%sudo     ALL=(:no-internet)      NOPASSWD: ALL

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>

#!/bin/sh
# Firewall apps - only allow apps run from "internet" group to run

# clear previous rules
sudo iptables -F

# accept packets for internet group
sudo iptables -A OUTPUT -p tcp -m owner --gid-owner internet -j ACCEPT

# also allow local connections
sudo iptables -A OUTPUT -p tcp -d 127.0.0.1 -j ACCEPT
sudo iptables -A OUTPUT -p tcp -d 192.168.0.1/24 -j ACCEPT

# reject packets for other users
sudo iptables -A OUTPUT -p tcp -j REJECT

# open a shell with internet access
sudo -g internet -s

# run app without access to internet
    sudo unshare -n sudo -u my_user my_app