? I really want leave Windows!...

Thanks

Just to clarify, Are you using the following configuration?

(cable modem)-->(linux)-->(win98)

or,

(cable modem)-->(win98)-->(linux)

I have similar net at home, and maybe the problem that you have is that you need to share your windows internet conection. Versions before windows 98 second edition does not have this capability, so if it is "first edition" you will need a program to share internet conection. You can download Win Route. If it is second edition version you can share easily in your conection properties.
Of course, you need to specify the gateway in your Linux box
Hope this could be helpfully.

(cable modem)-->(win98)-->(linux)
I just can't see win98 from linux...
With windows 98SE my pc is 192.168.0.3, and the other is 192.168.0.1 (hard specified), but this one is connected to the internet through another card (dynamic ip). The modem cable is a motorola with DHCP support. If I could see the other, who knows, perhaps I could see the Net, and I could use linux from now...
Sorry, I know this is very basic

Well... Here is how I solved the same issue in my home network. I used internet connection sharing for a while, and found it to be unreliable. I constantly needed to reboot, and forwarding ports was next to impossible in 98SE
I asked arround and found a friend that had an old P133 in his garage, and he was glad for me to haul it off for him. I then stacked in as much ram as possible, and installed clarkconnect. There are many "micro" distros out there for setting up linux routers, but I felt this one met my needs the best. I tried freesco, but found that clarkconnect easier to learn. Go to www.clarkconnect.org and take a look at what they have to offer, but dont just rely on what I say. It is possible that there is better distro's out there for your needs. The best bet might be to search in google for "linux firewall" and take a look at whats out there. You can get just about any bootable computer that you can fit two network cards in to run as a linux router. The big thing to me was trying to find the quietest computer possible.

In all honesty, I was introduced to linux because of the router project, and I loved the routers stability so much, that I converted two of the three computers in my house over to linux. (My son insists on running windows because of his games)

Sorry about the double post here, but I just re-read your post, and it seems that I missed what you were saying all together.

So in the end what you want is to totally connect threw the win98 computer, and at the same time see the server on that box?

If so, do what Machinegun said.

Try setting up internet connection sharing in "add remove programs / Windows setup" on the 98SE computer. The win98SE computer will then become a DHCP server for the linux computer. That should make it possoble to use the internet, and to see the win98 server. The only problem is that you wont be able to access any servers on the linux box from the internet unless you use some sort of nat software, and they cost $$$ and arent very secure in 98. Other than that, if all you are going to do is browse the internet, this should do the job.