We have 4 computers in our flat. When I'm starting to use Ubuntu and when I'm connected to our network, at least one of them has connection problems, that is, their connection status says that everything is fine, but they can't, for example, explore the Internet or play online games. Nothing like that happens when I'm using Windows. How to fix it? My Ubuntu version is 13.10
In Ubuntu 13.04, I believe the default bcmwl-kernel-source will not work correctly for your Broadcom 4313. I recommend that you get a temporary wired ethernet connection and open a terminal:
sudo apt-get remove --purge bcmwl-kernel-source wget http://us.archive.ubuntu.com/ubuntu/pool/restricted/b/bcmwl/bcmwl-kernel-source_18.104.22.168+bdcom-0ubuntu3_amd64.deb
Or, if yours is a 32-bit system:
Confirm 32- or 64-bit:
sudo dpkg -i bcmwl*.deb
Reboot and give us your report.
Have you check to see if your Ubuntu box is running a DHCP server?
It may be trying to act as a router.
sudo ps -ef | grep dhcp
and if it returns anything, you might want to kill that process.
Post the results and I can help further.