Dave Cox has just posted Can I disconnect my internet if VPN drops using your OSX VPN client?. I think anyone looking for service should check out LiquidVPN before buying service elsewhere. Below is an excerpt of the page.
Yes this is what the disconnect script is for. You can view the how to in our knowledgebase
– https://www.liquidvpn.com/faq-items/disconnect-vpn-internet-drops/ – Dave Cox
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