Bind router hostname only to one IP?

[devilkin]

Hi,

Perhaps a stupid question, but I haven't found a solution yet:

My router is called opnsense (duh), and it advertises itself via DNS on all router ip's. There are 5 of those.
For my own use, it'd be fantastic if I could restrict the DNS entry to only resolve to one of it's IP's - the management IP so to say. It's also the only one which is allowed (firewall rules).

I tried adding an unbound override, but that seems to be overridden.

Is there a way I can tell opnsense/unbound to only resolve itself to one IP?