I manage some internal zones using BIND9 and would like the OPNsense unbound to forward requests to the Bind name server. This works for several zones like first.site or second.site, but not for home.arpa.
Does home.arpa have a special meaning and therefore isn't forwarded?
If there are domains with private IPs in the zone, you have to add it to
Services: Unbound DNS: Advanced > Private Domains
Have you done this?
No, I didn't. But it didn't help either. Unbound doesn't forward requests to home.arpa to the specified server, even after I set it up as a private domain. As far as I can tell, the request doesn't even arrive there.