Need help to set up kill switch (network lock) for VPN router ER605
I have two ER605 routers connected via a client-site L2TP VPN connection. The L2TP client has no problem connecting to the L2TP server in the remote router, but the problem is that if the VPN connection drops, the client will connect to my local internet connection and will reveal my local internet IP address. The ER605 does not have a kill switch (network lock) and, for that reason, I need help to create a kill switch on the client side so that the internet does not work if the VPN connection fails. Please let me know if there is a way to create a kill switch using routing policies or firewall rules to prevent my devices from connecting to my local internet connection if the VPN connection fails.