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All right...still, how do I get OPNsense to hand out IPv6 addresses within my delegated range?

Hi folks!

I'm setting up OPNsense for the first time with pi-hole (running on a different machine) as my DNS server. So far, I have everything working smoothly with IPv4, but setting things up with IPv6 as well is a bit of a mystery to me.

What I'd like to do is something very similar to my IPv4 setup, where my pi-hole machine gets a fixed address in its DHCP lease, then OPNsense hands that address out as the DNS server address for all IPv6 queries.

OPNsense is able to get a delegated range of addresses from my ISP.

I've figured out how to advertise the pi-hole machine's IPv6 address (which, confusingly, is not within the delegated range) as the IPv6 DNS server. However, I can't get any machine on my network to lease an IPv6 address from OPNsense.

How do I (a) assign the pi-hole machine an address within the delegated range I've pulled from the ISP, and (b) have OPNsense hand out IPv6 leases within the same delegated range?

Any help would be greatly appreciated!

Please let me know if you need more information to help solve this issue.

Thank you very much in advance!

- doop -