WARNING: this guide assumes that you have no IPv6 connectivity. If you have, you should block outgoing IPv6 packets while connected to the VPN with "ip6tables". Please see https://airvpn.org/faq/software_lock   Here is a guide to prevent leaks and completely stop traffic when the VPN drops in Linux. If the openvpn connection drops you will not be able to access the internet while the firewall is activated. Just click the "stop firewall" button and reconnect with Openvpn, then re-enable to firewa