Browsers no longer connect

openSUSE 13.1 64bit KDE

All of a sudden none of my browsers on my netbook will connect to any address. Not even an IP. Skype connects normally, and I can ping IP addresses but not web pages. It reports "ping : unknown host www.google.com". I haven't been fooling around with YaST, but I suspect I have accidentally blocked a port. I use Network Manager it and reports that I am connected both with wire and wireless connections.

Thanks for any suggestions.