Revision of Disable internet access for particular user in Ubuntu from Wed, 01/09/2008 - 03:45

This is very useful if you want to block internet access to your kids or particular users
First you need to edit the network interfaces file using the following comamnd
sudo vi /etc/network/interfaces
or
sudo gedit /etc/network/interfaces
Now you need to add the simple iptables rule to the interfaces file when the internet connection starts up
Simply add this under auto [...]