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Reverted just keeping one master server since we also use DKIM.
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Reverted just keeping one master server since we also use DKIM.

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We have a primary DNS server in the network but for some reason (likely due to security changes) it sometimes fails to respond DNS updates to the BIND slaves.<br />
<br />
Is it possible to have a tiered slave system so if an urgent DNS record update is required when the primary server is partially unresponsive it steps down?<br />
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I.E.<br />
Master &gt;&nbsp;Slave 1 &gt;&nbsp;Slave 2<br />
<br />
So Slave 2 would get DNS updates from Slave 1 rather than Master?<br />
<br />
That way if need be we can turn a zone from slave to master instantly on Slave 1 and Slave 2 would get the updates for our zones until we sort out the issues on Master then we can simply return the affected zone on Slave 1 back to a Slave zone&gt;
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We have a primary DNS server in the network but for some reason (likely due to security changes) it sometimes fails to respond DNS updates to the BIND slaves.

Is it possible to have a tiered slave system so if an urgent DNS record update is required when the primary server is partially unresponsive it steps down?

I.E.
Master > Slave 1 > Slave 2

So Slave 2 would get DNS updates from Slave 1 rather than Master?

That way if need be we can turn a zone from slave to master instantly on Slave 1 and Slave 2 would get the updates for our zones until we sort out the issues on Master then we can simply return the affected zone on Slave 1 back to a Slave zone>

Master-Master-Slave BIND setup

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.

Security

The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.