Your problem may be that you have not completed the process of setting up your ISP connection. You may not have entered your Domain Name Server.
If not, then call your ISP and ask them what DNS server they use. Ask for the name in both letters and numbers. They will give you an answer in the form:
Then you can tell ppp what the DNS is in two ways:
1. As root run YaST2. In Advanced Networking there is a table of DNS names. Enter both the number name and letter name in that table and YaST2 will store the information in /etc/resolv.conf
2. You can edit /etc/resolv.conf with a text editor.and enter two lines in this format:
Be prepared. Create a LifeBoat CD.