Dear DNS Coach,
What is Secondary DNS and why should I care?
In the business world redundancies hold a negative connotation. Why would anyone do the same thing twice unless they were overcompensating for something? However, in the world of DNS, redundancies are what define a provider’s success.
- For example, DNS Made Easy is well renowned for their Secondary DNS Services which create redundant DNS services for an organization’s domains.
In a nutshell,
- Secondary DNS creates a clone of the original zone information
- This is found at the primary DNS provider
- And then duplicates the original zone info on the DNS Made Easy IP Anycast+ network.
Should a user’s primary DNS operator suffer an outage, serving the domain’s record information on multiple DNS services provides users with an extra level of redundancy.
- For more information check out our help site.
But DNS Coach, why does this matter?
Well, if the user’s primary name servers were to go down as a result of a DDoS attack or for even an internal system failure: the DNS lookup done by the resolving name servers would have the opportunity to retry the DNS lookup at the secondary DNS service.
- Secondary DNS services are always running and require no startup time or downtime.
- This is all a seamless process that provides a barely noticeable effect to the end user and provides record-holding uptime histories like DNS Made Easy.
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Originally published at DNS Made Easy Blog.