So I have to say that everything is working so far and I don’t notice any difference to a public DNS.
However, I still don’t know if the deactivation of ipv6 or the addition of the ZonetoCache is responsible for this.
Before this change, the resolution times of the pdns-recursor were really unbearably slow and clearly noticeable
I’ll let it continue like this for now and will switch ipv6 on again when I get the chance and see what happens.
nevertheless ZonetoCache should be added to the vyos configuration ! Is there a dev reading here who could integrate this?