@bcruze
Hi, thanks for advice. Very useful. I set up VPN, actually I have 2VPNs for wifi, and one for landline. Yes for general DNS tab, deleted everything but cloudFlare DNS records. VPN-specific DNS servers were configured on Services->DHCP server->xyz interface (assuming Services-.DNS resolver-general settings: "DNS Query Forwarding" is checked. Killswitch was set up on NAT by deleting appropriate WAN-related records - interestingly nobody mentions that NAT entries for outbound port 500 are irrelevant and can be deleted, if one is not using anything but OpenVPN. Works perfectly well. The best simple video user guide was this: https://www.youtube.com/watch?v=8jYibgeAV0Y.