How to implement connection blocking by VPN - MAC OS?

Question

VPN

Good afternoon!
Tell me how to implement a ban on connections past VPN on MAC OS, do you need all connections to go through VPN?

Answer 1

Deny all traffic, except for the tunnel interface using a firewall (well, leave permission for the necessary traffic to the VPN server and DNS servers in order for the vpn connection to be established). For convenience, you can use:
www.hanynet.com/icefloor
or
www.murusfirewall.com