How to disable access when OpenVPN breaks?

Question

openvpn

Good afternoon
How to make sure that traffic does not leak anywhere when openvpn breaks? Including DNS traffic.
Can you provide the finished iptables file if you have it?

Answer 1

According to my observation, if OpenVPN breaks, then my Internet just drops! What's wrong with you?
And on Windows, yes, there were problems, if OpenVPN fell, then the PC climbed into the network under its own Internet.
Ubuntu is different.