How to block all outgoing traffic except openvpn?

Question

openvpn

Essence of the question
I use OpenVpn and it often breaks.
I would like to block all outgoing connections when OpenVpn breaks.
Can I somehow provide this with FireWall?
I sit via WiFi and distribute from the main computer

Answer 1

Maybe you can.
Remove the default gateway in the network connection settings.
Create a static route:
openvpn server address with mask 255.255.255.255 gateway your connection.
Next, connect to the open - check, it works, disconnect, check, connect, check.
And until you get bored.