Exactly what you are looking for: http://forum.mikrotik.com/t/nordvpn-ipsec-ikev2-killswitch-for-ros6/144817/1
Surfshark steps are almost identical. Link is also there.
Exactly what you are looking for: http://forum.mikrotik.com/t/nordvpn-ipsec-ikev2-killswitch-for-ros6/144817/1
Surfshark steps are almost identical. Link is also there.