PiHole ran successfully for about 24 Hrs, then stopped. As far as I can see it's fallen back to the router's (FreshTomato) DNS 2 (18.104.22.168). Replacing DNS 2 with 0.0.0.0 stops all traffic and doesn't force the use of DNS 1.
DNS 1 points to the RasberryPi address, on which I'm running PiHole: 22.214.171.124
I've seen suggested in other similar reports, to run on the PiHole machine (Raspberrypi) and the client machine (Linux laptop):
I'd be grateful for a bit of help, as I'm an 'old-newbie'!
Debug Token: 67axm373yu