I just installed Ubuntu 12.04.02 alongside my Vista (didn't use wubi). On booting up, I configured my wired internet connection. It doesn't use DHCP, and uses a static private IP (given by my ISP) which by the use of NAT is assigned a public IP. I have entered all information like gateway, mask and DNS. Now when I startup Firefox and login to my ISP's router to connect, the internet speed is greatly reduced. My plan is for 256kbps and I get <10kBps. Also, the software center though doesn't show any error, doesn't update or install anything...Please help.