DNS Forwarding dialog

Forward DNS requests for
Specify which domain names to forward DNS requests for.
Forwarding for only a specific domain name (and sub-names) is also know as "conditional forwarding".
To DNS servers
Specify the IP addresses of the DNS servers to forward these DNS requests to.
Enable Extended Forwarding
Also forward non-recursive DNS requests and DNS requests originating from IP addresses that are not offered recursion.
(Standard DNS forwarding only forwards recursive DNS requests from IP addresses offered recursion)
Enable Shadow Forwarding
Also forward DNS requests for the name or sub-name of a local DNS zone when no matching DNS records exist in that zone.
(Standard DNS forwarding only forwards request which are not for the name or sub-name of a local DNS zone)
In the "Authoritative Answer (AA) flag" dropdown, specify if the AA-flag in the response should be set or cleared.