While this statement would normally be used in a zone of type 'master' there is nothing to prevent its use in a 'slave' zone - in which case the NOTIFY would be triggered following a zone transfer to the slave. Defines an alternative local IP address to be used for inbound zone transfers by the server if that defined by transfer-source (transfer-source-v6) fails and use-alt-transfer-source is enabled.
This address must appear in the remote end's allow-transfer statement for the zone being transferred.
These IP(s)s are in addition to those listed in the NS records for the zone.
This statement is mutually exclusive with update-policy and applies to master zones only.
The example shows DDNS for three zones: the first disables DDNS explicitly, the second uses an IP-based list, and the third references a key clause.
If a global notify statement is 'no' this statement may be used to override it for a specific zone and, conversely, if the global options contain a also-notify list, setting notify 'no' in the zone will override the global option.
This statement may be used in normal zone, view or a global options clause.
masters-list may be used to reference a list of servers (slaves) defined in a masters clause each of which will be sent a NOTIFY.
The key-name field defines the key to be used to authenticate the NOTIFY when using TSIG and references the name of a key clause; a corresponding key clause with the same key-name must be present in the slave server(s) for the zone.allow-update-forwarding defines a match list, for instance, IP address(es) that are allowed to submit dynamic updates to a 'slave' sever for onward transmission to a 'master'.This statement may be used in zone, view or an options clause.Normally incremental zone transfers are only possible when used in conjunction with Dynamic DNS (DDNS).ixfr-from-diffrences allows the slave server to create incremental zone transfers for non-dynamic zones.If set to yes when the server receives a new version of a slave file by a non-incremental zone transfer it will compare the new version to the previous one and calculate a set of differences.