I assume your router performs NAT for your network (since it's a DSL)
The easiest way to connect your linux box would be:
1. Go to your winbox, control panel, network connections. Right click on your internet connection, select properties. In the window that appears select "Internet Protocol (TCP/IP)", select it and click "Properties" button.
2. You'll see a window with your connection data - IP, Gateway, Mask, DNS. If they're left blank - DHCP is active. If not, write them down.
3. Go to your SuSe box and use that pretty tool suse has for configuring network (I don't know suse but it sure has one)
4. If DHCP is running, just mark "Obtain automatically" field (or something similar), if not ...
5. Enter in correct fields network mask, gateway. Add your dns server to /etc/resolv.conf files. Enter IP address from the same network, but different from gateway and winbox.
6. If you don't know what's IP part about - ip consists of four numbers which are dot separated. Just increase last of them by 5, usually works
I think Suse uses Yast2 for network configuration now.
M.