pihole does not block ipv6 / stubborn ISP modem

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Expected Behaviour:

the dhcp server of pihole, which i am using does not give the right ipv6 dns to my phone.

Actual Behaviour:

the phone which uses wifi keeps on getting the ipv6 dns from the ISP modem, and that can't be disabled.
ipv6 is switched on in pihole.
I had however an older version of pihole that worked even with ipv6

Debug Token:

the token is https://tricorder.pi-hole.net/yagk66c7jb

can anyone please help?

We can't fix the ISP modem, if that's what your issue is. I would suggest getting a more configurable router.

I had the same issue where i asked niet Ido to disable IPv6. this fixes the it, only I had no ipv6 anymore.

Well I find out myselve that blocking ipv6 traffic outbound to port 53 is the solution. In any case better then buying another modem, which is not possible in this case because it is a 500mb docsis moden that is provided bij mij ISP.

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