2.2.5.1.2 DNS_ZONE_SECONDARY_SECURITY

The DNS_ZONE_SECONDARY_SECURITY enumeration is a 32-bit integer value that enumerates the types of security settings that are enforced by the master DNS server to honor zone transfer requests for this zone.

Constant/value	Description
ZONE_SECSECURE_NO_SECURITY 0x00000000	No security enforcement for secondaries, that is, any request will be honored.
ZONE_SECSECURE_NS_ONLY 0x00000001	Zone transfer request will be honored from the remote servers, which are in the list of name servers for this zone.
ZONE_SECSECURE_LIST_ONLY 0x00000002	Zone transfer request will be honored from the remote servers, which are explicitly configured by IP addresses in the aipSecondaries field in the DNS_RPC_ZONE_INFO structure (section 2.2.5.2.4).
ZONE_SECSECURE_NO_XFER 0x00000003	No zone transfer requests will be honored.