How do we set up the guest account so it restricts Internet access to all applications and scripts in all ports?
Using parental controls only restricts web access, and I'm looking how to prevent any application to access the Internet.
I'm looking for a free solution that works even if the (guest) user runs malicious scripts. USB access is required for the guest account.
In Ubuntu we can restrict user access with a command like this:
sudo iptables -A OUTPUT -p all -m owner --uid-owner example_user -j DROP