flux did state he(she) was using a 2wire modem. Do you have one of these units.
According to what minimal documentation is on their website it is a modem and a router. Depending on the model it can have 1-4 ethernet ports, wifi and HPNA. The other computers that flux was talking about connect to the router via HPNA (Home Phone network adapter) .
So from the previous post the DSL modem/router has one ethernet port. The install guide again does not provide any real information and everything is setup using the install CD.
Do you have your network adaptor working? So we are going to have to work from scratch. In starting off I would look at the network configuration on the windows PCs. Write down the gateway address and DNS information. You might want to look at the routers configuration pages. After looking at the support web pages I found the routers IP address is: 172.16.0.1 or http://home
as its hostname.
You should be able to configure the SuSE's network adpater for DHCP and assign the gateway for the address above. I'm not real familer with SuSE and so I can't tell you exactly how to configure the network adapter if yast can not do it.
Check the /etc/resolv.conf file for DNS information. If you do not see any IP address then you can manually add them using the information collected from the windows boxes. Should be:
Add an entry for each DNS IP address that you copied from the windows boxes.