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23 Jun

Diagram 2 DNS Slave Server The term 'slave' was introduced with BIND 8.x and replaced the term 'secondary'.

Assuming NOTIFY is allowed in the master DNS for the zone (the default behaviour) then zone changes are propagated to all the servers defined with NS Records in the zone file.

Other acceptable NOTIFY sources can be defined using the also-notify parameter in Read it only when accompanied by your favorite keep-me-awake-cos-I-can't-take-anymore-of-this-stuff beverage.

These configurations confuse two distinct but related functions.

If a server is going to provide caching services then it must support recursive queries and recursive queries need access to the root servers which is provided via the 'type hint' statement.

If you're not yet aware of the security and productivity benefits Application Proxy brings to your organization, learn more about How to provide secure remote access to on-premises applications.Before you can enable and use Application Proxy services, you need to have: If your organization uses proxy servers to connect to the internet, read Work with existing on-premises proxy servers for details on how to configure them before you get started with Application Proxy.If a DNS server receives a query for a zone for which it is neither a Master nor a Slave then it will act as configured (in BIND this behaviour is defined in the file): A master DNS server can NOTIFY zone changes to defined (typically slave) servers - this is the default behaviour.NOTIFY messages ensure zone changes are rapidly propagated to the slaves (interrupt driven) rather than rely on the slave server periodically polling for changes.Example configuration files for a master DNS are provided.