You have to configure the network internet access in YAST, the system configuration suite in suse. I haven't used suse in years, so I'm not sure exactly how to do that, but in general, you would configure the system to access the internet through your nic using dhcp. If you were connected to the net at the time you installed, this would be done automatically. You could get more specific help on suse here:
http://www.linuxquestions.org/questions/index.php
Post in the suse subforum under "Linux-Distributions".