You need DNS IP addresses also. How far can you get? Try to ping things, to find out.
ie. ping 192.168.1.17 or ping 75.126.162.205 ( this is the IP address of linuxquestions.org.
If you tried to ping say, ping
www.google.co/linux , without DNS, you won't have the IP address, since DNS servers provide this function. You can get DNS addresses for some routers, or from say a windows machine that is working.
Hope this helps.