From Fedora Project Wiki
< Networking | NameResolution
Manual configuration via Unbound
TBD
Local zones
TBD
Global zone
TBD
Using dnssec-trigger (for testing only)
dnssec-trigger configures /etc/resolv.conf to use a local unbound instance on 127.0.0.1 and Unbound to use a secure global zone with nameservers submitted through dnssec-trigger-control or, if those aren't suitable, using public nameservers run by Fedora or the upstream project.
It also performs captive portal (hotspot) detection and temporarily changes /etc/resolv.conf to include the nameservers of the local network directly. That unfortunately breaks the local zones used with any network interfaces including those that have nothing to do with the captive portal connection.
NetworkManager integration
TBD
Debugging
Show connection zones configuration in unbound:
unbound-control list_forwards
To check NetworkManager's view of the configuration, use:
nmcli connection show --active nmcli connection show --active <id/uuid>