In Configuration → DNS forwarder, allow forwarding of DNS requests and set parameters for the DNS forwarder:
It is recommended to enable the Enable cache... option (this will fasten responses to repeated DNS queries).
Enable the Use custom forwarding option Add the rule for forwarding of requests to the Active Directory, i.e. of all requests for names starting with _
(underscore), to the domain server in the LAN — see figure 2.13 Forwarding of DNS requests to Active Directory. This setting is required for correct communication of local computers with the domain server.
It is also necessary to add rules for correct forwarding of DNS queries between the headquarters' network and networks of branch offices. For detailed description on these settings, refer to chapter 4.1 Headquarters configuration (or to chapter 4.2 Configuration of a filial office).
Enable options 'hosts' file and DHCP lease table. Cooperation with DHCP server allows that DNS forwarder can response to requests for names of computers with IP addresses assigned dynamically. Then it is possible to add custom records manually as needed in the hosts
file.