after updating 12.10 ubuntu the wan is not working properly, follow this guide to re-enable it.

I had a similar problem, it was resolved by following the steps here

WiFi Stops Working After Upgrading To Ubuntu 12.10 (Broadcom Wireless cards)

You can fix wifi problems using two methods:

  • Either connect to the internet via wired connection and run this command:
    sudo apt-get update && sudo apt-get upgrade

Then reboot your system.

  • Or use the following commands:
    sudo apt-get install linux linux-headers-generic kernel-package
    sudo apt-get install --reinstall bcmwl* firmware-b43-lpphy-installer b43-fwcutter

Finally, reboot your system.

If that didn’t help, try these commands:

sudo apt-get remove bcmwl-kernel-source

sudo apt-get install firmware-b43-installer b43-fwcutter

sudo reboot

another version:

If there is a way to connect to the Internet, you can install the following packages in order to use wireless connections.

Open the Software Center and search&find&install these packages:



or you can install these packages with a terminal command(Short cut:Ctrl+Alt+T):

sudo apt-get install b43-fwcutter firmware-b43-installer

If your pc haven’t a another internet connection, you can download driver packages from the following urls.

Please, be careful of packages architecture(The packages architecture you will choose must be same as your Ubuntu architecture.)

After this operation reboot your system and connect a wireless network.