You can use --accept-dns=false flag for tailscale on your parents pihole. That makes it ignore the tailscale dns settings and move on.
It is step 1 on tailscale pihole guide
You can use --accept-dns=false flag for tailscale on your parents pihole. That makes it ignore the tailscale dns settings and move on.
It is step 1 on tailscale pihole guide
Do you have any suggestions for reputable security related websites?