Set up traffic rule to allow communicaon ONLY when VPN is connected

Hello-

I've been trying to set up a traffic rule to prohibit communication to and from my pc to the internet should the VPN connection drop. I am running WIN10 with NIS latest version.   I found an article on here from 2011 pertaining to program rules but I am looking for an overall rule to accomplish this rather than on a per program basis as I don't want to expose my ip.  Norton online support was of no help.  Last resort is to uninstall and install without the firewall and use windows firewall.     Can anyone help?

https://community.norton.com/en/forums/custom-program-rulesfirewall-vpn