How does Network >> DNS resolver work?

sorry but need to bump - i can't get this to resolve other than explicitly forwarding a known FQDN to a DNS server set within the resolver config e.g forward google.com to our caching DNS server. But thats only usable if you know the FQDN to forward, so not a workable solution. I've tried setting a wildcard of * to forward all, but the config is not accepted and seems limited to FQDN, it does allow com, net, org etc so i could forward each top level domain as a workaround, but that is not far from ideal. I'm unsure how this DNS resolver is supposed to work, i've set a BIND forwarder in system >> DNS, but that has not affect.

Any help or insight would be appreciated.